<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class Avoir extends Model
{
    use HasFactory;

    protected $fillable = [
        'client_id',
        'invoice_id',
        'group_id',
        'avoir_number',
        'status',
        'avoir_date',
        'due_date',
        'currency',
        'total_ht',
        'total_tva',
        'total_ttc',
        'reason_type',
        'reason_description',
        'e_invoice_status',
        'refund_status',
        'refund_date',
        'refund_method',
        'compensation_invoice_id',
        'compensation_amount',
    ];

    protected $casts = [
        'avoir_date' => 'date',
        'due_date' => 'date',
        'refund_date' => 'date',
        'total_ht' => 'decimal:2',
        'total_tva' => 'decimal:2',
        'total_ttc' => 'decimal:2',
        'compensation_amount' => 'decimal:2',
    ];

    protected static function booted()
    {
        static::creating(function ($avoir) {
            // Auto-generate avoir number if not provided
            if (empty($avoir->avoir_number)) {
                $prefix = 'AV-' . now()->format('Ym') . '-';
                $lastAvoir = self::where('avoir_number', 'like', $prefix . '%')
                    ->orderBy('avoir_number', 'desc')
                    ->first();

                if ($lastAvoir) {
                    // Extract numeric part
                    preg_match('/(\d+)$/', $lastAvoir->avoir_number, $matches);
                    $newNumber = $matches ? intval($matches[1]) + 1 : 1;
                } else {
                    $newNumber = 1;
                }

                $avoir->avoir_number = $prefix . str_pad((string)$newNumber, 4, '0', STR_PAD_LEFT);
            }
        });
    }

    public function client()
    {
        return $this->belongsTo(Client::class);
    }

    public function invoice()
    {
        return $this->belongsTo(Invoice::class);
    }

    public function group()
    {
        return $this->belongsTo(ClientGroup::class, 'group_id');
    }

    public function lines()
    {
        return $this->hasMany(AvoirLine::class);
    }

    public function compensationInvoice()
    {
        return $this->belongsTo(Invoice::class, 'compensation_invoice_id');
    }

    public function history()
    {
        return $this->hasMany(DocumentStatusHistory::class, 'document_id')
                    ->where('document_type', 'avoir')
                    ->orderBy('changed_at', 'desc');
    }
}