<?php

class Qs_Pdf_Renderer_TcPdf implements Qs_Pdf_Renderer_RendererInterface
{
    const MODE_INLINE   = 'I';
    const MODE_DOWNLOAD = 'D';
    const MODE_FILE     = 'F';
    const MODE_STRING   = 'S';
    const MODE_BASE64   = 'E';

    /** @var \TCPDF */
    protected $_tcpdf;

    protected $_defaults = [
        'orientation' => 'P',
        'unit'        => 'mm',
        'format'      => 'LETTER',
        'unicode'     => true,
        'encoding'    => 'UTF-8',
        'diskcache'   => false,
        'pdfa'        => false,
    ];

    public function __construct(array $config = null)
    {
        $this->_initTCPDF($config);
        return $this;
    }

    protected function _initTCPDF($config)
    {
        $tcpdfConfig = require_once WWW_PATH . '/_lib/qs-config/pdfRendererTcPdf.php';
        require_once BASE_PATH . '/lib/tcpdf/tcpdf.php';

        if (!is_dir(K_PATH_CACHE) && !mkdir(K_PATH_CACHE, 0777, true)) {
            throw new Exception('Can not create ' . __CLASS__ . ' cache folder "' . K_PATH_CACHE . '"');
        }

        $config = array_merge($tcpdfConfig, $config);
        foreach ($this->_defaults as $name => $value) {
            if (!isset($config[$name])) {
                $config[$name] = $value;
            }
        }

        $this->_tcpdf = new TCPDF(
            $config['orientation'],
            $config['unit'],
            $config['format'],
            $config['unicode'],
            $config['encoding'],
            $config['diskcache'],
            $config['pdfa']
        );

        if (isset($config['imageScaleRatio'])) {
            $this->_tcpdf->setImageScale((float) $config['imageScaleRatio']);
        }
        $this->_tcpdf->addPage();
        return $this;
    }

    public function setHtml($html)
    {
        $html = Qs_Auth::addAuthCredentials($html);
        $this->_tcpdf->writeHTML($html);
        return $this;
    }

    public function save($filename)
    {
        $this->_tcpdf->Output($filename, self::MODE_FILE);
        return $this;
    }

    public function inline($filename)
    {
        $this->_tcpdf->Output($filename, self::MODE_INLINE);
        return $this;
    }

    public function download($filename)
    {
        $this->_tcpdf->Output($filename, self::MODE_DOWNLOAD);
        return $this;
    }

    public function render()
    {
        return $this->_tcpdf->Output(null, self::MODE_STRING);
    }

    /**
     * @return \TCPDF
     */
    public function getRenderer()
    {
        return $this->_tcpdf;
    }

}