package services

import (
	"context"
	"fmt"

	"github.com/google/uuid" // Added import for uuid
	"go.uber.org/zap"
	"gorm.io/gorm"
	"veza-backend-api/internal/models"
)

// TrackUploadService gère le suivi de progression des uploads de tracks
type TrackUploadService struct {
	db     *gorm.DB
	logger *zap.Logger
}

// NewTrackUploadService crée un nouveau service de suivi d'upload
func NewTrackUploadService(db *gorm.DB, logger *zap.Logger) *TrackUploadService {
	if logger == nil {
		logger = zap.NewNop()
	}
	return &TrackUploadService{
		db:     db,
		logger: logger,
	}
}

// GetUploadProgress récupère la progression d'un upload de track
func (s *TrackUploadService) GetUploadProgress(ctx context.Context, trackID uuid.UUID) (*models.UploadProgress, error) { // Changed trackID to uuid.UUID
	var track models.Track
	if err := s.db.WithContext(ctx).First(&track, "id = ?", trackID).Error; err != nil { // Updated query
		if err == gorm.ErrRecordNotFound {
			return nil, fmt.Errorf("track not found")
		}
		return nil, fmt.Errorf("failed to get track: %w", err)
	}

	// Calculer le pourcentage de progression basé sur le statut
	progress := s.calculateProgress(track.Status)

	return &models.UploadProgress{
		TrackID:           trackID,
		Status:            track.Status,
		Progress:          progress,
		Message:           track.StatusMessage,
		StreamStatus:      track.StreamStatus,
		StreamManifestURL: track.StreamManifestURL,
	}, nil
}

// UpdateUploadStatus met à jour le statut d'un track
func (s *TrackUploadService) UpdateUploadStatus(ctx context.Context, trackID uuid.UUID, status models.TrackStatus, message string) error { // Changed trackID to uuid.UUID
	updates := map[string]interface{}{
		"status": status,
	}
	if message != "" {
		updates["status_message"] = message
	}

	if err := s.db.WithContext(ctx).Model(&models.Track{}).Where("id = ?", trackID).Updates(updates).Error; err != nil {
		return fmt.Errorf("failed to update status: %w", err)
	}

	s.logger.Info("Track upload status updated",
		zap.Any("track_id", trackID), // Changed to zap.Any for uuid.UUID
		zap.String("status", string(status)),
		zap.String("message", message),
	)

	return nil
}

// calculateProgress calcule le pourcentage de progression basé sur le statut
func (s *TrackUploadService) calculateProgress(status models.TrackStatus) int {
	switch status {
	case models.TrackStatusUploading:
		return 25 // 25% pendant l'upload
	case models.TrackStatusProcessing:
		return 50 // 50% pendant le traitement
	case models.TrackStatusCompleted:
		return 100 // 100% une fois terminé
	case models.TrackStatusFailed:
		return 0 // 0% en cas d'échec
	default:
		return 0
	}
}