<?php

namespace App\Services\LemonSqueezy;

use App\Models\Package;
use App\Models\Tenant;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Log;

class LemonSqueezyCheckoutService
{
    public function __construct(
        private readonly LemonSqueezyClient $client,
    ) {}

    /**
     * @param  array{success_url?: string|null, return_url?: string|null, discount_code?: string|null, metadata?: array, custom_data?: array, customer_email?: string|null, customer_name?: string|null}  $options
     */
    public function createCheckout(Tenant $tenant, Package $package, array $options = []): array
    {
        $storeId = (string) config('lemonsqueezy.store_id');

        $customData = $this->buildCustomData(
            $tenant,
            $package,
            array_merge(
                $options['metadata'] ?? [],
                $options['custom_data'] ?? [],
                array_filter([
                    'success_url' => $options['success_url'] ?? null,
                    'return_url' => $options['return_url'] ?? null,
                ], static fn ($value) => $value !== null && $value !== '')
            )
        );

        return $this->createVariantCheckout((string) $package->lemonsqueezy_variant_id, $customData, $options + [
            'customer_email' => $options['customer_email'] ?? null,
            'customer_name' => $options['customer_name'] ?? null,
            'store_id' => $storeId,
        ]);
    }

    /**
     * @param  array{success_url?: string|null, return_url?: string|null, discount_code?: string|null, customer_email?: string|null, customer_name?: string|null, store_id?: string|null}  $options
     */
    public function createVariantCheckout(string $variantId, array $customData, array $options = []): array
    {
        $storeId = $options['store_id'] ?? (string) config('lemonsqueezy.store_id');

        $attributes = array_filter([
            'checkout_data' => array_filter([
                'custom' => $customData,
                'email' => $options['customer_email'] ?? null,
                'name' => $options['customer_name'] ?? null,
                'discount_code' => $options['discount_code'] ?? null,
            ], static fn ($value) => $value !== null && $value !== ''),
            'checkout_options' => [
                'embed' => true,
            ],
            'product_options' => array_filter([
                'redirect_url' => $options['success_url'] ?? null,
            ], static fn ($value) => $value !== null && $value !== ''),
            'test_mode' => (bool) config('lemonsqueezy.test_mode', false),
        ], static fn ($value) => $value !== null && $value !== '');

        $payload = [
            'data' => [
                'type' => 'checkouts',
                'attributes' => $attributes,
                'relationships' => [
                    'store' => [
                        'data' => [
                            'type' => 'stores',
                            'id' => $storeId,
                        ],
                    ],
                    'variant' => [
                        'data' => [
                            'type' => 'variants',
                            'id' => $variantId,
                        ],
                    ],
                ],
            ],
        ];

        $response = $this->client->post('/checkouts', $payload);

        $checkoutUrl = Arr::get($response, 'data.attributes.url')
            ?? Arr::get($response, 'data.attributes.checkout_url')
            ?? Arr::get($response, 'data.url')
            ?? Arr::get($response, 'url');

        if (! $checkoutUrl) {
            Log::warning('Lemon Squeezy checkout response missing url', ['response' => $response]);
        }

        return [
            'checkout_url' => $checkoutUrl,
            'expires_at' => Arr::get($response, 'data.attributes.expires_at'),
            'id' => Arr::get($response, 'data.id') ?? Arr::get($response, 'id'),
        ];
    }

    /**
     * @param  array<string, mixed>  $extra
     * @return array<string, string>
     */
    protected function buildCustomData(Tenant $tenant, Package $package, array $extra = []): array
    {
        $metadata = [
            'tenant_id' => (string) $tenant->id,
            'package_id' => (string) $package->id,
        ];

        foreach ($extra as $key => $value) {
            if (! is_string($key)) {
                continue;
            }

            if (is_scalar($value) || (is_object($value) && method_exists($value, '__toString'))) {
                $metadata[$key] = (string) $value;
            }
        }

        return $metadata;
    }
}