import type { IProviderModels } from '@/shared/interfaces.js';
import type {
  ProviderChangeActiveModelInput,
  ProviderCurrentActiveModel,
  ProviderModelsDefinition,
  ProviderSessionActiveModelChange,
} from '@/shared/types.js';
import {
  buildDefaultProviderCurrentActiveModel,
  writeProviderSessionActiveModelChange,
} from '@/shared/utils.js';

export const GEMINI_FALLBACK_MODELS: ProviderModelsDefinition = {
  OPTIONS: [
    { value: 'gemini-3-flash-preview', label: 'Gemini 3 Flash Preview' },
    { value: 'gemini-3.1-flash-lite-preview', label: 'Gemini 3.1 Flash Lite Preview' },
    { value: 'gemini-2.5-flash', label: 'Gemini 2.5 Flash' },
    { value: 'gemini-2.5-flash-lite', label: 'Gemini 2.5 Flash Lite' },
    { value: 'gemma-4-31b-it', label: 'Gemma 4 31B IT' },
    { value: 'gemma-4-26b-a4b-it', label: 'Gemma 4 26B A4B IT' },
  ],
  DEFAULT: 'gemini-3-flash-preview',
};

export class GeminiProviderModels implements IProviderModels {
  async getSupportedModels(): Promise<ProviderModelsDefinition> {
    return GEMINI_FALLBACK_MODELS;
  }

  async getCurrentActiveModel(): Promise<ProviderCurrentActiveModel> {
    return buildDefaultProviderCurrentActiveModel(GEMINI_FALLBACK_MODELS);
  }

  async changeActiveModel(
    input: ProviderChangeActiveModelInput,
  ): Promise<ProviderSessionActiveModelChange> {
    return writeProviderSessionActiveModelChange('gemini', input);
  }
}