/*
 * Copyright (c) 2014-2015, b3log.org
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

var playground = {
    editor: undefined,
    pid: undefined,
    init: function () {
        $("#editorDiv").append("<textarea id='editor'></textarea>");
        var textArea = document.getElementById("editor");
        textArea.value = code;
        playground.editor = CodeMirror.fromTextArea(textArea, {
            lineNumbers: true,
            autofocus: true,
            autoCloseBrackets: true,
            matchBrackets: true,
            highlightSelectionMatches: {showToken: /\w/},
            rulers: [{color: "#ccc", column: 120, lineStyle: "dashed"}],
            styleActiveLine: true,
            theme: "wide",
            tabSize: 4,
            indentUnit: 4,
            foldGutter: true,
            cursorHeight: 1,
        });
        
        playground.editor.on('changes', function (cm) {
            $("#url").html("");
        });

        this._initWS();
    },
    _initWS: function () {
        // Used for session retention, server will release all resources of the session if this channel closed
        var sessionWS = new ReconnectingWebSocket(config.channel + '/session/ws?sid=' + config.wideSessionId);

        sessionWS.onopen = function () {
            console.log('[session onopen] connected');
        };

        sessionWS.onmessage = function (e) {
            console.log('[session onmessage]' + e.data);
        };
        sessionWS.onclose = function (e) {
            console.log('[session onclose] disconnected (' + e.code + ')');
        };
        sessionWS.onerror = function (e) {
            console.log('[session onerror] ' + JSON.parse(e));
        };

        var playgroundWS = new ReconnectingWebSocket(config.channel + '/playground/ws?sid=' + config.wideSessionId);

        playgroundWS.onopen = function () {
            console.log('[playground onopen] connected');
        };

        playgroundWS.onmessage = function (e) {
            console.log('[playground onmessage]' + e.data);

            var data = JSON.parse(e.data);
            
            if ("init-playground" === data.cmd) {
                return;
            }

            playground.pid = data.pid;

            var val = $("#output").val();
            $("#output").val(val + data.output);
        };
        playgroundWS.onclose = function (e) {
            console.log('[playground onclose] disconnected (' + e.code + ')');
        };
        playgroundWS.onerror = function (e) {
            console.log('[playground onerror] ' + JSON.parse(e));
        };
    },
    share: function () {
        if (!playground.editor) {
            return;
        }

        var request = newWideRequest();
        request.pid = playground.pid;

        var code = playground.editor.getValue();

        var request = newWideRequest();
        request.code = code;

        $.ajax({
            type: 'POST',
            url: config.context + '/playground/save',
            data: JSON.stringify(request),
            dataType: "json",
            success: function (data) {
                playground.editor.setValue(data.code);

                if (!data.succ) {
                    return;
                }
                
                var url = window.location.protocol + "//" + window.location.host + '/playground/' + data.fileName;
                var html = '<a href="' + url + '" target="_blank">'
                        + url + "</a>";
                $("#url").html(html);
            }
        });
    },
    stop: function () {
        if (!playground.editor || !playground.pid) {
            return;
        }

        var request = newWideRequest();
        request.pid = playground.pid;

        $.ajax({
            type: 'POST',
            url: config.context + '/playground/stop',
            data: JSON.stringify(request),
            dataType: "json"
        });
    },
    run: function () {
        if (!playground.editor) {
            return;
        }

        var code = playground.editor.getValue();

        // Step 1. save & format code
        var request = newWideRequest();
        request.code = code;

        $("#output").val("");

        $.ajax({
            type: 'POST',
            url: config.context + '/playground/save',
            data: JSON.stringify(request),
            dataType: "json",
            success: function (data) {
                // console.log(data);
                playground.editor.setValue(data.code);

                if (!data.succ) {
                    return;
                }

                // Step 2. compile code
                var request = newWideRequest();
                request.fileName = data.fileName;

                $.ajax({
                    type: 'POST',
                    url: config.context + '/playground/build',
                    data: JSON.stringify(request),
                    dataType: "json",
                    success: function (data) {
                        // console.log(data);

                        $("#output").val(data.output);

                        if (!data.succ) {
                            return;
                        }

                        // Step 3. run the executable binary and handle its output
                        var request = newWideRequest();
                        request.executable = data.executable;

                        $.ajax({
                            type: 'POST',
                            url: config.context + '/playground/run',
                            data: JSON.stringify(request),
                            dataType: "json",
                            success: function (data) {
                                // console.log(data);
                            }
                        });
                    }
                });
            }
        });
    }
};

$(document).ready(function () {
    playground.init();
});