<?php

namespace App\Models;

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

class AiUsageLedger extends Model
{
    use HasFactory;

    public const TYPE_DEBIT = 'debit';

    public const TYPE_CREDIT = 'credit';

    public const TYPE_REFUND = 'refund';

    public const TYPE_ADJUSTMENT = 'adjustment';

    protected $fillable = [
        'tenant_id',
        'event_id',
        'request_id',
        'entry_type',
        'quantity',
        'unit_cost_usd',
        'amount_usd',
        'currency',
        'package_context',
        'notes',
        'recorded_at',
        'metadata',
    ];

    protected function casts(): array
    {
        return [
            'unit_cost_usd' => 'decimal:5',
            'amount_usd' => 'decimal:5',
            'recorded_at' => 'datetime',
            'metadata' => 'array',
        ];
    }

    public function tenant(): BelongsTo
    {
        return $this->belongsTo(Tenant::class);
    }

    public function event(): BelongsTo
    {
        return $this->belongsTo(Event::class);
    }

    public function request(): BelongsTo
    {
        return $this->belongsTo(AiEditRequest::class, 'request_id');
    }
}