// 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/ui/webui/extensions/pack_extension_handler.h"

#include "base/bind.h"
#include "base/strings/utf_string_conversions.h"
#include "chrome/browser/extensions/extension_creator.h"
#include "chrome/browser/ui/chrome_select_file_policy.h"
#include "content/public/browser/web_contents.h"
#include "content/public/browser/web_contents_view.h"
#include "content/public/browser/web_ui.h"
#include "content/public/browser/web_ui_data_source.h"
#include "grit/generated_resources.h"
#include "ui/base/l10n/l10n_util.h"

namespace extensions {

PackExtensionHandler::PackExtensionHandler() {
}

PackExtensionHandler::~PackExtensionHandler() {
  // There may be pending file dialogs, we need to tell them that we've gone
  // away so they don't try and call back to us.
  if (load_extension_dialog_.get())
    load_extension_dialog_->ListenerDestroyed();

  if (pack_job_.get())
    pack_job_->ClearClient();
}

void PackExtensionHandler::GetLocalizedValues(
    content::WebUIDataSource* source) {
  source->AddString("packExtensionOverlay",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PACK_DIALOG_TITLE));
  source->AddString("packExtensionHeading",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PACK_DIALOG_HEADING));
  source->AddString("packExtensionCommit",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PACK_BUTTON));
  source->AddString("ok", l10n_util::GetStringUTF16(IDS_OK));
  source->AddString("cancel", l10n_util::GetStringUTF16(IDS_CANCEL));
  source->AddString("packExtensionRootDir",
      l10n_util::GetStringUTF16(
          IDS_EXTENSION_PACK_DIALOG_ROOT_DIRECTORY_LABEL));
  source->AddString("packExtensionPrivateKey",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PACK_DIALOG_PRIVATE_KEY_LABEL));
  source->AddString("packExtensionBrowseButton",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PACK_DIALOG_BROWSE));
  source->AddString("packExtensionProceedAnyway",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PROCEED_ANYWAY));
  source->AddString("packExtensionWarningTitle",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PACK_WARNING_TITLE));
  source->AddString("packExtensionErrorTitle",
      l10n_util::GetStringUTF16(IDS_EXTENSION_PACK_ERROR_TITLE));
}

void PackExtensionHandler::RegisterMessages() {
  web_ui()->RegisterMessageCallback(
      "pack",
      base::Bind(&PackExtensionHandler::HandlePackMessage,
                 base::Unretained(this)));
  web_ui()->RegisterMessageCallback(
      "packExtensionSelectFilePath",
      base::Bind(&PackExtensionHandler::HandleSelectFilePathMessage,
                 base::Unretained(this)));
}

void PackExtensionHandler::OnPackSuccess(const base::FilePath& crx_file,
                                         const base::FilePath& pem_file) {
  ListValue arguments;
  arguments.Append(Value::CreateStringValue(
      UTF16ToUTF8(PackExtensionJob::StandardSuccessMessage(
          crx_file, pem_file))));
  web_ui()->CallJavascriptFunction(
      "extensions.PackExtensionOverlay.showSuccessMessage", arguments);
}

void PackExtensionHandler::OnPackFailure(const std::string& error,
                                         ExtensionCreator::ErrorType type) {
  if (type == ExtensionCreator::kCRXExists) {
    base::StringValue error_str(error);
    base::StringValue extension_path_str(extension_path_.value());
    base::StringValue key_path_str(private_key_path_.value());
    base::FundamentalValue overwrite_flag(ExtensionCreator::kOverwriteCRX);

    web_ui()->CallJavascriptFunction(
        "extensions.ExtensionSettings.askToOverrideWarning",
        error_str, extension_path_str, key_path_str, overwrite_flag);
  } else {
    ShowAlert(error);
  }
}

void PackExtensionHandler::FileSelected(const base::FilePath& path, int index,
                                        void* params) {
  ListValue results;
  results.Append(Value::CreateStringValue(path.value()));
  web_ui()->CallJavascriptFunction("window.handleFilePathSelected", results);
}

void PackExtensionHandler::MultiFilesSelected(
    const std::vector<base::FilePath>& files, void* params) {
  NOTREACHED();
}

void PackExtensionHandler::HandlePackMessage(const ListValue* args) {
  DCHECK_EQ(3U, args->GetSize());

  double flags_double = 0.0;
  base::FilePath::StringType extension_path_str;
  base::FilePath::StringType private_key_path_str;
  if (!args->GetString(0, &extension_path_str) ||
      !args->GetString(1, &private_key_path_str) ||
      !args->GetDouble(2, &flags_double)) {
    NOTREACHED();
    return;
  }

  extension_path_ = base::FilePath(extension_path_str);
  private_key_path_ = base::FilePath(private_key_path_str);

  int run_flags = static_cast<int>(flags_double);

  base::FilePath root_directory = extension_path_;
  base::FilePath key_file = private_key_path_;
  last_used_path_ = extension_path_;

  if (root_directory.empty()) {
    if (extension_path_.empty()) {
      ShowAlert(l10n_util::GetStringUTF8(
          IDS_EXTENSION_PACK_DIALOG_ERROR_ROOT_REQUIRED));
    } else {
      ShowAlert(l10n_util::GetStringUTF8(
          IDS_EXTENSION_PACK_DIALOG_ERROR_ROOT_INVALID));
    }

    return;
  }

  if (!private_key_path_.empty() && key_file.empty()) {
    ShowAlert(l10n_util::GetStringUTF8(
        IDS_EXTENSION_PACK_DIALOG_ERROR_KEY_INVALID));
    return;
  }

  pack_job_ = new PackExtensionJob(this, root_directory, key_file, run_flags);
  pack_job_->Start();
}

void PackExtensionHandler::HandleSelectFilePathMessage(
    const ListValue* args) {
  DCHECK_EQ(2U, args->GetSize());

  std::string select_type;
  if (!args->GetString(0, &select_type))
    NOTREACHED();

  std::string operation;
  if (!args->GetString(1, &operation))
    NOTREACHED();

  ui::SelectFileDialog::Type type = ui::SelectFileDialog::SELECT_FOLDER;
  ui::SelectFileDialog::FileTypeInfo info;
  int file_type_index = 0;
  base::FilePath path_to_use = last_used_path_;
  if (select_type == "file") {
    type = ui::SelectFileDialog::SELECT_OPEN_FILE;
    path_to_use = base::FilePath();
  }

  base::string16 select_title;
  if (operation == "load") {
    select_title = l10n_util::GetStringUTF16(IDS_EXTENSION_LOAD_FROM_DIRECTORY);
  } else if (operation == "pem") {
    select_title = l10n_util::GetStringUTF16(
        IDS_EXTENSION_PACK_DIALOG_SELECT_KEY);
    info.extensions.push_back(std::vector<base::FilePath::StringType>());
        info.extensions.front().push_back(FILE_PATH_LITERAL("pem"));
        info.extension_description_overrides.push_back(
            l10n_util::GetStringUTF16(
                IDS_EXTENSION_PACK_DIALOG_KEY_FILE_TYPE_DESCRIPTION));
        info.include_all_files = true;
    file_type_index = 1;
  } else {
    NOTREACHED();
  }

  load_extension_dialog_ = ui::SelectFileDialog::Create(
      this, new ChromeSelectFilePolicy(web_ui()->GetWebContents()));
  load_extension_dialog_->SelectFile(
      type,
      select_title,
      path_to_use,
      &info,
      file_type_index,
      base::FilePath::StringType(),
      web_ui()->GetWebContents()->GetView()->GetTopLevelNativeWindow(),
      NULL);
}

void PackExtensionHandler::ShowAlert(const std::string& message) {
  ListValue arguments;
  arguments.Append(Value::CreateStringValue(message));
  web_ui()->CallJavascriptFunction(
      "extensions.PackExtensionOverlay.showError", arguments);
}

}  // namespace extensions