import mediaQuery from '@ohos.mediaquery';
import { CommonConstants as Const } from '../constants/CommonConstants';

export default class BreakpointSystem {
  private currentBreakpoint: string = Const.MD;
  private xsListener: mediaQuery.MediaQueryListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_1);
  private smListener: mediaQuery.MediaQueryListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_2);
  private mdListener: mediaQuery.MediaQueryListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_3);
  private lgListener: mediaQuery.MediaQueryListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_4);
  private isBreakpointXS = (mediaQueryResult: mediaQuery.MediaQueryResult) => {
    if (mediaQueryResult.matches) {
      this.updateCurrentBreakpoint(Const.XS);
    }
  }
  private isBreakpointSM = (mediaQueryResult: mediaQuery.MediaQueryResult) => {
    if (mediaQueryResult.matches) {
      this.updateCurrentBreakpoint(Const.SM);
    }
  }
  private isBreakpointMD = (mediaQueryResult: mediaQuery.MediaQueryResult) => {
    if (mediaQueryResult.matches) {
      this.updateCurrentBreakpoint(Const.MD);
    }
  }
  private isBreakpointLG = (mediaQueryResult: mediaQuery.MediaQueryResult) => {
    if (mediaQueryResult.matches) {
      this.updateCurrentBreakpoint(Const.LG);
    }
  }

  public register() {
    this.xsListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_1);
    this.xsListener.on('change', this.isBreakpointXS);

    this.smListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_2);
    this.smListener.on('change', this.isBreakpointSM);

    this.mdListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_3);
    this.mdListener.on('change', this.isBreakpointMD);

    this.lgListener = mediaQuery.matchMediaSync(Const.BREAKPOINTS_SCOPE_4);
    this.lgListener.on('change', this.isBreakpointLG);
  }

  private updateCurrentBreakpoint(breakpoint: string) {
    if (this.currentBreakpoint !== breakpoint) {
      this.currentBreakpoint = breakpoint;
      AppStorage.set<string>('currentBreakpoint', this.currentBreakpoint);
    }
  }

  public unregister() {
    this.xsListener.off('change', this.isBreakpointXS);
    this.smListener.off('change', this.isBreakpointSM);
    this.mdListener.off('change', this.isBreakpointMD);
    this.lgListener.off('change', this.isBreakpointLG);
  }
}