package models

import (
	"time"

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

// TrackStem represents a stem file (kick, snare, bass, etc.) for a track
// v0.10.7 F482: Stem sharing
type TrackStem struct {
	ID        uuid.UUID      `gorm:"type:uuid;primaryKey" json:"id" db:"id"`
	TrackID   uuid.UUID      `gorm:"type:uuid;not null" json:"track_id" db:"track_id"`
	Name      string         `gorm:"size:100;not null" json:"name" db:"name"`
	FilePath  string         `gorm:"size:500;not null" json:"file_path" db:"file_path"`
	Format    string         `gorm:"size:10;not null" json:"format" db:"format"`
	SizeBytes int64          `gorm:"not null;default:0" json:"size_bytes" db:"size_bytes"`
	CreatedAt time.Time      `gorm:"autoCreateTime" json:"created_at" db:"created_at"`
	DeletedAt gorm.DeletedAt `json:"-" db:"deleted_at"`

	Track Track `gorm:"foreignKey:TrackID;constraint:OnDelete:CASCADE" json:"-"`
}

// TableName defines the table name for GORM
func (TrackStem) TableName() string {
	return "track_stems"
}

// BeforeCreate generates UUID if not set
func (m *TrackStem) BeforeCreate(tx *gorm.DB) error {
	if m.ID == uuid.Nil {
		m.ID = uuid.New()
	}
	return nil
}