<?php

namespace App\Services\LemonSqueezy;

use Illuminate\Support\Arr;

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

    /**
     * @return array{data: array<int, array<string, mixed>>, meta: array<string, mixed>}
     */
    public function listForCustomer(string $customerId, array $query = []): array
    {
        $payload = array_filter(array_merge([
            'filter[customer_id]' => $customerId,
            'sort' => '-created_at',
        ], $query), static fn ($value) => $value !== null && $value !== '');

        $response = $this->client->get('/orders', $payload);

        $orders = Arr::get($response, 'data', []);
        $meta = Arr::get($response, 'meta', []);

        if (! is_array($orders)) {
            $orders = [];
        }

        return [
            'data' => array_map([$this, 'mapOrder'], $orders),
            'meta' => $this->mapPagination($meta),
        ];
    }

    /**
     * @return array<string, mixed>
     */
    public function retrieve(string $orderId): array
    {
        $response = $this->client->get("/orders/{$orderId}");
        $order = Arr::get($response, 'data');

        return is_array($order) ? $order : (is_array($response) ? $response : []);
    }

    /**
     * @return array<string, mixed>|null
     */
    public function findByCheckoutId(string $checkoutId): ?array
    {
        $response = $this->client->get("/checkouts/{$checkoutId}");
        $checkout = Arr::get($response, 'data');

        if (! is_array($checkout)) {
            return null;
        }

        $orderId = Arr::get($checkout, 'attributes.order_id');
        if (! $orderId) {
            return null;
        }

        return $this->retrieve((string) $orderId);
    }

    /**
     * Issue a refund for a Lemon Squeezy order.
     *
     * @param  array{reason?: string|null}  $options
     * @return array<string, mixed>
     */
    public function refund(string $orderId, array $options = []): array
    {
        $payload = [
            'data' => [
                'type' => 'refunds',
                'attributes' => array_filter([
                    'order_id' => $orderId,
                    'reason' => $options['reason'] ?? null,
                ], static fn ($value) => $value !== null && $value !== ''),
            ],
        ];

        return $this->client->post('/refunds', $payload);
    }

    /**
     * @param  array<string, mixed>  $order
     * @return array<string, mixed>
     */
    protected function mapOrder(array $order): array
    {
        $attributes = Arr::get($order, 'attributes', []);

        return [
            'id' => $order['id'] ?? null,
            'order_number' => $attributes['order_number'] ?? null,
            'status' => $attributes['status'] ?? null,
            'amount' => $this->convertAmount($attributes['subtotal'] ?? null),
            'currency' => $attributes['currency'] ?? 'EUR',
            'origin' => 'lemonsqueezy',
            'checkout_id' => $attributes['checkout_id'] ?? null,
            'created_at' => $attributes['created_at'] ?? null,
            'updated_at' => $attributes['updated_at'] ?? null,
            'receipt_url' => Arr::get($attributes, 'urls.receipt'),
            'tax' => $this->convertAmount($attributes['tax'] ?? null),
            'grand_total' => $this->convertAmount($attributes['total'] ?? null),
        ];
    }

    /**
     * @param  array<string, mixed>  $meta
     * @return array<string, mixed>
     */
    protected function mapPagination(array $meta): array
    {
        $page = Arr::get($meta, 'page', []);
        $current = (int) ($page['currentPage'] ?? $page['current_page'] ?? 1);
        $totalPages = (int) ($page['totalPages'] ?? $page['total_pages'] ?? 1);

        return [
            'next' => $current < $totalPages ? (string) ($current + 1) : null,
            'previous' => $current > 1 ? (string) ($current - 1) : null,
            'has_more' => $current < $totalPages,
        ];
    }

    protected function convertAmount(mixed $value): ?float
    {
        if ($value === null || $value === '') {
            return null;
        }

        if (is_array($value) && isset($value['amount'])) {
            $value = $value['amount'];
        }

        if (is_string($value)) {
            $value = preg_replace('/[^0-9.-]/', '', $value);
        }

        if ($value === '' || $value === null) {
            return null;
        }

        $amount = (float) $value;

        return $amount / 100;
    }
}