/* HTML 

<div class="keybind" , id="div">
  <label id="label" class="keybindLabel">Example</label>
  <input readonly type="text" id="txt" class="keybindData">
  <button id="clear" class="clearButton">
    Clear
  </button>
</div>

*/
/* CSS 

div.keybind {
  display: grid;
  grid-template-columns: max-content max-content max-content;
  grid-gap: 5px;
}

div.keybind button {
  width: auto;
}

div.keybind label {
  text-align: right;
}

div.keybind label:after {
  content: ":";
}

*/
const { promptError } = require("./prompt")

class KeybindGetter {
    value = null;
    modifiers = null;
    key = "";
    label = null;
    txt = null;
    clearButton = null;
    
    constructor(options, parentElement) {
        if (!options.label || !options.value) {
            promptError("keybind option must contain label and value");
            return;
        }

        this.value = options.value
        this.modifiers = new Set();
        this.key = "";

        this.label = document.createElement("label");
        this.label.classList.add("keybindLabel");

        this.txt = document.createElement("input");
        this.txt.setAttribute('readonly', true);
        this.txt.classList.add("keybindData");

        this.clearButton = document.createElement("button");
        this.clearButton.classList.add("clearButton");
        this.clearButton.textContent = "Clear";
        this.clearButton.onclick = (e) => e.preventDefault();

        parentElement.append(this.label, this.txt, this.clearButton);

        this.setup(options);
        if (options.default) {
            this.setDefault(options.default)
        }
    }

    focus() {
        this.txt.focus();
    }

    output() {
        const output = {value: this.value, accelerator: this.txt.value.replaceAll(" ", "")}
        return JSON.stringify(output);
    }

    updateText() {
        let result = "";
        for (let modifier of this.modifiers) {
            result += modifier + " + ";
        }
        this.txt.value = result + this.key;
    }

    setDefault(defaultValue) {
        const accelerator = parseAccelerator(defaultValue).split("+");
        for (let key of accelerator) {
            if (isModifier(key))
                this.modifiers.add(key);
            else
                this.key = key;
        }
        this.updateText();
    }
    clear() {
        this.modifiers.clear();
        this.key = "";
        this.txt.value = "";
    }

    setup(options) {
        this.txt.addEventListener("keydown", (event) => {
            event.preventDefault();
            if (event.repeat) {
                return
            }
            let key = event.code || event.key;
            if (key in virtualKeyCodes)
                key = virtualKeyCodes[event.code];
            else {
                console.log('Error, key "' + event.code + '" was not found');
                return;
            }

            if (isModifier(key)) {
                if (this.modifiers.size < 3)
                    this.modifiers.add(key);
            } else { // is key
                this.key = key;
            }
            this.updateText();
        });

        this.clearButton.addEventListener("click", () => {
            this.clear()
        });
        this.label.textContent = options.label + " ";
    }
}

class keybindContainer {
    elements = [];

    constructor(options, parentElement) {
        parentElement.classList.add("keybind");
        this.elements = options.map(option => new KeybindGetter(option, parentElement));
        document.querySelector("#buttons").style["padding-top"] = "20px";
    }

    focus() {
        if (this.elements.length > 0)
            this.elements[0].focus();
    }

    submit() {
        return this.elements.map(element => element.output());
    }
}

function parseAccelerator(a) {
    let accelerator = a.toString();

    if (process.platform !== 'darwin') {
        accelerator = accelerator.replace(/(Cmd)|(Command)/gi, '');
    } else {
        accelerator = accelerator.replace(/(Ctrl)|(Control)/gi, '');
    }

    accelerator = accelerator.replace(/(Or)/gi, '');

    return accelerator;
}

function isModifier(key) {
    for (let modifier of ["Shift", "Control", "Ctrl", "Command", "Cmd", "Alt", "AltGr", "Super"]) {
        if (key === modifier)
            return true;
    }
    return false;
}

const virtualKeyCodes = {
    ShiftLeft: "Shift",
    ShiftRight: "Shift",
    ControlLeft: "Ctrl",
    ControlRight: "Ctrl",
    AltLeft: "Alt",
    AltRight: "Alt",
    MetaLeft: "Super",
    MetaRight: "Super",
    NumLock: "NumLock",
    NumpadDivide: "NumDiv",
    NumpadMultiply: "NumMult",
    NumpadSubtract: "NumSub",
    NumpadAdd: "NumAdd",
    NumpadDecimal: "NumDec ",
    Numpad0: "Num0",
    Numpad1: "Num1",
    Numpad2: "Num2",
    Numpad3: "Num3",
    Numpad4: "Num4",
    Numpad5: "Num5",
    Numpad6: "Num6",
    Numpad7: "Num7",
    Numpad8: "Num8",
    Numpad9: "Num9",
    Digit0: "0",
    Digit1: "1",
    Digit2: "2",
    Digit3: "3",
    Digit4: "4",
    Digit5: "5",
    Digit6: "6",
    Digit7: "7",
    Digit8: "8",
    Digit9: "9",
    Minus: "-",
    Equal: "=",
    KeyQ: "Q",
    KeyW: "W",
    KeyE: "E",
    KeyR: "R",
    KeyT: "T",
    KeyY: "Y",
    KeyU: "U",
    KeyI: "I",
    KeyO: "O",
    KeyP: "P",
    KeyA: "A",
    KeyS: "S",
    KeyD: "D",
    KeyF: "F",
    KeyG: "G",
    KeyH: "H",
    KeyJ: "J",
    KeyK: "K",
    KeyL: "L",
    KeyZ: "Z",
    KeyX: "X",
    KeyC: "C",
    KeyV: "V",
    KeyB: "B",
    KeyN: "N",
    KeyM: "M",
    BracketLeft: "[",
    BracketRight: "]",
    Semicolon: ";",
    Quote: "'",
    Backquote: '"',
    Backslash: "\\",
    Comma: ",",
    Period: "'.'",
    Slash: "/",
    plus: '+',
    Space: "Space",
    Tab: "Tab",
    Backspace: "Backspace",
    Delete: "Delete",
    Insert: "Insert",
    Return: "Return",
    Enter: "Enter",
    ArrowUp: "Up",
    ArrowDown: "Down",
    ArrowLeft: "Left",
    ArrowRight: "Right",
    Home: "Home",
    End: "End",
    PageUp: "PageUp",
    PageDown: "PageDown",
    Escape: "Escape",
    AudioVolumeUp: "VolumeUp",
    AudioVolumeDown: "VolumeDown",
    AudioVolumeMute: "VolumeMute",
    MediaTrackNext: "MediaNextTrack",
    MediaTrackPrevious: "MediaPreviousTrack",
    MediaStop: "MediaStop",
    MediaPlayPause: "MediaPlayPause",
    ScrollLock: "ScrollLock",
    PrintScreen: "PrintScreen",
    F1: "F1",
    F2: "F2",
    F3: "F3",
    F4: "F4",
    F5: "F5",
    F6: "F6",
    F7: "F7",
    F8: "F8",
    F9: "F9",
    F10: "F10",
    F11: "F11",
    F12: "F12",
    F13: "F13",
    F14: "F14",
    F15: "F15",
    F16: "F16",
    F17: "F17",
    F18: "F18",
    F19: "F19",
    F20: "F20",
    F21: "F21",
    F22: "F22",
    F23: "F23",
    F24: "F24",
};



module.exports = function promptCreateKeybind(options, parentElement) {
    return new keybindContainer(options, parentElement);
}