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<?php
/*
 * Copyright 2017 Jack Sleight <http://jacksleight.com/>
 * This source file is subject to the MIT license that is bundled with this package in the file LICENCE. 
 */

namespace Coast;

use DateTime;
use Coast\Dir;

class File extends \Coast\File\Path
{
    protected $_chars = [',', '"', '\\'];

    protected $_handle;

    public static function createTemp()
    {
        $path = str_replace(DIRECTORY_SEPARATOR, '/', tempnam(sys_get_temp_dir(), 'php'));
        if (!$path) {
            throw new \Exception('Could not create tempoary file');
        }
        return new \Coast\File($path);
    }

    public static function createMemory($max = null)
    {
        return new \Coast\File("php://temp" . (isset($max) ? "/maxmemory:{$max}" : null));
    }

    public function chars($delimiter = ',', $enclosure = '"', $escape = '\\')
    {
        $this->_chars = [$delimiter, $enclosure, $escape];
        return $this;
    }

    public function readAll()
    {
        if ($this->isOpen()) {
            throw new \Exception("File '{$this}' is open");
        }
        return file_get_contents($this->_name);
    }

    public function writeAll($string)
    {
        if ($this->isOpen()) {
            throw new \Exception("File '{$this}' is open");
        }
        file_put_contents($this->_name, $string);
        return $this;
    }
    
    public function open($mode = 'r')
    {
        $this->_handle = fopen($this->_name, $mode);
        return $this;
    }
    
    public function handle()
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        return $this->_handle;
    }

    public function close()
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        fclose($this->_handle);
        $this->_handle = null;
        return $this;
    }

    public function read($length = null)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        if (!isset($length)) {
            $this->rewind();
            $size = $this->size();
            $length = $size ? $size : 1;
        }
        return fread($this->_handle, $length);
    }

    public function write($string, $length = null)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        isset($length)
            ? fwrite($this->_handle, $string, $length)
            : fwrite($this->_handle, $string);
        return $this;
    }

    public function get($length = null)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        return isset($length)
            ? fgets($this->_handle, $length)
            : fgets($this->_handle);
    }

    public function put($string, $length = null)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        $this->write($string, $length) . $this->write("\n");
        return $this;
    }

    public function getCsv($length = 0)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        return fgetcsv($this->_handle, $length, $this->_chars[0], $this->_chars[1], $this->_chars[2]);
    }

    public function putCsv($array)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        fputcsv($this->_handle, $array, $this->_chars[0], $this->_chars[1]);
        return $this;
    }

    public function seek($offset, $whence = SEEK_SET)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        fseek($this->_handle, $offset, $whence);
        return $this;
    }

    public function rewind()
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        rewind($this->_handle);
        return $this;
    }

    public function truncate($length = 0)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        ftruncate($this->_handle, $length);
        return $this;
    }

    public function tell()
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        return ftell($this->_handle);
    }

    public function flush()
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        return fflush($this->_handle);
    }

    public function lock($operation = LOCK_EX)
    {
        if (!$this->isOpen()) {
            throw new \Exception("File '{$this}' is not open");
        }
        return flock($this->_handle, $operation);
    }

    public function unlock()
    {
        return $this->lock(LOCK_UN);
    }

    public function output()
    {
        if ($this->isOpen()) {
            $this->rewind();
            fpassthru($this->_handle);
        } else {
            readfile($this->_name);
        }        
        return $this;
    }

    public function isOpen()
    {
        return isset($this->_handle);
    }

    public function moveUpload(\Coast\Dir $dir, $baseName = null)
    {
        $name = "{$dir}/" . (isset($baseName)
            ? $this->_parseBaseName($baseName)
            : $this->baseName());
        move_uploaded_file($this->_name, $name);
        $this->_name = $name;
        return $this;
    }

    public function copy(\Coast\Dir $dir, $baseName = null)
    {
        $name = "{$dir}/" . (isset($baseName)
            ? $this->_parseBaseName($baseName)
            : $this->baseName());
        copy($this->_name, $name);
        return new File($name);
    }

    public function remove()
    {
        unlink($this->_name);
        return $this;
    }

    public function permissions($mode = null)
    {
        if (isset($mode)) {
            chmod($this->_name, $mode);
            return $this;
        }
        return parent::permissions();
    }

    public function touch(DateTime $modify = null, \DateTime $access = null)
    {
        touch($this->_name, $modify->getTimestamp(), $access->getTimestamp());
        return $this;
    }

    public function size()
    {
        if ($this->isOpen()) {
            $stat = fstat($this->_handle);
            return $stat['size'];
        } else {
            return filesize($this->_name);
        }
    }

    public function hash($type)
    {
        return hash_file($type, $this->_name);
    }

    public function dir($create = false)
    {
        return new Dir($this->dirName(), $create);
    }
}