<?php

namespace App\Enums\Product;

use App\Support\BillingCycleCatalog;

enum ProductBillingCycle: string
{
    case ONE_TIME = 'onetime';
    case MONTHLY = 'monthly';
    case QUARTERLY = 'quarterly';
    case SEMI_ANNUALLY = 'semi_annually';
    case ANNUALLY = 'annually';
    case BIENNIALLY = 'biennially';
    case TRIENNIALLY = 'triennially';

    public function label(): string
    {
        return match ($this) {
            self::ONE_TIME => 'One Time',
            self::MONTHLY => 'Monthly',
            self::QUARTERLY => 'Quarterly',
            self::SEMI_ANNUALLY => 'Semi Annually',
            self::ANNUALLY => 'Annually',
            self::BIENNIALLY => 'Biennially',
            self::TRIENNIALLY => 'Triennially',
        };
    }

    public function vietnameseLabel(): string
    {
        return match ($this) {
            self::ONE_TIME => 'Một lần',
            self::MONTHLY => 'Hàng tháng',
            self::QUARTERLY => '3 tháng',
            self::SEMI_ANNUALLY => '6 tháng',
            self::ANNUALLY => 'Hàng năm',
            self::BIENNIALLY => '2 năm',
            self::TRIENNIALLY => '3 năm',
        };
    }

    public static function vietnameseLabelFor(?string $code): string
    {
        return self::tryFrom((string) $code)?->vietnameseLabel()
            ?? BillingCycleCatalog::labelForCode($code)
            ?? ($code ?: 'N/A');
    }

    public static function vietnameseLabelForMonths(int $months): string
    {
        $cycle = collect(self::cases())->first(fn (self $case) => $case->months() === $months && $months > 0);

        return $cycle?->vietnameseLabel() ?? BillingCycleCatalog::labelForMonths($months);
    }

    public function months(): int
    {
        return match ($this) {
            self::ONE_TIME => 0,
            self::MONTHLY => 1,
            self::QUARTERLY => 3,
            self::SEMI_ANNUALLY => 6,
            self::ANNUALLY => 12,
            self::BIENNIALLY => 24,
            self::TRIENNIALLY => 36,
        };
    }

    /**
     * Resolve from the legacy admin integer billing code:
     *   2 → monthly, 3 → quarterly, 4 → semi_annually, 5 → annually
     */
    public static function fromLegacyCode(int $code): self
    {
        return match ($code) {
            2 => self::MONTHLY,
            3 => self::QUARTERLY,
            4 => self::SEMI_ANNUALLY,
            5 => self::ANNUALLY,
            6 => self::BIENNIALLY,
            7 => self::TRIENNIALLY,
            default => self::MONTHLY,
        };
    }
}