<?php

namespace App\Models;

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

class ExchangeRateHistory extends Model
{
    protected $table = 'exchange_rate_history';

    protected $fillable = [
        'currency_from',
        'currency_to',
        'old_rate',
        'new_rate',
        'change_percent',
        'change_source',
        'status',
        'changed_by',
        'approved_by',
        'approved_at',
        'api_source',
        'notes',
    ];

    protected $casts = [
        'old_rate' => 'decimal:2',
        'new_rate' => 'decimal:2',
        'change_percent' => 'decimal:4',
        'approved_at' => 'datetime',
    ];

    public function changedBy(): BelongsTo
    {
        return $this->belongsTo(User::class, 'changed_by');
    }

    public function approvedBy(): BelongsTo
    {
        return $this->belongsTo(User::class, 'approved_by');
    }

    // ─── Helpers ───────────────────────────────────

    public function isPending(): bool
    {
        return $this->status === 'pending';
    }

    public function isApproved(): bool
    {
        return $this->status === 'approved';
    }
}