// Clock generator component for the LogicSimulator used on the 8-bit-computer
// Copyright (C) 2022 Sascha Nitsch

// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.

// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.

// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

interface DynamicClockParam extends BaseComponentParam {
  speed?: string;
}
// eslint-disable-next-line @typescript-eslint/no-unused-vars
class DynamicClock extends BaseComponent {
  private q = false;
  private clockState = false;
  private speed: number;
  private input = '';
  private speedInput: HTMLInputElement | null = null;
  // eslint-disable-next-line @typescript-eslint/no-explicit-any
  private timer: any;
  constructor(simulator: Simulator, id: string, param: DynamicClockParam) {
    super(simulator, id, param);
    this.pins.set('q', new TriState(this, 30, 0));
    if (param.speed) {
      this.speed = 0;
      this.input = param.speed;
    } else {
      this.speed = 1;
    }
  }

  tick() {
    this.clockState = !this.clockState;
    this.simulator.tick();
  }

  setup(canvas: SVGElement) {
    super.doSetup('dynamicclock', canvas);
    if (this.speed === 0) {
      this.speedInput = <HTMLInputElement>document.getElementById(this.input);
      if (this.speedInput) {
        this.speedInput.addEventListener('change', this.changeSpeed.bind(this));
        this.speed = parseFloat(this.speedInput.value);
        this.timer = setInterval(this.tick.bind(this), 500 / this.speed);
      }
    } else {
      this.timer = setInterval(this.tick.bind(this), 500 / this.speed);
    }
  }

  update(): boolean {
    const oldstate = this.q;
    this.q = this.clockState;
    this.getPin('q').setBool(this.q);
    return oldstate !== this.q;
  }

  changeSpeed() {
    if (!this.speedInput) return;
    this.speed = parseFloat(this.speedInput.value);
    clearInterval(this.timer);
    this.timer = setInterval(this.tick.bind(this), 500 / this.speed);
  }

  close() {
    clearInterval(this.timer);
  }
}