<?php

class ContentAPI
{
    private CodePressCMS $cms;

    public function __construct(CodePressCMS $cms)
    {
        $this->cms = $cms;
    }

    public function getAllPages(): array
    {
        return $this->cms->getAllPageTitles();
    }

    public function getPage(string $path): ?array
    {
        $contentDir = $this->cms->config['content_dir'];
        $path = preg_replace('/\.(md|php|html)$/', '', $path);
        $filePath = $contentDir . '/' . $path;

        $extensions = ['md', 'php', 'html'];
        $actualPath = null;
        foreach ($extensions as $ext) {
            if (file_exists($filePath . '.' . $ext)) {
                $actualPath = $filePath . '.' . $ext;
                break;
            }
        }

        if (!$actualPath || !file_exists($actualPath)) {
            return null;
        }

        $content = file_get_contents($actualPath);
        $extension = pathinfo($actualPath, PATHINFO_EXTENSION);

        switch ($extension) {
            case 'md':
                $result = $this->cms->parseMarkdown($content, $actualPath);
                break;
            case 'php':
                $result = $this->cms->parsePHP($actualPath);
                $result['content'] = $this->cms->processContent($result['content']);
                break;
            case 'html':
                $result = $this->cms->parseHTML($content, $actualPath);
                break;
            default:
                return null;
        }

        return [
            'title' => $result['title'] ?? '',
            'content' => $result['content'] ?? '',
            'path' => $path,
            'layout' => $result['layout'] ?? 'sidebar-content',
            'metadata' => $result['metadata'] ?? [],
        ];
    }

    public function getMenu(): array
    {
        return $this->cms->getMenu();
    }

    public function getConfig(string $key, $default = null)
    {
        $keys = explode('.', $key);
        $value = $this->cms->config;

        foreach ($keys as $k) {
            if (!isset($value[$k])) {
                return $default;
            }
            $value = $value[$k];
        }

        return $value;
    }

    public function getCurrentLanguage(): string
    {
        return $this->cms->currentLanguage;
    }

    public function buildUrl(string $page = 'index', ?string $lang = null, array $params = []): string
    {
        $lang = $lang ?? $this->getCurrentLanguage();
        $query = 'page=' . urlencode($page) . '&lang=' . urlencode($lang);
        if (!empty($params)) {
            $query .= '&' . http_build_query($params);
        }
        return '?' . $query;
    }

    public function pageExists(string $path): bool
    {
        $contentDir = $this->cms->config['content_dir'];
        $path = preg_replace('/\.(md|php|html)$/', '', $path);
        $basePath = $contentDir . '/' . $path;

        return file_exists($basePath . '.md')
            || file_exists($basePath . '.php')
            || file_exists($basePath . '.html');
    }

    public function getCurrentPageTitle(): string
    {
        $page = $this->cms->getPage();
        return $page['title'] ?? '';
    }

    public function getCurrentPagePath(): string
    {
        return $_GET['page'] ?? $this->cms->config['default_page'];
    }

    public function isHomepage(): bool
    {
        $defaultPage = $this->cms->config['default_page'] ?? 'index';
        $currentPage = $_GET['page'] ?? $defaultPage;
        return $currentPage === $defaultPage;
    }

    public function t(string $key): string
    {
        return $this->cms->t($key);
    }

    public function getSiteTitle(): string
    {
        return $this->cms->config['site_title'] ?? 'CodePress';
    }

    public function getAvailableLanguages(): array
    {
        return $this->cms->getAvailableLanguages();
    }

    public function getSearchResults(): array
    {
        if (isset($_GET['search'])) {
            return $this->cms->searchResults;
        }
        return [];
    }

    public function isSearching(): bool
    {
        return isset($_GET['search']);
    }
}