<?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\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

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

    protected $fillable = [
        'tenant_id',
        'bill_number',
        'bill_type',
        'client_id',
        'client_name',
        'amount',
        'issue_date',
        'maturity_date',
        'status',
        'reason',
        'installment_count',
        'note',
        'is_electronic',
        'bank_account_id',
        'created_by',
        'updated_by',
        'deleted_by',
    ];

    protected $casts = [
        'issue_date' => 'date',
        'maturity_date' => 'date',
        'amount' => 'decimal:2',
        'client_id' => 'integer',
        'bank_account_id' => 'integer',
        'installment_count' => 'integer',
        'is_electronic' => 'boolean',
    ];

    /**
     * 배열/JSON 변환 시 날짜 형식 지정
     */
    public function toArray(): array
    {
        $array = parent::toArray();

        // 날짜 필드를 Y-m-d 형식으로 변환
        if (isset($array['issue_date']) && $this->issue_date) {
            $array['issue_date'] = $this->issue_date->format('Y-m-d');
        }
        if (isset($array['maturity_date']) && $this->maturity_date) {
            $array['maturity_date'] = $this->maturity_date->format('Y-m-d');
        }

        return $array;
    }

    /**
     * 어음 구분 목록
     */
    public const BILL_TYPES = [
        'received' => '수취',
        'issued' => '발행',
    ];

    /**
     * 수취 어음 상태 목록
     */
    public const RECEIVED_STATUSES = [
        'stored' => '보관중',
        'maturityAlert' => '만기입금(7일전)',
        'maturityResult' => '만기결과',
        'paymentComplete' => '결제완료',
        'dishonored' => '부도',
    ];

    /**
     * 발행 어음 상태 목록
     */
    public const ISSUED_STATUSES = [
        'stored' => '보관중',
        'maturityAlert' => '만기입금(7일전)',
        'collectionRequest' => '추심의뢰',
        'collectionComplete' => '추심완료',
        'suing' => '추소중',
        'dishonored' => '부도',
    ];

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

    /**
     * 입금/출금 계좌 관계
     */
    public function bankAccount(): BelongsTo
    {
        return $this->belongsTo(BankAccount::class);
    }

    /**
     * 차수 관계
     */
    public function installments(): HasMany
    {
        return $this->hasMany(BillInstallment::class);
    }

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

    /**
     * 거래처명 조회 (회원/비회원 통합)
     */
    public function getDisplayClientNameAttribute(): string
    {
        if ($this->client) {
            return $this->client->name;
        }

        return $this->client_name ?? '';
    }

    /**
     * 어음 구분 라벨
     */
    public function getBillTypeLabelAttribute(): string
    {
        return self::BILL_TYPES[$this->bill_type] ?? $this->bill_type;
    }

    /**
     * 상태 라벨
     */
    public function getStatusLabelAttribute(): string
    {
        if ($this->bill_type === 'received') {
            return self::RECEIVED_STATUSES[$this->status] ?? $this->status;
        }

        return self::ISSUED_STATUSES[$this->status] ?? $this->status;
    }

    /**
     * 만기까지 남은 일수
     */
    public function getDaysToMaturityAttribute(): int
    {
        return now()->diffInDays($this->maturity_date, false);
    }

    /**
     * 만기 7일 전 여부
     */
    public function isMaturityAlertPeriod(): bool
    {
        $days = $this->days_to_maturity;

        return $days >= 0 && $days <= 7;
    }
}