<?php

namespace App\Models;

use App\Enums\PaymentType;
use Illuminate\Database\Eloquent\Concerns\HasUuids;
use Illuminate\Database\Eloquent\Factories\HasFactory;
use Illuminate\Database\Eloquent\Model;

class PaymentScheduleItem extends Model
{
    use HasUuids, HasFactory;

    protected $guarded = [];

    protected $casts = [
        'type' => PaymentType::class,
        'amount' => 'decimal:2',
        'percentage' => 'decimal:2',
        'due_date' => 'date',
    ];

    public function getPaidAmountAttribute(): float
    {
        // Nếu đã eager load payments, dùng collection sum để tránh query thêm
        if ($this->relationLoaded('payments')) {
            return (float) $this->payments->sum('amount');
        }

        return (float) $this->payments()->sum('amount');
    }

    public function getRemainingAmountAttribute(): float
    {
        return (float) $this->amount - $this->paid_amount;
    }

    public function template()
    {
        return $this->belongsTo(PaymentTemplate::class);
    }

    public function schedule()
    {
        return $this->belongsTo(PaymentSchedule::class);
    }

    public function payments()
    {
        return $this->hasMany(Payment::class, 'schedule_item_id');
    }
}