// Copyright (c) 2009 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/chromeos/preferences.h"

#include "base/string_util.h"
#include "base/utf_string_conversions.h"
#include "chrome/browser/browser_process.h"
#include "chrome/browser/chromeos/cros/cros_library.h"
#include "chrome/browser/chromeos/cros/keyboard_library.h"
#include "chrome/browser/chromeos/cros/input_method_library.h"
#include "chrome/browser/chromeos/cros/synaptics_library.h"
#include "chrome/browser/chromeos/input_method/input_method_util.h"
#include "chrome/browser/pref_member.h"
#include "chrome/browser/pref_service.h"
#include "chrome/common/notification_service.h"
#include "chrome/common/pref_names.h"
#include "unicode/timezone.h"

namespace chromeos {

static const char kFallbackInputMethodLocale[] = "en-US";

// static
void Preferences::RegisterUserPrefs(PrefService* prefs) {
  prefs->RegisterBooleanPref(prefs::kTapToClickEnabled, false);
  prefs->RegisterBooleanPref(prefs::kLabsMediaplayerEnabled, false);
  prefs->RegisterBooleanPref(prefs::kLabsAdvancedFilesystemEnabled, false);
  prefs->RegisterBooleanPref(prefs::kAccessibilityEnabled, false);
  prefs->RegisterBooleanPref(prefs::kVertEdgeScrollEnabled, false);
  prefs->RegisterIntegerPref(prefs::kTouchpadSpeedFactor, 9);
  prefs->RegisterIntegerPref(prefs::kTouchpadSensitivity, 5);
  prefs->RegisterStringPref(prefs::kLanguageCurrentInputMethod, "");
  prefs->RegisterStringPref(prefs::kLanguagePreviousInputMethod, "");
  prefs->RegisterStringPref(prefs::kLanguageHotkeyNextEngineInMenu,
                            kHotkeyNextEngineInMenu);
  prefs->RegisterStringPref(prefs::kLanguageHotkeyPreviousEngine,
                            kHotkeyPreviousEngine);
  prefs->RegisterStringPref(prefs::kLanguagePreferredLanguages, "");
  prefs->RegisterStringPref(prefs::kLanguagePreloadEngines,
                            kFallbackInputMethodId);  // EN layout
  for (size_t i = 0; i < kNumChewingBooleanPrefs; ++i) {
    prefs->RegisterBooleanPref(kChewingBooleanPrefs[i].pref_name,
                               kChewingBooleanPrefs[i].default_pref_value);
  }
  for (size_t i = 0; i < kNumChewingMultipleChoicePrefs; ++i) {
    prefs->RegisterStringPref(
        kChewingMultipleChoicePrefs[i].pref_name,
        kChewingMultipleChoicePrefs[i].default_pref_value);
  }
  prefs->RegisterIntegerPref(kChewingHsuSelKeyType.pref_name,
                             kChewingHsuSelKeyType.default_pref_value);

  for (size_t i = 0; i < kNumChewingIntegerPrefs; ++i) {
    prefs->RegisterIntegerPref(kChewingIntegerPrefs[i].pref_name,
                               kChewingIntegerPrefs[i].default_pref_value);
  }
  prefs->RegisterStringPref(
      prefs::kLanguageHangulKeyboard,
      kHangulKeyboardNameIDPairs[0].keyboard_id);
  prefs->RegisterStringPref(prefs::kLanguageHangulHanjaKeys, kHangulHanjaKeys);
  for (size_t i = 0; i < kNumPinyinBooleanPrefs; ++i) {
    prefs->RegisterBooleanPref(kPinyinBooleanPrefs[i].pref_name,
                               kPinyinBooleanPrefs[i].default_pref_value);
  }
  for (size_t i = 0; i < kNumPinyinIntegerPrefs; ++i) {
    prefs->RegisterIntegerPref(kPinyinIntegerPrefs[i].pref_name,
                               kPinyinIntegerPrefs[i].default_pref_value);
  }
  prefs->RegisterIntegerPref(kPinyinDoublePinyinSchema.pref_name,
                             kPinyinDoublePinyinSchema.default_pref_value);

  for (size_t i = 0; i < kNumMozcBooleanPrefs; ++i) {
    prefs->RegisterBooleanPref(kMozcBooleanPrefs[i].pref_name,
                               kMozcBooleanPrefs[i].default_pref_value);
  }
  for (size_t i = 0; i < kNumMozcMultipleChoicePrefs; ++i) {
    prefs->RegisterStringPref(
        kMozcMultipleChoicePrefs[i].pref_name,
        kMozcMultipleChoicePrefs[i].default_pref_value);
  }
  for (size_t i = 0; i < kNumMozcIntegerPrefs; ++i) {
    prefs->RegisterIntegerPref(kMozcIntegerPrefs[i].pref_name,
                               kMozcIntegerPrefs[i].default_pref_value);
  }
  prefs->RegisterIntegerPref(
      kXkbModifierMultipleChoicePrefs.pref_name,
      kXkbModifierMultipleChoicePrefs.default_pref_value);
}

void Preferences::Init(PrefService* prefs) {
  tap_to_click_enabled_.Init(prefs::kTapToClickEnabled, prefs, this);
  accessibility_enabled_.Init(prefs::kAccessibilityEnabled, prefs, this);
  vert_edge_scroll_enabled_.Init(prefs::kVertEdgeScrollEnabled, prefs, this);
  speed_factor_.Init(prefs::kTouchpadSpeedFactor, prefs, this);
  sensitivity_.Init(prefs::kTouchpadSensitivity, prefs, this);
  language_hotkey_next_engine_in_menu_.Init(
      prefs::kLanguageHotkeyNextEngineInMenu, prefs, this);
  language_hotkey_previous_engine_.Init(
      prefs::kLanguageHotkeyPreviousEngine, prefs, this);
  language_preferred_languages_.Init(prefs::kLanguagePreferredLanguages,
                                     prefs, this);
  language_preload_engines_.Init(prefs::kLanguagePreloadEngines, prefs, this);
  for (size_t i = 0; i < kNumChewingBooleanPrefs; ++i) {
    language_chewing_boolean_prefs_[i].Init(
        kChewingBooleanPrefs[i].pref_name, prefs, this);
  }
  for (size_t i = 0; i < kNumChewingMultipleChoicePrefs; ++i) {
    language_chewing_multiple_choice_prefs_[i].Init(
        kChewingMultipleChoicePrefs[i].pref_name, prefs, this);
  }
  language_chewing_hsu_sel_key_type_.Init(
      kChewingHsuSelKeyType.pref_name, prefs, this);
  for (size_t i = 0; i < kNumChewingIntegerPrefs; ++i) {
    language_chewing_integer_prefs_[i].Init(
        kChewingIntegerPrefs[i].pref_name, prefs, this);
  }
  language_hangul_keyboard_.Init(prefs::kLanguageHangulKeyboard, prefs, this);
  language_hangul_hanja_keys_.Init(
      prefs::kLanguageHangulHanjaKeys, prefs, this);
  for (size_t i = 0; i < kNumPinyinBooleanPrefs; ++i) {
    language_pinyin_boolean_prefs_[i].Init(
        kPinyinBooleanPrefs[i].pref_name, prefs, this);
  }
  for (size_t i = 0; i < kNumPinyinIntegerPrefs; ++i) {
    language_pinyin_int_prefs_[i].Init(
        kPinyinIntegerPrefs[i].pref_name, prefs, this);
  }
  language_pinyin_double_pinyin_schema_.Init(
      kPinyinDoublePinyinSchema.pref_name, prefs, this);
  for (size_t i = 0; i < kNumMozcBooleanPrefs; ++i) {
    language_mozc_boolean_prefs_[i].Init(
        kMozcBooleanPrefs[i].pref_name, prefs, this);
  }
  for (size_t i = 0; i < kNumMozcMultipleChoicePrefs; ++i) {
    language_mozc_multiple_choice_prefs_[i].Init(
        kMozcMultipleChoicePrefs[i].pref_name, prefs, this);
  }
  for (size_t i = 0; i < kNumMozcIntegerPrefs; ++i) {
    language_mozc_integer_prefs_[i].Init(
        kMozcIntegerPrefs[i].pref_name, prefs, this);
  }
  language_xkb_modifier_remap_.Init(
      kXkbModifierMultipleChoicePrefs.pref_name, prefs, this);

  std::string locale(g_browser_process->GetApplicationLocale());
  // Add input methods based on the application locale when the user first
  // logs in. For instance, if the user chooses Japanese as the UI
  // language at the first login, we'll add input methods associated with
  // Japanese, such as mozc.
  if (locale != kFallbackInputMethodLocale &&
      !prefs->HasPrefPath(prefs::kLanguagePreloadEngines)) {
    std::string preload_engines(language_preload_engines_.GetValue());
    std::vector<std::string> input_method_ids;
    input_method::GetInputMethodIdsFromLanguageCode(
        locale, input_method::kAllInputMethods, &input_method_ids);
    if (!input_method_ids.empty()) {
      if (!preload_engines.empty())
        preload_engines += ',';
      preload_engines += JoinString(input_method_ids, ',');
    }
    language_preload_engines_.SetValue(preload_engines);
  }
  // Add the UI language to the preferred languages the user first logs in.
  if (!prefs->HasPrefPath(prefs::kLanguagePreferredLanguages)) {
    language_preferred_languages_.SetValue(locale);
  }

  // Initialize touchpad settings to what's saved in user preferences.
  NotifyPrefChanged(NULL);
}

void Preferences::Observe(NotificationType type,
                          const NotificationSource& source,
                          const NotificationDetails& details) {
  if (type == NotificationType::PREF_CHANGED)
    NotifyPrefChanged(Details<std::wstring>(details).ptr());
}

void Preferences::NotifyPrefChanged(const std::wstring* pref_name) {
  if (!pref_name || *pref_name == prefs::kTapToClickEnabled) {
    CrosLibrary::Get()->GetSynapticsLibrary()->SetBoolParameter(
        PARAM_BOOL_TAP_TO_CLICK,
        tap_to_click_enabled_.GetValue());
  }
  if (!pref_name || *pref_name == prefs::kVertEdgeScrollEnabled) {
    CrosLibrary::Get()->GetSynapticsLibrary()->SetBoolParameter(
        PARAM_BOOL_VERTICAL_EDGE_SCROLLING,
        vert_edge_scroll_enabled_.GetValue());
  }
  if (!pref_name || *pref_name == prefs::kTouchpadSpeedFactor) {
    CrosLibrary::Get()->GetSynapticsLibrary()->SetRangeParameter(
        PARAM_RANGE_SPEED_SENSITIVITY,
        speed_factor_.GetValue());
  }
  if (!pref_name || *pref_name == prefs::kTouchpadSensitivity) {
    CrosLibrary::Get()->GetSynapticsLibrary()->SetRangeParameter(
          PARAM_RANGE_TOUCH_SENSITIVITY,
          sensitivity_.GetValue());
  }

  // We don't handle prefs::kLanguageCurrentInputMethod and PreviousInputMethod
  // here.

  if (!pref_name || *pref_name == prefs::kLanguageHotkeyNextEngineInMenu) {
    SetLanguageConfigStringListAsCSV(
        kHotKeySectionName,
        kNextEngineInMenuConfigName,
        language_hotkey_next_engine_in_menu_.GetValue());
  }
  if (!pref_name || *pref_name == prefs::kLanguageHotkeyPreviousEngine) {
    SetLanguageConfigStringListAsCSV(
        kHotKeySectionName,
        kPreviousEngineConfigName,
        language_hotkey_previous_engine_.GetValue());
  }
  if (!pref_name || *pref_name == prefs::kLanguagePreferredLanguages) {
    // Unlike kLanguagePreloadEngines and some other input method
    // preferencs, we don't need to send this to ibus-daemon.
  }
  if (!pref_name || *pref_name == prefs::kLanguagePreloadEngines) {
    SetLanguageConfigStringListAsCSV(kGeneralSectionName,
                                     kPreloadEnginesConfigName,
                                     language_preload_engines_.GetValue());
  }
  for (size_t i = 0; i < kNumChewingBooleanPrefs; ++i) {
    if (!pref_name || *pref_name == kChewingBooleanPrefs[i].pref_name) {
      SetLanguageConfigBoolean(kChewingSectionName,
                               kChewingBooleanPrefs[i].ibus_config_name,
                               language_chewing_boolean_prefs_[i].GetValue());
    }
  }
  for (size_t i = 0; i < kNumChewingMultipleChoicePrefs; ++i) {
    if (!pref_name || *pref_name == kChewingMultipleChoicePrefs[i].pref_name) {
      SetLanguageConfigString(
          kChewingSectionName,
          kChewingMultipleChoicePrefs[i].ibus_config_name,
          language_chewing_multiple_choice_prefs_[i].GetValue());
    }
  }
  if (!pref_name || *pref_name == kChewingHsuSelKeyType.pref_name) {
    SetLanguageConfigInteger(
        kChewingSectionName,
        kChewingHsuSelKeyType.ibus_config_name,
        language_chewing_hsu_sel_key_type_.GetValue());
  }
  for (size_t i = 0; i < kNumChewingIntegerPrefs; ++i) {
    if (!pref_name || *pref_name == kChewingIntegerPrefs[i].pref_name) {
      SetLanguageConfigInteger(kChewingSectionName,
                               kChewingIntegerPrefs[i].ibus_config_name,
                               language_chewing_integer_prefs_[i].GetValue());
    }
  }
  if (!pref_name || *pref_name == prefs::kLanguageHangulKeyboard) {
    SetLanguageConfigString(kHangulSectionName, kHangulKeyboardConfigName,
                            language_hangul_keyboard_.GetValue());
  }
  if (!pref_name || *pref_name == prefs::kLanguageHangulHanjaKeys) {
    SetLanguageConfigString(kHangulSectionName, kHangulHanjaKeysConfigName,
                            language_hangul_hanja_keys_.GetValue());
  }
  for (size_t i = 0; i < kNumPinyinBooleanPrefs; ++i) {
    if (!pref_name || *pref_name == kPinyinBooleanPrefs[i].pref_name) {
      SetLanguageConfigBoolean(kPinyinSectionName,
                               kPinyinBooleanPrefs[i].ibus_config_name,
                               language_pinyin_boolean_prefs_[i].GetValue());
    }
  }
  for (size_t i = 0; i < kNumPinyinIntegerPrefs; ++i) {
    if (!pref_name || *pref_name == kPinyinIntegerPrefs[i].pref_name) {
      SetLanguageConfigInteger(kPinyinSectionName,
                               kPinyinIntegerPrefs[i].ibus_config_name,
                               language_pinyin_int_prefs_[i].GetValue());
    }
  }
  if (!pref_name || *pref_name == kPinyinDoublePinyinSchema.pref_name) {
    SetLanguageConfigInteger(
        kPinyinSectionName,
        kPinyinDoublePinyinSchema.ibus_config_name,
        language_pinyin_double_pinyin_schema_.GetValue());
  }
  for (size_t i = 0; i < kNumMozcBooleanPrefs; ++i) {
    if (!pref_name || *pref_name == kMozcBooleanPrefs[i].pref_name) {
      SetLanguageConfigBoolean(kMozcSectionName,
                               kMozcBooleanPrefs[i].ibus_config_name,
                               language_mozc_boolean_prefs_[i].GetValue());
    }
  }
  for (size_t i = 0; i < kNumMozcMultipleChoicePrefs; ++i) {
    if (!pref_name || *pref_name == kMozcMultipleChoicePrefs[i].pref_name) {
      SetLanguageConfigString(
          kMozcSectionName,
          kMozcMultipleChoicePrefs[i].ibus_config_name,
          language_mozc_multiple_choice_prefs_[i].GetValue());
    }
  }
  for (size_t i = 0; i < kNumMozcIntegerPrefs; ++i) {
    if (!pref_name || *pref_name == kMozcIntegerPrefs[i].pref_name) {
      SetLanguageConfigInteger(kMozcSectionName,
                               kMozcIntegerPrefs[i].ibus_config_name,
                               language_mozc_integer_prefs_[i].GetValue());
    }
  }
  if (!pref_name || *pref_name == kXkbModifierMultipleChoicePrefs.pref_name) {
    chromeos::ModifierMap modifier_map;
    const int remap_type = language_xkb_modifier_remap_.GetValue();
    switch (remap_type) {
      default:
        LOG(ERROR) << "Unknown XKB remapping type: " << remap_type;
        /* fall through */
      case kNoRemap:
        modifier_map.push_back(ModifierKeyPair(kSearchKey, kSearchKey));
        modifier_map.push_back(
            ModifierKeyPair(kLeftControlKey, kLeftControlKey));
        modifier_map.push_back(ModifierKeyPair(kLeftAltKey, kLeftAltKey));
        break;
      case kSwapCtrlAndAlt:
        modifier_map.push_back(ModifierKeyPair(kSearchKey, kSearchKey));
        modifier_map.push_back(ModifierKeyPair(kLeftControlKey, kLeftAltKey));
        modifier_map.push_back(ModifierKeyPair(kLeftAltKey, kLeftControlKey));
        break;
      case kSwapSearchAndCtrl:
        modifier_map.push_back(ModifierKeyPair(kSearchKey, kLeftControlKey));
        modifier_map.push_back(ModifierKeyPair(kLeftControlKey, kSearchKey));
        modifier_map.push_back(ModifierKeyPair(kLeftAltKey, kLeftAltKey));
        break;
    }
    CrosLibrary::Get()->GetKeyboardLibrary()->RemapModifierKeys(modifier_map);
  }
}

void Preferences::SetLanguageConfigBoolean(const char* section,
                                           const char* name,
                                           bool value) {
  ImeConfigValue config;
  config.type = ImeConfigValue::kValueTypeBool;
  config.bool_value = value;
  CrosLibrary::Get()->GetInputMethodLibrary()->
      SetImeConfig(section, name, config);
}

void Preferences::SetLanguageConfigInteger(const char* section,
                                           const char* name,
                                           int value) {
  ImeConfigValue config;
  config.type = ImeConfigValue::kValueTypeInt;
  config.int_value = value;
  CrosLibrary::Get()->GetInputMethodLibrary()->
      SetImeConfig(section, name, config);
}

void Preferences::SetLanguageConfigString(const char* section,
                                          const char* name,
                                          const std::string& value) {
  ImeConfigValue config;
  config.type = ImeConfigValue::kValueTypeString;
  config.string_value = value;
  CrosLibrary::Get()->GetInputMethodLibrary()->
      SetImeConfig(section, name, config);
}

void Preferences::SetLanguageConfigStringList(
    const char* section,
    const char* name,
    const std::vector<std::string>& values) {
  ImeConfigValue config;
  config.type = ImeConfigValue::kValueTypeStringList;
  for (size_t i = 0; i < values.size(); ++i)
    config.string_list_value.push_back(values[i]);

  CrosLibrary::Get()->GetInputMethodLibrary()->
      SetImeConfig(section, name, config);
}

void Preferences::SetLanguageConfigStringListAsCSV(const char* section,
                                                   const char* name,
                                                   const std::string& value) {
  LOG(INFO) << "Setting " << name << " to '" << value << "'";

  std::vector<std::string> split_values;
  if (!value.empty())
    SplitString(value, ',', &split_values);

  // We should call the cros API even when |value| is empty, to disable default
  // config.
  SetLanguageConfigStringList(section, name, split_values);
}

}  // namespace chromeos