// 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/utf_string_conversions.h"
#include "chrome/browser/autocomplete_history_manager.h"
#include "chrome/browser/autofill/autofill_external_delegate.h"
#include "chrome/browser/autofill/autofill_manager.h"
#include "chrome/common/autofill_messages.h"
#include "chrome/common/chrome_constants.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/web_contents.h"
#include "grit/chromium_strings.h"
#include "grit/generated_resources.h"
#include "third_party/WebKit/Source/WebKit/chromium/public/WebAutofillClient.h"
#include "ui/base/l10n/l10n_util.h"

using content::RenderViewHost;
using WebKit::WebAutofillClient;

AutofillExternalDelegate::~AutofillExternalDelegate() {
}

AutofillExternalDelegate::AutofillExternalDelegate(
    TabContentsWrapper* tab_contents_wrapper,
    AutofillManager* autofill_manager)
    : tab_contents_wrapper_(tab_contents_wrapper),
      autofill_manager_(autofill_manager),
      password_autofill_manager_(
          tab_contents_wrapper ? tab_contents_wrapper->web_contents() : NULL),
      autofill_query_id_(0),
      display_warning_if_disabled_(false),
      has_shown_autofill_popup_for_current_edit_(false) {
}

void AutofillExternalDelegate::SelectAutofillSuggestionAtIndex(int unique_id) {
  if (unique_id == WebAutofillClient::MenuItemIDAutofillOptions ||
      unique_id == WebAutofillClient::MenuItemIDClearForm ||
      unique_id == WebAutofillClient::MenuItemIDWarningMessage)
    return;

  ClearPreviewedForm();

  if (unique_id == WebAutofillClient::MenuItemIDPasswordEntry)
    return;

  FillAutofillFormData(unique_id, true);
}

void AutofillExternalDelegate::OnQuery(int query_id,
                                       const webkit::forms::FormData& form,
                                       const webkit::forms::FormField& field,
                                       const gfx::Rect& bounds,
                                       bool display_warning_if_disabled) {
  autofill_query_form_ = form;
  autofill_query_field_ = field;
  display_warning_if_disabled_ = display_warning_if_disabled;
  autofill_query_id_ = query_id;

  OnQueryPlatformSpecific(query_id, form, field, bounds);
}

void AutofillExternalDelegate::OnSuggestionsReturned(
    int query_id,
    const std::vector<string16>& values,
    const std::vector<string16>& labels,
    const std::vector<string16>& icons,
    const std::vector<int>& unique_ids) {
  if (query_id != autofill_query_id_)
    return;

  if (values.empty()) {
    // No suggestions, any popup currently showing is obsolete.
    HideAutofillPopup();
    return;
  }

  std::vector<string16> v(values);
  std::vector<string16> l(labels);
  std::vector<string16> i(icons);
  std::vector<int> ids(unique_ids);

  DCHECK_GT(ids.size(), 0U);
  if (!autofill_query_field_.should_autocomplete) {
    // If autofill is disabled and we had suggestions, show a warning instead.
    v.assign(1, l10n_util::GetStringUTF16(IDS_AUTOFILL_WARNING_FORM_DISABLED));
    l.assign(1, string16());
    i.assign(1, string16());
    ids.assign(1, WebAutofillClient::MenuItemIDWarningMessage);
  } else if (ids[0] < 0 && ids.size() > 1) {
    // If we received a warning instead of suggestions from autofill but regular
    // suggestions from autocomplete, don't show the autofill warning.
    v.erase(v.begin());
    l.erase(l.begin());
    i.erase(i.begin());
    ids.erase(ids.begin());
  }

  // If we were about to show a warning and we shouldn't, don't.
  if (ids[0] < 0 && !display_warning_if_disabled_)
    return;

  // Only include "Autofill Options" special menu item if we have Autofill
  // items, identified by |unique_ids| having at least one valid value.
  bool has_autofill_item = false;
  for (size_t i = 0; i < ids.size(); ++i) {
    if (ids[i] > 0) {
      has_autofill_item = true;
      break;
    }
  }

  // The form has been auto-filled, so give the user the chance to clear the
  // form.  Append the 'Clear form' menu item.
  if (has_autofill_item && autofill_query_field_.is_autofilled) {
    v.push_back(l10n_util::GetStringUTF16(IDS_AUTOFILL_CLEAR_FORM_MENU_ITEM));
    l.push_back(string16());
    i.push_back(string16());
    ids.push_back(WebAutofillClient::MenuItemIDClearForm);
  }

  if (has_autofill_item) {
    // Append the 'Chrome Autofill options' menu item;
    v.push_back(l10n_util::GetStringUTF16(IDS_AUTOFILL_OPTIONS_POPUP));
    l.push_back(string16());
    i.push_back(string16());
    ids.push_back(WebAutofillClient::MenuItemIDAutofillOptions);
  }

  // Send to display.
  if (!v.empty() && autofill_query_field_.is_focusable)
    ApplyAutofillSuggestions(v, l, i, ids);

  tab_contents_wrapper_->autofill_manager()->OnDidShowAutofillSuggestions(
      has_autofill_item && !has_shown_autofill_popup_for_current_edit_);
  has_shown_autofill_popup_for_current_edit_ |= has_autofill_item;
}

void AutofillExternalDelegate::OnShowPasswordSuggestions(
    const std::vector<string16>& suggestions,
    const webkit::forms::FormField& field,
    const gfx::Rect& bounds) {
  autofill_query_field_ = field;

  if (suggestions.empty()) {
    HideAutofillPopup();
    return;
  }

  SetBounds(bounds);

  std::vector<string16> empty(suggestions.size());
  std::vector<int> password_ids(suggestions.size(),
                                WebAutofillClient::MenuItemIDPasswordEntry);
  ApplyAutofillSuggestions(suggestions, empty, empty, password_ids);
}

void AutofillExternalDelegate::RemoveAutocompleteEntry(const string16& value) {
  if (tab_contents_wrapper_) {
    tab_contents_wrapper_->autocomplete_history_manager()->
        OnRemoveAutocompleteEntry(autofill_query_field_.name, value);
  }
}

void AutofillExternalDelegate::RemoveAutofillProfileOrCreditCard(
    int unique_id) {
  autofill_manager_->RemoveAutofillProfileOrCreditCard(unique_id);
}


void AutofillExternalDelegate::DidEndTextFieldEditing() {
  HideAutofillPopup();

  has_shown_autofill_popup_for_current_edit_ = false;
}

bool AutofillExternalDelegate::DidAcceptAutofillSuggestions(
    const string16& value,
    int unique_id,
    unsigned index) {
  // If the selected element is a warning we don't want to do anything.
  if (unique_id == WebAutofillClient::MenuItemIDWarningMessage)
    return false;

  if (unique_id == WebAutofillClient::MenuItemIDAutofillOptions) {
    // User selected 'Autofill Options'.
    autofill_manager_->OnShowAutofillDialog();
  } else if (unique_id == WebAutofillClient::MenuItemIDClearForm) {
    // User selected 'Clear form'.
    RenderViewHost* host =
        tab_contents_wrapper_->web_contents()->GetRenderViewHost();
    host->Send(new AutofillMsg_ClearForm(host->GetRoutingID()));
  } else if (unique_id == WebAutofillClient::MenuItemIDPasswordEntry &&
             password_autofill_manager_.DidAcceptAutofillSuggestion(
                 autofill_query_field_, value)) {
    // DidAcceptAutofillSuggestion has already handled the work to fill in
    // the page as required.
  } else if (unique_id == WebAutofillClient::MenuItemIDAutocompleteEntry) {
    // User selected an Autocomplete, so we fill directly.
    RenderViewHost* host =
        tab_contents_wrapper_->web_contents()->GetRenderViewHost();
    host->Send(new AutofillMsg_SetNodeText(
        host->GetRoutingID(),
        value));
  } else {
    FillAutofillFormData(unique_id, false);
  }

  HideAutofillPopup();

  return true;
}

void AutofillExternalDelegate::ClearPreviewedForm() {
  RenderViewHost* host =
      tab_contents_wrapper_->web_contents()->GetRenderViewHost();
  host->Send(new AutofillMsg_ClearPreviewedForm(host->GetRoutingID()));
}

void AutofillExternalDelegate::HideAutofillPopup() {
  HideAutofillPopupInternal();
}

void AutofillExternalDelegate::Reset() {
  HideAutofillPopup();

  password_autofill_manager_.Reset();
}

void AutofillExternalDelegate::AddPasswordFormMapping(
      const webkit::forms::FormField& form,
      const webkit::forms::PasswordFormFillData& fill_data) {
    password_autofill_manager_.AddPasswordFormMapping(form, fill_data);
}

void AutofillExternalDelegate::FillAutofillFormData(int unique_id,
                                                    bool is_preview) {
  RenderViewHost* host =
      tab_contents_wrapper_->web_contents()->GetRenderViewHost();

  if (is_preview) {
    host->Send(new AutofillMsg_SetAutofillActionPreview(
        host->GetRoutingID()));
  } else {
    host->Send(new AutofillMsg_SetAutofillActionFill(
        host->GetRoutingID()));
  }

  // Fill the values for the whole form.
  autofill_manager_->OnFillAutofillFormData(autofill_query_id_,
                                            autofill_query_form_,
                                            autofill_query_field_,
                                            unique_id);
}

// Add a "!defined(OS_YOUROS) for each platform that implements this
// in an autofill_external_delegate_YOUROS.cc.  Currently there are
// none, so all platforms use the default.

#if !defined(OS_ANDROID) && !defined(TOOLKIT_GTK)

AutofillExternalDelegate* AutofillExternalDelegate::Create(
    TabContentsWrapper*, AutofillManager*) {
  return NULL;
}

#endif