package api

import (
	"net/http"
	"strconv"
	"time"

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

	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)
	profileHandler := handlers.NewProfileHandler(userService, r.logger)
	if r.config != nil && r.config.PermissionService != nil {
		profileHandler.SetPermissionService(r.config.PermissionService)
	}
	socialService := services.NewSocialService(r.db, r.logger)
	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)
		users.GET("/:id", profileHandler.GetProfile)
		users.GET("/by-username/:username", profileHandler.GetProfileByUsername)
		users.GET("/search", profileHandler.SearchUsers)

		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)

			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)
			exportHandler := func(c *gin.Context) {
				userID, exists := c.Get("user_id")
				if !exists {
					c.JSON(http.StatusUnauthorized, gin.H{"error": "User ID not found"})
					return
				}

				userUUID, ok := userID.(uuid.UUID)
				if !ok {
					c.JSON(http.StatusBadRequest, gin.H{"error": "Invalid user ID"})
					return
				}

				jsonData, err := dataExportService.ExportUserDataAsJSON(c.Request.Context(), userUUID)
				if err != nil {
					r.logger.Error("Failed to export user data", zap.Error(err), zap.String("user_id", userUUID.String()))
					c.JSON(http.StatusInternalServerError, gin.H{"error": "Failed to export user data"})
					return
				}

				filename := "veza-data-export-" + time.Now().Format("2006-01-02T15-04-05") + ".json"
				c.Header("Content-Type", "application/json")
				c.Header("Content-Disposition", `attachment; filename="`+filename+`"`)
				c.Header("Content-Length", strconv.Itoa(len(jsonData)))

				c.Data(http.StatusOK, "application/json", jsonData)
			}
			protected.GET("/me/export", exportHandler)
		}
	}
}

// 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)
			}
		}
	}
}