<?php

namespace App\Models\Estimate;

use App\Models\Commons\Category;
use App\Traits\BelongsToTenant;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Relations\BelongsTo;
use Illuminate\Database\Eloquent\Relations\HasMany;
use Illuminate\Database\Eloquent\SoftDeletes;

class Estimate extends Model
{
    use BelongsToTenant, HasFactory, SoftDeletes;

    protected $fillable = [
        'tenant_id',
        'model_set_id',
        'estimate_no',
        'estimate_name',
        'customer_name',
        'project_name',
        'parameters',
        'calculated_results',
        'bom_data',
        'total_amount',
        'status',
        'notes',
        'valid_until',
        'created_by',
        'updated_by',
        'deleted_by',
    ];

    protected $casts = [
        'parameters' => 'array',
        'calculated_results' => 'array',
        'bom_data' => 'array',
        'total_amount' => 'decimal:2',
        'valid_until' => 'date',
        'created_at' => 'datetime',
        'updated_at' => 'datetime',
        'deleted_at' => 'datetime',
    ];

    /**
     * 모델셋 관계 (카테고리)
     */
    public function modelSet(): BelongsTo
    {
        return $this->belongsTo(Category::class, 'model_set_id');
    }

    /**
     * 견적 항목들
     */
    public function items(): HasMany
    {
        return $this->hasMany(EstimateItem::class);
    }

    /**
     * 견적 번호 자동 생성
     */
    public static function generateEstimateNo(int $tenantId): string
    {
        $prefix = 'EST';
        $date = now()->format('Ymd');

        $lastEstimate = self::where('tenant_id', $tenantId)
            ->whereDate('created_at', today())
            ->orderBy('id', 'desc')
            ->first();

        $sequence = $lastEstimate ? (int) substr($lastEstimate->estimate_no, -3) + 1 : 1;

        return $prefix.$date.str_pad($sequence, 3, '0', STR_PAD_LEFT);
    }

    /**
     * 견적 상태별 스코프
     */
    public function scopeDraft($query)
    {
        return $query->where('status', 'DRAFT');
    }

    public function scopeSent($query)
    {
        return $query->where('status', 'SENT');
    }

    public function scopeApproved($query)
    {
        return $query->where('status', 'APPROVED');
    }

    /**
     * 만료된 견적 스코프
     */
    public function scopeExpired($query)
    {
        return $query->whereNotNull('valid_until')
            ->where('valid_until', '<', now());
    }
}