package api

import (
	"net/http"

	"github.com/gin-gonic/gin"
	"github.com/google/uuid"
	"github.com/redis/go-redis/v9"
	"go.uber.org/zap"
	"golang.org/x/crypto/bcrypt"

	trackcore "veza-backend-api/internal/core/track"
	"veza-backend-api/internal/handlers"
	"veza-backend-api/internal/repositories"
	"veza-backend-api/internal/services"
)

// setupUserRoutes configure les routes utilisateur
func (r *APIRouter) setupUserRoutes(router *gin.RouterGroup) {
	userRepo := repositories.NewGormUserRepository(r.db.GormDB)
	userService := services.NewUserServiceWithDB(userRepo, r.db.GormDB)
	socialService := services.NewSocialService(r.db, r.logger)
	userService.SetSocialService(socialService) // v0.10.0 F187: profiles get is_following, counts
	profileHandler := handlers.NewProfileHandler(userService, r.logger)
	if r.config != nil && r.config.PermissionService != nil {
		profileHandler.SetPermissionService(r.config.PermissionService)
	}
	profileHandler.SetSocialService(socialService)
	if r.notificationService == nil {
		r.notificationService = services.NewNotificationService(r.db, r.logger)
		if r.pushService != nil {
			r.notificationService.SetPushService(r.pushService)
		}
	}
	profileHandler.SetNotificationService(r.notificationService)

	users := router.Group("/users")
	{
		users.GET("", profileHandler.ListUsers)
		// v0.10.0 F211: /suggestions must be before /:id to avoid "suggestions" matching as id
		if r.config.AuthMiddleware != nil {
			users.GET("/suggestions", r.config.AuthMiddleware.RequireAuth(), profileHandler.GetFollowSuggestions)
		}
		users.GET("/:id", profileHandler.GetProfile)
		users.GET("/by-username/:username", profileHandler.GetProfileByUsername)
		users.GET("/search", profileHandler.SearchUsers)

		// v0.10.3 F203: User reposts (public - profile shows reposted tracks)
		uploadDir := "uploads/tracks"
		var redisClient *redis.Client
		streamServerURL, streamAPIKey := "", ""
		if r.config != nil {
			if r.config.UploadDir != "" {
				uploadDir = r.config.UploadDir
			}
			redisClient = r.config.RedisClient
			streamServerURL = r.config.StreamServerURL
			streamAPIKey = r.config.StreamServerInternalAPIKey
		}
		repostService := services.NewTrackRepostService(r.db.GormDB)
		trackServiceForReposts := trackcore.NewTrackServiceWithDB(r.db, r.logger, uploadDir)
		if r.config != nil && r.config.CacheService != nil {
			trackServiceForReposts.SetCacheService(r.config.CacheService)
		}
		trackHandlerForReposts := trackcore.NewTrackHandler(
			trackServiceForReposts,
			services.NewTrackUploadService(r.db.GormDB, r.logger),
			services.NewTrackChunkService(uploadDir+"/chunks", redisClient, r.logger),
			services.NewTrackLikeService(r.db.GormDB, r.logger),
			services.NewStreamServiceWithAPIKey(streamServerURL, streamAPIKey, r.logger),
		)
		trackHandlerForReposts.SetRepostService(repostService)
		users.GET("/:id/reposts", trackHandlerForReposts.GetUserRepostedTracks)

		if r.config.AuthMiddleware != nil {
			protected := users.Group("")
			protected.Use(r.config.AuthMiddleware.RequireAuth())
			r.applyCSRFProtection(protected)

			settingsHandler := handlers.NewSettingsHandler(userService, r.logger)
			protected.GET("/settings", settingsHandler.GetSettings)
			protected.PUT("/settings", settingsHandler.UpdateSettings)

			// v0.801: UI preferences (theme, contrast, etc.)
			protected.GET("/me/preferences", settingsHandler.GetPreferences)
			protected.PUT("/me/preferences", settingsHandler.UpdatePreferences)

			userOwnerResolver := func(c *gin.Context) (uuid.UUID, error) {
				userIDStr := c.Param("id")
				return uuid.Parse(userIDStr)
			}
			protected.PUT("/:id", r.config.AuthMiddleware.RequireOwnershipOrAdmin("user", userOwnerResolver), profileHandler.UpdateProfile)
			protected.DELETE("/:id", r.config.AuthMiddleware.RequireOwnershipOrAdmin("user", userOwnerResolver), profileHandler.DeleteUser)

			protected.GET("/:id/completion", profileHandler.GetProfileCompletion)

			presenceService := services.NewPresenceService(r.db.GormDB, r.logger)
			presenceHandler := handlers.NewPresenceHandler(presenceService, r.logger)
			protected.PUT("/me/presence", presenceHandler.UpdatePresence)
			protected.GET("/:id/presence", presenceHandler.GetPresence)

			protected.POST("/:id/follow", profileHandler.FollowUser)
			protected.DELETE("/:id/follow", profileHandler.UnfollowUser)

			protected.POST("/:id/block", profileHandler.BlockUser)
			protected.DELETE("/:id/block", profileHandler.UnblockUser)

			roleService := services.NewRoleService(r.db.GormDB)
			roleHandler := handlers.NewRoleHandler(roleService, r.logger)
			protected.POST("/:id/roles", roleHandler.AssignRole)
			protected.DELETE("/:id/roles/:roleId", roleHandler.RevokeRole)

			avatarUploadDir := r.config.UploadDir
			if avatarUploadDir == "" {
				avatarUploadDir = "uploads/avatars"
			}
			imageService := services.NewImageService(avatarUploadDir)
			avatarHandler := handlers.NewAvatarHandler(imageService, userService)
			protected.POST("/:id/avatar", avatarHandler.UploadAvatar)
			protected.DELETE("/:id/avatar", avatarHandler.DeleteAvatar)

			uploadDir := r.config.UploadDir
			if uploadDir == "" {
				uploadDir = "uploads/tracks"
			}
			likeService := services.NewTrackLikeService(r.db.GormDB, r.logger)
			trackService := trackcore.NewTrackServiceWithDB(r.db, r.logger, uploadDir)
			if r.config.CacheService != nil {
				trackService.SetCacheService(r.config.CacheService)
			}
			streamService := services.NewStreamServiceWithAPIKey(r.config.StreamServerURL, r.config.StreamServerInternalAPIKey, r.logger)
			trackService.SetStreamService(streamService) // INT-02: Enable HLS pipeline for regular uploads
			trackUploadService := services.NewTrackUploadService(r.db.GormDB, r.logger)
			var redisClient *redis.Client
			if r.config != nil {
				redisClient = r.config.RedisClient
			}
			chunksDir := uploadDir + "/chunks"
			chunkService := services.NewTrackChunkService(chunksDir, redisClient, r.logger)
			trackHandlerForLikes := trackcore.NewTrackHandler(
				trackService,
				trackUploadService,
				chunkService,
				likeService,
				streamService,
			)
			protected.GET("/:id/likes", trackHandlerForLikes.GetUserLikedTracks)

			dataExportService := services.NewDataExportService(r.db.GormDB, r.logger)
			gdprExportService := services.NewGDPRExportService(
				r.db.GormDB, dataExportService, r.config.S3StorageService, r.notificationService, r.logger,
			)
			emailSvc := services.NewEmailService(r.db, r.logger)
			gdprExportService.SetEmailService(emailSvc)
			var gdprRedis *redis.Client
			var gdprS3 *services.S3StorageService
			if r.config != nil {
				gdprRedis = r.config.RedisClient
				gdprS3 = r.config.S3StorageService
			}
			gdprExportHandler := handlers.NewGDPRExportHandler(
				r.db.GormDB, gdprExportService, gdprS3, gdprRedis, r.logger,
			)

			// PUT /me/password: Change password
			protected.PUT("/me/password", func(c *gin.Context) {
				userID, exists := c.Get("user_id")
				if !exists {
					c.JSON(http.StatusUnauthorized, gin.H{"error": gin.H{"code": "UNAUTHORIZED", "message": "User ID not found"}})
					return
				}
				userUUID, ok := userID.(uuid.UUID)
				if !ok {
					c.JSON(http.StatusBadRequest, gin.H{"error": gin.H{"code": "INVALID_USER_ID", "message": "Invalid user ID"}})
					return
				}

				var req struct {
					CurrentPassword string `json:"current_password" binding:"required"`
					NewPassword     string `json:"new_password" binding:"required"`
				}
				if err := c.ShouldBindJSON(&req); err != nil {
					c.JSON(http.StatusBadRequest, gin.H{"error": gin.H{"code": "INVALID_REQUEST", "message": "Current password and new password are required"}})
					return
				}
				if len(req.NewPassword) < 12 {
					c.JSON(http.StatusBadRequest, gin.H{"error": gin.H{"code": "WEAK_PASSWORD", "message": "Password must be at least 12 characters long"}})
					return
				}

				var currentHash string
				if err := r.db.GormDB.Raw("SELECT password_hash FROM users WHERE id = ?", userUUID).Scan(&currentHash).Error; err != nil {
					r.logger.Error("Failed to get current password hash", zap.Error(err))
					c.JSON(http.StatusInternalServerError, gin.H{"error": gin.H{"code": "INTERNAL_ERROR", "message": "Failed to verify password"}})
					return
				}

				if err := bcrypt.CompareHashAndPassword([]byte(currentHash), []byte(req.CurrentPassword)); err != nil {
					c.JSON(http.StatusUnauthorized, gin.H{"error": gin.H{"code": "WRONG_PASSWORD", "message": "Current password is incorrect"}})
					return
				}

				newHash, err := bcrypt.GenerateFromPassword([]byte(req.NewPassword), bcrypt.DefaultCost)
				if err != nil {
					r.logger.Error("Failed to hash new password", zap.Error(err))
					c.JSON(http.StatusInternalServerError, gin.H{"error": gin.H{"code": "INTERNAL_ERROR", "message": "Failed to update password"}})
					return
				}

				if err := r.db.GormDB.Exec("UPDATE users SET password_hash = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?", string(newHash), userUUID).Error; err != nil {
					r.logger.Error("Failed to update password", zap.Error(err))
					c.JSON(http.StatusInternalServerError, gin.H{"error": gin.H{"code": "INTERNAL_ERROR", "message": "Failed to update password"}})
					return
				}

				c.JSON(http.StatusOK, gin.H{"message": "Password changed successfully"})
			})

			// GET /me/export: sync JSON fallback (v0.10.8 - prefer POST for async ZIP)
			protected.GET("/me/export", gdprExportHandler.ExportJSON)

			// POST /me/export: async GDPR export (v0.10.8 F065)
			protected.POST("/me/export", gdprExportHandler.RequestExport)

			// GET /me/exports: list exports (v0.10.8)
			protected.GET("/me/exports", gdprExportHandler.ListExports)
			// GET /me/exports/:id/download: redirect to S3 presigned URL (must be before :id)
			protected.GET("/me/exports/:id/download", gdprExportHandler.DownloadExport)
			// GET /me/exports/:id: export status
			protected.GET("/me/exports/:id", gdprExportHandler.GetExport)

			// DELETE /me: Account deletion (v0.803 SEC2-05)
			protected.DELETE("/me", handlers.DeleteAccountHandler(
				r.db.GormDB,
				r.config.SessionService,
				r.config.AuditService,
				r.config.S3StorageService,
				r.logger,
			))

			// POST /me/privacy/opt-out: CCPA Do Not Sell (v0.803 SEC2-06)
			protected.POST("/me/privacy/opt-out", handlers.PrivacyOptOut(r.db.GormDB))

			// POST /me/upgrade-creator: self-service creator role (v1.0.6)
			// Requires is_verified=true; one-way flip from 'user' to 'creator'.
			var upgradeAudit *services.AuditService
			if r.config != nil {
				upgradeAudit = r.config.AuditService
			}
			protected.POST("/me/upgrade-creator", handlers.UpgradeToCreator(r.db.GormDB, upgradeAudit, r.logger))
		}
	}
}

// setupRoleRoutes configure les routes de gestion des rôles
func (r *APIRouter) setupRoleRoutes(router *gin.RouterGroup) {
	roleService := services.NewRoleService(r.db.GormDB)
	roleHandler := handlers.NewRoleHandler(roleService, r.logger)

	roles := router.Group("/roles")
	{
		if r.config.AuthMiddleware != nil {
			protected := roles.Group("")
			protected.Use(r.config.AuthMiddleware.RequireAuth())
			r.applyCSRFProtection(protected)
			{
				protected.GET("", roleHandler.GetRoles)
				protected.GET("/:id", roleHandler.GetRole)
				protected.POST("", roleHandler.CreateRole)
				protected.PUT("/:id", roleHandler.UpdateRole)
				protected.DELETE("/:id", roleHandler.DeleteRole)
			}
		}
	}
}