<?php
namespace taskman;
use Exception;

$GLOBALS['TASKMAN_ROOT_ENV_NAME'] = 'gamectl.props.php';

task('envs', function()
{
  global $GAME_ROOT;
  $dir = normalize_path($GAME_ROOT."/env/", true);
  
  echo "=== Available envs ===\n";

  $results = scan_files_rec(array($dir), array(".props.php"));
      
  foreach($results as $file)
  {
    $file = str_replace($dir, '', normalize_path($file, true));
    $file = str_replace(".props.php", '', $file);
    $file = ltrim($file, '/');
    echo  $file . "\n";
  }
});

function put_env(&$argv)
{
  global $GAME_ROOT;

  _set_env_vars_from_file();

  $env = '';
  $filtered = array();
  for($i=0;$i<sizeof($argv);++$i)
  {
    $v = $argv[$i];

    if(strpos($v, "--env") === 0)
    {
      list($tmp, $env) = explode("=", $v);
      continue;
    }
    else
      $filtered[] = $v;
  }
  $argv = $filtered;

  //GAME_ENV env. variable has top priority
  if(getenv("GAME_ENV"))
    $env = getenv("GAME_ENV");

  if($env)
    putenv("GAME_ENV=$env");
  //default one
  else
    putenv("GAME_ENV=");
}

function _set_env_vars_from_file()
{
  global $GAME_ROOT;

  if(!file_exists($GAME_ROOT . '/.env'))
    return;

  $var_arrs = array();
  $lines = file($GAME_ROOT . '/.env');
  foreach($lines as $line)
  {
    $line = trim($line);

    $line_is_comment = (substr(trim($line),0 , 1) == '#') ? true: false;
    
    if($line_is_comment || empty(trim($line)))
      continue;

    // Split the line variable and succeeding comment on line if exists
    $line_no_comment = explode("#", $line, 2)[0];
    // Split the variable name and value
    $env_ex = preg_split('/(\s?)\=(\s?)/', $line_no_comment);
    $env_name = trim($env_ex[0]);
    $env_value = isset($env_ex[1]) ? trim($env_ex[1]) : "";
    $var_arrs[$env_name] = $env_value;
  }

  foreach($var_arrs as $k => $v)
    putenv("$k=$v");
}

function set_root_env_name($root_name)
{
  $GLOBALS['TASKMAN_ROOT_ENV_NAME'] = $root_name;
}

function get_root_env_name()
{
  return $GLOBALS['TASKMAN_ROOT_ENV_NAME'];
}

function include_env()
{
  global $GAME_ROOT;

  $env_filename = get_env_file();

  if($env_filename && !file_exists($env_filename))
    throw new Exception("No env file '$env_filename'");

  if($env_filename)
    include($env_filename);
}

function get_env_file()
{
  global $GAME_ROOT;

  $env = '';
  if(getenv("GAME_ENV"))
    $env = getenv("GAME_ENV");

  if($env)
  {
    $env_filename = "$GAME_ROOT/env/$env.props.php";
    return $env_filename;
  }
  
  //checking optional env.file
  $env_filename = "$GAME_ROOT/" . get_root_env_name();

  return file_exists($env_filename) ? $env_filename : null;
}