package models

import (
	"time"

	"github.com/google/uuid"
	"gorm.io/gorm"
)

// Track représente une piste audio dans le système
// MIGRATION UUID: Completée. ID et UserID sont des UUIDs.
type Track struct {
	ID                uuid.UUID      `gorm:"type:uuid;primaryKey" json:"id" db:"id"`
	UserID            uuid.UUID      `gorm:"type:uuid;not null;column:creator_id" json:"creator_id" db:"creator_id"`
	FileID            *uuid.UUID     `gorm:"type:uuid" json:"file_id,omitempty" db:"file_id"` // NULL temporairement avant création fichier
	Title             string         `gorm:"not null;size:255" json:"title" db:"title"`
	Artist            string         `gorm:"size:255" json:"artist" db:"artist"`
	Album             string         `gorm:"size:255" json:"album" db:"album"`
	Duration          int            `gorm:"not null" json:"duration" db:"duration"` // seconds
	Genre             string         `gorm:"size:100" json:"genre" db:"genre"`
	Year              int            `gorm:"default:0" json:"year" db:"year"`
	FilePath          string         `gorm:"not null;size:500" json:"file_path" db:"file_path"`
	FileSize          int64          `gorm:"not null" json:"file_size" db:"file_size"`      // bytes
	Format            string         `gorm:"size:10" json:"format" db:"format"`             // mp3, flac, wav, etc.
	Bitrate           int            `gorm:"default:0" json:"bitrate" db:"bitrate"`         // kbps
	SampleRate        int            `gorm:"default:0" json:"sample_rate" db:"sample_rate"` // Hz
	WaveformPath      string         `gorm:"size:500" json:"waveform_path" db:"waveform_path"`
	CoverArtPath      string         `gorm:"size:500" json:"cover_art_path" db:"cover_art_path"`
	IsPublic          bool           `gorm:"default:true" json:"is_public" db:"is_public"`
	Status            TrackStatus    `gorm:"default:'uploading'" json:"status" db:"status"`
	StatusMessage     string         `gorm:"type:text" json:"status_message,omitempty" db:"status_message"`
	StreamStatus      string         `gorm:"default:'pending'" json:"stream_status" db:"stream_status"` // pending, processing, ready, error
	StreamManifestURL string         `gorm:"size:500" json:"stream_manifest_url" db:"stream_manifest_url"`
	PlayCount         int64          `gorm:"default:0" json:"play_count" db:"play_count"`
	LikeCount         int64          `gorm:"default:0" json:"like_count" db:"like_count"`
	CreatedAt         time.Time      `gorm:"autoCreateTime" json:"created_at" db:"created_at"`
	UpdatedAt         time.Time      `gorm:"autoUpdateTime" json:"updated_at" db:"updated_at"`
	DeletedAt         gorm.DeletedAt `json:"-" db:"deleted_at"`

	// Relations
	User       User           `gorm:"foreignKey:UserID;constraint:OnDelete:CASCADE" json:"-"`
	Playlists  []Playlist     `gorm:"many2many:playlist_tracks;" json:"-"`
	Likes      []TrackLike    `gorm:"foreignKey:TrackID;constraint:OnDelete:CASCADE" json:"-"`
	Shares     []TrackShare   `gorm:"foreignKey:TrackID;constraint:OnDelete:CASCADE" json:"-"`
	Versions   []TrackVersion `gorm:"foreignKey:TrackID;constraint:OnDelete:CASCADE" json:"-"`
	HLSStreams []HLSStream    `gorm:"foreignKey:TrackID;constraint:OnDelete:CASCADE" json:"-"`
}

// TableName définit le nom de la table pour GORM
func (Track) TableName() string {
	return "tracks"
}

// BeforeCreate hook GORM pour générer UUID si non défini
func (m *Track) BeforeCreate(tx *gorm.DB) error {
	if m.ID == uuid.Nil {
		m.ID = uuid.New()
	}
	return nil
}
