/**
 * Cloud9 Language Foundation
 *
 * @copyright 2013, Ajax.org B.V.
 */
define(function(require, exports, module) {

var completeUtil = require("plugins/c9.ide.language/complete_util");
var baseLanguageHandler = require('plugins/c9.ide.language/base_handler');
var htmlSnippets = require("./snippets");

var completer = module.exports = Object.create(baseLanguageHandler);

completer.handlesLanguage = function(language) {
    return language === "html";
};

var JADE_REGEX = /.*?([a-zA-Z]*)([.#])([\w]+)/;
var JADE_ID_REGEX = /[a-zA-Z_0-9\$\_.#]/;

completer.getCompletionRegex = function() {
    return /[<=A-Za-z:_$\-]/;
};

completer.getIdentifierRegex = function() {
    return JADE_ID_REGEX;
};

completer.complete = function(doc, fullAst, pos, options, callback) {
    var line = doc.getLine(pos.row);
    var match = JADE_REGEX.exec(line.substring(0, pos.column));
    if (match) {
        var replaceText;
        var snippet = htmlSnippets[match[1]];
        if (snippet) {
            replaceText = snippet.replace("<" + match[1] + ">",
                ["<", match[1], match[2] === "." ? " class=\"" : " id=\"",
                    match[3], "\">"].join(""));
        }
        else {
            replaceText = ["<", match[1] || "div",
                match[2] === "." ? " class=\"" : " id=\"", match[3],
                "\">^^", "</", match[1] || "div", ">"].join("");
        }
        callback([{
              name: match[1] + match[2] + match[3],
              replaceText: replaceText,
              doc: "<pre>" + replaceText.replace("\^\^", "&#9251;").replace(/</g, "&lt;") + "</pre>",
              icon: null,
              meta: "Jade-Haml",
              identifierRegex: JADE_ID_REGEX,
              priority: 100
        }]);
    }
    else {
        var identifier = completeUtil.retrievePrecedingIdentifier(line, pos.column);
        var allIdentifiers = Object.keys(htmlSnippets);
        var matches = completeUtil.findCompletions(identifier, allIdentifiers);
        callback(matches.map(function(m) {
            return {
              name: m,
              replaceText: htmlSnippets[m],
              doc: "<pre>" + htmlSnippets[m].replace("\^\^", "&#9251;").replace(/</g, "&lt;") + "</pre>",
              icon: null,
              meta: "snippet",
              priority: 2
            };
        }));
    }
};


});