<?php

namespace App\Models\Tenants;

use App\Traits\Auditable;
use App\Traits\BelongsToTenant;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\SoftDeletes;

class Purchase extends Model
{
    use Auditable, BelongsToTenant, SoftDeletes;

    protected $fillable = [
        'tenant_id',
        'purchase_number',
        'purchase_date',
        'client_id',
        'supply_amount',
        'tax_amount',
        'total_amount',
        'description',
        'status',
        'purchase_type',
        'withdrawal_id',
        'approval_id',
        'tax_invoice_received',
        'created_by',
        'updated_by',
        'deleted_by',
    ];

    /**
     * 매입 유형 목록
     */
    public const PURCHASE_TYPES = [
        'unset' => '미설정',
        'raw_material' => '원재료매입',
        'subsidiary_material' => '부재료매입',
        'product' => '상품매입',
        'outsourcing' => '외주가공비',
        'consumables' => '소모품비',
        'repair' => '수선비',
        'transportation' => '운반비',
        'office_supplies' => '사무용품비',
        'rent' => '임차료',
        'utilities' => '수도광열비',
        'communication' => '통신비',
        'vehicle' => '차량유지비',
        'entertainment' => '접대비',
        'insurance' => '보험료',
        'other_service' => '기타용역비',
    ];

    protected $casts = [
        'purchase_date' => 'date',
        'supply_amount' => 'decimal:2',
        'tax_amount' => 'decimal:2',
        'total_amount' => 'decimal:2',
        'client_id' => 'integer',
        'withdrawal_id' => 'integer',
        'approval_id' => 'integer',
        'tax_invoice_received' => 'boolean',
    ];

    /**
     * 상태 목록
     */
    public const STATUSES = [
        'draft' => '임시저장',
        'confirmed' => '확정',
    ];

    /**
     * 거래처 관계
     */
    public function client(): BelongsTo
    {
        return $this->belongsTo(\App\Models\Orders\Client::class);
    }

    /**
     * 출금 관계
     */
    public function withdrawal(): BelongsTo
    {
        return $this->belongsTo(Withdrawal::class);
    }

    /**
     * 연결된 품의서/지출결의서
     */
    public function approval(): BelongsTo
    {
        return $this->belongsTo(Approval::class);
    }

    /**
     * 생성자 관계
     */
    public function creator(): BelongsTo
    {
        return $this->belongsTo(\App\Models\Members\User::class, 'created_by');
    }

    /**
     * 상태 라벨
     */
    public function getStatusLabelAttribute(): string
    {
        return self::STATUSES[$this->status] ?? $this->status;
    }

    /**
     * 확정 가능 여부
     */
    public function canConfirm(): bool
    {
        return $this->status === 'draft';
    }

    /**
     * 수정 가능 여부
     */
    public function canEdit(): bool
    {
        return $this->status === 'draft';
    }

    /**
     * 삭제 가능 여부
     */
    public function canDelete(): bool
    {
        return $this->status === 'draft';
    }
}