<?php

namespace GitList\Util;

use Silex\Application;

class Repository
{
    protected $app;

    protected $defaultFileTypes = array(
        'php'      => 'php',
        'c'        => 'clike',
        'h'        => 'clike',
        'cpp'      => 'clike',
        'm'        => 'clike',
        'mm'       => 'clike',
        'ino'      => 'clike',
        'cs'       => 'text/x-csharp',
        'java'     => 'text/x-java',
        'clj'      => 'clojure',
        'coffee'   => 'coffeescript',
        'css'      => 'css',
        'diff'     => 'diff',
        'ecl'      => 'ecl',
        'el'       => 'erlang',
        'go'       => 'go',
        'groovy'   => 'groovy',
        'hs'       => 'haskell',
        'lhs'      => 'haskell',
        'jsp'      => 'htmlembedded',
        'asp'      => 'htmlembedded',
        'aspx'     => 'htmlembedded',
        'html'     => 'htmlmixed',
        'tpl'      => 'htmlmixed',
        'js'       => 'javascript',
        'json'     => 'javascript',
        'less'     => 'less',
        'lua'      => 'lua',
        'md'       => 'markdown',
        'markdown' => 'markdown',
        'sql'      => 'mysql',
        'pl'       => 'perl',
        'pm'       => 'perl',
        'pas'      => 'pascal',
        'ini'      => 'properties',
        'cfg'      => 'properties',
        'nt'       => 'ntriples',
        'py'       => 'python',
        'rb'       => 'ruby',
        'rst'      => 'rst',
        'r'        => 'r',
        'sh'       => 'shell',
        'ss'       => 'scheme',
        'scala'    => 'text/x-scala',
        'scm'      => 'scheme',
        'sls'      => 'scheme',
        'sps'      => 'scheme',
        'rs'       => 'rust',
        'st'       => 'smalltalk',
        'tex'      => 'stex',
        'vbs'      => 'vbscript',
        'v'        => 'verilog',
        'xml'      => 'xml',
        'xsd'      => 'xml',
        'xsl'      => 'xml',
        'xul'      => 'xml',
        'xlf'      => 'xml',
        'xliff'    => 'xml',
        'xaml'     => 'xml',
        'wxs'      => 'xml',
        'wxl'      => 'xml',
        'wxi'      => 'xml',
        'wsdl'     => 'xml',
        'svg'      => 'xml',
        'rss'      => 'xml',
        'rdf'      => 'xml',
        'plist'    => 'xml',
        'mxml'     => 'xml',
        'kml'      => 'xml',
        'glade'    => 'xml',
        'xq'       => 'xquery',
        'xqm'      => 'xquery',
        'xquery'   => 'xquery',
        'xqy'      => 'xquery',
        'yml'      => 'yaml',
        'yaml'     => 'yaml',
        'png'      => 'image',
        'jpg'      => 'image',
        'gif'      => 'image',
        'jpeg'     => 'image',
        'bmp'      => 'image',
        'csproj'   => 'xml',
    );

    protected static $binaryTypes = array(
        'exe', 'com', 'so', 'la', 'o', 'dll', 'pyc',
        'jpg', 'jpeg', 'bmp', 'gif', 'png', 'xmp', 'pcx', 'svgz', 'ttf', 'tiff', 'oet',
        'gz', 'tar', 'rar', 'zip', '7z', 'jar', 'class',
        'odt', 'ods', 'pdf', 'doc', 'docx', 'dot', 'xls', 'xlsx',
    );

    public function __construct(Application $app)
    {
        $this->app = $app;
    }

    /**
     * Returns the file type based on filename by treating the extension
     *
     * The file type is used by CodeMirror, a Javascript-based IDE implemented in
     * GitList, to properly highlight the blob syntax (if it's a source-code)
     *
     * @param  string $file File name
     * @return mixed  File type
     */
    public function getFileType($file)
    {
        if (($pos = strrpos($file, '.')) !== false) {
            $fileType = substr($file, $pos + 1);
        } else {
            return 'text';
        }

        if (isset($this->defaultFileTypes[$fileType])) {
            return $this->defaultFileTypes[$fileType];
        }

        if (!empty($this->app['filetypes'])) {
            if (isset($this->app['filetypes'][$fileType])) {
                return $this->app['filetypes'][$fileType];
            }
        }

        return 'text';
    }

    /**
     * Returns whether the file is binary.
     *
     * @param string $file
     *
     * @return boolean
     */
    public function isBinary($file)
    {
        if (($pos = strrpos($file, '.')) !== false) {
            $fileType = substr($file, $pos + 1);
        } else {
            return false;
        }

        if (in_array($fileType, self::$binaryTypes)) {
            return true;
        }

        if (!empty($this->app['binary_filetypes']) && array_key_exists($fileType, $this->app['binary_filetypes'])) {
            return $this->app['binary_filetypes'][$fileType];
        }

        return false;
    }

    public function getReadme($repository, $branch = null)
    {
        $files = $repository->getTree($branch)->output();
        if ($branch === null) {
           $branch = $repository->getHead();
        }

        foreach ($files as $file) {
            if (preg_match('/^readme*/i', $file['name'])) {
                return array(
                    'filename' => $file['name'],
                    'content'  => $repository->getBlob("$branch:\"{$file['name']}\"")->output()
                );
            }
        }

        return array();
    }

    /**
     * Returns an Array where the first value is the tree-ish and the second is the path
     *
     * @param  \GitList\Git\Repository $repository
     * @param  string                  $branch
     * @param  string                  $tree
     * @return array
     */
    public function extractRef($repository, $branch = '', $tree = '')
    {
        $branch = trim($branch, '/');
        $tree = trim($tree, '/');
        $input = $branch . '/' . $tree;

        // If the ref appears to be a SHA, just split the string
        if (preg_match("/^([[:alnum:]]{40})(.+)/", $input, $matches)) {
            $branch = $matches[1];
        } else {
            // Otherwise, attempt to detect the ref using a list of the project's branches and tags
            $validRefs = array_merge((array) $repository->getBranches(), (array) $repository->getTags());
            foreach ($validRefs as $key => $ref) {
                if (!preg_match(sprintf("#^%s/#", preg_quote($ref, '#')), $input)) {
                    unset($validRefs[$key]);
                }
            }

            // No exact ref match, so just try our best
            if (count($validRefs) > 1) {
                preg_match('/([^\/]+)(.*)/', $input, $matches);
                $branch = preg_replace('/^\/|\/$/', '', $matches[1]);
            } else {
                // Extract branch name
                $branch = array_shift($validRefs);
            }
        }

        return array($branch, $tree);
    }
}

