var inputpanel = {
  title: "untitled",
  toString() {
    return this.title;
  },
  value: "",
  on: false,
  pos: [20, window.size.y - 20],
  wh: [100, 100],
  anchor: [0, 1],
  padding: [5, -15],

  gui() {
    this.win ??= Mum.window({
      width: this.wh.x,
      height: this.wh.y,
      color: Color.black.alpha(0.1),
      anchor: this.anchor,
      padding: this.padding,
    });
    var itms = this.guibody();
    if (!Array.isArray(itms)) itms = [itms];
    if (this.title) this.win.items = [Mum.column({ items: [Mum.text({ str: this.title }), ...itms] })];
    else this.win.items = itms;

    this.win.draw([100, window.size.y - 50]);
  },

  guibody() {
    return [Mum.text({ str: this.value, color: Color.green }), Mum.button({ str: "SUBMIT", action: this.submit.bind(this) })];
  },

  open() {
    this.on = true;
    this.value = "";
    this.start();
    this.keycb();
  },

  start() {},

  close() {
    player[0].uncontrol(this);
    this.on = false;
    if ("on_close" in this) this.on_close();
  },

  action() {},

  closeonsubmit: true,
  submit() {
    if (!this.submit_check()) return;
    this.action();
    if (this.closeonsubmit) this.close();
  },

  submit_check() {
    return true;
  },

  keycb() {},

  caret: 0,

  reset_value() {
    this.value = "";
    this.caret = 0;
  },

  input_backspace_pressrep() {
    this.value = this.value.slice(0, -1);
    this.keycb();
  },
};

inputpanel.inputs = {};
inputpanel.inputs.block = true;

inputpanel.inputs.post = function () {
  this.keycb();
};

inputpanel.inputs.char = function (c) {
  this.value = this.value.slice(0, this.caret) + c + this.value.slice(this.caret);
  this.caret++;
};
inputpanel.inputs["C-d"] = function () {
  this.value = this.value.slice(0, this.caret) + this.value.slice(this.caret + 1);
};
inputpanel.inputs["C-d"].rep = true;
inputpanel.inputs.tab = function () {
  this.value = input.tabcomplete(this.value, this.assets);
  this.caret = this.value.length;
};
inputpanel.inputs.escape = function () {
  this.close();
};
inputpanel.inputs["C-b"] = function () {
  if (this.caret === 0) return;
  this.caret--;
};
inputpanel.inputs["C-b"].rep = true;
inputpanel.inputs["C-u"] = function () {
  this.value = this.value.slice(this.caret);
  this.caret = 0;
};
inputpanel.inputs["C-f"] = function () {
  if (this.caret === this.value.length) return;
  this.caret++;
};
inputpanel.inputs["C-f"].rep = true;
inputpanel.inputs["C-a"] = function () {
  this.caret = 0;
};
inputpanel.inputs["C-e"] = function () {
  this.caret = this.value.length;
};
inputpanel.inputs.backspace = function () {
  if (this.caret === 0) return;
  this.value = this.value.slice(0, this.caret - 1) + this.value.slice(this.caret);
  this.caret--;
};
inputpanel.inputs.backspace.rep = true;
inputpanel.inputs.enter = function () {
  this.submit();
};

inputpanel.inputs["C-k"] = function () {
  this.value = this.value.slice(0, this.caret);
};

inputpanel.inputs.lm = function () {
  gui.controls.check_submit();
};

var notifypanel = Object.copy(inputpanel, {
  title: "notification",
  msg: "Refusing to save. File already exists.",
  action() {
    this.close();
  },

  guibody() {
    return Mum.column({
      items: [Mum.text({ str: this.msg }), Mum.button({ str: "OK", action: this.close.bind(this) })],
    });
  },
});

var gen_notify = function (val, fn) {
  var panel = Object.create(notifypanel);
  panel.msg = val;
  panel.yes = fn;
  panel.inputs = {};
  panel.inputs.y = function () {
    panel.yes();
    panel.close();
  };
  panel.inputs.y.doc = "Confirm yes.";
  panel.inputs.enter = function () {
    panel.close();
  };
  panel.inputs.enter.doc = "Close.";
  return panel;
};

var listpanel = Object.copy(inputpanel, {
  assets: [],
  allassets: [],
  mumlist: {},

  submit_check() {
    if (this.assets.length === 0) return false;

    this.value = this.assets[0];
    return true;
  },

  start() {
    this.assets = this.allassets.slice();
    this.caret = 0;
    this.mumlist = [];
    this.assets.forEach(function (x) {
      this.mumlist[x] = Mum.text({
        str: x,
        action: this.action,
        color: Color.blue,
        hovered: { color: Color.red },
        selectable: true,
      });
    }, this);
  },

  keycb() {
    if (this.value) this.assets = this.allassets.filter(x => x.startsWith(this.value));
    else this.assets = this.allassets.slice();
    for (var m in this.mumlist) this.mumlist[m].hide = true;
    this.assets.forEach(function (x) {
      this.mumlist[x].hide = false;
    }, this);
  },

  guibody() {
    var a = [Mum.text({ str: this.value, color: Color.green, caret: this.caret })];
    var b = a.concat(Object.values(this.mumlist));
    return Mum.column({ items: b, offset: [0, -10] });
  },
});

return { inputpanel, gen_notify, notifypanel, listpanel };