import {Junction} from "../junction/Junction";
import {RESISTANCE_MIN} from '../circuit/Circuit';

export class Wire {

  current: number = 0;

  constructor(
    readonly start: Junction,
    readonly end: Junction,
    public resistance: number,
    public name: string | null = null,
  ) {
    this.start.wires.push(this);
    this.end.wires.push(this);
    if (this.resistance === 0) {
      this.resistance = RESISTANCE_MIN;
    }
  }

  get absCurrent(): number {
    return Math.abs(this.current);
  }

  toString() {
    if (this.start.part === this.end.part && this.name !== null) {
      return `'${this.start.part}' "${this.name}"`;
    }
    return `${this.name !== null ? this.name + ' ' : ''}${this.start.fullName} ==> ${this.end.fullName}`;
  }

  traverse(junction: Junction) {
    if (junction === this.start) {
      return this.end;
    }
    if (junction === this.end) {
      return this.start;
    }
    throw new Error(`Wire is not connected to given Junction: wire=${this}, junction=${junction}`);
  }

}