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<?php
    /**
     * Colors list: http://www.if-not-true-then-false.com/2010/php-class-for-coloring-php-command-line-cli-scripts-output-php-output-colorizing-using-bash-shell-colors/
     * 
     * @author      Jan Pecha, <janpecha@email.cz>
     * @license     New BSD License
     * @link        http://janpecha.iunas.cz/
     * @version     2013-01-22-1
     */
    
    namespace Cz;
    
    class Cli
    {
        const COLOR_ERROR = '0;31',
            COLOR_SUCCESS = '0;32',
            COLOR_WARNING = '0;33',
            COLOR_INFO = '0;34';
        
        const C_BLACK = 30,
            C_RED = 31,
            C_GREEN = 32,
            C_YELLOW = 33,
            C_BLUE = 34,
            C_PURPLE = 35,
            C_CYAN = 36,
            C_WHITE = 37;
        
        
        /** @var  bool|NULL */
        protected static $isWindows = NULL;
        
        
        
        /**
         * @param   string
         * @return  void
         */
        public static function log($str)
        {
            echo "$str\n";
        }
        
        
        
        /**
         * @param   string
         * @return  void
         */
        public static function error($str)
        {
            if(self::$isWindows === NULL)
            {
                self::detectOs();
            }
            
            if(!self::$isWindows)
            {
                $str = self::coloredString($str, static::COLOR_ERROR);
            }
            
            fwrite(STDERR, $str);
        }
        
        
        
        /**
         * @param   string
         * @return  void
         */
        public static function success($str)
        {
            if(self::$isWindows === NULL)
            {
                self::detectOs();
            }
            
            if(!self::$isWindows)
            {
                $str = self::coloredString($str, static::COLOR_SUCCESS);
            }
            
            echo $str;
        }
        
        
        
        /**
         * @param   string
         * @return  void
         */
        public static function warn($str)
        {
            if(self::$isWindows === NULL)
            {
                self::detectOs();
            }
            
            if(!self::$isWindows)
            {
                $str = self::coloredString($str, static::COLOR_WARNING);
            }
            
            fwrite(STDERR, $str);   // TODO: zmenit vystupni proud, ??echo
        }
        
        
        
        /**
         * @param   string
         * @return  void
         */
        public static function info($str)
        {
            if(self::$isWindows === NULL)
            {
                self::detectOs();
            }
            
            if(!self::$isWindows)
            {
                $str = self::coloredString($str, static::COLOR_INFO);
            }
            
            echo $str;
        }
        
        
        
        /**
         * @param   string
         * @param   bool
         * @return  void
         */
        public static function format($str, $bold = FALSE, $color = NULL)
        {
            if($color === NULL)
            {
                $color = static::C_WHITE;
            }
            
            echo "\033[", // start
                ((int)(bool)$bold), // style
                ';',
                $color, // color
                'm',
                $str, // message
                "\033[0m"; // reset
        }
        
        
        
        /**
         * @param   array
         * @return  array|FALSE
         */
        public static function parseParams(array $argv)
        {
            $params = array();
            $lastName = NULL;
            
            if(isset($argv[1]))     // count($argv) > 1
            {
                // remove argv[0]
                array_shift($argv);
                
                // parsing
                foreach($argv as $argument)
                {
                    if($argument{0} === '-')
                    {
                        $name = trim($argument, '-');
                        $lastName = $name;
                    
                        if(!isset($params[$name]))
                        {
                            $params[$name] = TRUE;
                        }
                    }
                    elseif($lastName === NULL)
                    {
                        throw new \Exception("Bad argument '$argument'");
                    }
                    else
                    {
                        if($params[$lastName] === TRUE)
                        {
                            $params[$lastName] = $argument;
                        }
                        else    // string || array
                        {
                            if(is_string($params[$lastName]))
                            {
                                $newParams = array(
                                    $params[$lastName],
                                    $argument,
                                );
                            
                                $params[$lastName] = $newParams;
                            }
                            else
                            {
                                $params[$lastName][] = $argument;
                            }
                        
                            $lastName = NULL;
                        }
                    }
                }
                
                return $params;
            }
            
            return FALSE;
        }
        
        
        
        /**
         * @param   string
         * @param   string
         * @return  string
         */
        public static function formatPath($dir, $currentDir)
        {
            if($dir{0} === '/')
            {
                return $dir;
            }
            
            return $currentDir . '/' . $dir;
        }
        
        
        
        /**
         * @return  void
         */
        protected static function detectOs()
        {
            if(strtoupper(substr(PHP_OS, 0, 3)) === 'WIN')
            {
                self::$isWindows = TRUE;
            }
            else
            {
                self::$isWindows = FALSE;
            }
        }
        
        
        
        /**
         * @param   string
         * @param   string
         * @return  string
         */
        protected static function coloredString($str, $color)
        {
            return "\033[" . $color . "m" . $str . "\033[0m\r\n";
            #return "\033[" . $color . "m" . $str . "\033[37m\r\n";
        }
    }