$(function() {
    function ControlViewModel(parameters) {
        var self = this;

        self.loginState = parameters[0];
        self.settings = parameters[1];

        self._createToolEntry = function () {
            return {
                name: ko.observable(),
                key: ko.observable()
            }
        };

        self.isErrorOrClosed = ko.observable(undefined);
        self.isOperational = ko.observable(undefined);
        self.isPrinting = ko.observable(undefined);
        self.isPaused = ko.observable(undefined);
        self.isError = ko.observable(undefined);
        self.isReady = ko.observable(undefined);
        self.isLoading = ko.observable(undefined);

        self.extrusionAmount = ko.observable(undefined);
        self.controls = ko.observableArray([]);

        self.tools = ko.observableArray([]);

        self.feedRate = ko.observable(100);
        self.flowRate = ko.observable(100);

        self.feedbackControlLookup = {};

        self.controlsFromServer = [];
        self.additionalControls = [];

        self.webcamDisableTimeout = undefined;

        self.keycontrolActive = ko.observable(false);
        self.keycontrolHelpActive = ko.observable(false);
        self.keycontrolPossible = ko.computed(function () {
            return self.isOperational() && !self.isPrinting() && self.loginState.isUser() && !$.browser.mobile;
        });
        self.showKeycontrols = ko.computed(function () {
            return self.keycontrolActive() && self.keycontrolPossible();
        });

        self.settings.printerProfiles.currentProfileData.subscribe(function () {
            self._updateExtruderCount();
            self.settings.printerProfiles.currentProfileData().extruder.count.subscribe(self._updateExtruderCount);
        });
        self._updateExtruderCount = function () {
            var tools = [];

            var numExtruders = self.settings.printerProfiles.currentProfileData().extruder.count();
            if (numExtruders > 1) {
                // multiple extruders
                for (var extruder = 0; extruder < numExtruders; extruder++) {
                    tools[extruder] = self._createToolEntry();
                    tools[extruder]["name"](gettext("Tool") + " " + extruder);
                    tools[extruder]["key"]("tool" + extruder);
                }
            } else {
                // only one extruder, no need to add numbers
                tools[0] = self._createToolEntry();
                tools[0]["name"](gettext("Hotend"));
                tools[0]["key"]("tool0");
            }

            self.tools(tools);
        };

        self.fromCurrentData = function (data) {
            self._processStateData(data.state);
        };

        self.fromHistoryData = function (data) {
            self._processStateData(data.state);
        };

        self._processStateData = function (data) {
            self.isErrorOrClosed(data.flags.closedOrError);
            self.isOperational(data.flags.operational);
            self.isPaused(data.flags.paused);
            self.isPrinting(data.flags.printing);
            self.isError(data.flags.error);
            self.isReady(data.flags.ready);
            self.isLoading(data.flags.loading);
        };

        self.fromFeedbackCommandData = function (data) {
            if (data.name in self.feedbackControlLookup) {
                self.feedbackControlLookup[data.name](data.output);
            }
        };

        self.rerenderControls = function () {
            var allControls = self.controlsFromServer.concat(self.additionalControls);
            self.controls(self._processControls(allControls))
        };

        self.requestData = function () {
            $.ajax({
                url: API_BASEURL + "printer/command/custom",
                method: "GET",
                dataType: "json",
                success: function (response) {
                    self._fromResponse(response);
                }
            });
        };

        self._fromResponse = function (response) {
            self.controlsFromServer = response.controls;
            self.rerenderControls();
        };

        self._processControls = function (controls) {
            for (var i = 0; i < controls.length; i++) {
                controls[i] = self._processControl(controls[i]);
            }
            return controls;
        };

        self._processControl = function (control) {
            if (control.type == "parametric_command" || control.type == "parametric_commands") {
                for (var i = 0; i < control.input.length; i++) {
                    control.input[i].value = ko.observable(control.input[i].default);
                    if (!control.input[i].hasOwnProperty("slider")) {
                        control.input[i].slider = false;
                    }
                }
            } else if (control.type == "feedback_command" || control.type == "feedback") {
                control.output = ko.observable("");
                self.feedbackControlLookup[control.name] = control.output;
            } else if (control.type == "section" || control.type == "row" || control.type == "section_row") {
                control.children = self._processControls(control.children);
            }

            var js;
            if (control.hasOwnProperty("javascript")) {
                js = control.javascript;

                // if js is a function everything's fine already, but if it's a string we need to eval that first
                if (!_.isFunction(js)) {
                    control.javascript = function (data) {
                        eval(js);
                    };
                }
            }

            if (control.hasOwnProperty("enabled")) {
                js = control.enabled;

                // if js is a function everything's fine already, but if it's a string we need to eval that first
                if (!_.isFunction(js)) {
                    control.enabled = function (data) {
                        return eval(js);
                    }
                }
            }

            return control;
        };

        self.isCustomEnabled = function (data) {
            if (data.hasOwnProperty("enabled")) {
                return data.enabled(data);
            } else {
                return self.isOperational() && self.loginState.isUser();
            }
        };

        self.clickCustom = function (data) {
            if (data.hasOwnProperty("javascript")) {
                data.javascript(data);
            } else {
                self.sendCustomCommand(data);
            }
        };

        self.sendJogCommand = function (axis, multiplier, distance) {
            if (typeof distance === "undefined")
                distance = $('#jog_distance button.active').data('distance');
            if (self.settings.printerProfiles.currentProfileData() && self.settings.printerProfiles.currentProfileData()["axes"] && self.settings.printerProfiles.currentProfileData()["axes"][axis] && self.settings.printerProfiles.currentProfileData()["axes"][axis]["inverted"]()) {
                multiplier *= -1;
            }

            var data = {
                "command": "jog"
            };
            data[axis] = distance * multiplier;

            self.sendPrintHeadCommand(data);
        };

        self.sendHomeCommand = function (axis) {
            self.sendPrintHeadCommand({
                "command": "home",
                "axes": axis
            });
        };

        self.sendFeedRateCommand = function () {
            self.sendPrintHeadCommand({
                "command": "feedrate",
                "factor": self.feedRate()
            });
        };

        self.sendExtrudeCommand = function () {
            self._sendECommand(1);
        };

        self.sendRetractCommand = function () {
            self._sendECommand(-1);
        };

        self.sendFlowRateCommand = function () {
            self.sendToolCommand({
                "command": "flowrate",
                "factor": self.flowRate()
            });
        };

        self._sendECommand = function (dir) {
            var length = self.extrusionAmount();
            if (!length) length = self.settings.printer_defaultExtrusionLength();

            self.sendToolCommand({
                command: "extrude",
                amount: length * dir
            });
        };

        self.sendSelectToolCommand = function (data) {
            if (!data || !data.key()) return;

            self.sendToolCommand({
                command: "select",
                tool: data.key()
            });
        };

        self.sendPrintHeadCommand = function (data) {
            $.ajax({
                url: API_BASEURL + "printer/printhead",
                type: "POST",
                dataType: "json",
                contentType: "application/json; charset=UTF-8",
                data: JSON.stringify(data)
            });
        };

        self.sendToolCommand = function (data) {
            $.ajax({
                url: API_BASEURL + "printer/tool",
                type: "POST",
                dataType: "json",
                contentType: "application/json; charset=UTF-8",
                data: JSON.stringify(data)
            });
        };

        self.sendCustomCommand = function (command) {
            if (!command)
                return;

            var callback = function () {
                $.ajax({
                    url: API_BASEURL + "printer/command",
                    type: "POST",
                    dataType: "json",
                    contentType: "application/json; charset=UTF-8",
                    data: JSON.stringify(data)
                })
            };
            var data = undefined;
            if (command.type == "command" || command.type == "parametric_command" || command.type == "feedback_command") {
                // single command
                data = {"command": command.command};
            } else if (command.type == "commands" || command.type == "parametric_commands") {
                // multi command
                data = {"commands": command.commands};
            }

            if (command.type == "parametric_command" || command.type == "parametric_commands") {
                // parametric command(s)
                data["parameters"] = {};
                for (var i = 0; i < command.input.length; i++) {
                    data["parameters"][command.input[i].parameter] = command.input[i].value();
                }
            }

            if (command.confirm) {
                var confirmationDialog = $("#confirmation_dialog");
                var confirmationDialogAck = $(".confirmation_dialog_acknowledge", confirmationDialog);

                $(".confirmation_dialog_message", confirmationDialog).text(command.confirm);
                confirmationDialogAck.unbind("click");
                confirmationDialogAck.bind("click", function (e) {
                    e.preventDefault();
                    $("#confirmation_dialog").modal("hide");
                    callback();
                });
                confirmationDialog.modal("show");
            } else {
                callback();
            }

        };

        self.displayMode = function (customControl) {
            switch (customControl.type) {
                case "section":
                    return "customControls_sectionTemplate";
                case "row":
                    return "customControls_rowTemplate";
                case "section_row":
                    return "customControls_sectionRowTemplate";
                case "command":
                case "commands":
                    return "customControls_commandTemplate";
                case "parametric_command":
                case "parametric_commands":
                    return "customControls_parametricCommandTemplate";
                case "feedback_command":
                    return "customControls_feedbackCommandTemplate";
                case "feedback":
                    return "customControls_feedbackTemplate";
                default:
                    return "customControls_emptyTemplate";
            }
        };

        self.rowCss = function (customControl) {
            var span = "span2";
            var offset = "";
            if (customControl.hasOwnProperty("width")) {
                span = "span" + customControl.width;
            }
            if (customControl.hasOwnProperty("offset")) {
                offset = "offset" + customControl.offset;
            }
            return span + " " + offset;
        };

        self.onStartup = function () {
            self.requestData();
        };

        self.onTabChange = function (current, previous) {
            if (current == "#control") {
                if (self.webcamDisableTimeout != undefined) {
                    clearTimeout(self.webcamDisableTimeout);
                }
                var webcamImage = $("#webcam_image");
                var currentSrc = webcamImage.attr("src");
                if (currentSrc === undefined || currentSrc.trim() == "") {
                    var newSrc = CONFIG_WEBCAM_STREAM;
                    if (CONFIG_WEBCAM_STREAM.lastIndexOf("?") > -1) {
                        newSrc += "&";
                    } else {
                        newSrc += "?";
                    }
                    newSrc += new Date().getTime();

                    webcamImage.attr("src", newSrc);
                }
            } else if (previous == "#control") {
                // only disable webcam stream if tab is out of focus for more than 5s, otherwise we might cause
                // more load by the constant connection creation than by the actual webcam stream
                self.webcamDisableTimeout = setTimeout(function () {
                    $("#webcam_image").attr("src", "");
                }, 5000);
            }
        };

        self.onAllBound = function (allViewModels) {
            var additionalControls = [];
            _.each(allViewModels, function (viewModel) {
                if (viewModel.hasOwnProperty("getAdditionalControls")) {
                    additionalControls = additionalControls.concat(viewModel.getAdditionalControls());
                }
            });
            if (additionalControls.length > 0) {
                self.additionalControls = additionalControls;
                self.rerenderControls();
            }
        };

        self.onFocus = function (data, event) {
            if (!self.settings.feature_keyboardControl()) return;
            self.keycontrolActive(true);
        };

        self.onMouseOver = function (data, event) {
            if (!self.settings.feature_keyboardControl()) return;
            $("#webcam_container").focus();
            self.keycontrolActive(true);
        };

        self.onMouseOut = function (data, event) {
            if (!self.settings.feature_keyboardControl()) return;
            $("#webcam_container").blur();
            self.keycontrolActive(false);
        };

        self.toggleKeycontrolHelp = function () {
            self.keycontrolHelpActive(!self.keycontrolHelpActive());
        };

        self.onKeyDown = function (data, event) {
            if (!self.settings.feature_keyboardControl()) return;

            var button = undefined;
            var visualizeClick = true;

            switch (event.which) {
                case 37: // left arrow key
                    // X-
                    button = $("#control-xdec");
                    break;
                case 38: // up arrow key
                    // Y+
                    button = $("#control-yinc");
                    break;
                case 39: // right arrow key
                    // X+
                    button = $("#control-xinc");
                    break;
                case 40: // down arrow key
                    // Y-
                    button = $("#control-ydec");
                    break;
                case 49: // number 1
                case 97: // numpad 1
                    // Distance 0.1
                    button = $("#control-distance01");
                    visualizeClick = false;
                    break;
                case 50: // number 2
                case 98: // numpad 2
                    // Distance 1
                    button = $("#control-distance1");
                    visualizeClick = false;
                    break;
                case 51: // number 3
                case 99: // numpad 3
                    // Distance 10
                    button = $("#control-distance10");
                    visualizeClick = false;
                    break;
                case 52: // number 4
                case 100: // numpad 4
                    // Distance 100
                    button = $("#control-distance100");
                    visualizeClick = false;
                    break;
                case 33: // page up key
                case 87: // w key
                    // z lift up
                    button = $("#control-zinc");
                    break;
                case 34: // page down key
                case 83: // s key
                    // z lift down
                    button = $("#control-zdec");
                    break;
                case 36: // home key
                    // xy home
                    button = $("#control-xyhome");
                    break;
                case 35: // end key
                    // z home
                    button = $("#control-zhome");
                    break;
                default:
                    event.preventDefault();
                    return false;
            }

            if (button === undefined) {
                return false;
            } else {
                event.preventDefault();
                if (visualizeClick) {
                    button.addClass("active");
                    setTimeout(function () {
                        button.removeClass("active");
                    }, 150);
                }
                button.click();
            }
        };

    }

    OCTOPRINT_VIEWMODELS.push([
        ControlViewModel,
        ["loginStateViewModel", "settingsViewModel"],
        "#control"
    ]);
});
