/*
 Copyright 2012 KAKAO
 */

(function (window, undefined) {
    var kakao = {};
    window.kakao = window.kakao || kakao;

    var uagent = navigator.userAgent.toLocaleLowerCase();
    if (uagent.search('android') > -1) {
        kakao.os = 'android';
        if (uagent.search('chrome') > -1) {
            kakao.browser = 'android+chrome';
        }
    } else if (uagent.search('iphone') > -1 || uagent.search('ipod') > -1 || uagent.search('ipad') > -1) {
        kakao.os = 'ios';
    }

    var app = {
        talk: {
            base_url: 'kakaolink://sendurl?',
            apiver: '2.0.1',
            store: {
                android: 'market://details?id=com.kakao.talk',
                ios: 'http://itunes.apple.com/app/id362057947'
            },
            package: 'com.kakao.talk'
        },
        story: {
            base_url: 'storylink://posting?',
            apiver: '1.0',
            store: {
                android: 'market://details?id=com.kakao.story',
                ios: 'http://itunes.apple.com/app/id486244601'
            },
            package: 'com.kakao.story'
        }
    };

    kakao.link = function (name) {
        var link_app = app[name];
        if ( ! link_app) return { send: function () {
            throw 'No App exists';
        }};
        return {
            send: function (params) {
                var _app = this.app;
                params['apiver'] = _app.apiver;
                var full_url = _app.base_url + serialized(params);

                var install_block = (function (os) {
                    return function () {
                        window.location = _app.store[os];
                    };
                })(this.os);

                if (this.os === 'ios') {
                    var timer = setTimeout(install_block, 2 * 1000);
                    window.addEventListener('pagehide', clearTimer(timer));
                    window.location = full_url;
                } else if (this.os === 'android') {
                    if (this.browser === 'android+chrome') {
                        window.location = 'intent:' + full_url + '#Intent;package=' + _app.package + ';end;';
                    } else {
                        var iframe = document.createElement('iframe');
                        iframe.style.visibility = 'hidden';
                        iframe.src = full_url;
                        iframe.onload = install_block;
                        document.body.appendChild(iframe);
                    }
                }
            },
            app: link_app,
            os: kakao.os,
            browser: kakao.browser
        };

        function serialized(params) {
            var stripped = [];
            for (var k in params) {
                if (params.hasOwnProperty(k)) {
                    stripped.push(k + '=' + encodeURIComponent(params[k]));
                }
            }
            return stripped.join('&');
        }

        function clearTimer(timer) {
            return function () {
                clearTimeout(timer);
                window.removeEventListener('pagehide', arguments.callee);
            };
        }
    };
}(window));