import React, { useState, useEffect, useRef } from 'react';
import { GitBranch, GitCommit, Plus, Minus, RefreshCw, Check, X, ChevronDown, ChevronRight, Info, History, FileText, Mic, MicOff, Sparkles, Download, RotateCcw, Trash2, AlertTriangle, Upload } from 'lucide-react';
import { MicButton } from './MicButton.jsx';
import { authenticatedFetch } from '../utils/api';

function GitPanel({ selectedProject, isMobile }) {
  const [gitStatus, setGitStatus] = useState(null);
  const [gitDiff, setGitDiff] = useState({});
  const [isLoading, setIsLoading] = useState(false);
  const [commitMessage, setCommitMessage] = useState('');
  const [expandedFiles, setExpandedFiles] = useState(new Set());
  const [selectedFiles, setSelectedFiles] = useState(new Set());
  const [isCommitting, setIsCommitting] = useState(false);
  const [currentBranch, setCurrentBranch] = useState('');
  const [branches, setBranches] = useState([]);
  const [wrapText, setWrapText] = useState(true);
  const [showLegend, setShowLegend] = useState(false);
  const [showBranchDropdown, setShowBranchDropdown] = useState(false);
  const [showNewBranchModal, setShowNewBranchModal] = useState(false);
  const [newBranchName, setNewBranchName] = useState('');
  const [isCreatingBranch, setIsCreatingBranch] = useState(false);
  const [activeView, setActiveView] = useState('changes'); // 'changes' or 'history'
  const [recentCommits, setRecentCommits] = useState([]);
  const [expandedCommits, setExpandedCommits] = useState(new Set());
  const [commitDiffs, setCommitDiffs] = useState({});
  const [isGeneratingMessage, setIsGeneratingMessage] = useState(false);
  const [remoteStatus, setRemoteStatus] = useState(null);
  const [isFetching, setIsFetching] = useState(false);
  const [isPulling, setIsPulling] = useState(false);
  const [isPushing, setIsPushing] = useState(false);
  const [isPublishing, setIsPublishing] = useState(false);
  const [isCommitAreaCollapsed, setIsCommitAreaCollapsed] = useState(isMobile); // Collapsed by default on mobile
  const [confirmAction, setConfirmAction] = useState(null); // { type: 'discard|commit|pull|push', file?: string, message?: string }
  const textareaRef = useRef(null);
  const dropdownRef = useRef(null);

  useEffect(() => {
    if (selectedProject) {
      fetchGitStatus();
      fetchBranches();
      fetchRemoteStatus();
      if (activeView === 'history') {
        fetchRecentCommits();
      }
    }
  }, [selectedProject, activeView]);

  // Handle click outside dropdown
  useEffect(() => {
    const handleClickOutside = (event) => {
      if (dropdownRef.current && !dropdownRef.current.contains(event.target)) {
        setShowBranchDropdown(false);
      }
    };
    
    document.addEventListener('mousedown', handleClickOutside);
    return () => document.removeEventListener('mousedown', handleClickOutside);
  }, []);

  const fetchGitStatus = async () => {
    if (!selectedProject) return;
    
    
    setIsLoading(true);
    try {
      const response = await authenticatedFetch(`/api/git/status?project=${encodeURIComponent(selectedProject.name)}`);
      const data = await response.json();
      
      
      if (data.error) {
        console.error('Git status error:', data.error);
        setGitStatus({ error: data.error, details: data.details });
      } else {
        setGitStatus(data);
        setCurrentBranch(data.branch || 'main');
        
        // Auto-select all changed files
        const allFiles = new Set([
          ...(data.modified || []),
          ...(data.added || []),
          ...(data.deleted || []),
          ...(data.untracked || [])
        ]);
        setSelectedFiles(allFiles);
        
        // Fetch diffs for changed files
        for (const file of data.modified || []) {
          fetchFileDiff(file);
        }
        for (const file of data.added || []) {
          fetchFileDiff(file);
        }
      }
    } catch (error) {
      console.error('Error fetching git status:', error);
    } finally {
      setIsLoading(false);
    }
  };

  const fetchBranches = async () => {
    try {
      const response = await authenticatedFetch(`/api/git/branches?project=${encodeURIComponent(selectedProject.name)}`);
      const data = await response.json();
      
      if (!data.error && data.branches) {
        setBranches(data.branches);
      }
    } catch (error) {
      console.error('Error fetching branches:', error);
    }
  };

  const fetchRemoteStatus = async () => {
    if (!selectedProject) return;
    
    try {
      const response = await authenticatedFetch(`/api/git/remote-status?project=${encodeURIComponent(selectedProject.name)}`);
      const data = await response.json();
      
      if (!data.error) {
        setRemoteStatus(data);
      } else {
        setRemoteStatus(null);
      }
    } catch (error) {
      console.error('Error fetching remote status:', error);
      setRemoteStatus(null);
    }
  };

  const switchBranch = async (branchName) => {
    try {
      const response = await authenticatedFetch('/api/git/checkout', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name,
          branch: branchName
        })
      });
      
      const data = await response.json();
      if (data.success) {
        setCurrentBranch(branchName);
        setShowBranchDropdown(false);
        fetchGitStatus(); // Refresh status after branch switch
      } else {
        console.error('Failed to switch branch:', data.error);
      }
    } catch (error) {
      console.error('Error switching branch:', error);
    }
  };

  const createBranch = async () => {
    if (!newBranchName.trim()) return;
    
    setIsCreatingBranch(true);
    try {
      const response = await authenticatedFetch('/api/git/create-branch', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name,
          branch: newBranchName.trim()
        })
      });
      
      const data = await response.json();
      if (data.success) {
        setCurrentBranch(newBranchName.trim());
        setShowNewBranchModal(false);
        setShowBranchDropdown(false);
        setNewBranchName('');
        fetchBranches(); // Refresh branch list
        fetchGitStatus(); // Refresh status
      } else {
        console.error('Failed to create branch:', data.error);
      }
    } catch (error) {
      console.error('Error creating branch:', error);
    } finally {
      setIsCreatingBranch(false);
    }
  };

  const handleFetch = async () => {
    setIsFetching(true);
    try {
      const response = await authenticatedFetch('/api/git/fetch', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name
        })
      });
      
      const data = await response.json();
      if (data.success) {
        // Refresh status after successful fetch
        fetchGitStatus();
        fetchRemoteStatus();
      } else {
        console.error('Fetch failed:', data.error);
      }
    } catch (error) {
      console.error('Error fetching from remote:', error);
    } finally {
      setIsFetching(false);
    }
  };

  const handlePull = async () => {
    setIsPulling(true);
    try {
      const response = await authenticatedFetch('/api/git/pull', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name
        })
      });
      
      const data = await response.json();
      if (data.success) {
        // Refresh status after successful pull
        fetchGitStatus();
        fetchRemoteStatus();
      } else {
        console.error('Pull failed:', data.error);
        // TODO: Show user-friendly error message
      }
    } catch (error) {
      console.error('Error pulling from remote:', error);
    } finally {
      setIsPulling(false);
    }
  };

  const handlePush = async () => {
    setIsPushing(true);
    try {
      const response = await authenticatedFetch('/api/git/push', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name
        })
      });
      
      const data = await response.json();
      if (data.success) {
        // Refresh status after successful push
        fetchGitStatus();
        fetchRemoteStatus();
      } else {
        console.error('Push failed:', data.error);
        // TODO: Show user-friendly error message
      }
    } catch (error) {
      console.error('Error pushing to remote:', error);
    } finally {
      setIsPushing(false);
    }
  };

  const handlePublish = async () => {
    setIsPublishing(true);
    try {
      const response = await authenticatedFetch('/api/git/publish', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name,
          branch: currentBranch
        })
      });
      
      const data = await response.json();
      if (data.success) {
        // Refresh status after successful publish
        fetchGitStatus();
        fetchRemoteStatus();
      } else {
        console.error('Publish failed:', data.error);
        // TODO: Show user-friendly error message
      }
    } catch (error) {
      console.error('Error publishing branch:', error);
    } finally {
      setIsPublishing(false);
    }
  };

  const discardChanges = async (filePath) => {
    try {
      const response = await authenticatedFetch('/api/git/discard', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name,
          file: filePath
        })
      });
      
      const data = await response.json();
      if (data.success) {
        // Remove from selected files and refresh status
        setSelectedFiles(prev => {
          const newSet = new Set(prev);
          newSet.delete(filePath);
          return newSet;
        });
        fetchGitStatus();
      } else {
        console.error('Discard failed:', data.error);
      }
    } catch (error) {
      console.error('Error discarding changes:', error);
    }
  };

  const deleteUntrackedFile = async (filePath) => {
    try {
      const response = await authenticatedFetch('/api/git/delete-untracked', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name,
          file: filePath
        })
      });
      
      const data = await response.json();
      if (data.success) {
        // Remove from selected files and refresh status
        setSelectedFiles(prev => {
          const newSet = new Set(prev);
          newSet.delete(filePath);
          return newSet;
        });
        fetchGitStatus();
      } else {
        console.error('Delete failed:', data.error);
      }
    } catch (error) {
      console.error('Error deleting untracked file:', error);
    }
  };

  const confirmAndExecute = async () => {
    if (!confirmAction) return;

    const { type, file, message } = confirmAction;
    setConfirmAction(null);

    try {
      switch (type) {
        case 'discard':
          await discardChanges(file);
          break;
        case 'delete':
          await deleteUntrackedFile(file);
          break;
        case 'commit':
          await handleCommit();
          break;
        case 'pull':
          await handlePull();
          break;
        case 'push':
          await handlePush();
          break;
        case 'publish':
          await handlePublish();
          break;
      }
    } catch (error) {
      console.error(`Error executing ${type}:`, error);
    }
  };

  const fetchFileDiff = async (filePath) => {
    try {
      const response = await authenticatedFetch(`/api/git/diff?project=${encodeURIComponent(selectedProject.name)}&file=${encodeURIComponent(filePath)}`);
      const data = await response.json();
      
      if (!data.error && data.diff) {
        setGitDiff(prev => ({
          ...prev,
          [filePath]: data.diff
        }));
      }
    } catch (error) {
      console.error('Error fetching file diff:', error);
    }
  };

  const fetchRecentCommits = async () => {
    try {
      const response = await authenticatedFetch(`/api/git/commits?project=${encodeURIComponent(selectedProject.name)}&limit=10`);
      const data = await response.json();
      
      if (!data.error && data.commits) {
        setRecentCommits(data.commits);
      }
    } catch (error) {
      console.error('Error fetching commits:', error);
    }
  };

  const fetchCommitDiff = async (commitHash) => {
    try {
      const response = await authenticatedFetch(`/api/git/commit-diff?project=${encodeURIComponent(selectedProject.name)}&commit=${commitHash}`);
      const data = await response.json();
      
      if (!data.error && data.diff) {
        setCommitDiffs(prev => ({
          ...prev,
          [commitHash]: data.diff
        }));
      }
    } catch (error) {
      console.error('Error fetching commit diff:', error);
    }
  };

  const generateCommitMessage = async () => {
    setIsGeneratingMessage(true);
    try {
      const response = await authenticatedFetch('/api/git/generate-commit-message', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name,
          files: Array.from(selectedFiles)
        })
      });
      
      const data = await response.json();
      if (data.message) {
        setCommitMessage(data.message);
      } else {
        console.error('Failed to generate commit message:', data.error);
      }
    } catch (error) {
      console.error('Error generating commit message:', error);
    } finally {
      setIsGeneratingMessage(false);
    }
  };

  const toggleFileExpanded = (filePath) => {
    setExpandedFiles(prev => {
      const newSet = new Set(prev);
      if (newSet.has(filePath)) {
        newSet.delete(filePath);
      } else {
        newSet.add(filePath);
      }
      return newSet;
    });
  };

  const toggleCommitExpanded = (commitHash) => {
    setExpandedCommits(prev => {
      const newSet = new Set(prev);
      if (newSet.has(commitHash)) {
        newSet.delete(commitHash);
      } else {
        newSet.add(commitHash);
        // Fetch diff for this commit if not already fetched
        if (!commitDiffs[commitHash]) {
          fetchCommitDiff(commitHash);
        }
      }
      return newSet;
    });
  };

  const toggleFileSelected = (filePath) => {
    setSelectedFiles(prev => {
      const newSet = new Set(prev);
      if (newSet.has(filePath)) {
        newSet.delete(filePath);
      } else {
        newSet.add(filePath);
      }
      return newSet;
    });
  };

  const handleCommit = async () => {
    if (!commitMessage.trim() || selectedFiles.size === 0) return;
    
    setIsCommitting(true);
    try {
      const response = await authenticatedFetch('/api/git/commit', {
        method: 'POST',
        headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({
          project: selectedProject.name,
          message: commitMessage,
          files: Array.from(selectedFiles)
        })
      });
      
      const data = await response.json();
      if (data.success) {
        // Reset state after successful commit
        setCommitMessage('');
        setSelectedFiles(new Set());
        fetchGitStatus();
        fetchRemoteStatus();
      } else {
        console.error('Commit failed:', data.error);
      }
    } catch (error) {
      console.error('Error committing changes:', error);
    } finally {
      setIsCommitting(false);
    }
  };

  const renderDiffLine = (line, index) => {
    const isAddition = line.startsWith('+') && !line.startsWith('+++');
    const isDeletion = line.startsWith('-') && !line.startsWith('---');
    const isHeader = line.startsWith('@@');
    
    return (
      <div
        key={index}
        className={`font-mono text-xs ${
          isMobile && wrapText ? 'whitespace-pre-wrap break-all' : 'whitespace-pre overflow-x-auto'
        } ${
          isAddition ? 'bg-green-50 dark:bg-green-950 text-green-700 dark:text-green-300' :
          isDeletion ? 'bg-red-50 dark:bg-red-950 text-red-700 dark:text-red-300' :
          isHeader ? 'bg-blue-50 dark:bg-blue-950 text-blue-700 dark:text-blue-300' :
          'text-gray-600 dark:text-gray-400'
        }`}
      >
        {line}
      </div>
    );
  };

  const getStatusLabel = (status) => {
    switch (status) {
      case 'M': return 'Modified';
      case 'A': return 'Added';
      case 'D': return 'Deleted';
      case 'U': return 'Untracked';
      default: return status;
    }
  };

  const renderCommitItem = (commit) => {
    const isExpanded = expandedCommits.has(commit.hash);
    const diff = commitDiffs[commit.hash];
    
    return (
      <div key={commit.hash} className="border-b border-gray-200 dark:border-gray-700 last:border-0">
        <div 
          className="flex items-start p-3 hover:bg-gray-50 dark:hover:bg-gray-800 cursor-pointer"
          onClick={() => toggleCommitExpanded(commit.hash)}
        >
          <div className="mr-2 mt-1 p-0.5 hover:bg-gray-200 dark:hover:bg-gray-700 rounded">
            {isExpanded ? <ChevronDown className="w-3 h-3" /> : <ChevronRight className="w-3 h-3" />}
          </div>
          <div className="flex-1 min-w-0">
            <div className="flex items-start justify-between gap-2">
              <div className="flex-1 min-w-0">
                <p className="text-sm font-medium text-gray-900 dark:text-white truncate">
                  {commit.message}
                </p>
                <p className="text-xs text-gray-500 dark:text-gray-400 mt-1">
                  {commit.author} • {commit.date}
                </p>
              </div>
              <span className="text-xs font-mono text-gray-400 dark:text-gray-500 flex-shrink-0">
                {commit.hash.substring(0, 7)}
              </span>
            </div>
          </div>
        </div>
        {isExpanded && diff && (
          <div className="bg-gray-50 dark:bg-gray-900">
            <div className="max-h-96 overflow-y-auto p-2">
              <div className="text-xs font-mono text-gray-600 dark:text-gray-400 mb-2">
                {commit.stats}
              </div>
              {diff.split('\n').map((line, index) => renderDiffLine(line, index))}
            </div>
          </div>
        )}
      </div>
    );
  };

  const renderFileItem = (filePath, status) => {
    const isExpanded = expandedFiles.has(filePath);
    const isSelected = selectedFiles.has(filePath);
    const diff = gitDiff[filePath];
    
    return (
      <div key={filePath} className="border-b border-gray-200 dark:border-gray-700 last:border-0">
        <div className={`flex items-center hover:bg-gray-50 dark:hover:bg-gray-800 ${isMobile ? 'px-2 py-1.5' : 'px-3 py-2'}`}>
          <input
            type="checkbox"
            checked={isSelected}
            onChange={() => toggleFileSelected(filePath)}
            onClick={(e) => e.stopPropagation()}
            className={`rounded border-gray-300 dark:border-gray-600 text-blue-600 dark:text-blue-500 focus:ring-blue-500 dark:focus:ring-blue-400 dark:bg-gray-800 dark:checked:bg-blue-600 ${isMobile ? 'mr-1.5' : 'mr-2'}`}
          />
          <div 
            className="flex items-center flex-1 cursor-pointer"
            onClick={() => toggleFileExpanded(filePath)}
          >
            <div className={`p-0.5 hover:bg-gray-200 dark:hover:bg-gray-700 rounded ${isMobile ? 'mr-1' : 'mr-2'}`}>
              <ChevronRight className={`w-3 h-3 transition-transform duration-200 ease-in-out ${isExpanded ? 'rotate-90' : 'rotate-0'}`} />
            </div>
            <span className={`flex-1 truncate ${isMobile ? 'text-xs' : 'text-sm'}`}>{filePath}</span>
            <div className="flex items-center gap-1">
              {(status === 'M' || status === 'D') && (
                <button
                  onClick={(e) => {
                    e.stopPropagation();
                    setConfirmAction({ 
                      type: 'discard', 
                      file: filePath,
                      message: `Discard all changes to "${filePath}"? This action cannot be undone.` 
                    });
                  }}
                  className={`${isMobile ? 'px-2 py-1 text-xs' : 'p-1'} hover:bg-red-100 dark:hover:bg-red-900 rounded text-red-600 dark:text-red-400 font-medium flex items-center gap-1`}
                  title="Discard changes"
                >
                  <Trash2 className={`${isMobile ? 'w-3 h-3' : 'w-3 h-3'}`} />
                  {isMobile && <span>Discard</span>}
                </button>
              )}
              {status === 'U' && (
                <button
                  onClick={(e) => {
                    e.stopPropagation();
                    setConfirmAction({ 
                      type: 'delete', 
                      file: filePath,
                      message: `Delete untracked file "${filePath}"? This action cannot be undone.` 
                    });
                  }}
                  className={`${isMobile ? 'px-2 py-1 text-xs' : 'p-1'} hover:bg-red-100 dark:hover:bg-red-900 rounded text-red-600 dark:text-red-400 font-medium flex items-center gap-1`}
                  title="Delete untracked file"
                >
                  <Trash2 className={`${isMobile ? 'w-3 h-3' : 'w-3 h-3'}`} />
                  {isMobile && <span>Delete</span>}
                </button>
              )}
              <span 
                className={`inline-flex items-center justify-center w-5 h-5 rounded text-xs font-bold border ${
                  status === 'M' ? 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900 dark:text-yellow-300 border-yellow-200 dark:border-yellow-800' :
                  status === 'A' ? 'bg-green-100 text-green-700 dark:bg-green-900 dark:text-green-300 border-green-200 dark:border-green-800' :
                  status === 'D' ? 'bg-red-100 text-red-700 dark:bg-red-900 dark:text-red-300 border-red-200 dark:border-red-800' :
                  'bg-gray-100 text-gray-700 dark:bg-gray-800 dark:text-gray-300 border-gray-300 dark:border-gray-600'
                }`}
                title={getStatusLabel(status)}
              >
                {status}
              </span>
            </div>
          </div>
        </div>
        <div className={`bg-gray-50 dark:bg-gray-900 transition-all duration-400 ease-in-out overflow-hidden ${
          isExpanded && diff 
            ? 'max-h-[600px] opacity-100 translate-y-0' 
            : 'max-h-0 opacity-0 -translate-y-1'
        }`}>
            {/* Operation header */}
            <div className="flex items-center justify-between p-2 border-b border-gray-200 dark:border-gray-700">
              <div className="flex items-center gap-2">
                <span 
                  className={`inline-flex items-center justify-center w-5 h-5 rounded text-xs font-bold border ${
                    status === 'M' ? 'bg-yellow-100 text-yellow-700 dark:bg-yellow-900 dark:text-yellow-300 border-yellow-200 dark:border-yellow-800' :
                    status === 'A' ? 'bg-green-100 text-green-700 dark:bg-green-900 dark:text-green-300 border-green-200 dark:border-green-800' :
                    status === 'D' ? 'bg-red-100 text-red-700 dark:bg-red-900 dark:text-red-300 border-red-200 dark:border-red-800' :
                    'bg-gray-100 text-gray-700 dark:bg-gray-800 dark:text-gray-300 border-gray-300 dark:border-gray-600'
                  }`}
                >
                  {status}
                </span>
                <span className="text-sm font-medium text-gray-900 dark:text-white">
                  {getStatusLabel(status)}
                </span>
              </div>
              {isMobile && (
                <button
                  onClick={(e) => {
                    e.stopPropagation();
                    setWrapText(!wrapText);
                  }}
                  className="text-xs text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white"
                  title={wrapText ? "Switch to horizontal scroll" : "Switch to text wrap"}
                >
                  {wrapText ? '↔️ Scroll' : '↩️ Wrap'}
                </button>
              )}
            </div>
            <div className="max-h-96 overflow-y-auto p-2">
              {diff && diff.split('\n').map((line, index) => renderDiffLine(line, index))}
            </div>
        </div>
      </div>
    );
  };

  if (!selectedProject) {
    return (
      <div className="h-full flex items-center justify-center text-gray-500 dark:text-gray-400">
        <p>Select a project to view source control</p>
      </div>
    );
  }

  return (
    <div className="h-full flex flex-col bg-white dark:bg-gray-900">
      {/* Header */}
      <div className={`flex items-center justify-between border-b border-gray-200 dark:border-gray-700 ${isMobile ? 'px-3 py-2' : 'px-4 py-3'}`}>
        <div className="relative" ref={dropdownRef}>
          <button
            onClick={() => setShowBranchDropdown(!showBranchDropdown)}
            className={`flex items-center hover:bg-gray-100 dark:hover:bg-gray-800 rounded-md transition-colors ${isMobile ? 'space-x-1 px-2 py-1' : 'space-x-2 px-3 py-1.5'}`}
          >
            <GitBranch className={`text-gray-600 dark:text-gray-400 ${isMobile ? 'w-3 h-3' : 'w-4 h-4'}`} />
            <div className="flex items-center gap-1">
              <span className={`font-medium ${isMobile ? 'text-xs' : 'text-sm'}`}>{currentBranch}</span>
              {/* Remote status indicators */}
              {remoteStatus?.hasRemote && (
                <div className="flex items-center gap-1 text-xs">
                  {remoteStatus.ahead > 0 && (
                    <span className="text-green-600 dark:text-green-400" title={`${remoteStatus.ahead} commit${remoteStatus.ahead !== 1 ? 's' : ''} ahead`}>
                      ↑{remoteStatus.ahead}
                    </span>
                  )}
                  {remoteStatus.behind > 0 && (
                    <span className="text-blue-600 dark:text-blue-400" title={`${remoteStatus.behind} commit${remoteStatus.behind !== 1 ? 's' : ''} behind`}>
                      ↓{remoteStatus.behind}
                    </span>
                  )}
                  {remoteStatus.isUpToDate && (
                    <span className="text-gray-500 dark:text-gray-400" title="Up to date with remote">
                      ✓
                    </span>
                  )}
                </div>
              )}
            </div>
            <ChevronDown className={`w-3 h-3 text-gray-500 transition-transform ${showBranchDropdown ? 'rotate-180' : ''}`} />
          </button>
          
          {/* Branch Dropdown */}
          {showBranchDropdown && (
            <div className="absolute top-full left-0 mt-1 w-64 bg-white dark:bg-gray-800 rounded-lg shadow-lg border border-gray-200 dark:border-gray-700 z-50">
              <div className="py-1 max-h-64 overflow-y-auto">
                {branches.map(branch => (
                  <button
                    key={branch}
                    onClick={() => switchBranch(branch)}
                    className={`w-full text-left px-4 py-2 text-sm hover:bg-gray-100 dark:hover:bg-gray-700 ${
                      branch === currentBranch ? 'bg-gray-50 dark:bg-gray-700 text-gray-900 dark:text-gray-100' : 'text-gray-700 dark:text-gray-300'
                    }`}
                  >
                    <div className="flex items-center space-x-2">
                      {branch === currentBranch && <Check className="w-3 h-3 text-green-600 dark:text-green-400" />}
                      <span className={branch === currentBranch ? 'font-medium' : ''}>{branch}</span>
                    </div>
                  </button>
                ))}
              </div>
              <div className="border-t border-gray-200 dark:border-gray-700 py-1">
                <button
                  onClick={() => {
                    setShowNewBranchModal(true);
                    setShowBranchDropdown(false);
                  }}
                  className="w-full text-left px-4 py-2 text-sm hover:bg-gray-100 dark:hover:bg-gray-700 flex items-center space-x-2"
                >
                  <Plus className="w-3 h-3" />
                  <span>Create new branch</span>
                </button>
              </div>
            </div>
          )}
        </div>
        
        <div className={`flex items-center ${isMobile ? 'gap-1' : 'gap-2'}`}>
          {/* Remote action buttons - smart logic based on ahead/behind status */}
          {remoteStatus?.hasRemote && (
            <>
              {/* Publish button - show when branch doesn't exist on remote */}
              {!remoteStatus?.hasUpstream && (
                <button
                  onClick={() => setConfirmAction({ 
                    type: 'publish', 
                    message: `Publish branch "${currentBranch}" to ${remoteStatus.remoteName}?` 
                  })}
                  disabled={isPublishing}
                  className="px-2 py-1 text-xs bg-purple-600 text-white rounded hover:bg-purple-700 disabled:opacity-50 flex items-center gap-1"
                  title={`Publish branch "${currentBranch}" to ${remoteStatus.remoteName}`}
                >
                  <Upload className={`w-3 h-3 ${isPublishing ? 'animate-pulse' : ''}`} />
                  <span>{isPublishing ? 'Publishing...' : 'Publish'}</span>
                </button>
              )}
              
              {/* Show normal push/pull buttons only if branch has upstream */}
              {remoteStatus?.hasUpstream && !remoteStatus?.isUpToDate && (
                <>
                  {/* Pull button - show when behind (primary action) */}
                  {remoteStatus.behind > 0 && (
                    <button
                      onClick={() => setConfirmAction({ 
                        type: 'pull', 
                        message: `Pull ${remoteStatus.behind} commit${remoteStatus.behind !== 1 ? 's' : ''} from ${remoteStatus.remoteName}?` 
                      })}
                      disabled={isPulling}
                      className="px-2 py-1 text-xs bg-green-600 text-white rounded hover:bg-green-700 disabled:opacity-50 flex items-center gap-1"
                      title={`Pull ${remoteStatus.behind} commit${remoteStatus.behind !== 1 ? 's' : ''} from ${remoteStatus.remoteName}`}
                    >
                      <Download className={`w-3 h-3 ${isPulling ? 'animate-pulse' : ''}`} />
                      <span>{isPulling ? 'Pulling...' : `Pull ${remoteStatus.behind}`}</span>
                    </button>
                  )}
                  
                  {/* Push button - show when ahead (primary action when ahead only) */}
                  {remoteStatus.ahead > 0 && (
                    <button
                      onClick={() => setConfirmAction({ 
                        type: 'push', 
                        message: `Push ${remoteStatus.ahead} commit${remoteStatus.ahead !== 1 ? 's' : ''} to ${remoteStatus.remoteName}?` 
                      })}
                      disabled={isPushing}
                      className="px-2 py-1 text-xs bg-orange-600 text-white rounded hover:bg-orange-700 disabled:opacity-50 flex items-center gap-1"
                      title={`Push ${remoteStatus.ahead} commit${remoteStatus.ahead !== 1 ? 's' : ''} to ${remoteStatus.remoteName}`}
                    >
                      <Upload className={`w-3 h-3 ${isPushing ? 'animate-pulse' : ''}`} />
                      <span>{isPushing ? 'Pushing...' : `Push ${remoteStatus.ahead}`}</span>
                    </button>
                  )}
                  
                  {/* Fetch button - show when ahead only or when diverged (secondary action) */}
                  {(remoteStatus.ahead > 0 || (remoteStatus.behind > 0 && remoteStatus.ahead > 0)) && (
                    <button
                      onClick={handleFetch}
                      disabled={isFetching}
                      className="px-2 py-1 text-xs bg-blue-600 text-white rounded hover:bg-blue-700 disabled:opacity-50 flex items-center gap-1"
                      title={`Fetch from ${remoteStatus.remoteName}`}
                    >
                      <RefreshCw className={`w-3 h-3 ${isFetching ? 'animate-spin' : ''}`} />
                      <span>{isFetching ? 'Fetching...' : 'Fetch'}</span>
                    </button>
                  )}
                </>
              )}
            </>
          )}
          
          <button
            onClick={() => {
              fetchGitStatus();
              fetchBranches();
              fetchRemoteStatus();
            }}
            disabled={isLoading}
            className={`hover:bg-gray-100 dark:hover:bg-gray-800 rounded ${isMobile ? 'p-1' : 'p-1.5'}`}
          >
            <RefreshCw className={`${isLoading ? 'animate-spin' : ''} ${isMobile ? 'w-3 h-3' : 'w-4 h-4'}`} />
          </button>
        </div>
      </div>

      {/* Git Repository Not Found Message */}
      {gitStatus?.error ? (
        <div className="flex-1 flex flex-col items-center justify-center text-gray-500 dark:text-gray-400 px-6 py-12">
          <GitBranch className="w-20 h-20 mb-6 opacity-30" />
          <h3 className="text-xl font-medium mb-3 text-center">{gitStatus.error}</h3>
          {gitStatus.details && (
            <p className="text-sm text-center leading-relaxed mb-6 max-w-md">{gitStatus.details}</p>
          )}
          <div className="p-4 bg-blue-50 dark:bg-blue-900/20 rounded-lg border border-blue-200 dark:border-blue-800 max-w-md">
            <p className="text-sm text-blue-700 dark:text-blue-300 text-center">
              <strong>Tip:</strong> Run <code className="bg-blue-100 dark:bg-blue-900 px-2 py-1 rounded font-mono text-xs">git init</code> in your project directory to initialize git source control.
            </p>
          </div>
        </div>
      ) : (
        <>
          {/* Tab Navigation - Only show when git is available and no files expanded */}
          <div className={`flex border-b border-gray-200 dark:border-gray-700 transition-all duration-300 ease-in-out ${
            expandedFiles.size === 0 
              ? 'max-h-16 opacity-100 translate-y-0' 
              : 'max-h-0 opacity-0 -translate-y-2 overflow-hidden'
          }`}>
            <button
              onClick={() => setActiveView('changes')}
              className={`flex-1 px-4 py-2 text-sm font-medium transition-colors ${
                activeView === 'changes'
                  ? 'text-blue-600 dark:text-blue-400 border-b-2 border-blue-600 dark:border-blue-400'
                  : 'text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white'
              }`}
            >
              <div className="flex items-center justify-center gap-2">
                <FileText className="w-4 h-4" />
                <span>Changes</span>
              </div>
            </button>
            <button
              onClick={() => setActiveView('history')}
              className={`flex-1 px-4 py-2 text-sm font-medium transition-colors ${
                activeView === 'history'
                  ? 'text-blue-600 dark:text-blue-400 border-b-2 border-blue-600 dark:border-blue-400'
                  : 'text-gray-600 dark:text-gray-400 hover:text-gray-900 dark:hover:text-white'
              }`}
            >
              <div className="flex items-center justify-center gap-2">
                <History className="w-4 h-4" />
                <span>History</span>
              </div>
            </button>
          </div>

          {/* Changes View */}
          {activeView === 'changes' && (
            <>
              {/* Mobile Commit Toggle Button / Desktop Always Visible - Hide when files expanded */}
              <div className={`transition-all duration-300 ease-in-out ${
                expandedFiles.size === 0 
                  ? 'max-h-96 opacity-100 translate-y-0' 
                  : 'max-h-0 opacity-0 -translate-y-2 overflow-hidden'
              }`}>
                {isMobile && isCommitAreaCollapsed ? (
                  <div className="px-4 py-2 border-b border-gray-200 dark:border-gray-700">
                      <button
                        onClick={() => setIsCommitAreaCollapsed(false)}
                        className="w-full flex items-center justify-center gap-2 px-3 py-2 text-sm bg-blue-600 text-white rounded-md hover:bg-blue-700"
                      >
                        <GitCommit className="w-4 h-4" />
                        <span>Commit {selectedFiles.size} file{selectedFiles.size !== 1 ? 's' : ''}</span>
                        <ChevronDown className="w-3 h-3" />
                      </button>
                    </div>
                  ) : (
                <>
                  {/* Commit Message Input */}
                  <div className="px-4 py-3 border-b border-gray-200 dark:border-gray-700">
                    {/* Mobile collapse button */}
                    {isMobile && (
                      <div className="flex items-center justify-between mb-2">
                        <span className="text-sm font-medium">Commit Changes</span>
                        <button
                          onClick={() => setIsCommitAreaCollapsed(true)}
                          className="p-1 hover:bg-gray-100 dark:hover:bg-gray-800 rounded"
                        >
                          <ChevronDown className="w-4 h-4 rotate-180" />
                        </button>
                      </div>
                    )}
                    
                    <div className="relative">
                      <textarea
                        ref={textareaRef}
                        value={commitMessage}
                        onChange={(e) => setCommitMessage(e.target.value)}
                        placeholder="Message (Ctrl+Enter to commit)"
                        className="w-full px-3 py-2 text-sm border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-800 resize-none pr-20"
                        rows="3"
                        onKeyDown={(e) => {
                          if (e.key === 'Enter' && (e.ctrlKey || e.metaKey)) {
                            handleCommit();
                          }
                        }}
                      />
                      <div className="absolute right-2 top-2 flex gap-1">
                        <button
                          onClick={generateCommitMessage}
                          disabled={selectedFiles.size === 0 || isGeneratingMessage}
                          className="p-1.5 text-gray-500 hover:text-gray-700 dark:text-gray-400 dark:hover:text-gray-200 disabled:opacity-50 disabled:cursor-not-allowed"
                          title="Generate commit message"
                        >
                          {isGeneratingMessage ? (
                            <RefreshCw className="w-4 h-4 animate-spin" />
                          ) : (
                            <Sparkles className="w-4 h-4" />
                          )}
                        </button>
                        <div style={{ display: 'none' }}>
                          <MicButton
                            onTranscript={(transcript) => setCommitMessage(transcript)}
                            mode="default"
                            className="p-1.5"
                          />
                        </div>
                      </div>
                    </div>
                    <div className="flex items-center justify-between mt-2">
                      <span className="text-xs text-gray-500">
                        {selectedFiles.size} file{selectedFiles.size !== 1 ? 's' : ''} selected
                      </span>
                      <button
                        onClick={() => setConfirmAction({ 
                          type: 'commit', 
                          message: `Commit ${selectedFiles.size} file${selectedFiles.size !== 1 ? 's' : ''} with message: "${commitMessage.trim()}"?` 
                        })}
                        disabled={!commitMessage.trim() || selectedFiles.size === 0 || isCommitting}
                        className="px-3 py-1 text-sm bg-blue-600 text-white rounded-md hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed flex items-center space-x-1"
                      >
                        <Check className="w-3 h-3" />
                        <span>{isCommitting ? 'Committing...' : 'Commit'}</span>
                      </button>
                    </div>
                  </div>
                  </>
                  )}
              </div>
            </>
          )}

          {/* File Selection Controls - Only show in changes view and when git is working and no files expanded */}
          {activeView === 'changes' && gitStatus && !gitStatus.error && (
            <div className={`border-b border-gray-200 dark:border-gray-700 flex items-center justify-between transition-all duration-300 ease-in-out ${isMobile ? 'px-3 py-1.5' : 'px-4 py-2'} ${
              expandedFiles.size === 0 
                ? 'max-h-16 opacity-100 translate-y-0' 
                : 'max-h-0 opacity-0 -translate-y-2 overflow-hidden'
            }`}>
              <span className={`text-gray-600 dark:text-gray-400 ${isMobile ? 'text-xs' : 'text-xs'}`}>
                {selectedFiles.size} of {(gitStatus?.modified?.length || 0) + (gitStatus?.added?.length || 0) + (gitStatus?.deleted?.length || 0) + (gitStatus?.untracked?.length || 0)} {isMobile ? '' : 'files'} selected
              </span>
              <div className={`flex ${isMobile ? 'gap-1' : 'gap-2'}`}>
                <button
                  onClick={() => {
                    const allFiles = new Set([
                      ...(gitStatus?.modified || []),
                      ...(gitStatus?.added || []),
                      ...(gitStatus?.deleted || []),
                      ...(gitStatus?.untracked || [])
                    ]);
                    setSelectedFiles(allFiles);
                  }}
                  className={`text-blue-600 dark:text-blue-400 hover:text-blue-700 dark:hover:text-blue-300 ${isMobile ? 'text-xs' : 'text-xs'}`}
                >
                  {isMobile ? 'All' : 'Select All'}
                </button>
                <span className="text-gray-300 dark:text-gray-600">|</span>
                <button
                  onClick={() => setSelectedFiles(new Set())}
                  className={`text-blue-600 dark:text-blue-400 hover:text-blue-700 dark:hover:text-blue-300 ${isMobile ? 'text-xs' : 'text-xs'}`}
                >
                  {isMobile ? 'None' : 'Deselect All'}
                </button>
              </div>
            </div>
          )}

          {/* Status Legend Toggle - Hide on mobile by default */}
          {!gitStatus?.error && !isMobile && (
            <div className="border-b border-gray-200 dark:border-gray-700">
              <button
                onClick={() => setShowLegend(!showLegend)}
                className="w-full px-4 py-2 bg-gray-50 dark:bg-gray-800 hover:bg-gray-100 dark:hover:bg-gray-750 text-xs text-gray-600 dark:text-gray-400 flex items-center justify-center gap-1"
              >
                <Info className="w-3 h-3" />
                <span>File Status Guide</span>
                {showLegend ? <ChevronDown className="w-3 h-3" /> : <ChevronRight className="w-3 h-3" />}
              </button>
              
              {showLegend && (
                <div className="px-4 py-3 bg-gray-50 dark:bg-gray-800 text-xs">
                  <div className={`${isMobile ? 'grid grid-cols-2 gap-3 justify-items-center' : 'flex justify-center gap-6'}`}>
                    <div className="flex items-center gap-2">
                      <span className="inline-flex items-center justify-center w-5 h-5 bg-yellow-100 text-yellow-700 dark:bg-yellow-900 dark:text-yellow-300 rounded border border-yellow-200 dark:border-yellow-800 font-bold text-xs">
                        M
                      </span>
                      <span className="text-gray-600 dark:text-gray-400 italic">Modified</span>
                    </div>
                    <div className="flex items-center gap-2">
                      <span className="inline-flex items-center justify-center w-5 h-5 bg-green-100 text-green-700 dark:bg-green-900 dark:text-green-300 rounded border border-green-200 dark:border-green-800 font-bold text-xs">
                        A
                      </span>
                      <span className="text-gray-600 dark:text-gray-400 italic">Added</span>
                    </div>
                    <div className="flex items-center gap-2">
                      <span className="inline-flex items-center justify-center w-5 h-5 bg-red-100 text-red-700 dark:bg-red-900 dark:text-red-300 rounded border border-red-200 dark:border-red-800 font-bold text-xs">
                        D
                      </span>
                      <span className="text-gray-600 dark:text-gray-400 italic">Deleted</span>
                    </div>
                    <div className="flex items-center gap-2">
                      <span className="inline-flex items-center justify-center w-5 h-5 bg-gray-100 text-gray-700 dark:bg-gray-800 dark:text-gray-300 rounded border border-gray-300 dark:border-gray-600 font-bold text-xs">
                        U
                      </span>
                      <span className="text-gray-600 dark:text-gray-400 italic">Untracked</span>
                    </div>
                  </div>
                </div>
              )}
            </div>
          )}
        </>
      )}

      {/* File List - Changes View - Only show when git is available */}
      {activeView === 'changes' && !gitStatus?.error && (
        <div className={`flex-1 overflow-y-auto ${isMobile ? 'pb-20' : ''}`}>
          {isLoading ? (
            <div className="flex items-center justify-center h-32">
              <RefreshCw className="w-6 h-6 animate-spin text-gray-400" />
            </div>
          ) : !gitStatus || (!gitStatus.modified?.length && !gitStatus.added?.length && !gitStatus.deleted?.length && !gitStatus.untracked?.length) ? (
            <div className="flex flex-col items-center justify-center h-32 text-gray-500 dark:text-gray-400">
              <GitCommit className="w-12 h-12 mb-2 opacity-50" />
              <p className="text-sm">No changes detected</p>
            </div>
          ) : (
            <div className={isMobile ? 'pb-4' : ''}>
              {gitStatus.modified?.map(file => renderFileItem(file, 'M'))}
              {gitStatus.added?.map(file => renderFileItem(file, 'A'))}
              {gitStatus.deleted?.map(file => renderFileItem(file, 'D'))}
              {gitStatus.untracked?.map(file => renderFileItem(file, 'U'))}
            </div>
          )}
        </div>
      )}

      {/* History View - Only show when git is available */}
      {activeView === 'history' && !gitStatus?.error && (
        <div className={`flex-1 overflow-y-auto ${isMobile ? 'pb-20' : ''}`}>
          {isLoading ? (
            <div className="flex items-center justify-center h-32">
              <RefreshCw className="w-6 h-6 animate-spin text-gray-400" />
            </div>
          ) : recentCommits.length === 0 ? (
            <div className="flex flex-col items-center justify-center h-32 text-gray-500 dark:text-gray-400">
              <History className="w-12 h-12 mb-2 opacity-50" />
              <p className="text-sm">No commits found</p>
            </div>
          ) : (
            <div className={isMobile ? 'pb-4' : ''}>
              {recentCommits.map(commit => renderCommitItem(commit))}
            </div>
          )}
        </div>
      )}

      {/* New Branch Modal */}
      {showNewBranchModal && (
        <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
          <div className="fixed inset-0 bg-black bg-opacity-50" onClick={() => setShowNewBranchModal(false)} />
          <div className="relative bg-white dark:bg-gray-800 rounded-lg shadow-xl max-w-md w-full">
            <div className="p-6">
              <h3 className="text-lg font-semibold mb-4">Create New Branch</h3>
              <div className="mb-4">
                <label className="block text-sm font-medium text-gray-700 dark:text-gray-300 mb-2">
                  Branch Name
                </label>
                <input
                  type="text"
                  value={newBranchName}
                  onChange={(e) => setNewBranchName(e.target.value)}
                  onKeyDown={(e) => {
                    if (e.key === 'Enter' && !isCreatingBranch) {
                      createBranch();
                    }
                  }}
                  placeholder="feature/new-feature"
                  className="w-full px-3 py-2 border border-gray-300 dark:border-gray-600 rounded-md bg-white dark:bg-gray-700 focus:outline-none focus:ring-2 focus:ring-blue-500"
                  autoFocus
                />
              </div>
              <div className="text-xs text-gray-500 dark:text-gray-400 mb-4">
                This will create a new branch from the current branch ({currentBranch})
              </div>
              <div className="flex justify-end space-x-3">
                <button
                  onClick={() => {
                    setShowNewBranchModal(false);
                    setNewBranchName('');
                  }}
                  className="px-4 py-2 text-sm text-gray-700 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-700 rounded-md"
                >
                  Cancel
                </button>
                <button
                  onClick={createBranch}
                  disabled={!newBranchName.trim() || isCreatingBranch}
                  className="px-4 py-2 text-sm bg-blue-600 text-white rounded-md hover:bg-blue-700 disabled:opacity-50 disabled:cursor-not-allowed flex items-center space-x-2"
                >
                  {isCreatingBranch ? (
                    <>
                      <RefreshCw className="w-3 h-3 animate-spin" />
                      <span>Creating...</span>
                    </>
                  ) : (
                    <>
                      <Plus className="w-3 h-3" />
                      <span>Create Branch</span>
                    </>
                  )}
                </button>
              </div>
            </div>
          </div>
        </div>
      )}

      {/* Confirmation Modal */}
      {confirmAction && (
        <div className="fixed inset-0 z-50 flex items-center justify-center p-4">
          <div className="fixed inset-0 bg-black bg-opacity-50" onClick={() => setConfirmAction(null)} />
          <div className="relative bg-white dark:bg-gray-800 rounded-lg shadow-xl max-w-md w-full">
            <div className="p-6">
              <div className="flex items-center mb-4">
                <div className={`p-2 rounded-full mr-3 ${
                  (confirmAction.type === 'discard' || confirmAction.type === 'delete') ? 'bg-red-100 dark:bg-red-900' : 'bg-yellow-100 dark:bg-yellow-900'
                }`}>
                  <AlertTriangle className={`w-5 h-5 ${
                    (confirmAction.type === 'discard' || confirmAction.type === 'delete') ? 'text-red-600 dark:text-red-400' : 'text-yellow-600 dark:text-yellow-400'
                  }`} />
                </div>
                <h3 className="text-lg font-semibold">
                  {confirmAction.type === 'discard' ? 'Discard Changes' : 
                   confirmAction.type === 'delete' ? 'Delete File' :
                   confirmAction.type === 'commit' ? 'Confirm Commit' : 
                   confirmAction.type === 'pull' ? 'Confirm Pull' : 
                   confirmAction.type === 'publish' ? 'Publish Branch' : 'Confirm Push'}
                </h3>
              </div>
              
              <p className="text-sm text-gray-600 dark:text-gray-400 mb-6">
                {confirmAction.message}
              </p>
              
              <div className="flex justify-end space-x-3">
                <button
                  onClick={() => setConfirmAction(null)}
                  className="px-4 py-2 text-sm text-gray-700 dark:text-gray-300 hover:bg-gray-100 dark:hover:bg-gray-700 rounded-md"
                >
                  Cancel
                </button>
                <button
                  onClick={confirmAndExecute}
                  className={`px-4 py-2 text-sm text-white rounded-md ${
                    (confirmAction.type === 'discard' || confirmAction.type === 'delete')
                      ? 'bg-red-600 hover:bg-red-700' 
                      : confirmAction.type === 'commit'
                      ? 'bg-blue-600 hover:bg-blue-700'
                      : confirmAction.type === 'pull'
                      ? 'bg-green-600 hover:bg-green-700'
                      : confirmAction.type === 'publish'
                      ? 'bg-purple-600 hover:bg-purple-700'
                      : 'bg-orange-600 hover:bg-orange-700'
                  } flex items-center space-x-2`}
                >
                  {confirmAction.type === 'discard' ? (
                    <>
                      <Trash2 className="w-4 h-4" />
                      <span>Discard</span>
                    </>
                  ) : confirmAction.type === 'delete' ? (
                    <>
                      <Trash2 className="w-4 h-4" />
                      <span>Delete</span>
                    </>
                  ) : confirmAction.type === 'commit' ? (
                    <>
                      <Check className="w-4 h-4" />
                      <span>Commit</span>
                    </>
                  ) : confirmAction.type === 'pull' ? (
                    <>
                      <Download className="w-4 h-4" />
                      <span>Pull</span>
                    </>
                  ) : confirmAction.type === 'publish' ? (
                    <>
                      <Upload className="w-4 h-4" />
                      <span>Publish</span>
                    </>
                  ) : (
                    <>
                      <Upload className="w-4 h-4" />
                      <span>Push</span>
                    </>
                  )}
                </button>
              </div>
            </div>
          </div>
        </div>
      )}
    </div>
  );
}

export default GitPanel;