<?php

namespace App\Services\GiftVouchers;

use App\Services\LemonSqueezy\LemonSqueezyCheckoutService;
use Illuminate\Support\Facades\App;
use Illuminate\Support\Str;
use Illuminate\Validation\ValidationException;

class GiftVoucherCheckoutService
{
    public function __construct(private readonly LemonSqueezyCheckoutService $checkout) {}

    /**
     * @return array<int, array{key:string,label:string,amount:float,currency:string,lemonsqueezy_variant_id?:string|null,can_checkout:bool}>
     */
    public function tiers(): array
    {
        return collect(config('gift-vouchers.tiers', []))
            ->map(function (array $tier): array {
                $currency = Str::upper($tier['currency'] ?? 'EUR');
                $variantId = $tier['lemonsqueezy_variant_id'] ?? null;

                return [
                    'key' => $tier['key'],
                    'label' => $tier['label'],
                    'amount' => (float) $tier['amount'],
                    'currency' => $currency,
                    'lemonsqueezy_variant_id' => $variantId,
                    'can_checkout' => ! empty($variantId),
                ];
            })
            ->values()
            ->all();
    }

    /**
     * @param  array{tier_key:string,purchaser_email:string,recipient_email?:string|null,recipient_name?:string|null,message?:string|null,success_url?:string|null,return_url?:string|null}  $data
     * @return array{checkout_url:?string,expires_at:?string,id:?string}
     */
    public function create(array $data): array
    {
        $tier = $this->findTier($data['tier_key']);

        if (! $tier || empty($tier['lemonsqueezy_variant_id'])) {
            throw ValidationException::withMessages([
                'tier_key' => __('Gift voucher is not available right now.'),
            ]);
        }

        $customData = array_filter([
            'type' => 'gift_voucher',
            'tier_key' => $tier['key'],
            'purchaser_email' => $data['purchaser_email'],
            'recipient_email' => $data['recipient_email'] ?? null,
            'recipient_name' => $data['recipient_name'] ?? null,
            'message' => $data['message'] ?? null,
            'app_locale' => App::getLocale(),
            'success_url' => $data['success_url'] ?? null,
            'return_url' => $data['return_url'] ?? null,
            'lemonsqueezy_variant_id' => $tier['lemonsqueezy_variant_id'],
        ], static fn ($value) => $value !== null && $value !== '');

        return $this->checkout->createVariantCheckout(
            (string) $tier['lemonsqueezy_variant_id'],
            $customData,
            [
                'success_url' => $data['success_url'] ?? null,
                'return_url' => $data['return_url'] ?? null,
                'customer_email' => $data['purchaser_email'],
            ]
        );
    }

    /**
     * @return array<string, mixed>|null
     */
    protected function findTier(string $key): ?array
    {
        $tiers = collect(config('gift-vouchers.tiers', []))
            ->keyBy('key');

        $tier = $tiers->get($key);

        if (! $tier) {
            return null;
        }

        $tier['currency'] = Str::upper($tier['currency'] ?? 'EUR');

        return $tier;
    }
}