// Copyright 2016 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 <memory>
#include <string>
#include <vector>

#include "base/base64.h"
#include "content/public/test/browser_test.h"
#include "headless/public/devtools/domains/page.h"
#include "headless/public/devtools/domains/runtime.h"
#include "headless/public/devtools/domains/security.h"
#include "headless/public/headless_browser.h"
#include "headless/public/headless_devtools_client.h"
#include "headless/public/headless_tab_socket.h"
#include "headless/public/headless_web_contents.h"
#include "headless/test/headless_browser_test.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "third_party/skia/include/core/SkColor.h"
#include "ui/gfx/codec/png_codec.h"
#include "ui/gfx/geometry/size.h"
#include "url/gurl.h"

using testing::UnorderedElementsAre;

namespace headless {

class HeadlessWebContentsTest : public HeadlessBrowserTest {};

IN_PROC_BROWSER_TEST_F(HeadlessWebContentsTest, Navigation) {
  EXPECT_TRUE(embedded_test_server()->Start());

  HeadlessBrowserContext* browser_context =
      browser()->CreateBrowserContextBuilder().Build();

  HeadlessWebContents* web_contents =
      browser_context->CreateWebContentsBuilder()
          .SetInitialURL(embedded_test_server()->GetURL("/hello.html"))
          .Build();
  EXPECT_TRUE(WaitForLoad(web_contents));

  EXPECT_THAT(browser_context->GetAllWebContents(),
              UnorderedElementsAre(web_contents));
}

IN_PROC_BROWSER_TEST_F(HeadlessWebContentsTest, WindowOpen) {
  EXPECT_TRUE(embedded_test_server()->Start());

  HeadlessBrowserContext* browser_context =
      browser()->CreateBrowserContextBuilder().Build();

  HeadlessWebContents* web_contents =
      browser_context->CreateWebContentsBuilder()
          .SetInitialURL(embedded_test_server()->GetURL("/window_open.html"))
          .Build();
  EXPECT_TRUE(WaitForLoad(web_contents));

  EXPECT_EQ(static_cast<size_t>(2),
            browser_context->GetAllWebContents().size());
}

IN_PROC_BROWSER_TEST_F(HeadlessWebContentsTest, Focus) {
  EXPECT_TRUE(embedded_test_server()->Start());

  HeadlessBrowserContext* browser_context =
      browser()->CreateBrowserContextBuilder().Build();

  HeadlessWebContents* web_contents =
      browser_context->CreateWebContentsBuilder()
          .SetInitialURL(embedded_test_server()->GetURL("/hello.html"))
          .Build();
  EXPECT_TRUE(WaitForLoad(web_contents));

  bool result;
  EXPECT_TRUE(EvaluateScript(web_contents, "document.hasFocus()")
                  ->GetResult()
                  ->GetValue()
                  ->GetAsBoolean(&result));
  EXPECT_TRUE(result);

  HeadlessWebContents* web_contents2 =
      browser_context->CreateWebContentsBuilder()
          .SetInitialURL(embedded_test_server()->GetURL("/hello.html"))
          .Build();
  EXPECT_TRUE(WaitForLoad(web_contents2));

  // Focus of different WebContents is independent.
  EXPECT_TRUE(EvaluateScript(web_contents, "document.hasFocus()")
                  ->GetResult()
                  ->GetValue()
                  ->GetAsBoolean(&result));
  EXPECT_TRUE(result);
  EXPECT_TRUE(EvaluateScript(web_contents2, "document.hasFocus()")
                  ->GetResult()
                  ->GetValue()
                  ->GetAsBoolean(&result));
  EXPECT_TRUE(result);
}

namespace {
bool DecodePNG(std::string base64_data, SkBitmap* bitmap) {
  std::string png_data;
  if (!base::Base64Decode(base64_data, &png_data))
    return false;
  return gfx::PNGCodec::Decode(
      reinterpret_cast<unsigned const char*>(png_data.data()), png_data.size(),
      bitmap);
}
}  // namespace

// Parameter specifies whether --disable-gpu should be used.
class HeadlessWebContentsScreenshotTest
    : public HeadlessAsyncDevTooledBrowserTest,
      public ::testing::WithParamInterface<bool> {
 public:
  void SetUp() override {
    EnablePixelOutput();
    if (GetParam())
      UseSoftwareCompositing();
    HeadlessAsyncDevTooledBrowserTest::SetUp();
  }

  void RunDevTooledTest() override {
    std::unique_ptr<runtime::EvaluateParams> params =
        runtime::EvaluateParams::Builder()
            .SetExpression("document.body.style.background = '#0000ff'")
            .Build();
    devtools_client_->GetRuntime()->Evaluate(
        std::move(params),
        base::Bind(&HeadlessWebContentsScreenshotTest::OnPageSetupCompleted,
                   base::Unretained(this)));
  }

  void OnPageSetupCompleted(std::unique_ptr<runtime::EvaluateResult> result) {
    devtools_client_->GetPage()->GetExperimental()->CaptureScreenshot(
        page::CaptureScreenshotParams::Builder().SetFromSurface(true).Build(),
        base::Bind(&HeadlessWebContentsScreenshotTest::OnScreenshotCaptured,
                   base::Unretained(this)));
  }

  void OnScreenshotCaptured(
      std::unique_ptr<page::CaptureScreenshotResult> result) {
    std::string base64 = result->GetData();
    EXPECT_LT(0U, base64.length());
    SkBitmap result_bitmap;
    EXPECT_TRUE(DecodePNG(base64, &result_bitmap));

    EXPECT_EQ(800, result_bitmap.width());
    EXPECT_EQ(600, result_bitmap.height());
    SkColor actual_color = result_bitmap.getColor(400, 300);
    SkColor expected_color = SkColorSetRGB(0x00, 0x00, 0xff);
    EXPECT_EQ(expected_color, actual_color);
    FinishAsynchronousTest();
  }
};

HEADLESS_ASYNC_DEVTOOLED_TEST_P(HeadlessWebContentsScreenshotTest);

// Instantiate test case for both software and gpu compositing modes.
INSTANTIATE_TEST_CASE_P(HeadlessWebContentsScreenshotTests,
                        HeadlessWebContentsScreenshotTest,
                        ::testing::Bool());

class HeadlessWebContentsSecurityTest
    : public HeadlessAsyncDevTooledBrowserTest,
      public security::ExperimentalObserver {
 public:
  void RunDevTooledTest() override {
    devtools_client_->GetSecurity()->GetExperimental()->AddObserver(this);
    devtools_client_->GetSecurity()->GetExperimental()->Enable(
        security::EnableParams::Builder().Build());
  }

  void OnSecurityStateChanged(
      const security::SecurityStateChangedParams& params) override {
    EXPECT_EQ(security::SecurityState::NEUTRAL, params.GetSecurityState());

    devtools_client_->GetSecurity()->GetExperimental()->Disable(
        security::DisableParams::Builder().Build());
    devtools_client_->GetSecurity()->GetExperimental()->RemoveObserver(this);
    FinishAsynchronousTest();
  }
};

HEADLESS_ASYNC_DEVTOOLED_TEST_F(HeadlessWebContentsSecurityTest);

class HeadlessTabSocketTest : public HeadlessAsyncDevTooledBrowserTest,
                              public HeadlessTabSocket::Listener {
 public:
  void RunDevTooledTest() override {
    devtools_client_->GetRuntime()->Evaluate(
        R"(window.TabSocket.onmessage =
            function(event) {
              window.TabSocket.send(
                  'Embedder sent us: ' + event.detail.message);
            };
          )");

    HeadlessTabSocket* headless_tab_socket =
        web_contents_->GetHeadlessTabSocket();
    DCHECK(headless_tab_socket);

    headless_tab_socket->SendMessageToTab("Hello");
    headless_tab_socket->SetListener(this);
  }

  void OnMessageFromTab(const std::string& message) override {
    EXPECT_EQ("Embedder sent us: Hello", message);
    FinishAsynchronousTest();
  }

  bool GetCreateTabSocket() override { return true; }
};

HEADLESS_ASYNC_DEVTOOLED_TEST_F(HeadlessTabSocketTest);

}  // namespace headless