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<?php
    /**
     * Cz CLI Console
     * @author Jan Pecha, <janpecha@email.cz>
     */

    namespace Cz\Cli;
    use Cz\Cli\Inputs,
        Cz\Cli\Outputs,
        Cz\Cli\Parameters;

    class ConsoleFactory
    {
        /** @var  bool|NULL */
        protected static $useColoredOutput;

        /** @var  bool|NULL */
        protected static $useReadlineProvider;



        /**
         * @return  Console
         */
        public static function createConsole(IOutputProvider $outputProvider = NULL, IInputProvider $inputProvider = NULL, IParametersParser $parser = NULL)
        {
            $outputProvider = $outputProvider === NULL ? self::createOutputProvider() : $outputProvider;
            $inputProvider = $inputProvider === NULL ? self::createInputProvider() : $inputProvider;
            $parser = $parser === NULL ? self::createParamatersParser() : $parser;

            return new Console($outputProvider, $inputProvider, $parser);
        }



        /**
         * @return  IOutputProvider
         */
        public static function createOutputProvider()
        {
            if(self::$useColoredOutput === NULL)
            {
                self::$useColoredOutput = self::detectColoredOutput();
            }

            if(self::$useColoredOutput)
            {
                return new Outputs\ColoredOutput;
            }

            return new Outputs\TextOutput;
        }



        /**
         * @return  IOutputProvider
         */
        public static function createNullOutputProvider()
        {
            return new Outputs\NullOutput;
        }



        /**
         * @return  IInputProvider
         */
        public static function createInputProvider()
        {
            if(self::$useReadlineProvider === NULL)
            {
                self::$useReadlineProvider = self::detectReadline();
            }

            if(self::$useReadlineProvider)
            {
                return new Inputs\ReadlineInputProvider;
            }

            return new Inputs\DefaultInputProvider;
        }



        /**
         * @return  IParametersParser
         */
        public static function createParamatersParser()
        {
            return new Parameters\DefaultParametersParser;
        }



        /**
         * @return  bool
         */
        public static function detectColoredOutput()
        {
            // Code from Tracy (from Nette Framework)
            // see https://github.com/nette/tracy/blob/master/src/Tracy/Dumper.php#L315-L317
            return (getenv('ConEmuANSI') === 'ON'
                || getenv('ANSICON') !== FALSE
                || (defined('STDOUT') && function_exists('posix_isatty') && posix_isatty(STDOUT)));
        }



        /**
         * @return  bool
         */
        public static function detectReadline()
        {
            if(extension_loaded('readline'))
            {
                return TRUE;
            }

            return function_exists('readline') && function_exists('readline_add_history');
        }
    }