import {Direction, Directionality} from '@angular/cdk/bidi';
import {
  DOWN_ARROW,
  END,
  ENTER,
  HOME,
  LEFT_ARROW,
  PAGE_DOWN,
  PAGE_UP,
  RIGHT_ARROW,
  SPACE,
  UP_ARROW,
} from '@angular/cdk/keycodes';
import {dispatchFakeEvent, dispatchKeyboardEvent} from '@angular/cdk/testing';
import {Component} from '@angular/core';
import {async, ComponentFixture, TestBed} from '@angular/core/testing';
import {MatNativeDateModule} from '@angular/material/core';
import {DEC, FEB, JAN, MAR, NOV} from '@angular/material/testing';
import {By} from '@angular/platform-browser';
import {MatCalendarBody} from './calendar-body';
import {MatMonthView} from './month-view';

describe('MatMonthView', () => {
  let dir: {value: Direction};

  beforeEach(async(() => {
    TestBed.configureTestingModule({
      imports: [
        MatNativeDateModule,
      ],
      declarations: [
        MatCalendarBody,
        MatMonthView,

        // Test components.
        StandardMonthView,
        MonthViewWithDateFilter,
        MonthViewWithDateClass,
      ],
      providers: [
        {provide: Directionality, useFactory: () => dir = {value: 'ltr'}}
      ]
    });

    TestBed.compileComponents();
  }));

  describe('standard month view', () => {
    let fixture: ComponentFixture<StandardMonthView>;
    let testComponent: StandardMonthView;
    let monthViewNativeElement: Element;

    beforeEach(() => {
      fixture = TestBed.createComponent(StandardMonthView);
      fixture.detectChanges();

      let monthViewDebugElement = fixture.debugElement.query(By.directive(MatMonthView))!;
      monthViewNativeElement = monthViewDebugElement.nativeElement;
      testComponent = fixture.componentInstance;
    });

    it('has correct month label', () => {
      let labelEl = monthViewNativeElement.querySelector('.mat-calendar-body-label')!;
      expect(labelEl.innerHTML.trim()).toBe('JAN');
    });

    it('has 31 days', () => {
      let cellEls = monthViewNativeElement.querySelectorAll('.mat-calendar-body-cell')!;
      expect(cellEls.length).toBe(31);
    });

    it('shows selected date if in same month', () => {
      let selectedEl = monthViewNativeElement.querySelector('.mat-calendar-body-selected')!;
      expect(selectedEl.innerHTML.trim()).toBe('10');
    });

    it('does not show selected date if in different month', () => {
      testComponent.selected = new Date(2017, MAR, 10);
      fixture.detectChanges();

      let selectedEl = monthViewNativeElement.querySelector('.mat-calendar-body-selected');
      expect(selectedEl).toBeNull();
    });

    it('fires selected change event on cell clicked', () => {
      let cellEls = monthViewNativeElement.querySelectorAll('.mat-calendar-body-cell');
      (cellEls[cellEls.length - 1] as HTMLElement).click();
      fixture.detectChanges();

      let selectedEl = monthViewNativeElement.querySelector('.mat-calendar-body-selected')!;
      expect(selectedEl.innerHTML.trim()).toBe('31');
    });

    it('should mark active date', () => {
      let cellEls = monthViewNativeElement.querySelectorAll('.mat-calendar-body-cell');
      expect((cellEls[4] as HTMLElement).innerText.trim()).toBe('5');
      expect(cellEls[4].classList).toContain('mat-calendar-body-active');
    });

    describe('a11y', () => {
      it('should set the correct role on the internal table node', () => {
        const table = monthViewNativeElement.querySelector('table')!;
        expect(table.getAttribute('role')).toBe('presentation');
      });

      describe('calendar body', () => {
        let calendarBodyEl: HTMLElement;
        let calendarInstance: StandardMonthView;

        beforeEach(() => {
          calendarInstance = fixture.componentInstance;
          calendarBodyEl =
            fixture.debugElement.nativeElement.querySelector('.mat-calendar-body') as HTMLElement;
          expect(calendarBodyEl).not.toBeNull();
          dir.value = 'ltr';
          fixture.componentInstance.date = new Date(2017, JAN, 5);
          dispatchFakeEvent(calendarBodyEl, 'focus');
          fixture.detectChanges();
        });

        it('should decrement date on left arrow press', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', LEFT_ARROW);
          fixture.detectChanges();
          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 4));

          calendarInstance.date = new Date(2017, JAN, 1);
          fixture.detectChanges();

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', LEFT_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2016, DEC, 31));
        });

        it('should increment date on left arrow press in rtl', () => {
          dir.value = 'rtl';

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', LEFT_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 6));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', LEFT_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 7));
        });

        it('should increment date on right arrow press', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', RIGHT_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 6));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', RIGHT_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 7));
        });

        it('should decrement date on right arrow press in rtl', () => {
          dir.value = 'rtl';

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', RIGHT_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 4));

          calendarInstance.date = new Date(2017, JAN, 1);
          fixture.detectChanges();

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', RIGHT_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2016, DEC, 31));
        });

        it('should go up a row on up arrow press', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', UP_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2016, DEC, 29));

          calendarInstance.date = new Date(2017, JAN, 7);
          fixture.detectChanges();

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', UP_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2016, DEC, 31));
        });

        it('should go down a row on down arrow press', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', DOWN_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 12));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', DOWN_ARROW);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 19));
        });

        it('should go to beginning of the month on home press', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', HOME);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 1));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', HOME);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 1));
        });

        it('should go to end of the month on end press', () => {
          calendarInstance.date = new Date(2017, JAN, 10);

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', END);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 31));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', END);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, JAN, 31));
        });

        it('should go back one month on page up press', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', PAGE_UP);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2016, DEC, 5));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', PAGE_UP);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2016, NOV, 5));
        });

        it('should go forward one month on page down press', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', PAGE_DOWN);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, FEB, 5));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', PAGE_DOWN);
          fixture.detectChanges();

          expect(calendarInstance.date).toEqual(new Date(2017, MAR, 5));
        });

        it('should select active date on enter', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', LEFT_ARROW);
          fixture.detectChanges();

          expect(testComponent.selected).toEqual(new Date(2017, JAN, 10));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', ENTER);
          fixture.detectChanges();

          expect(testComponent.selected).toEqual(new Date(2017, JAN, 4));
        });

        it('should select active date on space', () => {
          dispatchKeyboardEvent(calendarBodyEl, 'keydown', LEFT_ARROW);
          fixture.detectChanges();

          expect(testComponent.selected).toEqual(new Date(2017, JAN, 10));

          dispatchKeyboardEvent(calendarBodyEl, 'keydown', SPACE);
          fixture.detectChanges();

          expect(testComponent.selected).toEqual(new Date(2017, JAN, 4));
        });
      });
    });
  });

  describe('month view with date filter', () => {
    let fixture: ComponentFixture<MonthViewWithDateFilter>;
    let monthViewNativeElement: Element;

    beforeEach(() => {
      fixture = TestBed.createComponent(MonthViewWithDateFilter);
      fixture.detectChanges();

      let monthViewDebugElement = fixture.debugElement.query(By.directive(MatMonthView))!;
      monthViewNativeElement = monthViewDebugElement.nativeElement;
    });

    it('should disable filtered dates', () => {
      let cells = monthViewNativeElement.querySelectorAll('.mat-calendar-body-cell');
      expect(cells[0].classList).toContain('mat-calendar-body-disabled');
      expect(cells[1].classList).not.toContain('mat-calendar-body-disabled');
    });
  });

  describe('month view with custom date classes', () => {
    let fixture: ComponentFixture<MonthViewWithDateClass>;
    let monthViewNativeElement: Element;

    beforeEach(() => {
      fixture = TestBed.createComponent(MonthViewWithDateClass);
      fixture.detectChanges();

      let monthViewDebugElement = fixture.debugElement.query(By.directive(MatMonthView))!;
      monthViewNativeElement = monthViewDebugElement.nativeElement;
    });

    it('should be able to add a custom class to some dates', () => {
      let cells = monthViewNativeElement.querySelectorAll('.mat-calendar-body-cell');
      expect(cells[0].classList).not.toContain('even');
      expect(cells[1].classList).toContain('even');
    });
  });

});


@Component({
  template: `<mat-month-view [(activeDate)]="date" [(selected)]="selected"></mat-month-view>`,
})
class StandardMonthView {
  date = new Date(2017, JAN, 5);
  selected = new Date(2017, JAN, 10);
}


@Component({
  template: `<mat-month-view [activeDate]="activeDate" [dateFilter]="dateFilter"></mat-month-view>`
})
class MonthViewWithDateFilter {
  activeDate = new Date(2017, JAN, 1);
  dateFilter(date: Date) {
    return date.getDate() % 2 == 0;
  }
}

@Component({
  template: `<mat-month-view [activeDate]="activeDate" [dateClass]="dateClass"></mat-month-view>`
})
class MonthViewWithDateClass {
  activeDate = new Date(2017, JAN, 1);
  dateClass(date: Date) {
    return date.getDate() % 2 == 0 ? 'even' : undefined;
  }
}