/**
* Copyright (c) 2021 Vuplex Inc. All rights reserved.
*
* Licensed under the Vuplex Commercial Software Library License, you may
* not use this file except in compliance with the License. You may obtain
* a copy of the License at
*
*     https://vuplex.com/commercial-library-license
*
* 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.
*/
using System;
using UnityEngine;

namespace Vuplex.WebView
{

    /// <summary>
    /// A 3D, on-screen keyboard that you can hook up to a webview for typing.
    /// You add a Keyboard to your scene by dragging Keyboard.prefab into it
    /// via the editor or by programmatically calling `Keyboard.Instantiate()`.
    /// For use in a `Canvas`, please see `CanvasKeyboard` instead.
    /// </summary>
    /// <remarks>
    /// The Keyboard's UI is a React.js app that runs inside a `WebViewPrefab` instance and
    /// emits messages to the C# to indicate when characters have been pressed.
    /// [The keyboard UI is open source and available on GitHub](https://github.com/vuplex/unity-keyboard).
    /// </remarks>
    /// <example>
    /// // First, create a WebViewPrefab for our main web content.
    /// var webViewPrefab = WebViewPrefab.Instantiate(0.6f, 0.3f);
    /// webViewPrefab.transform.parent = transform;
    /// webViewPrefab.transform.localPosition = new Vector3(0, 0f, 0.4f);
    /// webViewPrefab.transform.LookAt(transform);
    /// webViewPrefab.Initialized += (sender, e) => {
    ///     webViewPrefab.WebView.LoadUrl("https://www.google.com");
    /// };
    /// // Add a Keyboard under the main webview.
    /// var keyboard = Keyboard.Instantiate();
    /// keyboard.transform.parent = webViewPrefab.transform;
    /// keyboard.transform.localPosition = new Vector3(0, -0.31f, 0);
    /// keyboard.transform.localEulerAngles = new Vector3(0, 0, 0);
    /// // Hook up the keyboard so that characters are routed to the main webview.
    /// keyboard.InputReceived += (sender, e) => {
    ///     webViewPrefab.WebView.HandleKeyboardInput(e.Value);
    /// };
    /// </example>
    /// <remarks>
    /// The keyboard supports layouts for the following languages and automatically sets the layout
    /// based on the operating system's default language:
    /// - English
    /// - Spanish
    /// - French
    /// - German
    /// - Russian
    /// - Danish
    /// - Norwegian
    /// - Swedish
    /// </remarks>
    public class Keyboard : BaseKeyboard
    {

        /// <summary>
        /// Sets the keyboard's initial resolution in pixels per Unity unit.
        /// You can change the resolution to make the keyboard's content appear larger or smaller.
        /// For more information on scaling web content, see
        /// [this support article](https://support.vuplex.com/articles/how-to-scale-web-content).
        /// </summary>
        [Label("Initial Resolution (px / Unity unit)")]
        [Tooltip("You can change this to make web content appear larger or smaller.")]
        public float InitialResolution = 1300;

        /// <summary>
        /// The `WebViewPrefab` instance used for the keyboard UI.
        /// </summary>
        public WebViewPrefab WebViewPrefab
        {
            get
            {
                return (WebViewPrefab)_webViewPrefab;
            }
        }

        [Obsolete("Keyboard.Init() has been removed. The Keyboard script now initializes itself automatically, so Init() no longer needs to be called.", true)]
        public void Init(float width, float height) { }

        void _initKeyboard()
        {

            var size = transform.localScale;
            transform.localScale = Vector3.one;
            var webViewPrefab = gameObject.GetComponentInChildren<WebViewPrefab>();
            if (!webViewPrefab) return;
            _webViewPrefab = webViewPrefab;
            webViewPrefab.InitialResolution = InitialResolution;
            _webViewPrefab.transform.SetParent(transform, false);
            _webViewPrefab.gameObject.layer = gameObject.layer;
            // Shift the WebViewPrefab up by half its height so that it's in the same place
            // as the palceholder.
            _webViewPrefab.transform.localPosition = Vector3.zero;
            _webViewPrefab.transform.localEulerAngles = Vector3.zero;
            _init();
            // Disable the placeholder that is used in the editor.
            var placeholder = transform.Find("Placeholder");
            if (placeholder != null)
            {
                placeholder.gameObject.SetActive(false);
            }
        }

        void Start()
        {

            _initKeyboard();
        }

        const float DEFAULT_KEYBOARD_WIDTH = 0.5f;
        const float DEFAULT_KEYBOARD_HEIGHT = 0.125f;
    }
}