<?php

namespace App\Models\Barobill;

use Illuminate\Database\Eloquent\Model;

class BarobillPricingPolicy extends Model
{
    protected $table = 'barobill_pricing_policies';

    public const TYPE_CARD = 'card';

    public const TYPE_TAX_INVOICE = 'tax_invoice';

    public const TYPE_BANK_ACCOUNT = 'bank_account';

    protected $fillable = [
        'service_type',
        'name',
        'description',
        'free_quota',
        'free_quota_unit',
        'additional_unit',
        'additional_unit_label',
        'additional_price',
        'is_active',
        'sort_order',
    ];

    protected $casts = [
        'free_quota' => 'integer',
        'additional_unit' => 'integer',
        'additional_price' => 'integer',
        'is_active' => 'boolean',
        'sort_order' => 'integer',
    ];

    // =========================================================================
    // 스코프
    // =========================================================================

    public function scopeActive($query)
    {
        return $query->where('is_active', true);
    }

    // =========================================================================
    // 헬퍼 메서드
    // =========================================================================

    public static function getByServiceType(string $serviceType): ?self
    {
        return static::active()->where('service_type', $serviceType)->first();
    }

    public static function getAllActive()
    {
        return static::active()->orderBy('sort_order')->get();
    }

    public function getServiceTypeLabelAttribute(): string
    {
        return match ($this->service_type) {
            self::TYPE_CARD => '카드조회',
            self::TYPE_TAX_INVOICE => '전자세금계산서',
            self::TYPE_BANK_ACCOUNT => '계좌조회',
            default => $this->service_type,
        };
    }

    public function calculateBilling(int $usageCount): int
    {
        if ($usageCount <= $this->free_quota) {
            return 0;
        }

        $excess = $usageCount - $this->free_quota;
        $units = (int) ceil($excess / max($this->additional_unit, 1));

        return $units * $this->additional_price;
    }
}