// Copyright 2020 The Chromium OS Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

package ui

import (
	"context"

	"chromiumos/tast/errors"
	"chromiumos/tast/local/bundles/cros/ui/perfutil"
	"chromiumos/tast/local/chrome"
	"chromiumos/tast/local/chrome/ash"
	"chromiumos/tast/local/chrome/display"
	"chromiumos/tast/local/input"
	"chromiumos/tast/local/power"
	"chromiumos/tast/local/ui"
	"chromiumos/tast/testing"
	"chromiumos/tast/testing/hwdep"
)

func init() {
	testing.AddTest(&testing.Test{
		Func:         DragWindowFromShelfPerf,
		Desc:         "Measures the presentation time of dragging a window from the shelf in tablet mode",
		Contacts:     []string{"tbarzic@chromium.org", "xdai@chromium.org", "chromeos-wmp@google.com"},
		Attr:         []string{"group:crosbolt", "crosbolt_perbuild"},
		SoftwareDeps: []string{"chrome"},
		HardwareDeps: hwdep.D(hwdep.InternalDisplay()),
		Fixture:      "chromeLoggedIn",
	})
}

func DragWindowFromShelfPerf(ctx context.Context, s *testing.State) {
	// Ensure display on to record ui performance correctly.
	if err := power.TurnOnDisplay(ctx); err != nil {
		s.Fatal("Failed to turn on display: ", err)
	}

	cr := s.FixtValue().(*chrome.Chrome)

	tconn, err := cr.TestAPIConn(ctx)
	if err != nil {
		s.Fatal("Failed to connect to test API: ", err)
	}

	orientation, err := display.GetOrientation(ctx, tconn)
	if err != nil {
		s.Fatal("Failed to obtain the display rotation: ", err)
	}

	cleanup, err := ash.EnsureTabletModeEnabled(ctx, tconn, true)
	if err != nil {
		s.Fatal("Failed to ensure in tablet mode: ", err)
	}
	defer cleanup(ctx)

	// Prepare the touch screen as this test requires touch scroll events.
	tsw, err := input.Touchscreen(ctx)
	if err != nil {
		s.Fatal("Failed to create touch screen event writer: ", err)
	}
	defer tsw.Close()

	if err = tsw.SetRotation(-orientation.Angle); err != nil {
		s.Fatal("Failed to set rotation: ", err)
	}

	stw, err := tsw.NewSingleTouchWriter()
	if err != nil {
		s.Fatal("Failed to create single touch writer: ", err)
	}
	defer stw.Close()

	const numWindows = 8
	if err := ash.CreateWindows(ctx, tconn, cr, ui.PerftestURL, numWindows); err != nil {
		s.Fatal("Failed to open browser windows: ", err)
	}

	pv := perfutil.RunMultiple(ctx, s, cr, perfutil.RunAndWaitAll(tconn, func(ctx context.Context) error {
		if err := ash.DragToShowOverview(ctx, tsw, stw, tconn); err != nil {
			return errors.Wrap(err, "failed to drag from bottom of the screen to show overview")
		}
		// Clear the overview mode state so that the next drag can enter into the
		// overview mode.
		return ash.SetOverviewModeAndWait(ctx, tconn, false)
	},
		"Ash.DragWindowFromShelf.PresentationTime",
		"Ash.DragWindowFromShelf.PresentationTime.MaxLatency"),
		perfutil.StoreLatency)

	if err := pv.Save(ctx, s.OutDir()); err != nil {
		s.Error("Failed saving perf data: ", err)
	}
}