<?php

namespace App\Services\Hosting;

use App\Models\HostingOrder;
use Illuminate\Http\Client\Response;
use Illuminate\Support\Arr;
use Illuminate\Support\Facades\Http;
use Illuminate\Support\Facades\Log;

class ResellerClubHostingService
{
    private const DEFAULT_API_URL = 'https://httpapi.com/api';

    private ?string $lastSyncError = null;

    private string $apiUrl;

    private string $hostingEndpoint;

    private string $authUserId;

    private string $apiKey;

    private string $customerId;

    public function __construct()
    {
        $this->apiUrl = rtrim($this->configuredApiUrl(), '/');
        $this->hostingEndpoint = trim((string) config('mailinfra.hosting_endpoint', 'singledomainhosting/linux/us'), '/');
        $this->authUserId = (string) config('mailinfra.registrar_auth_userid');
        $this->apiKey = (string) config('mailinfra.registrar_api_key');
        $this->customerId = (string) config('mailinfra.registrar_customer_id');
    }

    public function isConfigured(): bool
    {
        return $this->authUserId !== '' && $this->apiKey !== '';
    }

    public function lastSyncError(): ?string
    {
        return $this->lastSyncError;
    }

    /**
     * Build a URL with all parameters as query string values, including auth.
     *
     * @param  array<string, mixed>  $params
     */
    private function buildQueryUrl(string $endpoint, array $params = []): string
    {
        $all = array_merge([
            'auth-userid' => $this->authUserId,
            'api-key' => $this->apiKey,
        ], $params);

        $separator = str_contains($endpoint, '?') ? '&' : '?';

        return $endpoint.$separator.http_build_query($all);
    }

    /**
     * Authenticate a ResellerClub customer by email and password.
     * Returns the customer ID on success, or null on failure.
     *
     * @return array{success: bool, customer_id?: string, message?: string}
     */
    public function authenticateCustomer(string $email, string $password): array
    {
        try {
            $response = Http::timeout(15)->post($this->buildQueryUrl($this->apiUrl.'/customers/authenticate.json', [
                'username' => $email,
                'passwd' => $password,
            ]));

            $data = $response->json();

            if ($response->failed()) {
                $message = $data['message'] ?? $data['error'] ?? 'Authentication failed.';

                return ['success' => false, 'message' => $message];
            }

            // RC returns the customer ID directly as the response body on success
            $customerId = is_array($data) ? (string) ($data['customerid'] ?? '') : (string) $data;

            if ($customerId === '' || $customerId === 'false') {
                return ['success' => false, 'message' => 'Invalid email or password.'];
            }

            return ['success' => true, 'customer_id' => $customerId];
        } catch (\Throwable $e) {
            Log::error('HostingService: authenticateCustomer failed', ['error' => $e->getMessage()]);

            return ['success' => false, 'message' => 'Could not verify ResellerClub credentials.'];
        }
    }

    /**
     * Get customer details by customer ID.
     *
     * @return array{success: bool, customer?: array, message?: string}
     */
    public function getCustomerDetails(string $customerId): array
    {
        try {
            $response = Http::timeout(15)->get($this->apiUrl.'/customers/details-by-id.json', [
                'auth-userid' => $this->authUserId,
                'api-key' => $this->apiKey,
                'customer-id' => $customerId,
            ]);

            $data = $response->json();

            if ($response->failed() || ! is_array($data)) {
                return ['success' => false, 'message' => 'Could not fetch customer details.'];
            }

            return ['success' => true, 'customer' => $data];
        } catch (\Throwable $e) {
            Log::error('HostingService: getCustomerDetails failed', ['error' => $e->getMessage()]);

            return ['success' => false, 'message' => 'Could not fetch customer details.'];
        }
    }

    /**
     * Search hosting orders for a specific customer.
     *
     * @return array{success: bool, orders?: array, total?: int, message?: string}
     */
    public function searchOrdersByCustomer(string $customerId, int $page = 1, int $perPage = 50): array
    {
        $this->lastSyncError = null;

        try {
            $params = [
                'auth-userid' => $this->authUserId,
                'api-key' => $this->apiKey,
                'no-of-records' => $perPage,
                'page-no' => $page,
                'customer-id' => $customerId,
            ];

            $response = Http::timeout(15)->get($this->endpoint('search'), $params);
            $data = $response->json();

            if ($response->failed() || ! is_array($data)) {
                $message = $this->responseMessage($response, $data, 'Failed to search hosting orders.');
                $this->lastSyncError = $message;

                Log::warning('HostingService: hosting search unsuccessful response', [
                    'customer_id' => $customerId,
                    'status' => $response->status(),
                    'body' => $this->sanitizeErrorText((string) $response->body()),
                ]);

                return ['success' => false, 'message' => $message];
            }

            $total = (int) ($data['recsonpage'] ?? 0);
            $orders = [];
            $recordCount = (int) ($data['recsindb'] ?? 0);

            for ($i = 1; $i <= $total; $i++) {
                if (isset($data[(string) $i])) {
                    $orders[] = $this->normalizeOrderData($data[(string) $i]);
                }
            }

            return [
                'success' => true,
                'orders' => $orders,
                'total' => $recordCount,
            ];
        } catch (\Throwable $e) {
            Log::error('HostingService: searchOrdersByCustomer failed', ['error' => $e->getMessage()]);

            $message = $this->syncErrorMessage($e, 'Could not fetch hosting orders.');
            $this->lastSyncError = $message;

            return ['success' => false, 'message' => $message];
        }
    }

    /**
     * Sync all orders for a specific RC customer into a Ladill user account.
     *
     * @return int Number of orders synced.
     */
    public function syncCustomerOrders(string $customerId, int $userId): int
    {
        $this->lastSyncError = null;

        $page = 1;
        $synced = 0;

        do {
            $result = $this->searchOrdersByCustomer($customerId, $page, 50);

            if (! ($result['success'] ?? false) || empty($result['orders'])) {
                break;
            }

            foreach ($result['orders'] as $order) {
                $payload = is_array($order) ? ($order['raw'] ?? $order) : [];
                $orderId = (string) ($payload['orderid'] ?? $payload['entityid'] ?? $order['order_id'] ?? '');

                if ($orderId !== '') {
                    $details = $this->getOrderDetails($orderId);
                    if (($details['success'] ?? false) && is_array($details['order'] ?? null)) {
                        $payload = (array) ($details['order']['raw'] ?? $details['order']);
                    }
                }

                $this->syncOrderToLocal((array) $payload, $userId);
                $synced++;
            }

            $page++;
        } while ($synced < ($result['total'] ?? 0));

        return $synced;
    }

    /**
     * Search hosting orders under the reseller account.
     *
     * @return array{success: bool, orders?: array, total?: int, message?: string}
     */
    public function searchOrders(int $page = 1, int $perPage = 25, ?string $domainName = null, ?string $status = null): array
    {
        try {
            $params = [
                'auth-userid' => $this->authUserId,
                'api-key' => $this->apiKey,
                'no-of-records' => $perPage,
                'page-no' => $page,
            ];

            if ($domainName) {
                $params['domain-name'] = $domainName;
            }

            if ($status) {
                $params['status'] = $status;
            }

            if ($this->customerId) {
                $params['customer-id'] = $this->customerId;
            }

            $response = Http::timeout(15)->get($this->endpoint('search'), $params);
            $data = $response->json();

            if ($response->failed() || ! is_array($data)) {
                $message = $this->responseMessage($response, $data, 'Failed to search hosting orders.');

                Log::warning('HostingService: hosting search unsuccessful response', [
                    'status' => $response->status(),
                    'body' => $this->sanitizeErrorText((string) $response->body()),
                ]);

                return ['success' => false, 'message' => $message];
            }

            $total = (int) ($data['recsonpage'] ?? 0);
            $orders = [];

            // RC returns numbered keys for each record
            $recordCount = (int) ($data['recsindb'] ?? 0);
            for ($i = 1; $i <= $total; $i++) {
                if (isset($data[(string) $i])) {
                    $orders[] = $this->normalizeOrderData($data[(string) $i]);
                }
            }

            return [
                'success' => true,
                'orders' => $orders,
                'total' => $recordCount,
            ];
        } catch (\Throwable $e) {
            Log::error('HostingService: searchOrders failed', ['error' => $e->getMessage()]);

            return ['success' => false, 'message' => 'Could not fetch hosting orders.'];
        }
    }

    /**
     * Get details of a specific hosting order by order ID.
     *
     * @return array{success: bool, order?: array, message?: string}
     */
    public function getOrderDetails(string $orderId): array
    {
        try {
            $response = Http::timeout(15)->get($this->endpoint('details'), [
                'auth-userid' => $this->authUserId,
                'api-key' => $this->apiKey,
                'order-id' => $orderId,
            ]);

            $data = $response->json();

            if ($response->failed() || ! is_array($data)) {
                return ['success' => false, 'message' => 'Failed to fetch order details.'];
            }

            return [
                'success' => true,
                'order' => $this->normalizeOrderData($data),
            ];
        } catch (\Throwable $e) {
            Log::error('HostingService: getOrderDetails failed', [
                'order_id' => $orderId,
                'error' => $e->getMessage(),
            ]);

            return ['success' => false, 'message' => 'Could not fetch order details.'];
        }
    }

    private function configuredApiUrl(): string
    {
        $value = trim((string) config('mailinfra.hosting_api_url'));

        return $value !== '' ? $value : self::DEFAULT_API_URL;
    }

    private function endpoint(string $action): string
    {
        return sprintf('%s/%s/%s.json', $this->apiUrl, $this->hostingEndpoint, $action);
    }

    /**
     * Order a new single-domain Linux hosting plan.
     *
     * @return array{success: bool, order_id?: string, message?: string}
     */
    public function orderHosting(string $domainName, string $planId, string $customerId, int $months = 1): array
    {
        try {
            $response = Http::timeout(30)->post($this->buildQueryUrl($this->endpoint('add'), [
                'domain-name' => $domainName,
                'customer-id' => $customerId,
                'months' => $months,
                'plan-id' => $planId,
                'invoice-option' => 'NoInvoice',
            ]));

            $data = $response->json();

            if ($response->failed()) {
                $message = $data['message'] ?? $data['error'] ?? 'Hosting order failed.';
                Log::warning('HostingService: orderHosting failed', [
                    'domain' => $domainName,
                    'status' => $response->status(),
                    'response' => $data,
                ]);

                return ['success' => false, 'message' => $message];
            }

            Log::info('HostingService: hosting ordered', [
                'domain' => $domainName,
                'order_id' => $data['entityid'] ?? null,
            ]);

            return [
                'success' => true,
                'order_id' => (string) ($data['entityid'] ?? ''),
            ];
        } catch (\Throwable $e) {
            Log::error('HostingService: orderHosting exception', [
                'domain' => $domainName,
                'error' => $e->getMessage(),
            ]);

            return ['success' => false, 'message' => 'Hosting order failed due to a network error.'];
        }
    }

    /**
     * Renew a hosting order.
     *
     * @return array{success: bool, message?: string}
     */
    public function renewOrder(string $orderId, int $months = 1, string $invoiceOption = 'NoInvoice'): array
    {
        try {
            $response = Http::timeout(30)->post($this->buildQueryUrl($this->endpoint('renew'), [
                'order-id' => $orderId,
                'months' => $months,
                'invoice-option' => $invoiceOption,
            ]));

            $data = $response->json();

            if ($response->failed()) {
                return ['success' => false, 'message' => $data['message'] ?? 'Renewal failed.'];
            }

            return ['success' => true];
        } catch (\Throwable $e) {
            Log::error('HostingService: renewOrder failed', [
                'order_id' => $orderId,
                'error' => $e->getMessage(),
            ]);

            return ['success' => false, 'message' => 'Renewal failed due to a network error.'];
        }
    }

    /**
     * @return array{success: bool, message?: string}
     */
    public function changePanelPassword(string $orderId, string $password): array
    {
        try {
            $response = Http::timeout(15)->post($this->buildQueryUrl($this->endpoint('change-password'), [
                'order-id' => $orderId,
                'new-passwd' => $password,
            ]));

            $data = $response->json();

            if ($response->failed()) {
                return ['success' => false, 'message' => $data['message'] ?? $data['error'] ?? 'Could not update the hosting panel password.'];
            }

            return ['success' => true];
        } catch (\Throwable $e) {
            Log::error('HostingService: changePanelPassword failed', [
                'order_id' => $orderId,
                'error' => $e->getMessage(),
            ]);

            return ['success' => false, 'message' => 'Could not update the hosting panel password.'];
        }
    }

    /**
     * Delete (cancel) a hosting order.
     *
     * @return array{success: bool, message?: string}
     */
    public function deleteOrder(string $orderId): array
    {
        try {
            $response = Http::timeout(15)->post($this->buildQueryUrl($this->endpoint('delete'), [
                'order-id' => $orderId,
            ]));

            $data = $response->json();

            if ($response->failed()) {
                return ['success' => false, 'message' => $data['message'] ?? 'Cancellation failed.'];
            }

            return ['success' => true];
        } catch (\Throwable $e) {
            Log::error('HostingService: deleteOrder failed', [
                'order_id' => $orderId,
                'error' => $e->getMessage(),
            ]);

            return ['success' => false, 'message' => 'Cancellation failed due to a network error.'];
        }
    }

    /**
     * Sync a hosting order from ResellerClub into the local database.
     */
    public function syncOrderToLocal(array $rcOrder, int $userId, ?int $domainId = null): HostingOrder
    {
        $raw = is_array($rcOrder['raw'] ?? null) ? (array) $rcOrder['raw'] : [];

        return HostingOrder::query()->updateOrCreate(
            ['rc_order_id' => (string) ($rcOrder['orderid'] ?? $rcOrder['order_id'] ?? $rcOrder['entityid'] ?? Arr::get($raw, 'orders.orderid') ?? Arr::get($raw, 'entity.entityid') ?? $raw['orderid'] ?? $raw['entityid'] ?? '')],
            [
                'user_id' => $userId,
                'domain_id' => $domainId,
                'domain_name' => $rcOrder['domain_name'] ?? $rcOrder['domainname'] ?? Arr::get($raw, 'entity.description') ?? Arr::get($raw, 'domainname') ?? Arr::get($raw, 'domain-name') ?? '',
                'rc_customer_id' => (string) ($rcOrder['customerid'] ?? $rcOrder['customer_id'] ?? $rcOrder['customer-id'] ?? Arr::get($raw, 'entity.customerid') ?? $raw['customerid'] ?? $raw['customer-id'] ?? ''),
                'plan_name' => $rcOrder['plan_name'] ?? $rcOrder['planname'] ?? $rcOrder['productcategory'] ?? Arr::get($raw, 'entitytype.entitytypename') ?? Arr::get($raw, 'entitytype.entitytypekey') ?? $raw['planname'] ?? $raw['productcategory'] ?? null,
                'hosting_type' => HostingOrder::TYPE_SINGLE_DOMAIN,
                'status' => $this->mapRcStatus($rcOrder['currentstatus'] ?? $rcOrder['orderstatus'] ?? $rcOrder['status'] ?? Arr::get($raw, 'entity.currentstatus') ?? Arr::get($raw, 'orders.orderstatus') ?? 'pending'),
                'ip_address' => $rcOrder['ipaddress'] ?? $rcOrder['ip'] ?? $rcOrder['ip_address'] ?? Arr::get($raw, 'server.ipaddress') ?? Arr::get($raw, 'server.ip') ?? $raw['ipaddress'] ?? $raw['ip'] ?? null,
                'cpanel_url' => $rcOrder['cpanelurl'] ?? $rcOrder['cpanel_url'] ?? $rcOrder['tempurl'] ?? Arr::get($raw, 'server.cpanelurl') ?? Arr::get($raw, 'server.controlpanelurl') ?? Arr::get($raw, 'server.tempurl') ?? $raw['cpanelurl'] ?? $raw['tempurl'] ?? null,
                'cpanel_username' => $rcOrder['cpanelusername'] ?? $rcOrder['cpanel_username'] ?? Arr::get($raw, 'server.cpanelusername') ?? Arr::get($raw, 'server.username') ?? $raw['cpanelusername'] ?? null,
                'bandwidth_mb' => $this->unsignedLimitOrNull($rcOrder['bandwidth'] ?? Arr::get($raw, 'plan.bandwidth') ?? $raw['bandwidth'] ?? null),
                'disk_space_mb' => $this->unsignedLimitOrNull($rcOrder['diskspace'] ?? Arr::get($raw, 'plan.diskspace') ?? $raw['diskspace'] ?? null),
                'expires_at' => $this->hostingTimestamp($rcOrder['endtime'] ?? $rcOrder['end_time'] ?? Arr::get($raw, 'orders.endtime') ?? $raw['endtime'] ?? null),
                'provisioned_at' => $this->hostingTimestamp($rcOrder['creationtime'] ?? $rcOrder['creation_time'] ?? Arr::get($raw, 'orders.creationtime') ?? $raw['creationtime'] ?? null),
                'meta' => $raw !== [] ? $raw : $rcOrder,
            ]
        );
    }

    /**
     * Sync all orders from ResellerClub for a user.
     * If user has a linked RC account, only syncs that customer's orders.
     * Otherwise syncs all orders under the reseller account.
     *
     * @return int Number of orders synced.
     */
    public function syncAllOrders(int $userId, ?string $rcCustomerId = null): int
    {
        if ($rcCustomerId) {
            return $this->syncCustomerOrders($rcCustomerId, $userId);
        }

        $page = 1;
        $synced = 0;

        do {
            $result = $this->searchOrders($page, 50);

            if (! ($result['success'] ?? false) || empty($result['orders'])) {
                break;
            }

            foreach ($result['orders'] as $order) {
                $this->syncOrderToLocal($order, $userId);
                $synced++;
            }

            $page++;
        } while ($synced < ($result['total'] ?? 0));

        return $synced;
    }

    private function normalizeOrderData(array $data): array
    {
        return [
            'order_id' => (string) ($data['orderid'] ?? $data['entityid'] ?? $data['order-id'] ?? $data['entity-id'] ?? Arr::get($data, 'orders.orderid') ?? Arr::get($data, 'entity.entityid') ?? ''),
            'domain_name' => $data['domainname'] ?? $data['domain-name'] ?? $data['domain_name'] ?? $data['domain'] ?? $data['hostname'] ?? $data['description'] ?? Arr::get($data, 'entity.description') ?? '',
            'customer_id' => (string) ($data['customerid'] ?? $data['customer-id'] ?? $data['customer_id'] ?? Arr::get($data, 'entity.customerid') ?? ''),
            'plan_name' => $data['planname'] ?? $data['plan_name'] ?? $data['productcategory'] ?? $data['productkey'] ?? $data['description'] ?? Arr::get($data, 'entitytype.entitytypename') ?? Arr::get($data, 'entitytype.entitytypekey') ?? '',
            'status' => $data['currentstatus'] ?? $data['orderstatus'] ?? $data['status'] ?? Arr::get($data, 'entity.currentstatus') ?? Arr::get($data, 'orders.orderstatus') ?? 'Unknown',
            'ip_address' => $data['ipaddress'] ?? $data['ip_address'] ?? $data['ip'] ?? Arr::get($data, 'server.ipaddress') ?? Arr::get($data, 'server.ip') ?? null,
            'cpanel_url' => $data['cpanelurl'] ?? $data['cpanel_url'] ?? $data['controlpanelurl'] ?? $data['tempurl'] ?? Arr::get($data, 'server.cpanelurl') ?? Arr::get($data, 'server.controlpanelurl') ?? Arr::get($data, 'server.tempurl') ?? null,
            'cpanel_username' => $data['cpanelusername'] ?? $data['cpanel_username'] ?? $data['username'] ?? Arr::get($data, 'server.cpanelusername') ?? Arr::get($data, 'server.username') ?? null,
            'bandwidth' => $data['bandwidth'] ?? $data['bandwidth_mb'] ?? Arr::get($data, 'plan.bandwidth') ?? null,
            'disk_space' => $data['diskspace'] ?? $data['disk_space_mb'] ?? Arr::get($data, 'plan.diskspace') ?? null,
            'creation_time' => $data['creationtime'] ?? $data['creation_time'] ?? Arr::get($data, 'orders.creationtime') ?? null,
            'end_time' => $data['endtime'] ?? $data['end_time'] ?? $data['expirytime'] ?? Arr::get($data, 'orders.endtime') ?? null,
            'raw' => $data,
        ];
    }

    private function mapRcStatus(string $rcStatus): string
    {
        return match (strtolower($rcStatus)) {
            'active', 'active (paid)' => HostingOrder::STATUS_ACTIVE,
            'suspended' => HostingOrder::STATUS_SUSPENDED,
            'deleted', 'cancelled' => HostingOrder::STATUS_CANCELLED,
            'expired' => HostingOrder::STATUS_EXPIRED,
            'pending', 'inactive' => HostingOrder::STATUS_PENDING,
            default => HostingOrder::STATUS_PENDING,
        };
    }

    private function syncErrorMessage(\Throwable $e, string $fallback): string
    {
        $message = $e->getMessage();

        if (str_contains($message, 'Could not resolve host')) {
            return 'Could not reach the ResellerClub API host. Check server DNS/network access to httpapi.com.';
        }

        return $fallback;
    }

    /**
     * @param  mixed  $data
     */
    private function responseMessage(Response $response, mixed $data, string $fallback): string
    {
        if ($this->looksLikeHtmlError($response)) {
            return 'The upstream provisioning service temporarily blocked or rejected the request. Please try again in a moment.';
        }

        if (is_array($data)) {
            foreach (['message', 'error', 'description', 'msg'] as $key) {
                $value = $this->sanitizeErrorText((string) ($data[$key] ?? ''));
                if ($value !== '') {
                    return $value;
                }
            }
        }

        $rawBody = $this->sanitizeErrorText((string) $response->body());

        return $rawBody !== '' ? $rawBody : $fallback;
    }

    private function sanitizeErrorText(string $value): string
    {
        $value = trim($value);
        if ($value === '') {
            return '';
        }

        if ($this->looksLikeHtmlDocument($value)) {
            return 'ResellerClub temporarily blocked or rejected the request. Please try again in a moment.';
        }

        return trim(preg_replace('/\s+/', ' ', strip_tags($value)) ?? '');
    }

    private function looksLikeHtmlError(Response $response): bool
    {
        $contentType = strtolower((string) $response->header('Content-Type'));
        $body = trim((string) $response->body());

        return str_contains($contentType, 'text/html') || $this->looksLikeHtmlDocument($body);
    }

    private function looksLikeHtmlDocument(string $value): bool
    {
        $normalized = strtolower(ltrim($value));

        return str_starts_with($normalized, '<!doctype html')
            || str_starts_with($normalized, '<html')
            || str_contains($normalized, '<body')
            || str_contains($normalized, '<head')
            || str_contains($normalized, '<title>')
            || str_contains($normalized, 'cloudflare');
    }

    private function hostingTimestamp(mixed $value): ?\Carbon\Carbon
    {
        if ($value === null || $value === '') {
            return null;
        }

        if (is_numeric($value)) {
            return \Carbon\Carbon::createFromTimestamp((int) $value);
        }

        try {
            return \Carbon\Carbon::parse((string) $value);
        } catch (\Throwable) {
            return null;
        }
    }

    private function unsignedLimitOrNull(mixed $value): ?int
    {
        if (! is_numeric($value)) {
            return null;
        }

        $normalized = (int) $value;

        return $normalized >= 0 ? $normalized : null;
    }
}