#!/usr/bin/env php
<?php

/* Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
 *
 * This file is part of a Moko Consulting project.
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * FILE INFORMATION
 * DEFGROUP: MokoPlatform.Scripts.Deploy
 * INGROUP: MokoPlatform
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /deploy/health-check.php
 * VERSION: 09.25.00
 * BRIEF: Post-deploy health check — verify a Joomla site is responding correctly
 */

declare(strict_types=1);

require_once __DIR__ . '/../lib/Enterprise/CliFramework.php';

use MokoEnterprise\CliFramework;

class HealthCheckCli extends CliFramework
{
    private string $url = '';
    private int $timeout = 30;
    private array $checks = ['http'];

    private int $passed = 0;
    private int $failed = 0;

    protected function configure(): void
    {
        $this->setDescription('Post-deploy health check — verify a Joomla site is responding correctly');
        $this->addArgument('--url', 'Site URL to check', '');
        $this->addArgument('--timeout', 'Request timeout in seconds', '30');
        $this->addArgument('--checks', 'Comma-separated list of checks: http,admin,api', 'http');
    }

    protected function run(): int
    {
        $this->url = $this->getArgument('--url');
        $this->timeout = (int) $this->getArgument('--timeout');
        $checksRaw = $this->getArgument('--checks');
        $this->checks = array_map('trim', explode(',', $checksRaw));

        if ($this->url === '') {
            $this->log('ERROR', 'Usage: health-check.php --url <site-url> [--timeout <seconds>] [--checks <http,admin,api>]');
            return 1;
        }

        $this->url = rtrim($this->url, '/');

        $this->log('INFO', "Health check for: {$this->url}");
        $this->log('INFO', "Timeout: {$this->timeout}s");
        $this->log('INFO', "Checks: " . implode(', ', $this->checks));
        $this->log('INFO', '');

        foreach ($this->checks as $check) {
            switch ($check) {
                case 'http':
                    $this->checkHttp();
                    break;
                case 'admin':
                    $this->checkAdmin();
                    break;
                case 'api':
                    $this->checkApi();
                    break;
                default:
                    $this->log('WARN', "UNKNOWN CHECK: {$check} — skipping");
                    break;
            }
        }

        $this->log('INFO', '');
        $this->log('INFO', "Results: {$this->passed} passed, {$this->failed} failed");

        return $this->failed > 0 ? 1 : 0;
    }

    private function checkHttp(): void
    {
        $this->log('INFO', '[http] GET ' . $this->url);

        $result = $this->curlGet($this->url);

        if ($result === null) {
            $this->fail('http', 'Request failed — could not connect');
            return;
        }

        if ($result['http_code'] !== 200) {
            $this->fail('http', "Expected HTTP 200, got {$result['http_code']}");
            return;
        }

        if ($this->containsFatalError($result['body'])) {
            $this->fail('http', 'Response body contains PHP fatal error');
            return;
        }

        $this->pass('http', "HTTP 200 OK ({$result['time_ms']}ms)");
    }

    private function checkAdmin(): void
    {
        $adminUrl = $this->url . '/administrator/';
        $this->log('INFO', '[admin] GET ' . $adminUrl);

        $result = $this->curlGet($adminUrl);

        if ($result === null) {
            $this->fail('admin', 'Request failed — could not connect');
            return;
        }

        if ($result['http_code'] !== 200) {
            $this->fail('admin', "Expected HTTP 200, got {$result['http_code']}");
            return;
        }

        $this->pass('admin', "HTTP 200 OK ({$result['time_ms']}ms)");
    }

    private function checkApi(): void
    {
        $apiUrl = $this->url . '/api/index.php/v1';
        $this->log('INFO', '[api] GET ' . $apiUrl);

        $result = $this->curlGet($apiUrl);

        if ($result === null) {
            $this->fail('api', 'Request failed — could not connect');
            return;
        }

        if ($result['http_code'] !== 200 && $result['http_code'] !== 401) {
            $this->fail('api', "Expected HTTP 200 or 401, got {$result['http_code']}");
            return;
        }

        $this->pass('api', "HTTP {$result['http_code']} — API is alive ({$result['time_ms']}ms)");
    }

    private function curlGet(string $url): ?array
    {
        $ch = curl_init();

        curl_setopt_array($ch, [
            CURLOPT_URL            => $url,
            CURLOPT_RETURNTRANSFER => true,
            CURLOPT_FOLLOWLOCATION => true,
            CURLOPT_MAXREDIRS      => 5,
            CURLOPT_TIMEOUT        => $this->timeout,
            CURLOPT_CONNECTTIMEOUT => $this->timeout,
            CURLOPT_SSL_VERIFYPEER => true,
            CURLOPT_USERAGENT      => 'MokoHealthCheck/1.0',
        ]);

        $body = curl_exec($ch);

        if (curl_errno($ch)) {
            $error = curl_error($ch);
            $this->log('ERROR', "  cURL error: {$error}");
            curl_close($ch);
            return null;
        }

        $httpCode = (int) curl_getinfo($ch, CURLINFO_HTTP_CODE);
        $totalTime = curl_getinfo($ch, CURLINFO_TOTAL_TIME);
        curl_close($ch);

        return [
            'http_code' => $httpCode,
            'body'      => is_string($body) ? $body : '',
            'time_ms'   => (int) round($totalTime * 1000),
        ];
    }

    private function containsFatalError(string $body): bool
    {
        $patterns = [
            'Fatal error:',
            'Fatal Error',
            'Parse error:',
            'Uncaught Error:',
            'Uncaught Exception:',
        ];

        foreach ($patterns as $pattern) {
            if (stripos($body, $pattern) !== false) {
                return true;
            }
        }

        return false;
    }

    private function pass(string $check, string $message): void
    {
        $this->passed++;
        $this->log('INFO', "[{$check}] PASS: {$message}");
    }

    private function fail(string $check, string $message): void
    {
        $this->failed++;
        $this->log('ERROR', "[{$check}] FAIL: {$message}");
    }
}

$app = new HealthCheckCli();
exit($app->execute());