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

#include "chrome/browser/printing/print_preview_dialog_controller.h"

#include <memory>
#include <string>

#include "base/memory/raw_ref.h"
#include "build/build_config.h"
#include "chrome/browser/printing/print_preview_test.h"
#include "chrome/browser/printing/print_view_manager.h"
#include "chrome/browser/ui/browser_commands.h"
#include "chrome/browser/ui/browser_finder.h"
#include "chrome/browser/ui/tabs/tab_strip_model.h"
#include "chrome/browser/ui/webui/print_preview/print_preview_ui.h"
#include "chrome/test/base/dialog_test_browser_window.h"
#include "content/public/browser/navigation_controller.h"
#include "content/public/browser/navigation_details.h"
#include "content/public/browser/navigation_entry.h"
#include "content/public/browser/web_contents_delegate.h"
#include "content/public/browser/web_contents_observer.h"
#include "content/public/common/url_constants.h"
#include "content/public/test/mock_render_process_host.h"
#include "content/public/test/navigation_simulator.h"
#include "content/public/test/test_utils.h"
#include "content/public/test/web_contents_tester.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/gfx/geometry/size.h"
#include "ui/web_dialogs/web_dialog_delegate.h"
#include "url/gurl.h"

using content::WebContents;
using content::WebContentsObserver;

namespace {

// content::WebContentsDelegate destructor is protected: subclass for testing.
class TestWebContentsDelegate : public content::WebContentsDelegate {};

}  // namespace

namespace printing {

using PrintPreviewDialogControllerUnitTest = PrintPreviewTest;

TEST_F(PrintPreviewDialogControllerUnitTest, IsPrintPreviewURL) {
  EXPECT_TRUE(PrintPreviewDialogController::IsPrintPreviewURL(
      GURL("chrome://print/fake-path")));
  EXPECT_FALSE(PrintPreviewDialogController::IsPrintPreviewURL(
      GURL("chrome-untrusted://print/fake-path")));
}

TEST_F(PrintPreviewDialogControllerUnitTest, IsPrintPreviewContentURL) {
  EXPECT_TRUE(PrintPreviewDialogController::IsPrintPreviewContentURL(
      GURL("chrome-untrusted://print/fake-path")));
  EXPECT_FALSE(PrintPreviewDialogController::IsPrintPreviewContentURL(
      GURL("chrome://print/fake-path")));
}

// Create/Get a preview dialog for initiator.
TEST_F(PrintPreviewDialogControllerUnitTest, GetOrCreatePreviewDialog) {
  // Lets start with one window with one tab.
  EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
  EXPECT_EQ(0, browser()->tab_strip_model()->count());
  chrome::NewTab(browser());
  EXPECT_EQ(1, browser()->tab_strip_model()->count());

  // Create a reference to initiator contents.
  WebContents* initiator = browser()->tab_strip_model()->GetActiveWebContents();

  PrintPreviewDialogController* dialog_controller =
      PrintPreviewDialogController::GetInstance();
  ASSERT_TRUE(dialog_controller);

  // Get the preview dialog for initiator.
  PrintViewManager::FromWebContents(initiator)->PrintPreviewNow(
      initiator->GetPrimaryMainFrame(), false);
  WebContents* preview_dialog =
      dialog_controller->GetOrCreatePreviewDialogForTesting(initiator);

  // New print preview dialog is a constrained window, so the number of tabs is
  // still 1.
  EXPECT_EQ(1, browser()->tab_strip_model()->count());
  EXPECT_NE(initiator, preview_dialog);

  // Get the print preview dialog for the same initiator.
  WebContents* new_preview_dialog =
      dialog_controller->GetOrCreatePreviewDialogForTesting(initiator);

  // Preview dialog already exists. Tab count remains the same.
  EXPECT_EQ(1, browser()->tab_strip_model()->count());

  // 1:1 relationship between initiator and preview dialog.
  EXPECT_EQ(new_preview_dialog, preview_dialog);
}

// Tests multiple print preview dialogs exist in the same browser for different
// initiators. If a preview dialog already exists for an initiator, that
// initiator gets focused.
//
// Flaky on Mac. https://crbug.com/845844
#if BUILDFLAG(IS_MAC)
#define MAYBE_MultiplePreviewDialogs DISABLED_MultiplePreviewDialogs
#else
#define MAYBE_MultiplePreviewDialogs MultiplePreviewDialogs
#endif
TEST_F(PrintPreviewDialogControllerUnitTest, MAYBE_MultiplePreviewDialogs) {
  // Lets start with one window and two tabs.
  EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
  TabStripModel* tab_strip_model = browser()->tab_strip_model();
  ASSERT_TRUE(tab_strip_model);

  EXPECT_EQ(0, tab_strip_model->count());

  // Create some new initiators.
  chrome::NewTab(browser());
  WebContents* web_contents_1 = tab_strip_model->GetActiveWebContents();
  ASSERT_TRUE(web_contents_1);

  chrome::NewTab(browser());
  WebContents* web_contents_2 = tab_strip_model->GetActiveWebContents();
  ASSERT_TRUE(web_contents_2);
  EXPECT_EQ(2, tab_strip_model->count());

  PrintPreviewDialogController* dialog_controller =
      PrintPreviewDialogController::GetInstance();
  ASSERT_TRUE(dialog_controller);

  // Create preview dialog for `web_contents_1`
  PrintViewManager::FromWebContents(web_contents_1)
      ->PrintPreviewNow(web_contents_1->GetPrimaryMainFrame(), false);
  WebContents* preview_dialog_1 =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents_1);

  EXPECT_NE(web_contents_1, preview_dialog_1);
  EXPECT_EQ(2, tab_strip_model->count());

  // Create preview dialog for `web_contents_2`
  PrintViewManager::FromWebContents(web_contents_2)
      ->PrintPreviewNow(web_contents_2->GetPrimaryMainFrame(), false);
  WebContents* preview_dialog_2 =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents_2);

  EXPECT_NE(web_contents_2, preview_dialog_2);
  EXPECT_NE(preview_dialog_1, preview_dialog_2);
  // 2 initiators and 2 preview dialogs exist in the same browser.  The preview
  // dialogs are constrained in their respective initiators.
  EXPECT_EQ(2, tab_strip_model->count());

  int tab_1_index = tab_strip_model->GetIndexOfWebContents(web_contents_1);
  int tab_2_index = tab_strip_model->GetIndexOfWebContents(web_contents_2);
  EXPECT_NE(tab_1_index, tab_2_index);

  int preview_dialog_1_index =
      tab_strip_model->GetIndexOfWebContents(preview_dialog_1);
  int preview_dialog_2_index =
      tab_strip_model->GetIndexOfWebContents(preview_dialog_2);

  // Constrained dialogs are not in the TabStripModel.
  EXPECT_EQ(-1, preview_dialog_1_index);
  EXPECT_EQ(-1, preview_dialog_2_index);

  // Since `preview_dialog_2_index` was the most recently created dialog, its
  // initiator should have focus.
  EXPECT_EQ(tab_2_index, tab_strip_model->active_index());

  // When we get the preview dialog for `web_contents_1`, `preview_dialog_2`
  // remains activated and focused. The previous behavior was to activate
  // `preview_dialog_1`, but that allowed tabs to steal focus.
  dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents_1);
  EXPECT_EQ(tab_2_index, tab_strip_model->active_index());
}

// Check clearing the initiator details associated with a print preview dialog
// allows the initiator to create another print preview dialog.
TEST_F(PrintPreviewDialogControllerUnitTest, ClearInitiatorDetails) {
  // Lets start with one window with one tab.
  EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
  EXPECT_EQ(0, browser()->tab_strip_model()->count());
  chrome::NewTab(browser());
  EXPECT_EQ(1, browser()->tab_strip_model()->count());

  // Create a reference to initiator contents.
  WebContents* initiator = browser()->tab_strip_model()->GetActiveWebContents();

  PrintPreviewDialogController* dialog_controller =
      PrintPreviewDialogController::GetInstance();
  ASSERT_TRUE(dialog_controller);

  // Get the preview dialog for the initiator.
  PrintViewManager::FromWebContents(initiator)->PrintPreviewNow(
      initiator->GetPrimaryMainFrame(), false);
  WebContents* preview_dialog =
      dialog_controller->GetOrCreatePreviewDialogForTesting(initiator);

  // New print preview dialog is a constrained window, so the number of tabs is
  // still 1.
  EXPECT_EQ(1, browser()->tab_strip_model()->count());
  EXPECT_NE(initiator, preview_dialog);

  // Clear the initiator details associated with the preview dialog.
  dialog_controller->EraseInitiatorInfo(preview_dialog);

  // Get a new print preview dialog for the initiator.
  WebContents* new_preview_dialog =
      dialog_controller->GetOrCreatePreviewDialogForTesting(initiator);

  // New print preview dialog is a constrained window, so the number of tabs is
  // still 1.
  EXPECT_EQ(1, browser()->tab_strip_model()->count());
  // Verify a new print preview dialog has been created.
  EXPECT_NE(new_preview_dialog, preview_dialog);
}

// Test that print preview dialogs close on navigation to new pages
// and when navigating to old pages via fwd/back, but that auto navigation
// (typed + address bar) to an existing page as occurs in gmail does not cause
// the dialogs to close.
TEST_F(PrintPreviewDialogControllerUnitTest, CloseDialogOnNavigation) {
  // Two similar URLs (same webpage, different URL fragment/query)
  // Gmail navigates from fragment to query when opening an email to print.
  GURL tiger("https://www.google.com/#q=tiger");
  GURL tiger_barb("https://www.google.com/#?q=tiger+barb");

  // Set up by opening a new tab and getting web contents
  EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
  EXPECT_EQ(0, browser()->tab_strip_model()->count());
  chrome::NewTab(browser());
  EXPECT_EQ(1, browser()->tab_strip_model()->count());
  WebContents* web_contents =
      browser()->tab_strip_model()->GetActiveWebContents();
  ASSERT_TRUE(web_contents);

  // Navigate to first page
  content::NavigationSimulator::NavigateAndCommitFromBrowser(web_contents,
                                                             tiger);
  EXPECT_EQ(tiger, web_contents->GetLastCommittedURL());

  // Get the preview dialog
  PrintPreviewDialogController* dialog_controller =
      PrintPreviewDialogController::GetInstance();
  ASSERT_TRUE(dialog_controller);
  WebContents* tiger_preview_dialog =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents);
  PrintViewManager* manager = PrintViewManager::FromWebContents(web_contents);
  manager->PrintPreviewNow(web_contents->GetPrimaryMainFrame(), false);

  // New print preview dialog is a constrained window, so the number of tabs is
  // still 1.
  EXPECT_EQ(1, browser()->tab_strip_model()->count());
  EXPECT_NE(web_contents, tiger_preview_dialog);
  content::WebContentsDestroyedWatcher tiger_destroyed(tiger_preview_dialog);

  // Navigate via link to a similar page.
  content::NavigationSimulator::NavigateAndCommitFromBrowser(web_contents,
                                                             tiger_barb);

  // Check navigation was successful
  EXPECT_EQ(tiger_barb, web_contents->GetLastCommittedURL());

  // Print preview now should return true as the navigation should have closed
  // `tiger_preview_dialog` and the previous dialog should have closed.
  EXPECT_TRUE(
      manager->PrintPreviewNow(web_contents->GetPrimaryMainFrame(), false));
  WebContents* tiger_barb_preview_dialog =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents);
  ASSERT_TRUE(tiger_barb_preview_dialog);

  // Check a new dialog was created - either the pointers should be different or
  // the previous web contents must have been destroyed.
  EXPECT_TRUE(tiger_destroyed.IsDestroyed() ||
              tiger_barb_preview_dialog != tiger_preview_dialog);
  EXPECT_NE(tiger_barb_preview_dialog, web_contents);
  content::WebContentsDestroyedWatcher tiger_barb_destroyed(
      tiger_barb_preview_dialog);

  // Now this returns false as `tiger_barb_preview_dialog` is open.
  EXPECT_FALSE(
      manager->PrintPreviewNow(web_contents->GetPrimaryMainFrame(), false));

  // Navigate with back button or ALT+LEFT ARROW to a similar page.
  content::NavigationSimulator::GoBack(web_contents);
  EXPECT_EQ(tiger, web_contents->GetLastCommittedURL());
  EXPECT_TRUE(
      manager->PrintPreviewNow(web_contents->GetPrimaryMainFrame(), false));

  // Get new dialog
  WebContents* tiger_preview_dialog_2 =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents);
  ASSERT_TRUE(tiger_preview_dialog_2);

  // Verify this is a new dialog.
  EXPECT_TRUE(tiger_barb_destroyed.IsDestroyed() ||
              tiger_barb_preview_dialog != tiger_preview_dialog_2);
  EXPECT_NE(tiger_preview_dialog_2, web_contents);
  content::WebContentsDestroyedWatcher tiger_2_destroyed(
      tiger_preview_dialog_2);

  // Try to simulate Gmail navigation: Navigate to an existing page (via
  // Forward) but modify the navigation type while pending to look like an
  // address bar + typed transition (like Gmail auto navigation)
  std::unique_ptr<content::NavigationSimulator> forward_nav =
      content::NavigationSimulator::CreateHistoryNavigation(
          1, web_contents, /*is_renderer_initiated=*/false);
  forward_nav->Start();
  web_contents->GetController().GetPendingEntry()->SetTransitionType(
      ui::PageTransitionFromInt(ui::PAGE_TRANSITION_TYPED |
                                ui::PAGE_TRANSITION_FROM_ADDRESS_BAR));
  forward_nav->Commit();
  // Navigation successful
  EXPECT_EQ(tiger_barb, web_contents->GetLastCommittedURL());

  // Print preview should not have changed due to this navigation type so print
  // preview now should return false, dialog is still alive, and the dialog
  // returned by GetOrCreatePreviewDialogForTesting() should be the same as the
  // earlier dialog.
  EXPECT_FALSE(
      manager->PrintPreviewNow(web_contents->GetPrimaryMainFrame(), false));
  EXPECT_FALSE(tiger_2_destroyed.IsDestroyed());
  WebContents* tiger_preview_dialog_2b =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents);
  ASSERT_TRUE(tiger_preview_dialog_2b);
  EXPECT_EQ(tiger_preview_dialog_2b, tiger_preview_dialog_2);
  EXPECT_NE(tiger_preview_dialog_2b, web_contents);

  // Navigate with back button or ALT+LEFT ARROW to a similar page.
  content::NavigationSimulator::GoBack(web_contents);
  EXPECT_EQ(tiger, web_contents->GetLastCommittedURL());
  EXPECT_TRUE(
      manager->PrintPreviewNow(web_contents->GetPrimaryMainFrame(), false));

  // Get new dialog
  WebContents* tiger_preview_dialog_3 =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents);
  ASSERT_TRUE(tiger_preview_dialog_3);

  // Verify this is a new dialog.
  EXPECT_TRUE(tiger_barb_destroyed.IsDestroyed() ||
              tiger_preview_dialog_2 != tiger_preview_dialog_3);
  EXPECT_NE(tiger_preview_dialog_3, web_contents);
  content::WebContentsDestroyedWatcher tiger_3_destroyed(
      tiger_preview_dialog_3);

  // Try to simulate renderer reloading a PWA page: Navigate to an existing page
  // (via Forward) but modify the navigation type while pending to look like a
  // PAGE_TRANSITION_AUTO_BOOKMARK.
  forward_nav = content::NavigationSimulator::CreateHistoryNavigation(
      1, web_contents, /*is_renderer_initiated=*/false);
  forward_nav->Start();
  web_contents->GetController().GetPendingEntry()->SetTransitionType(
      ui::PageTransitionFromInt(ui::PAGE_TRANSITION_AUTO_BOOKMARK));
  forward_nav->Commit();
  // Navigation successful
  EXPECT_EQ(tiger_barb, web_contents->GetLastCommittedURL());

  // Print preview should not have changed due to this navigation type so print
  // preview now should return false, dialog is still alive, and the dialog
  // returned by GetOrCreatePreviewDialogForTesting() should be the same as the
  // earlier dialog.
  EXPECT_FALSE(
      manager->PrintPreviewNow(web_contents->GetPrimaryMainFrame(), false));
  EXPECT_FALSE(tiger_3_destroyed.IsDestroyed());
  WebContents* tiger_preview_dialog_3b =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents);
  ASSERT_TRUE(tiger_preview_dialog_3);
  EXPECT_EQ(tiger_preview_dialog_3b, tiger_preview_dialog_3);
  EXPECT_NE(tiger_preview_dialog_3, web_contents);
}

// Tests preview dialog controller cleans up correctly and does not throw errors
// on a renderer process crash. Checks that the renderer process closed
// notification is still received even if one of two preview dialogs with the
// same renderer process host is closed before the process "crashes".
TEST_F(PrintPreviewDialogControllerUnitTest, MultiplePreviewDialogsClose) {
  // Set up the browser.
  EXPECT_EQ(1u, chrome::GetTotalBrowserCount());
  TabStripModel* tab_strip_model = browser()->tab_strip_model();
  ASSERT_TRUE(tab_strip_model);
  EXPECT_EQ(0, tab_strip_model->count());

  // Create a new tab with contents `web_contents_1`
  chrome::NewTab(browser());
  WebContents* web_contents_1 = tab_strip_model->GetActiveWebContents();
  ASSERT_TRUE(web_contents_1);
  EXPECT_EQ(1, tab_strip_model->count());
  PrintPreviewDialogController* dialog_controller =
      PrintPreviewDialogController::GetInstance();
  ASSERT_TRUE(dialog_controller);

  // Create preview dialog for `web_contents_1`. Should not create a new tab.
  PrintViewManager::FromWebContents(web_contents_1)
      ->PrintPreviewNow(web_contents_1->GetPrimaryMainFrame(), false);
  WebContents* preview_dialog_1 =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents_1);
  EXPECT_NE(web_contents_1, preview_dialog_1);
  EXPECT_EQ(1, tab_strip_model->count());

  // Create a new tab with contents `web_contents_2`
  chrome::NewTab(browser());
  WebContents* web_contents_2 = tab_strip_model->GetActiveWebContents();
  ASSERT_TRUE(web_contents_2);
  EXPECT_EQ(2, tab_strip_model->count());

  // Create preview dialog for `web_contents_2`
  PrintViewManager::FromWebContents(web_contents_2)
      ->PrintPreviewNow(web_contents_2->GetPrimaryMainFrame(), false);
  WebContents* preview_dialog_2 =
      dialog_controller->GetOrCreatePreviewDialogForTesting(web_contents_2);
  EXPECT_NE(web_contents_2, preview_dialog_2);
  EXPECT_NE(preview_dialog_1, preview_dialog_2);

  // 2 initiators and 2 preview dialogs exist in the same browser.  The preview
  // dialogs are constrained in their respective initiators.
  EXPECT_EQ(2, tab_strip_model->count());

  // Close `web_contents_1`'s tab
  int tab_1_index = tab_strip_model->GetIndexOfWebContents(web_contents_1);
  tab_strip_model->CloseWebContentsAt(tab_1_index, 0);
  EXPECT_EQ(1, tab_strip_model->count());

  // Simulate a crash of the render process host for `web_contents_2`. Print
  // preview controller should exit cleanly and not crash.
  content::MockRenderProcessHost* rph =
      static_cast<content::MockRenderProcessHost*>(
          web_contents_2->GetPrimaryMainFrame()->GetProcess());
  rph->SimulateCrash();
}

class PrintPreviewDialogControllerDialogDelegateTest
    : public PrintPreviewDialogControllerUnitTest {
 public:
  class DialogTestBrowserWindowWithMaxDialogSize
      : public DialogTestBrowserWindow {
   public:
    explicit DialogTestBrowserWindowWithMaxDialogSize(
        PrintPreviewDialogControllerDialogDelegateTest& owner)
        : owner_(owner) {}
    ~DialogTestBrowserWindowWithMaxDialogSize() override = default;

    // DialogTestBrowserWindow:
    gfx::Size GetMaximumDialogSize() override { return owner_->size(); }

   private:
    const raw_ref<PrintPreviewDialogControllerDialogDelegateTest> owner_;
  };

  PrintPreviewDialogControllerDialogDelegateTest() = default;
  ~PrintPreviewDialogControllerDialogDelegateTest() override = default;

  // PrintPreviewDialogControllerUnitTest:
  std::unique_ptr<BrowserWindow> CreateBrowserWindow() override {
    return std::make_unique<DialogTestBrowserWindowWithMaxDialogSize>(*this);
  }

  std::unique_ptr<ui::WebDialogDelegate> CreateDelegateWithSize(
      const gfx::Size& size) {
    size_ = size;
    chrome::NewTab(browser());
    WebContents* initiator =
        browser()->tab_strip_model()->GetActiveWebContents();
    return PrintPreviewDialogController::
        CreatePrintPreviewDialogDelegateForTesting(initiator);
  }

  const gfx::Size& size() const { return size_; }

 private:
  gfx::Size size_;
};

TEST_F(PrintPreviewDialogControllerDialogDelegateTest, GetDialogSizeMinSize) {
  auto delegate = CreateDelegateWithSize({0, 0});
  ASSERT_TRUE(delegate);

  gfx::Size size;
  delegate->GetDialogSize(&size);
  EXPECT_EQ(750, size.width());
  EXPECT_EQ(455, size.height());
}

TEST_F(PrintPreviewDialogControllerDialogDelegateTest, GetDialogSizeHD) {
  auto delegate = CreateDelegateWithSize({1920, 1080});
  ASSERT_TRUE(delegate);

  gfx::Size size;
  delegate->GetDialogSize(&size);
  EXPECT_EQ(1309, size.width());
  EXPECT_EQ(863, size.height());
}

TEST_F(PrintPreviewDialogControllerDialogDelegateTest, GetDialogSizeUWFHD) {
  auto delegate = CreateDelegateWithSize({2560, 1080});
  ASSERT_TRUE(delegate);

  gfx::Size size;
  delegate->GetDialogSize(&size);
  EXPECT_EQ(1757, size.width());
  EXPECT_EQ(1055, size.height());
}

}  // namespace printing