package container

import (
	"context"
	"time"

	"carrotskin/internal/repository"
	"carrotskin/internal/service"
	"carrotskin/pkg/auth"
	"carrotskin/pkg/config"
	"carrotskin/pkg/database"
	"carrotskin/pkg/email"
	"carrotskin/pkg/redis"
	"carrotskin/pkg/storage"

	"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 {
	// 配置
	Config *config.Config

	// 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
	CaptchaService      service.CaptchaService
	SignatureService    *service.SignatureService
}

// NewContainer 创建依赖容器
func NewContainer(
	cfg *config.Config,
	db *gorm.DB,
	redisClient *redis.Client,
	logger *zap.Logger,
	jwtService *auth.JWTService,
	casbinService *auth.CasbinService,
	storageClient *storage.StorageClient,
	emailService *email.Service,
) *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{
		Config:       cfg,
		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(cfg, 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, db)

	// 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
	// 使用后台 ctx（启动阶段不依赖请求 ctx）
	initCtx, cancelInit := context.WithTimeout(context.Background(), 30*time.Second)
	_, privateKey, err := c.SignatureService.GetOrCreateYggdrasilKeyPair(initCtx)
	cancelInit()
	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(c.UserRepo, c.ProfileRepo, c.YggdrasilRepo, c.TextureRepo, c.SignatureService, redisClient, logger, c.TokenService)

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

	// 初始化VerificationService（需要email.Service）
	if emailService != nil {
		c.VerificationService = service.NewVerificationService(cfg, redisClient, emailService)
	}

	return c
}