// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "base/memory/scoped_ptr.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/autofill/test_autofill_external_delegate.h"
#include "chrome/browser/ui/autofill/autofill_popup_controller_impl.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebAutofillClient.h"
#include "ui/gfx/display.h"
#include "ui/gfx/rect.h"

using ::testing::_;
using ::testing::AtLeast;
using WebKit::WebAutofillClient;

namespace {

class MockAutofillExternalDelegate :
      public autofill::TestAutofillExternalDelegate {
 public:
  MockAutofillExternalDelegate() : TestAutofillExternalDelegate(NULL, NULL) {};
  virtual ~MockAutofillExternalDelegate() {};

  virtual void DidSelectSuggestion(int identifier) OVERRIDE {}
  virtual void RemoveSuggestion(const string16& value, int identifier) OVERRIDE
      {}
  virtual void ClearPreviewedForm() OVERRIDE {}

  MOCK_METHOD0(ControllerDestroyed, void());
};

class TestAutofillPopupController : public AutofillPopupControllerImpl {
 public:
  explicit TestAutofillPopupController(
      AutofillExternalDelegate* external_delegate,
      const gfx::Rect& element_bounds)
      : AutofillPopupControllerImpl(external_delegate, NULL, element_bounds) {}
  virtual ~TestAutofillPopupController() {}

  void set_display(const gfx::Display display) {
    display_ = display;
  }
  virtual gfx::Display GetDisplayNearestPoint(const gfx::Point& point) const
      OVERRIDE {
    return display_;
  }

  // Making protected functions public for testing
  const std::vector<string16>& names() const {
    return AutofillPopupControllerImpl::names();
  }
  const std::vector<string16>& subtexts() const {
    return AutofillPopupControllerImpl::subtexts();
  }
  int selected_line() const {
    return AutofillPopupControllerImpl::selected_line();
  }
  void SetSelectedLine(size_t selected_line) {
    AutofillPopupControllerImpl::SetSelectedLine(selected_line);
  }
  void SelectNextLine() {
    AutofillPopupControllerImpl::SelectNextLine();
  }
  void SelectPreviousLine() {
    AutofillPopupControllerImpl::SelectPreviousLine();
  }
  bool RemoveSelectedLine() {
    return AutofillPopupControllerImpl::RemoveSelectedLine();
  }
  void DoHide() {
    AutofillPopupControllerImpl::Hide();
  }
  const gfx::Rect& popup_bounds() const {
    return AutofillPopupControllerImpl::popup_bounds();
  }
  const gfx::Rect& element_bounds() const {
    return AutofillPopupControllerImpl::element_bounds();
  }
#if !defined(OS_ANDROID)
  const gfx::Font& name_font() const {
    return AutofillPopupControllerImpl::name_font();
  }
  const gfx::Font& subtext_font() const {
    return AutofillPopupControllerImpl::subtext_font();
  }
#endif
  int GetDesiredPopupWidth() const {
    return AutofillPopupControllerImpl::GetDesiredPopupWidth();
  }
  int GetDesiredPopupHeight() const {
    return AutofillPopupControllerImpl::GetDesiredPopupHeight();
  }

  MOCK_METHOD1(InvalidateRow, void(size_t));
  MOCK_METHOD0(UpdateBoundsAndRedrawPopup, void());
  MOCK_METHOD0(Hide, void());

 private:
  virtual void ShowView() OVERRIDE {}

  gfx::Display display_;
};

}  // namespace

class AutofillPopupControllerUnitTest : public ::testing::Test {
 public:
  AutofillPopupControllerUnitTest()
    : autofill_popup_controller_(
          new testing::NiceMock<TestAutofillPopupController>(
              &external_delegate_, gfx::Rect())) {}
  virtual ~AutofillPopupControllerUnitTest() {
    // This will make sure the controller and the view (if any) are both
    // cleaned up.
    if (autofill_popup_controller_)
      autofill_popup_controller_->DoHide();
  }

  AutofillPopupController* popup_controller() {
    return autofill_popup_controller_;
  }

 protected:
  testing::NiceMock<MockAutofillExternalDelegate> external_delegate_;
  testing::NiceMock<TestAutofillPopupController>* autofill_popup_controller_;
};

TEST_F(AutofillPopupControllerUnitTest, SetBounds) {
  // Ensure the popup size can be set and causes a redraw.
  gfx::Rect popup_bounds(10, 10, 100, 100);

  EXPECT_CALL(*autofill_popup_controller_,
              UpdateBoundsAndRedrawPopup());

  popup_controller()->SetPopupBounds(popup_bounds);

  EXPECT_EQ(popup_bounds, popup_controller()->popup_bounds());
}

TEST_F(AutofillPopupControllerUnitTest, ChangeSelectedLine) {
  // Set up the popup.
  std::vector<string16> names(2, string16());
  std::vector<int> autofill_ids(2, 0);
  autofill_popup_controller_->Show(names, names, names, autofill_ids);

  EXPECT_LT(autofill_popup_controller_->selected_line(), 0);
  // Check that there are at least 2 values so that the first and last selection
  // are different.
  EXPECT_GE(2,
      static_cast<int>(autofill_popup_controller_->subtexts().size()));

  // Test wrapping before the front.
  autofill_popup_controller_->SelectPreviousLine();
  EXPECT_EQ(static_cast<int>(
      autofill_popup_controller_->subtexts().size() - 1),
      autofill_popup_controller_->selected_line());

  // Test wrapping after the end.
  autofill_popup_controller_->SelectNextLine();
  EXPECT_EQ(0, autofill_popup_controller_->selected_line());
}

TEST_F(AutofillPopupControllerUnitTest, RedrawSelectedLine) {
  // Set up the popup.
  std::vector<string16> names(2, string16());
  std::vector<int> autofill_ids(2, 0);
  autofill_popup_controller_->Show(names, names, names, autofill_ids);

  // Make sure that when a new line is selected, it is invalidated so it can
  // be updated to show it is selected.
  int selected_line = 0;
  EXPECT_CALL(*autofill_popup_controller_, InvalidateRow(selected_line));
  autofill_popup_controller_->SetSelectedLine(selected_line);

  // Ensure that the row isn't invalidated if it didn't change.
  EXPECT_CALL(*autofill_popup_controller_,
              InvalidateRow(selected_line)).Times(0);
  autofill_popup_controller_->SetSelectedLine(selected_line);

  // Change back to no selection.
  EXPECT_CALL(*autofill_popup_controller_, InvalidateRow(selected_line));
  autofill_popup_controller_->SetSelectedLine(-1);
}

TEST_F(AutofillPopupControllerUnitTest, RemoveLine) {
  // Set up the popup.
  std::vector<string16> names(3, string16());
  std::vector<int> autofill_ids;
  autofill_ids.push_back(1);
  autofill_ids.push_back(1);
  autofill_ids.push_back(WebAutofillClient::MenuItemIDAutofillOptions);
  autofill_popup_controller_->Show(names, names, names, autofill_ids);

  // Generate a popup, so it can be hidden later. It doesn't matter what the
  // external_delegate thinks is being shown in the process, since we are just
  // testing the popup here.
  autofill::GenerateTestAutofillPopup(&external_delegate_);

  // No line is selected so the removal should fail.
  EXPECT_FALSE(autofill_popup_controller_->RemoveSelectedLine());

  // Try to remove the last entry and ensure it fails (it is an option).
  autofill_popup_controller_->SetSelectedLine(
      autofill_popup_controller_->subtexts().size() - 1);
  EXPECT_FALSE(autofill_popup_controller_->RemoveSelectedLine());
  EXPECT_LE(0, autofill_popup_controller_->selected_line());

  // Remove the first entry. The popup should be redrawn since its size has
  // changed.
  EXPECT_CALL(*autofill_popup_controller_, UpdateBoundsAndRedrawPopup());
  autofill_popup_controller_->SetSelectedLine(0);
  EXPECT_TRUE(autofill_popup_controller_->RemoveSelectedLine());

  // Remove the last entry. The popup should then be hidden since there are
  // no Autofill entries left.
  EXPECT_CALL(external_delegate_, ControllerDestroyed());

  autofill_popup_controller_->SetSelectedLine(0);
  // The controller self-deletes here, don't double delete.
  EXPECT_TRUE(autofill_popup_controller_->RemoveSelectedLine());
  autofill_popup_controller_ = NULL;
}

TEST_F(AutofillPopupControllerUnitTest, SkipSeparator) {
  // Set up the popup.
  std::vector<string16> names(3, string16());
  std::vector<int> autofill_ids;
  autofill_ids.push_back(1);
  autofill_ids.push_back(WebAutofillClient::MenuItemIDSeparator);
  autofill_ids.push_back(WebAutofillClient::MenuItemIDAutofillOptions);
  autofill_popup_controller_->Show(names, names, names, autofill_ids);

  autofill_popup_controller_->SetSelectedLine(0);

  // Make sure next skips the unselectable separator.
  autofill_popup_controller_->SelectNextLine();
  EXPECT_EQ(2, autofill_popup_controller_->selected_line());

  // Make sure previous skips the unselectable separator.
  autofill_popup_controller_->SelectPreviousLine();
  EXPECT_EQ(0, autofill_popup_controller_->selected_line());
}

TEST_F(AutofillPopupControllerUnitTest, GetOrCreate) {
  MockAutofillExternalDelegate delegate;

  AutofillPopupControllerImpl* controller =
      AutofillPopupControllerImpl::GetOrCreate(
          NULL,
          &delegate,
          NULL,
          gfx::Rect());
  EXPECT_TRUE(controller);

  // This should not inform |delegate| of its destruction.
  EXPECT_CALL(delegate, ControllerDestroyed()).Times(0);
  controller->Hide();

  controller =
      AutofillPopupControllerImpl::GetOrCreate(
          NULL,
          &delegate,
          NULL,
          gfx::Rect());
  EXPECT_TRUE(controller);
  AutofillPopupControllerImpl* controller2 =
      AutofillPopupControllerImpl::GetOrCreate(
          controller,
          &delegate,
          NULL,
          gfx::Rect());
  EXPECT_EQ(controller, controller2);
  controller->Hide();

  testing::NiceMock<TestAutofillPopupController>* test_controller =
      new testing::NiceMock<TestAutofillPopupController>(&delegate,
                                                         gfx::Rect());
  EXPECT_CALL(*test_controller, Hide());

  gfx::Rect bounds(0, 0, 1, 2);
  AutofillPopupControllerImpl* controller3 =
      AutofillPopupControllerImpl::GetOrCreate(
          test_controller,
          &delegate,
          NULL,
          bounds);
  EXPECT_EQ(
      bounds,
      static_cast<AutofillPopupController*>(controller3)->element_bounds());
  controller3->Hide();

  EXPECT_CALL(delegate, ControllerDestroyed());
  delete test_controller;
}

#if !defined(OS_ANDROID)
TEST_F(AutofillPopupControllerUnitTest, ElideText) {
  std::vector<string16> names;
  names.push_back(ASCIIToUTF16("Text that will need to be trimmed"));
  names.push_back(ASCIIToUTF16("Untrimmed"));

  std::vector<string16> subtexts;
  subtexts.push_back(ASCIIToUTF16("Label that will be trimmed"));
  subtexts.push_back(ASCIIToUTF16("Untrimmed"));

  std::vector<string16> icons(2, string16());
  std::vector<int> autofill_ids(2, 0);

  // Ensure the popup will be too small to display all of the first row.
  int popup_max_width =
      autofill_popup_controller_->name_font().GetStringWidth(names[0]) +
      autofill_popup_controller_->subtext_font().GetStringWidth(subtexts[0]) -
      25;
  gfx::Rect popup_bounds = gfx::Rect(0, 0, popup_max_width, 0);
  autofill_popup_controller_->set_display(gfx::Display(0, popup_bounds));

  autofill_popup_controller_->Show(names, subtexts, icons, autofill_ids);

  // The first element was long so it should have been trimmed.
  EXPECT_NE(names[0], autofill_popup_controller_->names()[0]);
  EXPECT_NE(subtexts[0], autofill_popup_controller_->subtexts()[0]);

  // The second element was shorter so it should be unchanged.
  EXPECT_EQ(names[1], autofill_popup_controller_->names()[1]);
  EXPECT_EQ(subtexts[1], autofill_popup_controller_->subtexts()[1]);
}
#endif

TEST_F(AutofillPopupControllerUnitTest, GrowPopupInSpace) {
  std::vector<string16> names(1);
  std::vector<int> autofill_ids(1, 1);

  // Call Show so that GetDesired...() will be able to provide valid values.
  autofill_popup_controller_->Show(names, names, names, autofill_ids);
  int desired_width = autofill_popup_controller_->GetDesiredPopupWidth();
  int desired_height = autofill_popup_controller_->GetDesiredPopupHeight();

  // Setup the visible screen space.
  gfx::Display display(0, gfx::Rect(0, 0,
                                    desired_width * 2, desired_height * 2));

  // Store the possible element bounds and the popup bounds they should result
  // in.
  std::vector<gfx::Rect> element_bounds;
  std::vector<gfx::Rect> expected_popup_bounds;

  // The popup grows down and to the right.
  element_bounds.push_back(gfx::Rect(0, 0, 0, 0));
  expected_popup_bounds.push_back(
      gfx::Rect(0, 0, desired_width, desired_height));

  // The popup grows down and to the left.
  element_bounds.push_back(gfx::Rect(2 * desired_width, 0, 0, 0));
  expected_popup_bounds.push_back(
      gfx::Rect(desired_width, 0, desired_width, desired_height));

  // The popup grows up and to the right.
  element_bounds.push_back(gfx::Rect(0, 2 * desired_height, 0, 0));
  expected_popup_bounds.push_back(
      gfx::Rect(0, desired_height, desired_width, desired_height));

  // The popup grows up and to the left.
  element_bounds.push_back(
      gfx::Rect(2 * desired_width, 2 * desired_height, 0, 0));
  expected_popup_bounds.push_back(
      gfx::Rect(desired_width, desired_height, desired_width, desired_height));

  // The popup would be partial off the top and left side of the screen.
  element_bounds.push_back(
      gfx::Rect(-desired_width / 2, -desired_height / 2, 0, 0));
  expected_popup_bounds.push_back(
      gfx::Rect(0, 0, desired_width, desired_height));

  // The popup would be partially off the bottom and the right side of
  // the screen.
  element_bounds.push_back(
      gfx::Rect(desired_width * 1.5, desired_height * 1.5, 0, 0));
  expected_popup_bounds.push_back(gfx::Rect(
          desired_width / 2, desired_height /2, desired_width, desired_height));

  for (size_t i = 0; i < element_bounds.size(); ++i) {
    TestAutofillPopupController autofill_popup_controller(&external_delegate_,
                                                          element_bounds[i]);
    autofill_popup_controller.set_display(display);
    autofill_popup_controller.Show(names, names, names, autofill_ids);

    EXPECT_EQ(expected_popup_bounds[i].ToString(),
              autofill_popup_controller.popup_bounds().ToString()) <<
        "Popup bounds failed to match for test " << i;
  }
}