<?php

namespace App\Models;

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

class QrWallet extends Model
{
    public const STATUS_ACTIVE = 'active';
    public const STATUS_SUSPENDED = 'suspended';

    protected $fillable = [
        'user_id',
        'credit_balance',
        'qr_codes_total',
        'scans_total',
        'status',
    ];

    protected $casts = [
        'credit_balance' => 'decimal:4',
        'qr_codes_total' => 'integer',
        'scans_total' => 'integer',
    ];

    public static function pricePerQr(): float
    {
        return (float) config('qr.price_per_qr_ghs', 5.0);
    }

    public static function minTopupGhs(): float
    {
        return (float) config('qr.min_topup_ghs', 5.0);
    }

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

    public function transactions(): HasMany
    {
        return $this->hasMany(QrTransaction::class)->latest();
    }

    /**
     * Single-wallet (siloing step 2): QR spends from the one UserWallet (tagged
     * 'qr'). Delegates to the billing service (lazily folds any legacy
     * credit_balance in). `spendableBalance()` is the unified balance for display.
     */
    public function spendableBalance(): float
    {
        return $this->user
            ? app(\App\Services\Qr\QrWalletBillingService::class)->balanceCedis($this->user)
            : (float) $this->credit_balance;
    }

    public function canCreateQr(): bool
    {
        return $this->user
            ? app(\App\Services\Qr\QrWalletBillingService::class)->canCreate($this->user)
            : false;
    }
}