// Copyright 2015 go-swagger maintainers
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//    http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package validate

import (
	"encoding/json"
	"fmt"
	"testing"

	"github.com/go-openapi/errors"
	"github.com/go-openapi/spec"
	"github.com/go-openapi/strfmt"
	"github.com/stretchr/testify/assert"
)

type email struct {
	Address string
}

type paramFactory func(string) *spec.Parameter

var paramFactories = []paramFactory{
	spec.QueryParam,
	spec.HeaderParam,
	spec.PathParam,
	spec.FormDataParam,
}

var stringItems = new(spec.Items)

func init() {
	stringItems.Type = "string"
}

func requiredError(param *spec.Parameter) *errors.Validation {
	return errors.Required(param.Name, param.In)
}

func maxErrorItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.ExceedsMaximum(path, in, *items.Maximum, items.ExclusiveMaximum)
}

func minErrorItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.ExceedsMinimum(path, in, *items.Minimum, items.ExclusiveMinimum)
}

func multipleOfErrorItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.NotMultipleOf(path, in, *items.MultipleOf)
}

func requiredErrorItems(path, in string) *errors.Validation {
	return errors.Required(path, in)
}

func maxLengthErrorItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.TooLong(path, in, *items.MaxLength)
}

func minLengthErrorItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.TooShort(path, in, *items.MinLength)
}

func patternFailItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.FailedPattern(path, in, items.Pattern)
}

func enumFailItems(path, in string, items *spec.Items, data interface{}) *errors.Validation {
	return errors.EnumFail(path, in, data, items.Enum)
}

func minItemsErrorItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.TooFewItems(path, in, *items.MinItems)
}

func maxItemsErrorItems(path, in string, items *spec.Items) *errors.Validation {
	return errors.TooManyItems(path, in, *items.MaxItems)
}

func duplicatesErrorItems(path, in string) *errors.Validation {
	return errors.DuplicateItems(path, in)
}

func TestNumberItemsValidation(t *testing.T) {

	values := [][]interface{}{
		[]interface{}{23, 49, 56, 21, 14, 35, 28, 7, 42},
		[]interface{}{uint(23), uint(49), uint(56), uint(21), uint(14), uint(35), uint(28), uint(7), uint(42)},
		[]interface{}{float64(23), float64(49), float64(56), float64(21), float64(14), float64(35), float64(28), float64(7), float64(42)},
	}

	for i, v := range values {
		items := spec.NewItems()
		items.WithMaximum(makeFloat(v[1]), false)
		items.WithMinimum(makeFloat(v[3]), false)
		items.WithMultipleOf(makeFloat(v[7]))
		items.WithEnum(v[3], v[6], v[8], v[1])
		items.Typed("integer", "int32")
		parent := spec.QueryParam("factors").CollectionOf(items, "")
		path := fmt.Sprintf("factors.%d", i)
		validator := newItemsValidator(parent.Name, parent.In, items, parent, strfmt.Default)

		// MultipleOf
		err := validator.Validate(i, v[0])
		assert.True(t, err.HasErrors())
		assert.EqualError(t, multipleOfErrorItems(path, validator.in, items), err.Errors[0].Error())

		// Maximum
		err = validator.Validate(i, v[1])
		assert.True(t, err == nil || err.IsValid())
		err = validator.Validate(i, v[2])
		assert.True(t, err.HasErrors())
		assert.EqualError(t, maxErrorItems(path, validator.in, items), err.Errors[0].Error())

		// ExclusiveMaximum
		items.ExclusiveMaximum = true
		// requires a new items validator because this is set a creation time
		validator = newItemsValidator(parent.Name, parent.In, items, parent, strfmt.Default)
		err = validator.Validate(i, v[1])
		assert.True(t, err.HasErrors())
		assert.EqualError(t, maxErrorItems(path, validator.in, items), err.Errors[0].Error())

		// Minimum
		err = validator.Validate(i, v[3])
		assert.True(t, err == nil || err.IsValid())
		err = validator.Validate(i, v[4])
		assert.True(t, err.HasErrors())
		assert.EqualError(t, minErrorItems(path, validator.in, items), err.Errors[0].Error())

		// ExclusiveMinimum
		items.ExclusiveMinimum = true
		// requires a new items validator because this is set a creation time
		validator = newItemsValidator(parent.Name, parent.In, items, parent, strfmt.Default)
		err = validator.Validate(i, v[3])
		assert.True(t, err.HasErrors())
		assert.EqualError(t, minErrorItems(path, validator.in, items), err.Errors[0].Error())

		// Enum
		err = validator.Validate(i, v[5])
		assert.True(t, err.HasErrors())
		assert.EqualError(t, enumFailItems(path, validator.in, items, v[5]), err.Errors[0].Error())

		// Valid passes
		err = validator.Validate(i, v[6])
		assert.True(t, err == nil || err.IsValid())
	}

}

func TestStringItemsValidation(t *testing.T) {
	items := spec.NewItems().WithMinLength(3).WithMaxLength(5).WithPattern(`^[a-z]+$`).Typed("string", "")
	items.WithEnum("aaa", "bbb", "ccc")
	parent := spec.QueryParam("tags").CollectionOf(items, "")
	path := parent.Name + ".1"
	validator := newItemsValidator(parent.Name, parent.In, items, parent, strfmt.Default)

	// required
	err := validator.Validate(1, "")
	assert.True(t, err.HasErrors())
	assert.EqualError(t, minLengthErrorItems(path, validator.in, items), err.Errors[0].Error())

	// MaxLength
	err = validator.Validate(1, "abcdef")
	assert.True(t, err.HasErrors())
	assert.EqualError(t, maxLengthErrorItems(path, validator.in, items), err.Errors[0].Error())

	// MinLength
	err = validator.Validate(1, "a")
	assert.True(t, err.HasErrors())
	assert.EqualError(t, minLengthErrorItems(path, validator.in, items), err.Errors[0].Error())

	// Pattern
	err = validator.Validate(1, "a394")
	assert.True(t, err.HasErrors())
	assert.EqualError(t, patternFailItems(path, validator.in, items), err.Errors[0].Error())

	// Enum
	err = validator.Validate(1, "abcde")
	assert.True(t, err.HasErrors())
	assert.EqualError(t, enumFailItems(path, validator.in, items, "abcde"), err.Errors[0].Error())

	// Valid passes
	err = validator.Validate(1, "bbb")
	assert.True(t, err == nil || err.IsValid())
}

func TestArrayItemsValidation(t *testing.T) {
	items := spec.NewItems().CollectionOf(stringItems, "").WithMinItems(1).WithMaxItems(5).UniqueValues()
	items.WithEnum("aaa", "bbb", "ccc")
	parent := spec.QueryParam("tags").CollectionOf(items, "")
	path := parent.Name + ".1"
	validator := newItemsValidator(parent.Name, parent.In, items, parent, strfmt.Default)

	// MinItems
	err := validator.Validate(1, []string{})
	assert.True(t, err.HasErrors())
	assert.EqualError(t, minItemsErrorItems(path, validator.in, items), err.Errors[0].Error())
	// MaxItems
	err = validator.Validate(1, []string{"a", "b", "c", "d", "e", "f"})
	assert.True(t, err.HasErrors())
	assert.EqualError(t, maxItemsErrorItems(path, validator.in, items), err.Errors[0].Error())
	// UniqueItems
	err = validator.Validate(1, []string{"a", "a"})
	assert.True(t, err.HasErrors())
	assert.EqualError(t, duplicatesErrorItems(path, validator.in), err.Errors[0].Error())

	// Enum
	err = validator.Validate(1, []string{"a", "b", "c"})
	assert.True(t, err.HasErrors())
	assert.EqualError(t, enumFailItems(path, validator.in, items, []string{"a", "b", "c"}), err.Errors[0].Error())

	// Items
	strItems := spec.NewItems().WithMinLength(3).WithMaxLength(5).WithPattern(`^[a-z]+$`).Typed("string", "")
	items = spec.NewItems().CollectionOf(strItems, "").WithMinItems(1).WithMaxItems(5).UniqueValues()
	validator = newItemsValidator(parent.Name, parent.In, items, parent, strfmt.Default)

	err = validator.Validate(1, []string{"aa", "bbb", "ccc"})
	assert.True(t, err.HasErrors())
	assert.EqualError(t, minLengthErrorItems(path+".0", parent.In, strItems), err.Errors[0].Error())
}

// PetStoreJSONMessage json raw message for Petstore20
var PetStoreJSONMessage = json.RawMessage([]byte(PetStore20))

// PetStore20 json doc for swagger 2.0 pet store
const PetStore20 = `{
  "swagger": "2.0",
  "info": {
    "version": "1.0.0",
    "title": "Swagger Petstore",
    "contact": {
      "name": "Wordnik API Team",
      "url": "http://developer.wordnik.com"
    },
    "license": {
      "name": "Creative Commons 4.0 International",
      "url": "http://creativecommons.org/licenses/by/4.0/"
    }
  },
  "host": "petstore.swagger.wordnik.com",
  "basePath": "/api",
  "schemes": [
    "http"
  ],
  "paths": {
    "/pets": {
      "get": {
        "security": [
          {
            "basic": []
          }
        ],
        "tags": [ "Pet Operations" ],
        "operationId": "getAllPets",
        "parameters": [
          {
            "name": "status",
            "in": "query",
            "description": "The status to filter by",
            "type": "string"
          },
          {
            "name": "limit",
            "in": "query",
            "description": "The maximum number of results to return",
            "type": "integer",
						"format": "int64"
          }
        ],
        "summary": "Finds all pets in the system",
        "responses": {
          "200": {
            "description": "Pet response",
            "schema": {
              "type": "array",
              "items": {
                "$ref": "#/definitions/Pet"
              }
            }
          },
          "default": {
            "description": "Unexpected error",
            "schema": {
              "$ref": "#/definitions/Error"
            }
          }
        }
      },
      "post": {
        "security": [
          {
            "basic": []
          }
        ],
        "tags": [ "Pet Operations" ],
        "operationId": "createPet",
        "summary": "Creates a new pet",
        "consumes": ["application/x-yaml"],
        "produces": ["application/x-yaml"],
        "parameters": [
          {
            "name": "pet",
            "in": "body",
            "description": "The Pet to create",
            "required": true,
            "schema": {
              "$ref": "#/definitions/newPet"
            }
          }
        ],
        "responses": {
          "200": {
            "description": "Created Pet response",
            "schema": {
              "$ref": "#/definitions/Pet"
            }
          },
          "default": {
            "description": "Unexpected error",
            "schema": {
              "$ref": "#/definitions/Error"
            }
          }
        }
      }
    },
    "/pets/{id}": {
      "delete": {
        "security": [
          {
            "apiKey": []
          }
        ],
        "description": "Deletes the Pet by id",
        "operationId": "deletePet",
        "parameters": [
          {
            "name": "id",
            "in": "path",
            "description": "ID of pet to delete",
            "required": true,
            "type": "integer",
            "format": "int64"
          }
        ],
        "responses": {
          "204": {
            "description": "pet deleted"
          },
          "default": {
            "description": "unexpected error",
            "schema": {
              "$ref": "#/definitions/Error"
            }
          }
        }
      },
      "get": {
        "tags": [ "Pet Operations" ],
        "operationId": "getPetById",
        "summary": "Finds the pet by id",
        "responses": {
          "200": {
            "description": "Pet response",
            "schema": {
              "$ref": "#/definitions/Pet"
            }
          },
          "default": {
            "description": "Unexpected error",
            "schema": {
              "$ref": "#/definitions/Error"
            }
          }
        }
      },
      "parameters": [
        {
          "name": "id",
          "in": "path",
          "description": "ID of pet",
          "required": true,
          "type": "integer",
          "format": "int64"
        }
      ]
    }
  },
  "definitions": {
    "Category": {
      "id": "Category",
      "properties": {
        "id": {
          "format": "int64",
          "type": "integer"
        },
        "name": {
          "type": "string"
        }
      }
    },
    "Pet": {
      "id": "Pet",
      "properties": {
        "category": {
          "$ref": "#/definitions/Category"
        },
        "id": {
          "description": "unique identifier for the pet",
          "format": "int64",
          "maximum": 100.0,
          "minimum": 0.0,
          "type": "integer"
        },
        "name": {
          "type": "string"
        },
        "photoUrls": {
          "items": {
            "type": "string"
          },
          "type": "array"
        },
        "status": {
          "description": "pet status in the store",
          "enum": [
            "available",
            "pending",
            "sold"
          ],
          "type": "string"
        },
        "tags": {
          "items": {
            "$ref": "#/definitions/Tag"
          },
          "type": "array"
        }
      },
      "required": [
        "id",
        "name"
      ]
    },
    "newPet": {
      "anyOf": [
        {
          "$ref": "#/definitions/Pet"
        },
        {
          "required": [
            "name"
          ]
        }
      ]
    },
    "Tag": {
      "id": "Tag",
      "properties": {
        "id": {
          "format": "int64",
          "type": "integer"
        },
        "name": {
          "type": "string"
        }
      }
    },
    "Error": {
      "required": [
        "code",
        "message"
      ],
      "properties": {
        "code": {
          "type": "integer",
          "format": "int32"
        },
        "message": {
          "type": "string"
        }
      }
    }
  },
  "consumes": [
    "application/json",
    "application/xml"
  ],
  "produces": [
    "application/json",
    "application/xml",
    "text/plain",
    "text/html"
  ],
  "securityDefinitions": {
    "basic": {
      "type": "basic"
    },
    "apiKey": {
      "type": "apiKey",
      "in": "header",
      "name": "X-API-KEY"
    }
  }
}
`