<?php
declare(strict_types=1);

/**
 * CakePHP(tm) : Rapid Development Framework (https://cakephp.org)
 * Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 *
 * Licensed under The MIT License
 * For full copyright and license information, please see the LICENSE.txt
 * Redistributions of files must retain the above copyright notice.
 *
 * @copyright     Copyright (c) Cake Software Foundation, Inc. (https://cakefoundation.org)
 * @link          https://cakephp.org CakePHP(tm) Project
 * @since         3.0.0
 * @license       https://opensource.org/licenses/mit-license.php MIT License
 */
namespace Cake\View\Helper;

use Cake\Core\App;
use Cake\Core\Exception\CakeException;
use Cake\Routing\Asset;
use Cake\Routing\Router;
use Cake\View\Helper;

/**
 * UrlHelper class for generating URLs.
 */
class UrlHelper extends Helper
{
    /**
     * Default config for this class
     *
     * @var array<string, mixed>
     */
    protected $_defaultConfig = [
        'assetUrlClassName' => Asset::class,
    ];

    /**
     * Asset URL engine class name
     *
     * @var string
     * @psalm-var class-string<\Cake\Routing\Asset>
     */
    protected $_assetUrlClassName;

    /**
     * Check proper configuration
     *
     * @param array<string, mixed> $config The configuration settings provided to this helper.
     * @return void
     */
    public function initialize(array $config): void
    {
        parent::initialize($config);
        $engineClassConfig = $this->getConfig('assetUrlClassName');

        /** @psalm-var class-string<\Cake\Routing\Asset>|null $engineClass */
        $engineClass = App::className($engineClassConfig, 'Routing');
        if ($engineClass === null) {
            throw new CakeException(sprintf('Class for %s could not be found', $engineClassConfig));
        }

        $this->_assetUrlClassName = $engineClass;
    }

    /**
     * Returns a URL based on provided parameters.
     *
     * ### Options:
     *
     * - `escape`: If false, the URL will be returned unescaped, do only use if it is manually
     *    escaped afterwards before being displayed.
     * - `fullBase`: If true, the full base URL will be prepended to the result
     *
     * @param array|string|null $url Either a relative string URL like `/products/view/23` or
     *    an array of URL parameters. Using an array for URLs will allow you to leverage
     *    the reverse routing features of CakePHP.
     * @param array<string, mixed> $options Array of options.
     * @return string Full translated URL with base path.
     */
    public function build($url = null, array $options = []): string
    {
        $defaults = [
            'fullBase' => false,
            'escape' => true,
        ];
        $options += $defaults;

        $url = Router::url($url, $options['fullBase']);
        if ($options['escape']) {
            /** @var string $url */
            $url = h($url);
        }

        return $url;
    }

    /**
     * Returns a URL from a route path string.
     *
     * ### Options:
     *
     * - `escape`: If false, the URL will be returned unescaped, do only use if it is manually
     *    escaped afterwards before being displayed.
     * - `fullBase`: If true, the full base URL will be prepended to the result
     *
     * @param string $path Cake-relative route path.
     * @param array $params An array specifying any additional parameters.
     *   Can be also any special parameters supported by `Router::url()`.
     * @param array<string, mixed> $options Array of options.
     * @return string Full translated URL with base path.
     * @see \Cake\Routing\Router::pathUrl()
     */
    public function buildFromPath(string $path, array $params = [], array $options = []): string
    {
        return $this->build(['_path' => $path] + $params, $options);
    }

    /**
     * Generates URL for given image file.
     *
     * Depending on options passed provides full URL with domain name. Also calls
     * `Helper::assetTimestamp()` to add timestamp to local files.
     *
     * @param string $path Path string.
     * @param array<string, mixed> $options Options array. Possible keys:
     *   `fullBase` Return full URL with domain name
     *   `pathPrefix` Path prefix for relative URLs
     *   `plugin` False value will prevent parsing path as a plugin
     *   `timestamp` Overrides the value of `Asset.timestamp` in Configure.
     *        Set to false to skip timestamp generation.
     *        Set to true to apply timestamps when debug is true. Set to 'force' to always
     *        enable timestamping regardless of debug value.
     * @return string Generated URL
     */
    public function image(string $path, array $options = []): string
    {
        $options += ['theme' => $this->_View->getTheme()];

        return h($this->_assetUrlClassName::imageUrl($path, $options));
    }

    /**
     * Generates URL for given CSS file.
     *
     * Depending on options passed provides full URL with domain name. Also calls
     * `Helper::assetTimestamp()` to add timestamp to local files.
     *
     * @param string $path Path string.
     * @param array<string, mixed> $options Options array. Possible keys:
     *   `fullBase` Return full URL with domain name
     *   `pathPrefix` Path prefix for relative URLs
     *   `ext` Asset extension to append
     *   `plugin` False value will prevent parsing path as a plugin
     *   `timestamp` Overrides the value of `Asset.timestamp` in Configure.
     *        Set to false to skip timestamp generation.
     *        Set to true to apply timestamps when debug is true. Set to 'force' to always
     *        enable timestamping regardless of debug value.
     * @return string Generated URL
     */
    public function css(string $path, array $options = []): string
    {
        $options += ['theme' => $this->_View->getTheme()];

        return h($this->_assetUrlClassName::cssUrl($path, $options));
    }

    /**
     * Generates URL for given javascript file.
     *
     * Depending on options passed provides full URL with domain name. Also calls
     * `Helper::assetTimestamp()` to add timestamp to local files.
     *
     * @param string $path Path string.
     * @param array<string, mixed> $options Options array. Possible keys:
     *   `fullBase` Return full URL with domain name
     *   `pathPrefix` Path prefix for relative URLs
     *   `ext` Asset extension to append
     *   `plugin` False value will prevent parsing path as a plugin
     *   `timestamp` Overrides the value of `Asset.timestamp` in Configure.
     *        Set to false to skip timestamp generation.
     *        Set to true to apply timestamps when debug is true. Set to 'force' to always
     *        enable timestamping regardless of debug value.
     * @return string Generated URL
     */
    public function script(string $path, array $options = []): string
    {
        $options += ['theme' => $this->_View->getTheme()];

        return h($this->_assetUrlClassName::scriptUrl($path, $options));
    }

    /**
     * Generates URL for given asset file.
     *
     * Depending on options passed provides full URL with domain name. Also calls
     * `Helper::assetTimestamp()` to add timestamp to local files.
     *
     * ### Options:
     *
     * - `fullBase` Boolean true or a string (e.g. https://example) to
     *    return full URL with protocol and domain name.
     * - `pathPrefix` Path prefix for relative URLs
     * - `ext` Asset extension to append
     * - `plugin` False value will prevent parsing path as a plugin
     * - `timestamp` Overrides the value of `Asset.timestamp` in Configure.
     *    Set to false to skip timestamp generation.
     *    Set to true to apply timestamps when debug is true. Set to 'force' to always
     *    enable timestamping regardless of debug value.
     *
     * @param string $path Path string or URL array
     * @param array<string, mixed> $options Options array.
     * @return string Generated URL
     */
    public function assetUrl(string $path, array $options = []): string
    {
        $options += ['theme' => $this->_View->getTheme()];

        return h($this->_assetUrlClassName::url($path, $options));
    }

    /**
     * Adds a timestamp to a file based resource based on the value of `Asset.timestamp` in
     * Configure. If Asset.timestamp is true and debug is true, or Asset.timestamp === 'force'
     * a timestamp will be added.
     *
     * @param string $path The file path to timestamp, the path must be inside `App.wwwRoot` in Configure.
     * @param string|bool $timestamp If set will overrule the value of `Asset.timestamp` in Configure.
     * @return string Path with a timestamp added, or not.
     */
    public function assetTimestamp(string $path, $timestamp = null): string
    {
        return h($this->_assetUrlClassName::assetTimestamp($path, $timestamp));
    }

    /**
     * Checks if a file exists when theme is used, if no file is found default location is returned
     *
     * @param string $file The file to create a webroot path to.
     * @return string Web accessible path to file.
     */
    public function webroot(string $file): string
    {
        $options = ['theme' => $this->_View->getTheme()];

        return h($this->_assetUrlClassName::webroot($file, $options));
    }

    /**
     * Event listeners.
     *
     * @return array<string, mixed>
     */
    public function implementedEvents(): array
    {
        return [];
    }
}
