package container

import (
	"carrotskin/internal/repository"
	"carrotskin/internal/service"
	"carrotskin/pkg/auth"
	"carrotskin/pkg/database"
	"carrotskin/pkg/email"
	"carrotskin/pkg/redis"
	"carrotskin/pkg/storage"
	"time"

	"go.uber.org/zap"
	"gorm.io/gorm"
)

// Container 依赖注入容器
// 集中管理所有依赖，便于测试和维护
type Container struct {
	// 基础设施依赖
	DB           *gorm.DB
	Redis        *redis.Client
	Logger       *zap.Logger
	JWT          *auth.JWTService
	Casbin       *auth.CasbinService
	Storage      *storage.StorageClient
	CacheManager *database.CacheManager

	// Repository层
	UserRepo      repository.UserRepository
	ProfileRepo   repository.ProfileRepository
	TextureRepo   repository.TextureRepository
	ClientRepo    repository.ClientRepository
	YggdrasilRepo repository.YggdrasilRepository

	// Service层
	UserService         service.UserService
	ProfileService      service.ProfileService
	TextureService      service.TextureService
	TokenService        service.TokenService
	YggdrasilService    service.YggdrasilService
	VerificationService service.VerificationService
	SecurityService     service.SecurityService
	CaptchaService      service.CaptchaService
	SignatureService    *service.SignatureService
}

// NewContainer 创建依赖容器
func NewContainer(
	db *gorm.DB,
	redisClient *redis.Client,
	logger *zap.Logger,
	jwtService *auth.JWTService,
	casbinService *auth.CasbinService,
	storageClient *storage.StorageClient,
	emailService interface{}, // 接受 email.Service 但使用 interface{} 避免循环依赖
) *Container {
	// 创建缓存管理器
	cacheManager := database.NewCacheManager(redisClient, database.CacheConfig{
		Prefix:     "carrotskin:",
		Expiration: 5 * time.Minute,
		Enabled:    true,
		Policy: database.CachePolicy{
			UserTTL:        5 * time.Minute,
			UserEmailTTL:   5 * time.Minute,
			ProfileTTL:     5 * time.Minute,
			ProfileListTTL: 3 * time.Minute,
			TextureTTL:     5 * time.Minute,
			TextureListTTL: 2 * time.Minute,
		},
	})

	c := &Container{
		DB:           db,
		Redis:        redisClient,
		Logger:       logger,
		JWT:          jwtService,
		Casbin:       casbinService,
		Storage:      storageClient,
		CacheManager: cacheManager,
	}

	// 初始化Repository
	c.UserRepo = repository.NewUserRepository(db)
	c.ProfileRepo = repository.NewProfileRepository(db)
	c.TextureRepo = repository.NewTextureRepository(db)
	c.ClientRepo = repository.NewClientRepository(db)
	c.YggdrasilRepo = repository.NewYggdrasilRepository(db)

	// 初始化SignatureService（作为依赖注入，避免在容器中创建并立即调用）
	// 将SignatureService添加到容器中，供其他服务使用
	c.SignatureService = service.NewSignatureService(c.ProfileRepo, redisClient, logger)

	// 初始化Service（注入缓存管理器）
	c.UserService = service.NewUserService(c.UserRepo, jwtService, redisClient, cacheManager, storageClient, logger)
	c.ProfileService = service.NewProfileService(c.ProfileRepo, c.UserRepo, cacheManager, logger)
	c.TextureService = service.NewTextureService(c.TextureRepo, c.UserRepo, storageClient, cacheManager, logger)

	// 获取Yggdrasil私钥并创建JWT服务（TokenService需要）
	// 注意：这里仍然需要预先初始化，因为TokenService在创建时需要YggdrasilJWT
	// 但SignatureService已经作为依赖注入，降低了耦合度
	_, privateKey, err := c.SignatureService.GetOrCreateYggdrasilKeyPair()
	if err != nil {
		logger.Fatal("获取Yggdrasil私钥失败", zap.Error(err))
	}
	yggdrasilJWT := auth.NewYggdrasilJWTService(privateKey, "carrotskin")

	// 创建Redis Token存储（必须使用Redis，包括miniredis回退）
	if redisClient == nil {
		logger.Fatal("Redis客户端未初始化，无法创建Token服务")
	}

	tokenStore := auth.NewTokenStoreRedis(
		redisClient,
		logger,
		auth.WithKeyPrefix("token:"),
		auth.WithDefaultTTL(24*time.Hour),
		auth.WithStaleTTL(30*24*time.Hour),
		auth.WithMaxTokensPerUser(10),
	)
	c.TokenService = service.NewTokenServiceRedis(tokenStore, c.ClientRepo, c.ProfileRepo, yggdrasilJWT, logger)

	// 使用组合服务（内部包含认证、会话、序列化、证书服务）
	c.YggdrasilService = service.NewYggdrasilServiceComposite(db, c.UserRepo, c.ProfileRepo, c.YggdrasilRepo, c.SignatureService, redisClient, logger, c.TokenService)

	// 初始化其他服务
	c.SecurityService = service.NewSecurityService(redisClient)
	c.CaptchaService = service.NewCaptchaService(redisClient, logger)

	// 初始化VerificationService（需要email.Service）
	if emailService != nil {
		if emailSvc, ok := emailService.(*email.Service); ok {
			c.VerificationService = service.NewVerificationService(redisClient, emailSvc)
		}
	}

	return c
}

// NewTestContainer 创建测试用容器（可注入mock依赖）
func NewTestContainer(opts ...Option) *Container {
	c := &Container{}
	for _, opt := range opts {
		opt(c)
	}
	return c
}

// Option 容器配置选项
type Option func(*Container)

// WithDB 设置数据库连接
func WithDB(db *gorm.DB) Option {
	return func(c *Container) {
		c.DB = db
	}
}

// WithRedis 设置Redis客户端
func WithRedis(redis *redis.Client) Option {
	return func(c *Container) {
		c.Redis = redis
	}
}

// WithLogger 设置日志
func WithLogger(logger *zap.Logger) Option {
	return func(c *Container) {
		c.Logger = logger
	}
}

// WithJWT 设置JWT服务
func WithJWT(jwt *auth.JWTService) Option {
	return func(c *Container) {
		c.JWT = jwt
	}
}

// WithStorage 设置存储客户端
func WithStorage(storage *storage.StorageClient) Option {
	return func(c *Container) {
		c.Storage = storage
	}
}

// WithUserRepo 设置用户仓储
func WithUserRepo(repo repository.UserRepository) Option {
	return func(c *Container) {
		c.UserRepo = repo
	}
}

// WithProfileRepo 设置档案仓储
func WithProfileRepo(repo repository.ProfileRepository) Option {
	return func(c *Container) {
		c.ProfileRepo = repo
	}
}

// WithTextureRepo 设置材质仓储
func WithTextureRepo(repo repository.TextureRepository) Option {
	return func(c *Container) {
		c.TextureRepo = repo
	}
}

// WithUserService 设置用户服务
func WithUserService(svc service.UserService) Option {
	return func(c *Container) {
		c.UserService = svc
	}
}

// WithProfileService 设置档案服务
func WithProfileService(svc service.ProfileService) Option {
	return func(c *Container) {
		c.ProfileService = svc
	}
}

// WithTextureService 设置材质服务
func WithTextureService(svc service.TextureService) Option {
	return func(c *Container) {
		c.TextureService = svc
	}
}

// WithTokenService 设置令牌服务
func WithTokenService(svc service.TokenService) Option {
	return func(c *Container) {
		c.TokenService = svc
	}
}

// WithYggdrasilRepo 设置Yggdrasil仓储
func WithYggdrasilRepo(repo repository.YggdrasilRepository) Option {
	return func(c *Container) {
		c.YggdrasilRepo = repo
	}
}

// WithYggdrasilService 设置Yggdrasil服务
func WithYggdrasilService(svc service.YggdrasilService) Option {
	return func(c *Container) {
		c.YggdrasilService = svc
	}
}

// WithVerificationService 设置验证码服务
func WithVerificationService(svc service.VerificationService) Option {
	return func(c *Container) {
		c.VerificationService = svc
	}
}

// WithSecurityService 设置安全服务
func WithSecurityService(svc service.SecurityService) Option {
	return func(c *Container) {
		c.SecurityService = svc
	}
}

// WithCaptchaService 设置验证码服务
func WithCaptchaService(svc service.CaptchaService) Option {
	return func(c *Container) {
		c.CaptchaService = svc
	}
}