<?php

namespace App\Enums;

/**
 * The billable tiers advertised on the pricing page. Prices are the annual
 * amount in cents (EUR); certificateLimit() is null for unlimited plans.
 */
enum SubscriptionPlan: string
{
    case Free = 'free';
    case Starter = 'starter';
    case Unlimited = 'unlimited';

    /**
     * The VAT rate baked into the advertised (incl. VAT) prices below.
     */
    private const VAT_RATE = 0.21;

    public function label(): string
    {
        return match ($this) {
            self::Free => __('Gratis'),
            self::Starter => 'Certified Starter',
            self::Unlimited => 'Certified Pro',
        };
    }

    public function certificateLimit(): ?int
    {
        return match ($this) {
            self::Free => 5,
            self::Starter => 15,
            self::Unlimited => null,
        };
    }

    /**
     * The net (excl. VAT) annual price — the amount invoiced via
     * Moneybird, which adds VAT on top via the configured tax rate.
     * Derived from priceInclVatCents() so the two can never drift apart.
     */
    public function priceInCents(): int
    {
        return (int) round($this->priceInclVatCents() / (1 + self::VAT_RATE));
    }

    /**
     * The advertised annual price, incl. 21% VAT — the headline figure
     * shown on the pricing and billing pages.
     */
    public function priceInclVatCents(): int
    {
        return match ($this) {
            self::Free => 0,
            self::Starter => 1900,
            self::Unlimited => 4900,
        };
    }

    /**
     * The line-item description used on Moneybird invoices.
     */
    public function moneybirdDescription(): string
    {
        return match ($this) {
            self::Free => 'Certified — Gratis',
            self::Starter => 'Certified Starter — jaarabonnement (1 jaar)',
            self::Unlimited => 'Certified Pro — jaarabonnement (1 jaar)',
        };
    }

    public function isPaid(): bool
    {
        return $this !== self::Free;
    }

    /**
     * Whether this plan includes document scanning (OCR). Free accounts
     * enter certificate details manually; OCR is a paid-plan perk.
     */
    public function includesOcr(): bool
    {
        return $this !== self::Free;
    }
}