// 74xx238 emulation 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/>.

// eslint-disable-next-line @typescript-eslint/no-unused-vars
function IC74xx238Init() {
  class IC74xx238 extends DILBase {
    private val = 0;
    private enable = false;
    constructor(simulator: Simulator, id: string, param: BaseComponentParam) {
      super(simulator, id, 16, param);
    }

    setup(canvas: SVGElement) {
      super.DILBASEsetup('ic16', canvas, '74xx238');
    }

    update(): boolean {
      if (this.startdelay) {
        --this.startdelay;
        return false;
      }
      if (this.getStateWire('p16') !== WireState.high || this.getStateWire('p8') !== WireState.low) return false; // no power
      // enable = !E1 AND !E2 AND E3
      const enable =
        this.binary(this.getStateWire('p4'), true) === false &&
        this.binary(this.getStateWire('p5'), true) === false &&
        this.binary(this.getStateWire('p6'), true) === true;
      const val =
        this.asint(this.binary(this.getStateWire('p3'), true), 4) +
        this.asint(this.binary(this.getStateWire('p2'), true), 2) +
        this.asint(this.binary(this.getStateWire('p1'), true), 1);
      const mod = this.val !== val || this.enable !== enable;
      this.val = val;
      this.enable = enable;
      this.getPin('p15').setBool(enable && val === 0);
      this.getPin('p14').setBool(enable && val === 1);
      this.getPin('p13').setBool(enable && val === 2);
      this.getPin('p12').setBool(enable && val === 3);
      this.getPin('p11').setBool(enable && val === 4);
      this.getPin('p10').setBool(enable && val === 5);
      this.getPin('p9').setBool(enable && val === 6);
      this.getPin('p7').setBool(enable && val === 7);
      return mod;
    }
  }
  window.IC74xx238 = IC74xx238;
}

// eslint-disable-next-line @typescript-eslint/no-unused-vars
function IC74xx238Depends() {
  return 'dilbase';
}