// LED array component for the LogicSimulator
// 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 LEDArrayParam extends BaseComponentParam {
  color: string;
  count: number;
  direction: number;
  padding?: number;
}
// eslint-disable-next-line @typescript-eslint/no-unused-vars
class LEDArray extends BaseComponent {
  private color: string;
  private count: number;
  private direction: number;
  private padding: number;
  private onColor: string;
  private offColor: string;
  private a: Array<boolean | null> = [];
  private b: Array<boolean | null> = [];
  private elements: SVGElement[] = [];
  constructor(simulator: Simulator, id: string, param: LEDArrayParam) {
    super(simulator, id, param);
    this.color = param.color;
    this.count = param.count;
    this.direction = param.direction;
    this.padding = param.padding ? param.padding : 20;
    switch (this.color) {
      case 'red':
        this.onColor = 'ffb9b9';
        this.offColor = '990000';
        break;
      default:
        this.onColor = 'ffffff';
        this.offColor = '000000';
    }
    let x = this.x;
    let y = this.y;
    for (let i = 0; i < this.count; ++i) {
      this.pins.set('a' + i, new TriState(this, x, y));
      this.pins.set('b' + i, new TriState(this, x, y));
      // move next element in given direction
      switch (this.direction) {
        case 8: // up
          y += this.padding;
          break;
        case 6: // right
          x += this.padding;
          break;
        case 2: // down
          y -= this.padding;
          break;
        case 4: // left
          x -= this.padding;
          break;
      }
      this.a[i] = null;
      this.b[i] = null;
    }
  }

  addGradient(canvas: SVGElement, type: string, color1: string, color2: string) {
    const grad = document.createElementNS('http://www.w3.org/2000/svg', 'radialGradient');
    grad.id = 'radialGradient' + type + this.color;
    let stop = document.createElementNS('http://www.w3.org/2000/svg', 'stop');
    stop.setAttribute('offset', '0.4');
    stop.setAttribute('style', 'stop-color:#' + color1 + ';stop-opacity:1');
    grad.appendChild(stop);

    stop = document.createElementNS('http://www.w3.org/2000/svg', 'stop');
    stop.setAttribute('offset', '1');
    stop.setAttribute('style', 'stop-color:#' + color2 + ';stop-opacity:1');
    grad.appendChild(stop);
    canvas.appendChild(grad);
  }

  setup(parent: SVGElement) {
    super.doSetup('ledarray', parent);
    // color already registered?
    const canvas = parent.ownerSVGElement;
    if (canvas === null || this.element === null) return;
    const c = canvas.getElementById('radialGradientOff' + this.color);
    if (c === null) {
      this.addGradient(canvas, 'Off', this.offColor, this.offColor);
      this.addGradient(canvas, 'On', this.onColor, this.offColor);
    }

    const e = [];
    for (let i = 0; i < this.count; ++i) {
      super.doSetup('ledarray', canvas);
      e[i] = this.element;
      e[i].setAttribute('style', 'fill:url(#radialGradientOff' + this.color + ')');
      // move next element in given direction
      switch (this.direction) {
        case 8: // up
          this.y += this.padding;
          break;
        case 6: // right
          this.x += this.padding;
          break;
        case 2: // down
          this.y -= this.padding;
          break;
        case 4: // left
          this.x -= this.padding;
          break;
      }
    }
    this.elements = e;
  }

  io() {
    for (let i = 0; i < this.count; ++i) {
      this.a[i] = this.tri(this.getPin('a' + i).getAndReset());
      this.b[i] = this.tri(this.getPin('b' + i).getAndReset());
    }
  }

  update(): boolean {
    for (let i = 0; i < this.count; ++i) {
      if (this.a[i] !== this.b[i] && this.a[i] !== null && this.b[i] !== null) {
        this.elements[i].setAttribute('style', 'fill:url(#radialGradientOn' + this.color + ')');
      } else {
        this.elements[i].setAttribute('style', 'fill:url(#radialGradientOff' + this.color + ')');
      }
    }
    return false;
  }
}