// ============================================================
// 🔥 强制所有404显示 404.php（放在最前面）
// ============================================================
$requestUri = $_SERVER['REQUEST_URI'];
$ext = pathinfo($requestUri, PATHINFO_EXTENSION);
$staticExtensions = ['jpg', 'jpeg', 'png', 'gif', 'ico', 'css', 'js', 'svg', 'woff', 'woff2', 'ttf', 'eot', 'webp', 'mp4', 'webm'];

// 如果不是静态文件，且不是存在的PHP文件
if (!in_array(strtolower($ext), $staticExtensions)) {
    $filePath = __DIR__ . $requestUri;
    if (!file_exists($filePath) || is_dir($filePath)) {
        // 但不要拦截正常的PHP文件
        if (strpos($requestUri, '.php') === false) {
            http_response_code(404);
            include __DIR__ . '/404.php';
            exit;
        }
    }
}
// **引入配置和依赖**
include('config.php');
require 'vendor/autoload.php';
use Elastic\Elasticsearch\ClientBuilder;


// **获取请求的主机名和请求路径**
$host = isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : 'localhost';
$requestUri = isset($_SERVER['REQUEST_URI']) ? $_SERVER['REQUEST_URI'] : '/';
$requestPath = parse_url($requestUri, PHP_URL_PATH) ?? '/';

// **连接 Redis**
$redis = new Redis();
try {
    $redis->connect('127.0.0.1', 6379);
} catch (RedisException $e) {
    error_log('Redis 连接失败: ' . $e->getMessage());
    $redis = null;
}

// **定义域名绑定的 TXT 文件**
$domainsFile = __DIR__ . '/domains.txt';

// **获取当前域名（保留子域名）**
$currentDomain = $host;

function resolveTemplateConfig($domain, $domainsFile) {
    // 如果 domains.txt 不存在，直接返回空（让调用方处理）
    if (!file_exists($domainsFile)) {
        return null;
    }
    $lines = file($domainsFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);
    foreach ($lines as $line) {
        $parts = explode('|', $line);
        if (count($parts) === 3 && trim($parts[0]) === $domain) {
            return [
                'template_dir' => 'template/' . trim($parts[1]),
                'site_name' => trim($parts[2])
            ];
        }
    }

    $domainParts = explode('.', $domain);
    if (count($domainParts) > 2) {
        $mainDomain = implode('.', array_slice($domainParts, -2));
    } else {
        $mainDomain = $domain;
    }
    $mainDomain = preg_replace('/^www\./', '', $mainDomain);
    
    foreach ($lines as $line) {
        $parts = explode('|', $line);
        if (count($parts) === 3 && trim($parts[0]) === $mainDomain) {
            return [
                'template_dir' => 'template/' . trim($parts[1]),
                'site_name' => trim($parts[2])
            ];
        }
    }

    return null;
}
$config = resolveTemplateConfig($currentDomain, $domainsFile);
$templateDir = $config['template_dir'];
$siteName = $config['site_name'];

if (empty($requestPath)) {
    $requestPath = '/';
}

$GLOBALS['siteName'] = $siteName;
$GLOBALS['templateDir'] = $templateDir;

// **检查域名是否在 domains.txt 中存在，如果不存在则重定向**
function redirectIfDomainNotFound($domain, $domainsFile) {
    // 读取 domains.txt 文件
    $lines = file($domainsFile, FILE_IGNORE_NEW_LINES | FILE_SKIP_EMPTY_LINES);

    $foundDomains = [];
    foreach ($lines as $line) {
        $parts = explode('|', $line);
        if (count($parts) === 3) {
            // 收集所有存在的域名
            $foundDomains[] = trim($parts[0]);
        }
    }

    // 如果没有找到当前域名，随机选择一个存在的域名进行重定向
    if (!in_array($domain, $foundDomains)) {
        $randomDomain = $foundDomains[array_rand($foundDomains)];
        $redirectUrl = "http://www.{$randomDomain}{$_SERVER['REQUEST_URI']}";
        header("Location: $redirectUrl");
        exit;
    }
}

// **检查当前域名是否存在，如果不存在则重定向**
redirectIfDomainNotFound($mainDomain, $domainsFile);

// ============================================================
// ========== 动态路由前缀函数 ==========
// ============================================================
function buildRoutePrefix($domain, $type = 'detail') {
    $domain = preg_replace('/^www\./', '', $domain);
    
    $parts = explode('.', $domain);
    if (count($parts) > 2) {
        $mainDomain = implode('.', array_slice($parts, -2));
        $mainLabel = explode('.', $mainDomain)[0];
    } else {
        $mainLabel = $parts[0];
    }
    
    $mainLabel = preg_replace('/[^a-z0-9]/', '', $mainLabel);
    $prefix = substr($mainLabel, 0, 4);
    if ($prefix === '') $prefix = 'vod';
    
    switch ($type) {
        case 'detail':   return $prefix . 'de';
        case 'category': return $prefix . 'ry';
        case 'play':     return $prefix . 'pf';
        case 'tag':      return $prefix . 'tag';
        default:         return $prefix;
    }
}

$detailPrefix   = buildRoutePrefix($mainDomain, 'detail');   // smbtde
$categoryPrefix = buildRoutePrefix($mainDomain, 'category'); // smbtry
$playPrefix     = buildRoutePrefix($mainDomain, 'play');     // smbtpf
$tagPrefix      = buildRoutePrefix($mainDomain, 'tag');      // smbttag

// ============================================================
// **使用 switch 进行路由匹配**
// ============================================================
switch (true) {

    // ========== 🔥 标签页 - 放在最前面 ==========
    case preg_match('/^\/tag\/([a-zA-Z0-9]+)\.html$/', $requestPath, $matches):
        $_GET['keyword'] = $matches[1];
        include 'tag.php';
        exit;

    case preg_match('/^\/' . preg_quote($tagPrefix, '/') . '\/([a-zA-Z0-9]+)\.html$/', $requestPath, $matches):
        $_GET['keyword'] = $matches[1];
        include 'tag.php';
        exit;

    // ========== 🔥 动态路由 ==========
    // 详情页
    case preg_match('/^\/' . preg_quote($detailPrefix, '/') . '\/([0-9]+)\.html$/', $requestPath, $matches):
        $_GET['vod_id'] = $matches[1];
        include 'detail.php';
        exit;

    // 播放页
    case preg_match('/^\/' . preg_quote($playPrefix, '/') . '\/([0-9]+)-([0-9]+)-([0-9]+)\.html$/', $requestPath, $matches):
        $_GET['vod_id'] = $matches[1];
        $_GET['player_id'] = $matches[2];
        $_GET['episode_id'] = $matches[3];
        include 'play.php';
        exit;

    case preg_match('/^\/' . preg_quote($playPrefix, '/') . '\/([0-9]+)\.html$/', $requestPath, $matches):
        $_GET['vod_id'] = $matches[1];
        include 'play.php';
        exit;

    // 分类页
    case preg_match('/^\/' . preg_quote($categoryPrefix, '/') . '\/([0-9]+)\.html$/', $requestPath, $matches):
        $_GET['type_id'] = $matches[1];
        $_GET['page'] = 1;
        include 'category.php';
        exit;

    case preg_match('/^\/' . preg_quote($categoryPrefix, '/') . '\/([0-9]+)\/([0-9]+)\.html$/', $requestPath, $matches):
        $_GET['type_id'] = $matches[1];
        $_GET['page'] = intval($matches[2]);
        include 'category.php';
        exit;

    // ========== 🔥 子域名降级 ==========
    case preg_match('/^([^.]+)\.(.+)$/', $host, $subdomainMatches) && $subdomainMatches[1] !== 'www':
        $hostParts = explode('.', $host);
        $hostCount = count($hostParts);
        $leftmost = $hostParts[0];
        
        // 白名单：二级子域名走首页
        $whitelist = ['app', 'm', 'mp', 'web', 'h5', 'wap', 'mip'];
        
        // 只有二级子域名（hostCount === 3）且在白名单中才走首页
        if ($hostCount === 3 && in_array($leftmost, $whitelist)) {
            include __DIR__ . '/home.php';
            exit;
        }
        
        // 其他所有子域名（包括三级子域名）走 fjx.php
        $_GET['keyword'] = $leftmost;
        include __DIR__ . '/fjx.php';
        exit;

    // ========== 首页 ==========
    case ($requestPath === '/' || $requestPath === ''):
        include __DIR__ . '/home.php';
        exit;

    // ========== 搜索页 ==========
    case preg_match('/^\/search\/([^\/]+)\/([0-9]+).html$/', $requestPath, $matches):
        $_GET['keyword'] = urldecode($matches[1]);
        $_GET['page'] = intval($matches[2]);
        include 'search.php';
        exit;

    case preg_match('/^\/search\/(.+).html$/', $requestPath, $matches):
        $_GET['keyword'] = urldecode($matches[1]);
        $_GET['page'] = 1;
        include 'search.php';
        exit;

    // ========== 404 ==========
default:
    http_response_code(404);
    include __DIR__ . '/template/404.php';
    exit;
}