<?php
/**
 * The localization class.
 *
 * @since      	3.3
 */
namespace LiteSpeed;

defined('WPINC') || exit();

class Localization extends Base
{
	const LOG_TAG = '🛍️';

	/**
	 * Init optimizer
	 *
	 * @since  3.0
	 * @access protected
	 */
	public function init()
	{
		add_filter('litespeed_buffer_finalize', array($this, 'finalize'), 23); // After page optm
	}

	/**
	 * Localize Resources
	 *
	 * @since  3.3
	 */
	public function serve_static($uri)
	{
		$url = base64_decode($uri);

		if (!$this->conf(self::O_OPTM_LOCALIZE)) {
			// wp_redirect( $url );
			exit('Not supported');
		}

		if (substr($url, -3) !== '.js') {
			// wp_redirect( $url );
			// exit( 'Not supported ' . $uri );
		}

		$match = false;
		$domains = $this->conf(self::O_OPTM_LOCALIZE_DOMAINS);
		foreach ($domains as $v) {
			if (!$v || strpos($v, '#') === 0) {
				continue;
			}

			$type = 'js';
			$domain = $v;
			// Try to parse space splitted value
			if (strpos($v, ' ')) {
				$v = explode(' ', $v);
				if (!empty($v[1])) {
					$type = strtolower($v[0]);
					$domain = $v[1];
				}
			}

			if (strpos($domain, 'https://') !== 0) {
				continue;
			}

			if ($type != 'js') {
				continue;
			}

			// if ( strpos( $url, $domain ) !== 0 ) {
			if ($url != $domain) {
				continue;
			}

			$match = true;
			break;
		}

		if (!$match) {
			// wp_redirect( $url );
			exit('Not supported2');
		}

		header('Content-Type: application/javascript');

		// Generate
		$this->_maybe_mk_cache_folder('localres');

		$file = $this->_realpath($url);

		self::debug('localize [url] ' . $url);
		$response = wp_remote_get($url, array('timeout' => 180, 'stream' => true, 'filename' => $file));

		// Parse response data
		if (is_wp_error($response)) {
			$error_message = $response->get_error_message();
			file_exists($file) && unlink($file);
			self::debug('failed to get: ' . $error_message);
			wp_redirect($url);
			exit();
		}

		$url = $this->_rewrite($url);

		wp_redirect($url);
		exit();
	}

	/**
	 * Get the final URL of local avatar
	 *
	 * @since  4.5
	 */
	private function _rewrite($url)
	{
		return LITESPEED_STATIC_URL . '/localres/' . $this->_filepath($url);
	}

	/**
	 * Generate realpath of the cache file
	 *
	 * @since  4.5
	 * @access private
	 */
	private function _realpath($url)
	{
		return LITESPEED_STATIC_DIR . '/localres/' . $this->_filepath($url);
	}

	/**
	 * Get filepath
	 *
	 * @since  4.5
	 */
	private function _filepath($url)
	{
		$filename = md5($url) . '.js';
		if (is_multisite()) {
			$filename = get_current_blog_id() . '/' . $filename;
		}
		return $filename;
	}

	/**
	 * Localize JS/Fonts
	 *
	 * @since 3.3
	 * @access public
	 */
	public function finalize($content)
	{
		if (is_admin()) {
			return $content;
		}

		if (!$this->conf(self::O_OPTM_LOCALIZE)) {
			return $content;
		}

		$domains = $this->conf(self::O_OPTM_LOCALIZE_DOMAINS);
		if (!$domains) {
			return $content;
		}

		foreach ($domains as $v) {
			if (!$v || strpos($v, '#') === 0) {
				continue;
			}

			$type = 'js';
			$domain = $v;
			// Try to parse space splitted value
			if (strpos($v, ' ')) {
				$v = explode(' ', $v);
				if (!empty($v[1])) {
					$type = strtolower($v[0]);
					$domain = $v[1];
				}
			}

			if (strpos($domain, 'https://') !== 0) {
				continue;
			}

			if ($type != 'js') {
				continue;
			}

			$content = str_replace($domain, LITESPEED_STATIC_URL . '/localres/' . base64_encode($domain), $content);
		}

		return $content;
	}
}