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

/* Copyright (C) 2026 Moko Consulting <hello@mokoconsulting.tech>
 *
 * SPDX-License-Identifier: GPL-3.0-or-later
 *
 * FILE INFORMATION
 * DEFGROUP: MokoPlatform.Validate
 * INGROUP: MokoPlatform
 * REPO: https://git.mokoconsulting.tech/MokoConsulting/moko-platform
 * PATH: /validate/check_wiki_health.php
 * BRIEF: Validate wiki health — checks Home page exists, has moko-platform link, pages are indexed
 */

declare(strict_types=1);

require_once __DIR__ . '/../vendor/autoload.php';

use MokoEnterprise\CliFramework;

/**
 * Wiki Health Checker
 *
 * Validates Gitea wiki structure and content for a repository,
 * checking for required pages, broken links, and formatting issues.
 *
 * @since 04.00.00
 */
class CheckWikiHealth extends CliFramework
{
    protected function configure(): void
    {
        $this->setDescription('Validate wiki health for a repository');
        $this->addArgument('--path', 'Repository path (default: current directory)', '.');
        $this->addArgument('--gitea-url', 'Gitea base URL', 'https://git.mokoconsulting.tech');
        $this->addArgument('--token', 'Gitea API token (or set GITEA_TOKEN env var)', '');
        $this->addArgument('--json', 'Output as JSON', false);
    }

    protected function run(): int
    {
        $repoPath = realpath($this->getArgument('--path', '.')) ?: '.';
        $giteaUrl = $this->getArgument('--gitea-url', 'https://git.mokoconsulting.tech');
        $token = $this->getArgument('--token', getenv('GITEA_TOKEN') ?: '');

        // Detect repo owner/name from git config
        $configFile = $repoPath . '/.git/config';
        $remote = '';
        if (is_file($configFile)) {
            $config = file_get_contents($configFile);
            if (preg_match('/url\s*=\s*(.+)/', $config, $m)) {
                $remote = trim($m[1]);
            }
        }

        if (empty($remote)) {
            $this->log('Cannot determine git remote — skipping wiki check', 'WARNING');
            return 0;
        }

        // Parse owner/repo from remote URL
        if (preg_match('#[:/]([^/]+)/([^/.]+?)(?:\.git)?$#', $remote, $m)) {
            $owner = $m[1];
            $repo = $m[2];
        } else {
            $this->log("Cannot parse owner/repo from remote: {$remote}", 'WARNING');
            return 0;
        }

        $this->log("Checking wiki: {$owner}/{$repo}");
        $issues = 0;

        // Check wiki pages via API
        $apiUrl = "{$giteaUrl}/api/v1/repos/{$owner}/{$repo}/wiki/pages";
        $headers = $token ? ["Authorization: token {$token}"] : [];
        $pages = $this->apiGet($apiUrl, $headers);

        if ($pages === null) {
            $this->log('  No wiki found or API error', 'WARNING');
            $issues++;
            if ($this->getArgument("--json", false)) {
                echo json_encode(['status' => 'no_wiki', 'issues' => $issues]);
            }
            return 0;
        }

        $pageCount = count($pages);
        $this->log("  Found {$pageCount} wiki page(s)");

        // Check Home exists
        $hasHome = false;
        $pageTitles = [];
        foreach ($pages as $page) {
            $title = $page['title'] ?? '';
            $pageTitles[] = $title;
            if (strtolower($title) === 'home') {
                $hasHome = true;
            }
        }

        if (!$hasHome) {
            $this->log('  FAIL: No Home page', 'ERROR');
            $issues++;
        } else {
            $this->log('  OK: Home page exists');
        }

        // Check Home has moko-platform link
        if ($hasHome) {
            $homeUrl = "{$giteaUrl}/api/v1/repos/{$owner}/{$repo}/wiki/page/Home";
            $home = $this->apiGet($homeUrl, $headers);
            if ($home) {
                $content = base64_decode($home['content_base64'] ?? '');
                if (stripos($content, 'moko-platform/wiki') !== false || stripos($content, 'moko-platform') !== false) {
                    $this->log('  OK: Has moko-platform reference');
                } else {
                    $this->log('  WARN: Home page missing moko-platform reference', 'WARNING');
                    $issues++;
                }
            }
        }

        if ($this->getArgument("--json", false)) {
            echo json_encode([
                'repo' => "{$owner}/{$repo}",
                'pages' => $pageCount,
                'has_home' => $hasHome,
                'issues' => $issues,
                'page_titles' => $pageTitles,
            ], JSON_PRETTY_PRINT);
        }

        return $issues > 0 ? 1 : 0;
    }

    private function apiGet(string $url, array $headers = []): ?array
    {
        $ctx = stream_context_create([
            'http' => [
                'method' => 'GET',
                'header' => array_merge(['Accept: application/json'], $headers),
                'timeout' => 10,
                'ignore_errors' => true,
            ],
            'ssl' => ['verify_peer' => false],
        ]);

        $response = @file_get_contents($url, false, $ctx);
        if ($response === false) {
            return null;
        }

        $data = json_decode($response, true);
        return is_array($data) ? $data : null;
    }
}

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