// Copyright 2017 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#include "cobalt/dom/on_screen_keyboard.h"

#include "base/callback.h"
#include "base/compiler_specific.h"
#include "cobalt/dom/event_target.h"
#include "cobalt/dom/window.h"

namespace cobalt {
namespace dom {

OnScreenKeyboard::OnScreenKeyboard(
    OnScreenKeyboardBridge* bridge,
    script::ScriptValueFactory* script_value_factory)
    : bridge_(bridge),
      script_value_factory_(script_value_factory),
      next_ticket_(0) {
  DCHECK(bridge_) << "OnScreenKeyboardBridge must not be NULL";
}

scoped_ptr<OnScreenKeyboard::VoidPromiseValue> OnScreenKeyboard::Show() {
  scoped_ptr<VoidPromiseValue> promise =
      script_value_factory_->CreateBasicPromise<void>();
  int ticket = next_ticket_++;
  bool is_emplaced =
      ticket_to_show_promise_map_
          .emplace(ticket, std::unique_ptr<VoidPromiseValue::TracedReference>(
                               new VoidPromiseValue::TracedReference(*promise)))
          .second;
  DCHECK(is_emplaced);
  bridge_->Show(data_.c_str(), ticket);
  return promise.Pass();
}

scoped_ptr<OnScreenKeyboard::VoidPromiseValue> OnScreenKeyboard::Hide() {
  scoped_ptr<VoidPromiseValue> promise =
      script_value_factory_->CreateBasicPromise<void>();
  int ticket = next_ticket_++;
  bool is_emplaced =
      ticket_to_hide_promise_map_
          .emplace(ticket, std::unique_ptr<VoidPromiseValue::TracedReference>(
                               new VoidPromiseValue::TracedReference(*promise)))
          .second;
  DCHECK(is_emplaced);
  bridge_->Hide(ticket);
  return promise.Pass();
}

scoped_ptr<OnScreenKeyboard::VoidPromiseValue> OnScreenKeyboard::Focus() {
  scoped_ptr<VoidPromiseValue> promise =
      script_value_factory_->CreateBasicPromise<void>();
  int ticket = next_ticket_++;
  bool is_emplaced =
      ticket_to_focus_promise_map_
          .emplace(ticket, std::unique_ptr<VoidPromiseValue::TracedReference>(
                               new VoidPromiseValue::TracedReference(*promise)))
          .second;
  DCHECK(is_emplaced);
  bridge_->Focus(ticket);
  return promise.Pass();
}

scoped_ptr<OnScreenKeyboard::VoidPromiseValue> OnScreenKeyboard::Blur() {
  scoped_ptr<VoidPromiseValue> promise =
      script_value_factory_->CreateBasicPromise<void>();
  int ticket = next_ticket_++;
  bool is_emplaced =
      ticket_to_blur_promise_map_
          .emplace(ticket, std::unique_ptr<VoidPromiseValue::TracedReference>(
                               new VoidPromiseValue::TracedReference(*promise)))
          .second;
  DCHECK(is_emplaced);
  bridge_->Blur(ticket);
  return promise.Pass();
}

const EventTarget::EventListenerScriptValue* OnScreenKeyboard::onshow() const {
  return GetAttributeEventListener(base::Tokens::show());
}
void OnScreenKeyboard::set_onshow(
    const EventListenerScriptValue& event_listener) {
  SetAttributeEventListener(base::Tokens::show(), event_listener);
}

const EventTarget::EventListenerScriptValue* OnScreenKeyboard::onfocus() const {
  return GetAttributeEventListener(base::Tokens::focus());
}
void OnScreenKeyboard::set_onfocus(
    const EventListenerScriptValue& event_listener) {
  SetAttributeEventListener(base::Tokens::focus(), event_listener);
}

const EventTarget::EventListenerScriptValue* OnScreenKeyboard::onblur() const {
  return GetAttributeEventListener(base::Tokens::blur());
}
void OnScreenKeyboard::set_onblur(
    const EventListenerScriptValue& event_listener) {
  SetAttributeEventListener(base::Tokens::blur(), event_listener);
}

const EventTarget::EventListenerScriptValue* OnScreenKeyboard::onhide() const {
  return GetAttributeEventListener(base::Tokens::hide());
}
void OnScreenKeyboard::set_onhide(
    const EventListenerScriptValue& event_listener) {
  SetAttributeEventListener(base::Tokens::hide(), event_listener);
}

const EventTarget::EventListenerScriptValue* OnScreenKeyboard::oninput() const {
  return GetAttributeEventListener(base::Tokens::input());
}

void OnScreenKeyboard::set_oninput(
    const EventListenerScriptValue& event_listener) {
  SetAttributeEventListener(base::Tokens::input(), event_listener);
}

bool OnScreenKeyboard::shown() const { return bridge_->IsShown(); }

void OnScreenKeyboard::set_keep_focus(bool keep_focus) {
  keep_focus_ = keep_focus;
  bridge_->SetKeepFocus(keep_focus);
}

void OnScreenKeyboard::DispatchHideEvent(int ticket) {
  if (bridge_->IsValidTicket(ticket)) {
    TicketToPromiseMap::const_iterator it =
        ticket_to_hide_promise_map_.find(ticket);
    if (it == ticket_to_hide_promise_map_.end()) {
      LOG(ERROR)
          << "No promise matching ticket for OnScreenKeyboardHidden event.";
      return;
    }
    it->second->value().Resolve();
    ticket_to_hide_promise_map_.erase(it);
  }
  DispatchEvent(new dom::Event(base::Tokens::hide()));
}

void OnScreenKeyboard::DispatchShowEvent(int ticket) {
  if (bridge_->IsValidTicket(ticket)) {
    TicketToPromiseMap::const_iterator it =
        ticket_to_show_promise_map_.find(ticket);
    if (it == ticket_to_show_promise_map_.end()) {
      LOG(ERROR)
          << "No promise matching ticket for OnScreenKeyboardShown event.";
      return;
    }
    it->second->value().Resolve();
    ticket_to_show_promise_map_.erase(it);
  }
  DispatchEvent(new dom::Event(base::Tokens::show()));
}

void OnScreenKeyboard::DispatchFocusEvent(int ticket) {
  if (bridge_->IsValidTicket(ticket)) {
    TicketToPromiseMap::const_iterator it =
        ticket_to_focus_promise_map_.find(ticket);
    if (it == ticket_to_focus_promise_map_.end()) {
      LOG(ERROR)
          << "No promise matching ticket for OnScreenKeyboardFocused event.";
      return;
    }
    it->second->value().Resolve();
    ticket_to_focus_promise_map_.erase(it);
  }
  DispatchEvent(new dom::Event(base::Tokens::focus()));
}

void OnScreenKeyboard::DispatchBlurEvent(int ticket) {
  if (bridge_->IsValidTicket(ticket)) {
    TicketToPromiseMap::const_iterator it =
        ticket_to_blur_promise_map_.find(ticket);
    if (it == ticket_to_blur_promise_map_.end()) {
      LOG(ERROR)
          << "No promise matching ticket for OnScreenKeyboardBlurred event.";
      return;
    }
    it->second->value().Resolve();
    ticket_to_blur_promise_map_.erase(it);
  }
  DispatchEvent(new dom::Event(base::Tokens::blur()));
}

void OnScreenKeyboard::TraceMembers(script::Tracer* tracer) {
  EventTarget::TraceMembers(tracer);

  tracer->TraceValues(ticket_to_hide_promise_map_);
  tracer->TraceValues(ticket_to_show_promise_map_);
  tracer->TraceValues(ticket_to_focus_promise_map_);
  tracer->TraceValues(ticket_to_blur_promise_map_);
}

}  // namespace dom
}  // namespace cobalt