package dto

import (
	"mime/multipart"
	"time"

	"photography-backend/internal/model/entity"
)

// CreatePhotoRequest 创建照片请求
type CreatePhotoRequest struct {
	Title       string    `json:"title" binding:"required,min=1,max=200" validate:"required,min=1,max=200"`
	Description string    `json:"description" binding:"omitempty,max=1000" validate:"omitempty,max=1000"`
	Filename    string    `json:"filename" binding:"required" validate:"required"`
	OriginalURL string    `json:"original_url" binding:"required,url" validate:"required,url"`
	FileSize    int64     `json:"file_size" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	MimeType    string    `json:"mime_type" binding:"omitempty" validate:"omitempty"`
	Width       int       `json:"width" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	Height      int       `json:"height" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	UserID      uint      `json:"user_id" binding:"required,min=1" validate:"required,min=1"`
	AlbumID     *uint     `json:"album_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	CategoryID  *uint     `json:"category_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	TagIDs      []uint    `json:"tag_ids" binding:"omitempty" validate:"omitempty"`
	IsPublic    bool      `json:"is_public" binding:"omitempty"`
	IsFeatured  bool      `json:"is_featured" binding:"omitempty"`
}

// UpdatePhotoRequest 更新照片请求
type UpdatePhotoRequest struct {
	Title        *string  `json:"title" binding:"omitempty,min=1,max=200" validate:"omitempty,min=1,max=200"`
	Description  *string  `json:"description" binding:"omitempty,max=1000" validate:"omitempty,max=1000"`
	AlbumID      *uint    `json:"album_id" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	CategoryID   *uint    `json:"category_id" binding:"omitempty,min=0" validate:"omitempty,min=0"`
	TagIDs       []uint   `json:"tag_ids" binding:"omitempty" validate:"omitempty"`
	IsPublic     *bool    `json:"is_public" binding:"omitempty"`
	IsFeatured   *bool    `json:"is_featured" binding:"omitempty"`
	LocationName *string  `json:"location_name" binding:"omitempty,max=200" validate:"omitempty,max=200"`
	Latitude     *float64 `json:"latitude" binding:"omitempty,min=-90,max=90" validate:"omitempty,min=-90,max=90"`
	Longitude    *float64 `json:"longitude" binding:"omitempty,min=-180,max=180" validate:"omitempty,min=-180,max=180"`
}

// UploadPhotoRequest 上传照片请求
type UploadPhotoRequest struct {
	File        *multipart.FileHeader `form:"photo" binding:"required" validate:"required"`
	Title       string                `form:"title" binding:"omitempty,max=200" validate:"omitempty,max=200"`
	Description string                `form:"description" binding:"omitempty,max=1000" validate:"omitempty,max=1000"`
	AlbumID     *uint                 `form:"album_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	CategoryID  *uint                 `form:"category_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	TagNames    []string              `form:"tag_names" binding:"omitempty" validate:"omitempty"`
	IsPublic    bool                  `form:"is_public" binding:"omitempty"`
	IsFeatured  bool                  `form:"is_featured" binding:"omitempty"`
}

// PhotoResponse 照片响应
type PhotoResponse struct {
	ID           uint                  `json:"id"`
	Title        string                `json:"title"`
	Description  string                `json:"description"`
	Filename     string                `json:"filename"`
	OriginalURL  string                `json:"original_url"`
	ThumbnailURL string                `json:"thumbnail_url"`
	MediumURL    string                `json:"medium_url"`
	LargeURL     string                `json:"large_url"`
	FileSize     int64                 `json:"file_size"`
	MimeType     string                `json:"mime_type"`
	Width        int                   `json:"width"`
	Height       int                   `json:"height"`
	AspectRatio  float64               `json:"aspect_ratio"`

	// EXIF 信息
	CameraMake   string     `json:"camera_make"`
	CameraModel  string     `json:"camera_model"`
	LensModel    string     `json:"lens_model"`
	FocalLength  *float64   `json:"focal_length"`
	Aperture     *float64   `json:"aperture"`
	ShutterSpeed string     `json:"shutter_speed"`
	ISO          *int       `json:"iso"`
	TakenAt      *time.Time `json:"taken_at"`

	// 地理位置
	LocationName string   `json:"location_name"`
	Latitude     *float64 `json:"latitude"`
	Longitude    *float64 `json:"longitude"`

	// 关联信息
	UserID     uint                  `json:"user_id"`
	AlbumID    *uint                 `json:"album_id"`
	CategoryID *uint                 `json:"category_id"`
	User       *UserResponse         `json:"user,omitempty"`
	Album      *AlbumResponse        `json:"album,omitempty"`
	Category   *CategoryResponse     `json:"category,omitempty"`
	Tags       []TagResponse         `json:"tags,omitempty"`

	// 状态和统计
	IsPublic      bool `json:"is_public"`
	IsFeatured    bool `json:"is_featured"`
	ViewCount     int  `json:"view_count"`
	LikeCount     int  `json:"like_count"`
	DownloadCount int  `json:"download_count"`
	SortOrder     int  `json:"sort_order"`

	CreatedAt time.Time `json:"created_at"`
	UpdatedAt time.Time `json:"updated_at"`
}

// PhotoListItem 照片列表项（简化版）
type PhotoListItem struct {
	ID           uint    `json:"id"`
	Title        string  `json:"title"`
	ThumbnailURL string  `json:"thumbnail_url"`
	Width        int     `json:"width"`
	Height       int     `json:"height"`
	AspectRatio  float64 `json:"aspect_ratio"`
	IsPublic     bool    `json:"is_public"`
	IsFeatured   bool    `json:"is_featured"`
	ViewCount    int     `json:"view_count"`
	LikeCount    int     `json:"like_count"`
	CreatedAt    time.Time `json:"created_at"`
}

// ListPhotosOptions 照片列表查询选项
type ListPhotosOptions struct {
	Page       int      `json:"page" form:"page" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	Limit      int      `json:"limit" form:"limit" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
	Sort       string   `json:"sort" form:"sort" binding:"omitempty,oneof=id title created_at updated_at taken_at view_count like_count" validate:"omitempty,oneof=id title created_at updated_at taken_at view_count like_count"`
	Order      string   `json:"order" form:"order" binding:"omitempty,oneof=asc desc" validate:"omitempty,oneof=asc desc"`
	UserID     *uint    `json:"user_id" form:"user_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	AlbumID    *uint    `json:"album_id" form:"album_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	CategoryID *uint    `json:"category_id" form:"category_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	TagIDs     []uint   `json:"tag_ids" form:"tag_ids" binding:"omitempty" validate:"omitempty"`
	IsPublic   *bool    `json:"is_public" form:"is_public" binding:"omitempty"`
	IsFeatured *bool    `json:"is_featured" form:"is_featured" binding:"omitempty"`
	Search     string   `json:"search" form:"search" binding:"omitempty,max=100" validate:"omitempty,max=100"`
	Year       *int     `json:"year" form:"year" binding:"omitempty,min=1900,max=2100" validate:"omitempty,min=1900,max=2100"`
	Month      *int     `json:"month" form:"month" binding:"omitempty,min=1,max=12" validate:"omitempty,min=1,max=12"`
}

// SearchPhotosOptions 照片搜索选项
type SearchPhotosOptions struct {
	Query      string   `json:"query" form:"query" binding:"required,min=1" validate:"required,min=1"`
	Page       int      `json:"page" form:"page" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	Limit      int      `json:"limit" form:"limit" binding:"omitempty,min=1,max=100" validate:"omitempty,min=1,max=100"`
	Sort       string   `json:"sort" form:"sort" binding:"omitempty,oneof=relevance created_at view_count like_count" validate:"omitempty,oneof=relevance created_at view_count like_count"`
	Order      string   `json:"order" form:"order" binding:"omitempty,oneof=asc desc" validate:"omitempty,oneof=asc desc"`
	CategoryID *uint    `json:"category_id" form:"category_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	TagIDs     []uint   `json:"tag_ids" form:"tag_ids" binding:"omitempty" validate:"omitempty"`
	UserID     *uint    `json:"user_id" form:"user_id" binding:"omitempty,min=1" validate:"omitempty,min=1"`
	IsPublic   *bool    `json:"is_public" form:"is_public" binding:"omitempty"`
}

// PhotoListResponse 照片列表响应
type PhotoListResponse struct {
	Photos []PhotoListItem `json:"photos"`
	Total  int64           `json:"total"`
	Page   int             `json:"page"`
	Limit  int             `json:"limit"`
}

// ProcessPhotoOptions 照片处理选项
type ProcessPhotoOptions struct {
	GenerateThumbnails bool     `json:"generate_thumbnails"`
	ThumbnailSizes     []string `json:"thumbnail_sizes"`
	ExtractEXIF        bool     `json:"extract_exif"`
	GenerateHash       bool     `json:"generate_hash"`
	OptimizeSize       bool     `json:"optimize_size"`
	WatermarkEnabled   bool     `json:"watermark_enabled"`
}

// PhotoStatsResponse 照片统计响应
type PhotoStatsResponse struct {
	Total          int64                `json:"total"`
	Published      int64                `json:"published"`
	Private        int64                `json:"private"`
	Featured       int64                `json:"featured"`
	TotalViews     int64                `json:"total_views"`
	TotalLikes     int64                `json:"total_likes"`
	TotalDownloads int64                `json:"total_downloads"`
	FileSize       int64                `json:"file_size"`
	CategoryCounts map[string]int64     `json:"category_counts"`
	TagCounts      map[string]int64     `json:"tag_counts"`
	Recent         []PhotoListItem      `json:"recent"`
	Popular        []PhotoListItem      `json:"popular"`
}

// ConvertToPhotoResponse 将照片实体转换为响应DTO
func ConvertToPhotoResponse(photo *entity.Photo) *PhotoResponse {
	if photo == nil {
		return nil
	}

	response := &PhotoResponse{
		ID:           photo.ID,
		Title:        photo.Title,
		Description:  photo.Description,
		Filename:     photo.Filename,
		OriginalURL:  photo.OriginalURL,
		ThumbnailURL: photo.ThumbnailURL,
		MediumURL:    photo.MediumURL,
		LargeURL:     photo.LargeURL,
		FileSize:     photo.FileSize,
		MimeType:     photo.MimeType,
		Width:        photo.Width,
		Height:       photo.Height,
		AspectRatio:  photo.GetAspectRatio(),

		// EXIF
		CameraMake:   photo.CameraMake,
		CameraModel:  photo.CameraModel,
		LensModel:    photo.LensModel,
		FocalLength:  photo.FocalLength,
		Aperture:     photo.Aperture,
		ShutterSpeed: photo.ShutterSpeed,
		ISO:          photo.ISO,
		TakenAt:      photo.TakenAt,

		// 地理位置
		LocationName: photo.LocationName,
		Latitude:     photo.Latitude,
		Longitude:    photo.Longitude,

		// 关联
		UserID:     photo.UserID,
		AlbumID:    photo.AlbumID,
		CategoryID: photo.CategoryID,

		// 状态
		IsPublic:      photo.IsPublic,
		IsFeatured:    photo.IsFeatured,
		ViewCount:     photo.ViewCount,
		LikeCount:     photo.LikeCount,
		DownloadCount: photo.DownloadCount,
		SortOrder:     photo.SortOrder,

		CreatedAt: photo.CreatedAt,
		UpdatedAt: photo.UpdatedAt,
	}

	// 转换关联对象
	if photo.User.ID != 0 {
		response.User = ConvertToUserResponse(&photo.User)
	}
	if photo.Category != nil {
		response.Category = ConvertToCategoryResponse(photo.Category)
	}

	return response
}

// ConvertToPhotoListItem 将照片实体转换为列表项DTO
func ConvertToPhotoListItem(photo *entity.Photo) PhotoListItem {
	return PhotoListItem{
		ID:           photo.ID,
		Title:        photo.Title,
		ThumbnailURL: photo.ThumbnailURL,
		Width:        photo.Width,
		Height:       photo.Height,
		AspectRatio:  photo.GetAspectRatio(),
		IsPublic:     photo.IsPublic,
		IsFeatured:   photo.IsFeatured,
		ViewCount:    photo.ViewCount,
		LikeCount:    photo.LikeCount,
		CreatedAt:    photo.CreatedAt,
	}
}