<?php

// src/Utils\Configuration/ConfigurationService.php

namespace RprtCli\Utils\Configuration;

use RprtCli\Utils\Configuration\ConfigurationInterface;
use Symfony\Component\Yaml\Yaml;

/**
 * Read and write configuration.
 *
 * Check:
 *  - $HOME/.rprt.config.yaml
 *  - $HOME/.rprt/rprt.config.yaml
 *  - $HOME/.config/rprt-cli/rprt.config.yaml
 */
class ConfigurationService implements ConfigurationInterface
{

  const PATHS = [
    '/.',
    '/.config/rprt-cli/',
    '/.rprt/',
  ];

  protected $data;

  protected $default = null;

  protected $configFilePath;

  protected $configFileName;

  /**
   * Yaml service.
   *
   * @var \Symfony\Component\Yaml\Yaml::parseFile;
   */
  protected $yamlParseFile;

    /**
     * Construct method.
     */
  function __construct(string $filepath, string $filename) {
    $file = $filepath . $filename;
    $this->configFileName = $filename;
    $this->configFilePath = $this->findConfig($file);
    if ($this->configFilePath) {
      $this->getConfig();
    }
  }

  /**
   * Checks for config file.
   *
   * @return string|bool
   *   Full path to config file or FALSE if it doesn't exist.
   */
  public function findConfig($filename) {
    if (file_exists($filename)) {
      return $filename;
    }
    foreach (self::PATHS as $path) {
      $fullPath = $_SERVER['HOME'] . $path . $this->configFileName;
      if (file_exists($fullPath)) {
        return $fullPath;
      }
    }
    // @TODO This should be some kind of error!
    var_dump('Config File Not Found!');
    return FALSE;
  }

  /**
   * Get and read the configuration from file.
   */
  public function getConfig() {
    if ($this->configFilePath) {
      $config = Yaml::parseFile($this->configFilePath);
      $this->data = $config;
      return TRUE;
    }
    // Maybe write an exception for missing config.
    // Ask for reconfiguration.
    // @TODO This should be some kind of error!
    var_dump('Config File Path not found!');
    return FALSE;
  }

  /**
   * {@inheritdoc}
   */
  public function get($key, $default = null) {
    $this->default = $default;
    $segments = explode('.', $key);
    $data = $this->data;
    foreach ($segments as $segment) {
      if (isset($data[$segment])) {
        $data = $data[$segment];
      } else {
        $data = $this->default;
        break;
      }
    }
    return $data;
  }

  /**
   * {@inheritdoc}
   */
  public function exists($key) {
    return $this->get($key) !== $this->default;
  }
}