/*
 * Copyright (c) 2016 Samsung Electronics Co., Ltd 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.
 */

using System;
using System.Collections.Generic;

namespace ElmSharp
{
    /// <summary>
    /// The Index widget gives you an index for fast access to whichever group of the other UI items one might have.
    /// Inherits Layout.
    /// </summary>
    /// <since_tizen> preview </since_tizen>
    [Obsolete("This has been deprecated in API12")]
    public class Index : Layout
    {
        HashSet<IndexItem> _children = new HashSet<IndexItem>();
        SmartEvent _delayedChanged;

        /// <summary>
        /// Creates and initializes a new instance of the Index class.
        /// </summary>
        /// <param name="parent">The parent is a given container, which will be attached by Index as a child. It's <see cref="EvasObject"/> type.</param>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public Index(EvasObject parent) : base(parent)
        {
            _delayedChanged = new SmartEvent(this, this.RealHandle, "delay,changed");
            _delayedChanged.On += _delayedChanged_On;
        }

        /// <summary>
        /// Changed will be triggered when the selected index item is changed.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public event EventHandler Changed;

        /// <summary>
        /// Sets or gets whether the auto hiding feature is enabled or not for a given index widget.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public bool AutoHide
        {
            get
            {
                return !Interop.Elementary.elm_index_autohide_disabled_get(RealHandle);
            }
            set
            {
                Interop.Elementary.elm_index_autohide_disabled_set(RealHandle, !value);
            }
        }

        /// <summary>
        /// Sets or gets a value whether the horizontal mode is enabled or not.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public bool IsHorizontal
        {
            get
            {
                return Interop.Elementary.elm_index_horizontal_get(RealHandle);
            }
            set
            {
                Interop.Elementary.elm_index_horizontal_set(RealHandle, value);
            }
        }

        /// <summary>
        /// Sets or gets a value of the indicator's disabled status.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public bool IndicatorVisible
        {
            get
            {
                return !Interop.Elementary.elm_index_indicator_disabled_get(RealHandle);
            }
            set
            {
                Interop.Elementary.elm_index_indicator_disabled_set(RealHandle, !value);
            }
        }

        /// <summary>
        /// Sets or gets whether the omit feature is enabled or not for a given index widget.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public bool OmitEnabled
        {
            get
            {
                return Interop.Elementary.elm_index_omit_enabled_get(RealHandle);
            }
            set
            {
                Interop.Elementary.elm_index_omit_enabled_set(RealHandle, value);
            }
        }

        /// <summary>
        /// Sets a delay change time for the index object.
        /// The delay time is 0.2 seconds by default.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public double Delay
        {
            get
            {
                return Interop.Elementary.elm_index_delay_change_time_get(RealHandle);
            }
            set
            {
                Interop.Elementary.elm_index_delay_change_time_set(RealHandle, value);
            }
        }

        /// <summary>
        /// Gets or sets the items level for a given index widget.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public int Level
        {
            get
            {
                return Interop.Elementary.elm_index_item_level_get(RealHandle);
            }
            set
            {
                Interop.Elementary.elm_index_item_level_set(RealHandle, value);
            }
        }

        /// <summary>
        /// Controls the standard_priority group of the index.
        /// Priority group will be shown as many items as it can, and other group will be shown for one character only.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public int Priority
        {
            get
            {
                return Interop.Elementary.elm_index_standard_priority_get(RealHandle);
            }
            set
            {
                Interop.Elementary.elm_index_standard_priority_set(RealHandle, value);
            }
        }

        /// <summary>
        /// Gets the last selected item for a given index widget.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public IndexItem SelectedItem
        {
            get
            {
                IntPtr handle = Interop.Elementary.elm_index_selected_item_get(RealHandle, 0);
                return ItemObject.GetItemByHandle(handle) as IndexItem;
            }
        }

        /// <summary>
        /// Appends a new item on a given index widget.
        /// </summary>
        /// <param name="label">The label for which the item should be indexed.</param>
        /// <returns>An object to the IndexItem if added, or null on errors.</returns>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public IndexItem Append(string label)
        {
            IndexItem item = new IndexItem(label, this);
            item.Handle = Interop.Elementary.elm_index_item_append(RealHandle, label, null, (IntPtr)item.Id);
            return item;
        }

        /// <summary>
        /// Prepends a new item on a given index widget.
        /// </summary>
        /// <param name="label">The label for which the item should be indexed.</param>
        /// <returns>A handle to the item if added, or null on errors.</returns>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public IndexItem Prepend(string label)
        {
            IndexItem item = new IndexItem(label, this);
            item.Handle = Interop.Elementary.elm_index_item_prepend(RealHandle, label, null, (IntPtr)item.Id);
            return item;
        }

        /// <summary>
        /// Inserts a new item into the index object before the item before.
        /// </summary>
        /// <param name="label">The label for which the item should be indexed.</param>
        /// <param name="before">The index item to insert after.</param>
        /// <returns>An object to the IndexItem if added, or null on errors.</returns>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public IndexItem InsertBefore(string label, IndexItem before)
        {
            IndexItem item = new IndexItem(label, this);
            item.Handle = Interop.Elementary.elm_index_item_insert_before(RealHandle, before, label, null, (IntPtr)item.Id);
            return item;
        }

        /// <summary>
        /// Inserts a new item into the index object after the item after.
        /// </summary>
        /// <param name="label">The label for which the item should be indexed.</param>
        /// <param name="after">The index item to insert after.</param>
        /// <returns>An object to the IndexItem if added, or null on errors.</returns>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public IndexItem InsertAfter(string label, IndexItem after)
        {
            IndexItem item = new IndexItem(label, this);
            item.Handle = Interop.Elementary.elm_index_item_insert_after(RealHandle, after, label, null, (IntPtr)item.Id);
            return item;
        }

        /// <summary>
        /// Flushes the changes made to the index items so that they work correctly.
        /// </summary>
        /// <param name="level">The index level (one of 0 or 1) where the changes were made.</param>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public void Update(int level)
        {
            Interop.Elementary.elm_index_level_go(RealHandle, level);
        }

        /// <summary>
        /// Removes all the items from a given index widget.
        /// </summary>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        public void Clear()
        {
            Interop.Elementary.elm_index_item_clear(RealHandle);
        }

        /// <summary>
        /// Creates a widget handle.
        /// </summary>
        /// <param name="parent">Parent EvasObject.</param>
        /// <returns>Handle IntPtr.</returns>
        /// <since_tizen> preview </since_tizen>
        [Obsolete("This has been deprecated in API12")]
        protected override IntPtr CreateHandle(EvasObject parent)
        {
            IntPtr handle = Interop.Elementary.elm_layout_add(parent.Handle);
            Interop.Elementary.elm_layout_theme_set(handle, "layout", "elm_widget", "default");

            RealHandle = Interop.Elementary.elm_index_add(handle);
            Interop.Elementary.elm_object_part_content_set(handle, "elm.swallow.content", RealHandle);

            return handle;
        }

        void _delayedChanged_On(object sender, EventArgs e)
        {
            SelectedItem?.SendSelected();
            Changed?.Invoke(this, e);
        }
    }
}