const PIXI = 'undefined' !== typeof window ? require('pixi.js') : undefined;

import {Color} from './color';
import {Renderable} from './renderable';

export class Primitives extends Renderable {

  static fillStyle(color) {
    return {color};
  }

  static lineStyle(color, thickness = 1) {
    return {color, thickness};
  }

  constructor() {
    super();
    this.primitives = new PIXI.Graphics();
  }

  clear() {
    this.primitives.clear();
  }

  drawCircle(position, radius, lineStyle, fillStyle) {
    this._wrapStyle('drawCircle', '3rd', lineStyle, fillStyle, () => {
      this.primitives.drawCircle(position[0], position[1], radius);
    });
  }

  drawLine(p1, p2, lineStyle, fillStyle) {
    this._wrapStyle('drawLine', '3rd', lineStyle, fillStyle, () => {
      this.primitives.moveTo(p1[0], p1[1]);
      this.primitives.lineTo(p2[0], p2[1]);
    });
  }

  drawRectangle(rectangle, lineStyle, fillStyle) {
    this._wrapStyle('drawLine', '2nd', lineStyle, fillStyle, () => {
      this.primitives.drawRect(
        rectangle[0],
        rectangle[1],
        rectangle[2],
        rectangle[3]
      );
    });
  }

  get internal() {
    return this.primitives;
  }

  _wrapStyle(method, where, lineStyle, fillStyle, fn) {
    if (!lineStyle) {
      throw new TypeError(
        `Primitives::${method} expects lineStyle as ${where} parameter`
      );
    }
    if (fillStyle) {
      const {color} = fillStyle;
      this.primitives.beginFill(color.toInteger(), color.alpha)
    }
    const {color, thickness} = lineStyle;
    this.primitives.lineStyle(thickness, color.toInteger(), color.alpha)
    fn();
    if (fillStyle) {
      this.primitives.endFill();
    }
  }

}