package models

import (
	"time"

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

// Queue represents a user's playback queue
type Queue struct {
	ID             uuid.UUID  `gorm:"type:uuid;primaryKey" json:"id"`
	UserID         uuid.UUID  `gorm:"type:uuid;not null;uniqueIndex" json:"user_id"`
	CurrentTrackID *uuid.UUID `gorm:"type:uuid" json:"current_track_id,omitempty"`
	CurrentPosition int       `gorm:"not null;default:0" json:"current_position"`
	IsPlaying      bool       `gorm:"not null;default:false" json:"is_playing"`
	Shuffle        bool       `gorm:"not null;default:false" json:"shuffle"`
	RepeatMode     string     `gorm:"size:20;not null;default:off" json:"repeat_mode"`
	Volume         int        `gorm:"not null;default:100" json:"volume"`
	UpdatedAt      time.Time  `gorm:"autoUpdateTime" json:"updated_at"`

	Items []QueueItem `gorm:"foreignKey:QueueID;constraint:OnDelete:CASCADE" json:"items,omitempty"`
}

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

// BeforeCreate GORM hook to generate UUID if not set
func (q *Queue) BeforeCreate(tx *gorm.DB) error {
	if q.ID == uuid.Nil {
		q.ID = uuid.New()
	}
	return nil
}

// QueueItem represents a track in a queue
type QueueItem struct {
	ID        uuid.UUID `gorm:"type:uuid;primaryKey" json:"id"`
	QueueID   uuid.UUID `gorm:"type:uuid;not null" json:"queue_id"`
	TrackID   uuid.UUID `gorm:"type:uuid;not null" json:"track_id"`
	Position  int       `gorm:"not null" json:"position"`
	AddedAt   time.Time `gorm:"autoCreateTime" json:"added_at"`

	Track Track `gorm:"foreignKey:TrackID" json:"track,omitempty"`
}

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

// BeforeCreate GORM hook to generate UUID if not set
func (qi *QueueItem) BeforeCreate(tx *gorm.DB) error {
	if qi.ID == uuid.Nil {
		qi.ID = uuid.New()
	}
	return nil
}