// 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.

namespace GoogleVR.KeyboardDemo {
  using UnityEngine;
  using UnityEngine.UI;
  using System;

  public class KeyboardDelegateExample : GvrKeyboardDelegateBase {

    public Text KeyboardText;
    public Canvas UpdateCanvas;

    public override event EventHandler KeyboardHidden;
    public override event EventHandler KeyboardShown;

    private const string DD_KEYBOARD_NOT_INSTALLED_MSG = "Please update the Daydream Keyboard app from the Play Store.";

    void Awake() {
      if (UpdateCanvas != null) {
        UpdateCanvas.gameObject.SetActive(false);
      }
    }

    public override void OnKeyboardShow() {
      Debug.Log("Calling Keyboard Show Delegate!");
      EventHandler handler = KeyboardShown;
      if (handler != null) {
        handler(this, null);
      }
    }

    public override void OnKeyboardHide() {
      Debug.Log("Calling Keyboard Hide Delegate!");
      EventHandler handler = KeyboardHidden;
      if (handler != null) {
        handler(this, null);
      }
    }

    public override void OnKeyboardUpdate(string text) {
      if (KeyboardText != null) {
        KeyboardText.text = text;
      } else {
        Debug.Log("Keyboard text is null....");
      }
    }

    public override void OnKeyboardEnterPressed(string text) {
      Debug.Log("Calling Keyboard Enter Pressed Delegate: " + text);
    }

    public override void OnKeyboardError(GvrKeyboardError errCode) {
      Debug.Log("Calling Keyboard Error Delegate: ");
      switch(errCode) {
        case GvrKeyboardError.UNKNOWN:
          Debug.Log("Unknown Error");
          break;
        case GvrKeyboardError.SERVICE_NOT_CONNECTED:
          Debug.Log("Service not connected");
          break;
        case GvrKeyboardError.NO_LOCALES_FOUND:
          Debug.Log("No locales found");
          break;
        case GvrKeyboardError.SDK_LOAD_FAILED:
          Debug.LogWarning(DD_KEYBOARD_NOT_INSTALLED_MSG);
          if (KeyboardText != null) {
            KeyboardText.text = DD_KEYBOARD_NOT_INSTALLED_MSG;
          }
          if (UpdateCanvas != null) {
            UpdateCanvas.gameObject.SetActive(true);
          }
          break;
      }
    }

    public void LaunchPlayStore() {
      if (UpdateCanvas != null) {
        UpdateCanvas.gameObject.SetActive(false);
#if !UNITY_ANDROID
        Debug.LogError("GVR Keyboard available only on Android.");
#else
        GvrKeyboardIntent.Instance.LaunchPlayStore();
#endif  // !UNITY_ANDROID
      }
    }
  }
}