<?php
/**
 * This source file is part of the open source project
 * ExpressionEngine (https://expressionengine.com)
 *
 * @link      https://expressionengine.com/
 * @copyright Copyright (c) 2003-2022, Packet Tide, LLC (https://www.packettide.com)
 * @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
 */

namespace ExpressionEngine\Service\Config;

/**
 * Config File
 */
class File extends ConfigWithDefaults
{
    protected $config = array();

    /**
     * Create a new Config\File object
     *
     * @param string $path Full path to the config file
     */
    public function __construct($path)
    {
        // Load in config
        require($path);

        if (isset($config)) {
            $this->config = $config;
        }

        $this->defaults = default_config_items();
    }

    /**
     * Get an item from the config, you can use
     * "item.subitem.subsubitem" to drill down in the config
     *
     * @param  string $path      The config item to get
     * @param  mixed  $default   The value to return if $path can not be found
     * @param  mixed  $raw_value Whether or not to return the raw value with unparsed variables
     * @return mixed             The value found for $path, otherwise $default
     */
    public function get($path, $default = null, $raw_value = false)
    {
        $config = $this->getArrayValue($this->config, $path);

        if (! $raw_value) {
            $config = parse_config_variables($config);
        }

        return ($config !== null) ? $config : $default;
    }

    /**
     * Check if the file has a given item
     *
     * @return bool TRUE if it has the item, FALSE if not
     */
    public function has($path)
    {
        $config = $this->getArrayValue($this->config, $path);

        return ! is_null($config);
    }

    /**
     * Get a config item as a boolean
     *
     * This is aware of some of EE's conventions, so it will
     * cast strings y and n to the correct boolean.
     *
     * @param string $path    The config item to get
     * @param bool   $default The default value
     * @return bool  The value cast to bool
     */
    public function getBoolean($path, $default = false)
    {
        $value = $this->get($path, $default);

        if (is_bool($value)) {
            return $value;
        }

        switch (strtolower($value)) {
            case 'yes':
            case 'y':
            case 'on':
                return true;

            break;

            case 'no':
            case 'n':
            case 'off':
                return false;

            break;

            default:
                return null;

            break;
        }
    }

    /**
     * Set an item in the config. You can use 'item.subitem.subsubitem' to drill
     * down in the config.
     *
     * @param  string $path    The config item to set
     * @param  mixed  $value   The value to set
     * @return void
     */
    public function set($path, $value, $write_to_file = false)
    {
        $this->config = $this->setArrayValue($path, $value, $this->config);

        if ($write_to_file) {
            ee()->config->_update_config(
                $this->setArrayValue($path, $value)
            );
        }
    }

    /**
     * Get a nested array value given a dot-separated path
     *
     * @param  array  $array Array to traverse
     * @param  string $path  Dot-separated path
     * @return mixed         Array value
     */
    private function getArrayValue($array, $path)
    {
        $path = explode('.', $path);

        for ($i = $array; $key = array_shift($path); $i = $i[$key]) {
            if (! isset($i[$key])) {
                return null;
            }
        }

        return $i;
    }

    /**
     * Set a nested array value given a dot-separated path
     *
     * @param  string $path   Dot-separated path
     * @param  mixed  $value  Value to set, pass in NULL to unset
     * @param  array  $array  Array to traverse and set value in
     * @return array  Resulting array
     */
    private function setArrayValue($path, $value, $array = [])
    {
        $path = explode('.', $path);

        for ($i = &$array; $key = array_shift($path); $i = &$i[$key]) {
            if (! isset($i[$key])) {
                $i[$key] = array();
            }

            // Maintain a list of the last array and key for unsetting
            $last_array = &$i;
            $last_key = $key;
        }

        // Unset it if value is NULL
        if ($value === null) {
            unset($last_array[$last_key]);
        } else {
            $i = $value;
        }

        return $array;
    }
}

// EOF
