package api

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

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

// setupTrackRoutes configure les routes de gestion des tracks
func (r *APIRouter) setupTrackRoutes(router *gin.RouterGroup) {
	uploadDir := r.config.UploadDir
	if uploadDir == "" {
		uploadDir = "uploads/tracks"
	}
	chunksDir := uploadDir + "/chunks"

	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
	discoverService := discovercore.NewService(r.db.GormDB, r.logger)
	trackService.SetDiscoverService(discoverService) // v0.10.1: tags/genres sync
	trackUploadService := services.NewTrackUploadService(r.db.GormDB, r.logger)
	var redisClient *redis.Client
	if r.config != nil {
		redisClient = r.config.RedisClient
	}
	chunkService := services.NewTrackChunkService(chunksDir, redisClient, r.logger)
	likeService := services.NewTrackLikeService(r.db.GormDB, r.logger)

	trackHandler := trackcore.NewTrackHandler(
		trackService,
		trackUploadService,
		chunkService,
		likeService,
		streamService,
	)
	if r.config != nil {
		if r.config.PermissionService != nil {
			trackHandler.SetPermissionService(r.config.PermissionService)
		}
		if r.config.JobWorker != nil {
			trackHandler.SetJobEnqueuer(r.config.JobWorker)
		}
	}
	uploadConfig := getUploadConfigWithEnv()
	uploadValidator, err := services.NewUploadValidator(uploadConfig, r.logger)
	if err != nil {
		r.logger.Warn("Upload validator created with ClamAV unavailable - uploads will be rejected", zap.Error(err))
		uploadConfig.ClamAVEnabled = false
		uploadValidator, _ = services.NewUploadValidator(uploadConfig, r.logger)
	}
	trackHandler.SetUploadValidator(uploadValidator)

	trackSearchService := services.NewTrackSearchServiceWithDB(r.db)
	trackHandler.SetSearchService(trackSearchService)

	trackVersionService := services.NewTrackVersionService(r.db.GormDB, r.logger, uploadDir)
	trackHandler.SetVersionService(trackVersionService)

	playbackAnalyticsService := services.NewPlaybackAnalyticsService(r.db.GormDB, r.logger)
	trackHandler.SetPlaybackAnalyticsService(playbackAnalyticsService)

	trackHistoryService := services.NewTrackHistoryService(r.db.GormDB, r.logger)
	trackHandler.SetHistoryService(trackHistoryService)

	licenseChecker := services.NewDBTrackDownloadLicenseChecker(r.db.GormDB, r.logger)
	trackHandler.SetLicenseChecker(licenseChecker)

	if r.notificationService == nil {
		r.notificationService = services.NewNotificationService(r.db, r.logger)
		if r.pushService != nil {
			r.notificationService.SetPushService(r.pushService)
		}
	}
	trackHandler.SetNotificationService(r.notificationService)

	repostService := services.NewTrackRepostService(r.db.GormDB)
	trackHandler.SetRepostService(repostService) // v0.10.3 F203

	trackRecommendationService := services.NewTrackRecommendationService(r.db.GormDB, r.logger)
	trackHandler.SetTrackRecommendationService(trackRecommendationService)

	waveformService := services.NewWaveformService(r.db.GormDB, r.logger, r.config.S3StorageService)
	if r.config.CacheService != nil {
		waveformService.SetCacheService(r.config.CacheService)
	}
	trackHandler.SetWaveformService(waveformService)

	tracks := router.Group("/tracks")
	{
		if r.config.AuthMiddleware != nil {
			tracks.GET("", r.config.AuthMiddleware.OptionalAuth(), trackHandler.ListTracks)
		} else {
			tracks.GET("", trackHandler.ListTracks)
		}
		tracks.GET("/search", trackHandler.SearchTracks)
		tracks.GET("/suggested-tags", trackHandler.GetSuggestedTags)
		if r.config.AuthMiddleware != nil {
			tracks.GET("/:id", r.config.AuthMiddleware.OptionalAuth(), trackHandler.GetTrack)
		} else {
			tracks.GET("/:id", trackHandler.GetTrack)
		}
		tracks.GET("/:id/lyrics", trackHandler.GetLyrics)
		tracks.GET("/:id/stats", trackHandler.GetTrackStats)
		tracks.GET("/:id/waveform", trackHandler.GetWaveform)
		tracks.GET("/:id/history", trackHandler.GetTrackHistory)
		tracks.GET("/:id/download", trackHandler.DownloadTrack)
		tracks.GET("/shared/:token", trackHandler.GetSharedTrack)
		if r.config.AuthMiddleware != nil {
			tracks.GET("/:id/repost", r.config.AuthMiddleware.OptionalAuth(), trackHandler.GetRepostStatus) // v0.10.3 F203
		} else {
			tracks.GET("/:id/repost", trackHandler.GetRepostStatus)
		}

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

			protected.GET("/recommendations", trackHandler.GetRecommendations)

			uploadGroup := protected.Group("")
			uploadGroup.Use(r.config.AuthMiddleware.RequireContentCreatorRole())
			uploadGroup.POST("", trackHandler.UploadTrack)

			trackOwnerResolver := func(c *gin.Context) (uuid.UUID, error) {
				trackIDStr := c.Param("id")
				trackID, err := uuid.Parse(trackIDStr)
				if err != nil {
					return uuid.Nil, err
				}
				track, err := trackService.GetTrackByID(c.Request.Context(), trackID)
				if err != nil {
					return uuid.Nil, err
				}
				return track.UserID, nil
			}
			protected.PUT("/:id", r.config.AuthMiddleware.RequireOwnershipOrAdmin("track", trackOwnerResolver), trackHandler.UpdateTrack)
			protected.PUT("/:id/lyrics", r.config.AuthMiddleware.RequireOwnershipOrAdmin("track", trackOwnerResolver), trackHandler.UpdateLyrics)
			protected.DELETE("/:id", r.config.AuthMiddleware.RequireOwnershipOrAdmin("track", trackOwnerResolver), trackHandler.DeleteTrack)

			protected.GET("/:id/status", trackHandler.GetUploadStatus)
			protected.POST("/initiate", trackHandler.InitiateChunkedUpload)
			protected.POST("/chunk", trackHandler.UploadChunk)
			protected.POST("/complete", trackHandler.CompleteChunkedUpload)
			protected.GET("/quota/:id", trackHandler.GetUploadQuota)
			protected.GET("/resume/:uploadId", trackHandler.ResumeUpload)

			protected.POST("/batch/delete", trackHandler.BatchDeleteTracks)
			protected.POST("/batch/update", trackHandler.BatchUpdateTracks)

			protected.POST("/:id/like", trackHandler.LikeTrack)
			protected.DELETE("/:id/like", trackHandler.UnlikeTrack)
			protected.GET("/:id/likes", trackHandler.GetTrackLikes)

			protected.POST("/:id/repost", trackHandler.RepostTrack)
			protected.DELETE("/:id/repost", trackHandler.UnrepostTrack)

			protected.POST("/:id/share", trackHandler.CreateShare)
			protected.DELETE("/share/:id", trackHandler.RevokeShare)

			protected.POST("/:id/versions/:versionId/restore", trackHandler.RestoreVersion)

			protected.POST("/:id/play", trackHandler.RecordPlay)

			// v0.10.7 F482: Stem sharing
			stemUploadDir := uploadDir
			if stemUploadDir == "" {
				stemUploadDir = "uploads/tracks"
			}
			stemService := services.NewTrackStemService(r.db.GormDB, stemUploadDir, r.logger)
			stemHandler := handlers.NewTrackStemHandler(stemService, trackService, r.logger)
			protected.GET("/:id/stems/:name/download", stemHandler.DownloadStem)
			protected.POST("/:id/stems", r.config.AuthMiddleware.RequireOwnershipOrAdmin("track", trackOwnerResolver), stemHandler.UploadStem)
			protected.GET("/:id/stems", stemHandler.ListStems)

			hlsOutputDir := r.config.UploadDir
			if hlsOutputDir == "" {
				hlsOutputDir = "uploads/tracks"
			}
			hlsService := services.NewHLSService(r.db.GormDB, hlsOutputDir, r.logger)
			hlsHandler := handlers.NewHLSHandler(hlsService)
			tracks.GET("/:id/hls/info", hlsHandler.GetStreamInfo)
			tracks.GET("/:id/hls/status", hlsHandler.GetStreamStatus)

			if r.config.HLSEnabled {
				hlsStreaming := tracks.Group("/:id/hls")
				{
					hlsStreaming.GET("/master.m3u8", hlsHandler.ServeMasterPlaylist)
					hlsStreaming.GET("/:bitrate/playlist.m3u8", hlsHandler.ServeQualityPlaylist)
					hlsStreaming.GET("/:bitrate/:segment", hlsHandler.ServeSegment)
				}
			}
		}
	}

	commentService := services.NewCommentService(r.db.GormDB, r.logger)
	commentService.SetModerationService(services.NewCommentModerationService(r.db.GormDB)) // v0.10.3 F201
	commentHandler := handlers.NewCommentHandler(commentService, r.logger)
	commentHandler.SetNotificationService(r.notificationService)

	comments := router.Group("/tracks")
	{
		comments.GET("/:id/comments", commentHandler.GetComments)

		if r.config.AuthMiddleware != nil {
			protected := comments.Group("")
			protected.Use(r.config.AuthMiddleware.RequireAuth())
			r.applyCSRFProtection(protected)
			{
				protected.POST("/:id/comments", commentHandler.CreateComment)
			}
		}
	}

	commentsProtected := router.Group("/comments")
	{
		if r.config.AuthMiddleware != nil {
			commentsProtected.Use(r.config.AuthMiddleware.RequireAuth())
			r.applyCSRFProtection(commentsProtected)
			{
				commentsProtected.DELETE("/:id", commentHandler.DeleteComment)
			}
		}
	}
}