/**
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at

 * http://www.apache.org/licenses/LICENSE-2.0

 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

import type Coordinate from '../common/Coordinate';
import { type CrosshairDirectionStyle } from '../common/Styles';
import { isString } from '../common/utils/typeChecks';

import View from './View';

export default class CrosshairLineView extends View {
  override drawImp(ctx: CanvasRenderingContext2D): void {
    const widget = this.getWidget();
    const pane = widget.getPane();
    const bounding = widget.getBounding();
    const chartStore = widget.getPane().getChart().getChartStore();
    const crosshair = chartStore.getTooltipStore().getCrosshair();
    const styles = chartStore.getStyles().crosshair;
    if (isString(crosshair.paneId) && styles.show) {
      if (crosshair.paneId === pane.getId()) {
        const y = crosshair.y!;
        this._drawLine(
          ctx,
          [
            { x: 0, y },
            { x: bounding.width, y },
          ],
          styles.horizontal,
        );
      }
      const x = crosshair.realX!;
      this._drawLine(
        ctx,
        [
          { x, y: 0 },
          { x, y: bounding.height },
        ],
        styles.vertical,
      );
    }
  }

  private _drawLine(
    ctx: CanvasRenderingContext2D,
    coordinates: Coordinate[],
    styles: CrosshairDirectionStyle,
  ): void {
    if (styles.show) {
      const lineStyles = styles.line;
      if (lineStyles.show) {
        this.createFigure({
          name: 'line',
          attrs: { coordinates },
          styles: lineStyles,
        })?.draw(ctx);
      }
    }
  }
}