'use strict';

Ox.SourceViewer = function(options, self) {

    self = self || {};
    var that = Ox.Container({}, self)
        .defaults({
            file: '',
            replace: []
        })
        .options(options)
        .addClass('OxSourceViewer');

    self.replace = Ox.merge(
        [[
            // removes indentation inside <pre> tags
            /<pre>([\s\S]+)<\/pre>/g,
            function(pre, text) {
                var lines = trim(text).split('\n'),
                    indent = Ox.min(lines.map(function(line) {
                        var match = line.match(/^\s+/);
                        return match ? match[0].length : 0;
                    }));
                return '<pre>' + lines.map(function(line) {
                    return line.substr(indent);
                }).join('\n') + '</pre>';
            }
        ]],
        self.options.replace
    );
    Ox.print('RE', self.replace)

    self.$table = $('<table>').appendTo(that.$content);

    Ox.get(self.options.file, function(source) {
        var sections = [{comment: '', code: ''}];
        Ox.tokenize(source).forEach(function(token, i) {
            var text = source.substr(token.offset, token.length),
                type = token.type == 'comment' ? 'comment' : 'code';
            if (type == 'comment') {
                i && sections.push({comment: '', code: ''});
                text = /^\/\*/.test(text)
                    ? Ox.sub(text, 2, -2)
                    : Ox.sub(text, 2);
                self.replace.forEach(function(replace) {
                    text = text.replace(replace[0], replace[1]);
                });
            }
            Ox.last(sections)[type] += text;
        });
        sections.forEach(function(section) {
            var $section = $('<tr>'),
                $comment = $('<td>')
                    .addClass('OxComment')
                    .html(trim(section.comment)),
                $code = $('<td>')
                    .addClass('OxCode')
                    .append(
                        Ox.SyntaxHighlighter({
                            source: trim(section.code)
                        })
                    )
            $section
                .append($comment)
                .append($code)
                .appendTo(self.$table);
        });
    });

    function trim(str) {
        // removes leading or trailing empty line
        return str.replace(/^\s*\n/, '').replace(/\n\s*$/, '');
    }

    return that;

};