<?php

namespace yiins\web;

use yiins\Yii;

/**
 * Class AssetBundle
 * @package base\web
 *
 */
class AssetBundle extends \CApplicationComponent
{
    /**
     * @var AssetBundle[]
     */
    protected static $registeredBundles = [];
    /**
     * @var string the directory that contains the source asset assets for this asset bundle.
     * A source asset file is a file that is part of your source code repository of your Web application.
     *
     * You must set this property if the directory containing the source asset assets is not Web accessible.
     * By setting this property, [[AssetManager]] will publish the source asset assets
     * to a Web-accessible directory automatically when the asset bundle is registered on a page.
     */
    public $sourcePath;
    /**
     * @var array list of bundle class names that this bundle depends on.
     *
     * For example:
     *
     * ```php
     * public $depends = [
     *    'base\assets\JQueryAssets',
     *    '\base\bootstrap\BootstrapAssets',
     * ];
     * ```
     */
    public $depends = [];
    /**
     * @var array list of JavaScript assets that this bundle contains. Each JavaScript file can be
     * specified in one of the following formats:
     *
     * - an absolute URL representing an external asset. For example,
     *   `http://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js` or
     *   `//ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js`.
     * - a relative path representing a local asset (e.g. `js/main.js`). The actual file path of a local
     *   asset can be determined by prefixing [[basePath]] to the relative path, and the actual URL
     *   of the asset can be determined by prefixing [[baseUrl]] to the relative path.
     * - an array, with the first entry being the URL or relative path as described before, and a list of key => value pairs
     *   that will be used to overwrite [[jsOptions]] settings for this entry.
     *   This functionality is available since version 2.0.7.
     *
     * Note that only a forward slash "/" should be used as directory separator.
     */
    public $js = [];
    /**
     * @var array list of CSS assets that this bundle contains. Each CSS file can be specified
     * in one of the three formats as explained in [[js]].
     *
     * Note that only a forward slash "/" should be used as directory separator.
     */
    public $css = [];
    /**
     * @var \CAssetManager
     */
    protected $assetManager = null;
    /**
     * @var string the base URL for the relative asset assets listed in [[js]] and [[css]].
     */
    protected $baseUrl;
    private $isRegistered = false;

    public function __construct()
    {
        $this->init();
    }

    /**
     * Initializes the bundle.
     * If you override this method, make sure you call the parent implementation in the last.
     */
    public function init()
    {
        if ($this->sourcePath !== null) {
            $sourcePath = trim($this->sourcePath);
            $path = Yii::getPathOfAlias(str_replace(['\\', '/'], '.', trim($sourcePath, '/\\')));
            if (!$path) {
                $path = str_replace(['\\', '/'], DIRECTORY_SEPARATOR, rtrim($sourcePath, '/\\'));
            }
            $this->sourcePath = $path;
        }
        if ($this->baseUrl !== null) {
            $this->baseUrl = rtrim($this->baseUrl, '/');
        }
        parent::init();
    }

    /**
     * Get asset URL
     * @param $asset
     * @return string URL of the asset
     */
    public static function getAsset($asset)
    {
        if (!isset(self::$registeredBundles[static::class])) {
            self::$registeredBundles[static::class] = new static();
            self::$registeredBundles[static::class]->publish();
        }
        return self::$registeredBundles[static::class]->getAssetUrl($asset);
    }

    protected function publish()
    {
        if ($this->sourcePath) {
            $this->baseUrl = $this->getAssetManager()->publish($this->sourcePath);
        }
    }

    public function getAssetManager()
    {
        return Yii::web()->getAssetManager();
    }

    /**
     * @param $asset
     * @return string
     */
    protected function getAssetUrl($asset)
    {
        if (strncmp($asset, 'http', 4) === 0 || strncmp($asset, '//', 2) === 0) {
            return $asset;
        } else {
            return $this->baseUrl . '/' . trim($asset);
        }
    }

    public static function getUrl()
    {
        if (!isset(self::$registeredBundles[static::class])) {
            self::$registeredBundles[static::class] = new static();
            self::$registeredBundles[static::class]->publish();
        }
        return self::$registeredBundles[static::class]->baseUrl;
    }

    public static function register($scriptFilesPosition = false, $defaultRegisterDependencies = true)
    {
        if (isset(self::$registeredBundles[static::class]) && self::$registeredBundles[static::class]->isRegistered) {
            return true;
        }
        $instance = new static;
        return $instance->registerBundle($scriptFilesPosition, $defaultRegisterDependencies);
    }

    public function registerBundle($scriptFilesPosition, $defaultRegisterDependencies = true)
    {
        if ($defaultRegisterDependencies) {
            $this->resolveDependencies($scriptFilesPosition);
        }

        if ($scriptFilesPosition === false) {
            $scriptFilesPosition = Yii::web()->clientScript->defaultScriptFilePosition;
        }

        $this->publish();

        foreach ($this->css as $key => $value) {
            $file = $value;
            $media = '';
            if (is_string($key)) {
                $file = $key;
                $media = $value;
            }
            Yii::web()->clientScript
                ->registerCssFile($this->getAssetUrl($file), $media);
        }

        foreach ($this->js as $key => $value) {
            $file = $value;
            $params = [];
            if (is_array($value)) {
                $file = $value[0];
                unset($value[0]);
                $params = $value;
                $position = $scriptFilesPosition;
                if (isset($params['position'])) {
                    $position = $params['position'];
                }
                $this->registerScriptFile($file, $position, $params);
            } elseif (is_string($key)) {
                $this->registerScriptFile($key, $value, $params);
            } else {
                $this->registerScriptFile($file, $scriptFilesPosition, $params);
            }

        }
        self::$registeredBundles[static::class] = $this;
        self::$registeredBundles[static::class]->isRegistered = true;
        return true;
    }

    protected function resolveDependencies($scriptFilesPosition)
    {
        $defaultScriptFilePosition = $scriptFilesPosition;
        $defaultRegisterDependencies = true;
        foreach ($this->depends as $key => $value) {
            $bundle = $value;
            $registerDependencies = $defaultRegisterDependencies;
            if (is_string($key)) {
                $bundle = $key;
                if (is_array($value)) {
                    $scriptFilesPosition = $value[0];
                    $registerDependencies = $value[1];
                } else {
                    $scriptFilesPosition = $value;
                }
            }
            $bundle::register($scriptFilesPosition, $registerDependencies);
            $scriptFilesPosition = $defaultScriptFilePosition;
        }
    }

    private function registerScriptFile($file, $position, $params)
    {
        if (!Yii::web()->clientScript->isScriptFileRegistered($this->getAssetUrl($file), $position)) {
            Yii::web()->clientScript
                ->registerScriptFile($this->getAssetUrl($file), $position, $params);
        }
    }
}