// 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 "chrome/browser/extensions/extension_function_test_utils.h"

#include <string>

#include "base/files/file_path.h"
#include "base/json/json_reader.h"
#include "base/macros.h"
#include "base/values.h"
#include "chrome/browser/extensions/api/tabs/tabs_constants.h"
#include "chrome/browser/profiles/profile.h"
#include "chrome/browser/ui/browser.h"
#include "components/crx_file/id_util.h"
#include "extensions/browser/api_test_utils.h"
#include "extensions/browser/extension_function.h"
#include "extensions/browser/extension_function_dispatcher.h"
#include "extensions/common/extension.h"
#include "testing/gtest/include/gtest/gtest.h"

using content::WebContents;
using extensions::Extension;
using extensions::Manifest;
namespace keys = extensions::tabs_constants;

namespace {

class TestFunctionDispatcherDelegate
    : public extensions::ExtensionFunctionDispatcher::Delegate {
 public:
  explicit TestFunctionDispatcherDelegate(Browser* browser) :
      browser_(browser) {}
  ~TestFunctionDispatcherDelegate() override {}

 private:
  extensions::WindowController* GetExtensionWindowController() const override {
    return browser_->extension_window_controller();
  }

  WebContents* GetAssociatedWebContents() const override { return NULL; }

  Browser* browser_;
};

}  // namespace

namespace extension_function_test_utils {

base::ListValue* ParseList(const std::string& data) {
  scoped_ptr<base::Value> result = base::JSONReader::Read(data);
  base::ListValue* list = NULL;
  result->GetAsList(&list);
  ignore_result(result.release());
  return list;
}

base::DictionaryValue* ToDictionary(base::Value* val) {
  EXPECT_TRUE(val);
  EXPECT_EQ(base::Value::TYPE_DICTIONARY, val->GetType());
  return static_cast<base::DictionaryValue*>(val);
}

base::ListValue* ToList(base::Value* val) {
  EXPECT_TRUE(val);
  EXPECT_EQ(base::Value::TYPE_LIST, val->GetType());
  return static_cast<base::ListValue*>(val);
}

bool HasPrivacySensitiveFields(base::DictionaryValue* val) {
  std::string result;
  if (val->GetString(keys::kUrlKey, &result) ||
      val->GetString(keys::kTitleKey, &result) ||
      val->GetString(keys::kFaviconUrlKey, &result))
    return true;
  return false;
}

std::string RunFunctionAndReturnError(UIThreadExtensionFunction* function,
                                      const std::string& args,
                                      Browser* browser) {
  return RunFunctionAndReturnError(function, args, browser, NONE);
}
std::string RunFunctionAndReturnError(UIThreadExtensionFunction* function,
                                      const std::string& args,
                                      Browser* browser,
                                      RunFunctionFlags flags) {
  scoped_refptr<ExtensionFunction> function_owner(function);
  // Without a callback the function will not generate a result.
  function->set_has_callback(true);
  RunFunction(function, args, browser, flags);
  EXPECT_FALSE(function->GetResultList()) << "Did not expect a result";
  return function->GetError();
}

base::Value* RunFunctionAndReturnSingleResult(
    UIThreadExtensionFunction* function,
    const std::string& args,
    Browser* browser) {
  return RunFunctionAndReturnSingleResult(function, args, browser, NONE);
}
base::Value* RunFunctionAndReturnSingleResult(
    UIThreadExtensionFunction* function,
    const std::string& args,
    Browser* browser,
    RunFunctionFlags flags) {
  scoped_refptr<ExtensionFunction> function_owner(function);
  // Without a callback the function will not generate a result.
  function->set_has_callback(true);
  RunFunction(function, args, browser, flags);
  EXPECT_TRUE(function->GetError().empty()) << "Unexpected error: "
      << function->GetError();
  const base::Value* single_result = NULL;
  if (function->GetResultList() != NULL &&
      function->GetResultList()->Get(0, &single_result)) {
    return single_result->DeepCopy();
  }
  return NULL;
}

// This helps us be able to wait until an UIThreadExtensionFunction calls
// SendResponse.
class SendResponseDelegate
    : public UIThreadExtensionFunction::DelegateForTests {
 public:
  SendResponseDelegate() : should_post_quit_(false) {}

  virtual ~SendResponseDelegate() {}

  void set_should_post_quit(bool should_quit) {
    should_post_quit_ = should_quit;
  }

  bool HasResponse() {
    return response_.get() != NULL;
  }

  bool GetResponse() {
    EXPECT_TRUE(HasResponse());
    return *response_.get();
  }

  void OnSendResponse(UIThreadExtensionFunction* function,
                      bool success,
                      bool bad_message) override {
    ASSERT_FALSE(bad_message);
    ASSERT_FALSE(HasResponse());
    response_.reset(new bool);
    *response_ = success;
    if (should_post_quit_) {
      base::MessageLoopForUI::current()->QuitWhenIdle();
    }
  }

 private:
  scoped_ptr<bool> response_;
  bool should_post_quit_;
};

bool RunFunction(UIThreadExtensionFunction* function,
                 const std::string& args,
                 Browser* browser,
                 RunFunctionFlags flags) {
  scoped_ptr<base::ListValue> parsed_args(ParseList(args));
  EXPECT_TRUE(parsed_args.get())
      << "Could not parse extension function arguments: " << args;
  return RunFunction(function, parsed_args.Pass(), browser, flags);
}

bool RunFunction(UIThreadExtensionFunction* function,
                 scoped_ptr<base::ListValue> args,
                 Browser* browser,
                 RunFunctionFlags flags) {
  TestFunctionDispatcherDelegate dispatcher_delegate(browser);
  scoped_ptr<extensions::ExtensionFunctionDispatcher> dispatcher(
      new extensions::ExtensionFunctionDispatcher(browser->profile()));
  dispatcher->set_delegate(&dispatcher_delegate);
  // TODO(yoz): The cast is a hack; these flags should be defined in
  // only one place.  See crbug.com/394840.
  return extensions::api_test_utils::RunFunction(
      function,
      args.Pass(),
      browser->profile(),
      dispatcher.Pass(),
      static_cast<extensions::api_test_utils::RunFunctionFlags>(flags));
}

} // namespace extension_function_test_utils