<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2015 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: yunwuxin <448901948@qq.com>
// +----------------------------------------------------------------------

namespace think\console\output;

class Stream
{

    const VERBOSITY_QUIET        = 0;
    const VERBOSITY_NORMAL       = 1;
    const VERBOSITY_VERBOSE      = 2;
    const VERBOSITY_VERY_VERBOSE = 3;
    const VERBOSITY_DEBUG        = 4;

    const OUTPUT_NORMAL = 0;
    const OUTPUT_RAW    = 1;
    const OUTPUT_PLAIN  = 2;

    private $verbosity = self::VERBOSITY_NORMAL;
    private $formatter;


    private $stream;

    /**
     * 构造方法
     */
    public function __construct($stream, Formatter $formatter = null)
    {
        if (!is_resource($stream) || 'stream' !== get_resource_type($stream)) {
            throw new \InvalidArgumentException('The StreamOutput class needs a stream as its first argument.');
        }

        $this->stream = $stream;

        $decorated = $this->hasColorSupport();

        $this->formatter = $formatter ?: new Formatter();
        $this->formatter->setDecorated($decorated);
    }

    /**
     * {@inheritdoc}
     */
    public function setFormatter(Formatter $formatter)
    {
        $this->formatter = $formatter;
    }

    /**
     * {@inheritdoc}
     */
    public function getFormatter()
    {
        return $this->formatter;
    }

    /**
     * {@inheritdoc}
     */
    public function setDecorated($decorated)
    {
        $this->formatter->setDecorated($decorated);
    }

    /**
     * {@inheritdoc}
     */
    public function isDecorated()
    {
        return $this->formatter->isDecorated();
    }

    /**
     * {@inheritdoc}
     */
    public function setVerbosity($level)
    {
        $this->verbosity = (int)$level;
    }

    /**
     * {@inheritdoc}
     */
    public function getVerbosity()
    {
        return $this->verbosity;
    }

    public function isQuiet()
    {
        return self::VERBOSITY_QUIET === $this->verbosity;
    }

    public function isVerbose()
    {
        return self::VERBOSITY_VERBOSE <= $this->verbosity;
    }

    public function isVeryVerbose()
    {
        return self::VERBOSITY_VERY_VERBOSE <= $this->verbosity;
    }

    public function isDebug()
    {
        return self::VERBOSITY_DEBUG <= $this->verbosity;
    }

    /**
     * {@inheritdoc}
     */
    public function writeln($messages, $type = self::OUTPUT_NORMAL)
    {
        $this->write($messages, true, $type);
    }

    /**
     * {@inheritdoc}
     */
    public function write($messages, $newline = false, $type = self::OUTPUT_NORMAL)
    {
        if (self::VERBOSITY_QUIET === $this->verbosity) {
            return;
        }

        $messages = (array)$messages;

        foreach ($messages as $message) {
            switch ($type) {
                case self::OUTPUT_NORMAL:
                    $message = $this->formatter->format($message);
                    break;
                case self::OUTPUT_RAW:
                    break;
                case self::OUTPUT_PLAIN:
                    $message = strip_tags($this->formatter->format($message));
                    break;
                default:
                    throw new \InvalidArgumentException(sprintf('Unknown output type given (%s)', $type));
            }

            $this->doWrite($message, $newline);
        }
    }

    /**
     * 将消息写入到输出。
     * @param string $message 消息
     * @param bool   $newline 是否另起一行
     */
    protected function doWrite($message, $newline)
    {
        if (false === @fwrite($this->stream, $message . ($newline ? PHP_EOL : ''))) {
            throw new \RuntimeException('Unable to write output.');
        }

        fflush($this->stream);
    }

    /**
     * @return resource
     */
    public function getStream()
    {
        return $this->stream;
    }

    /**
     * 是否支持着色
     * @return bool
     */
    protected function hasColorSupport()
    {
        if (DIRECTORY_SEPARATOR == '\\') {
            return false !== getenv('ANSICON') || 'ON' === getenv('ConEmuANSI');
        }

        return function_exists('posix_isatty') && @posix_isatty($this->stream);
    }
}