/*
 * 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;

namespace ElmSharp.Wearable
{
    /// <summary>
    /// The Circle GenList Selector is a widget to display and handle genlist items by rotary event
    /// Inherits <see cref="GenList"/>
    /// </summary>
    public class CircleGenList : GenList
    {
        IntPtr circleHandle;

        /// <summary>
        /// Creates and initializes a new instance of the Circle GenList class
        /// </summary>
        /// <param name="parent">The parent of new Circle GenList instance</param>
        public CircleGenList(EvasObject parent) : base(parent) { }

        /// <summary>
        /// Sets or gets the disabled state of the Circle GenList Selector
        /// </summary>
        public bool Disabled
        {
            get
            {
                return Interop.Eext.eext_circle_object_disabled_get(circleHandle);
            }
            set
            {
                Interop.Eext.eext_circle_object_disabled_set(circleHandle, value);
            }
        }

        /// <summary>
        /// Sets or gets the color of the scroll background
        /// </summary>
        public Color VerticalScrollBackgroundColor
        {
            get
            {
                int r, g, b, a;
                Interop.Eext.eext_circle_object_item_color_get(circleHandle, "vertical,scroll,bg", out r, out g, out b, out a);
                return new Color(r, g, b, a);
            }
            set
            {
                Interop.Eext.eext_circle_object_item_color_set(circleHandle, "vertical,scroll,bg", value.R, value.G, value.B, value.A);
            }
        }

        /// <summary>
        /// Sets or gets the line width of the scroll background
        /// </summary>
        public int VerticalScrollBackgroundLineWidth
        {
            get
            {
                return Interop.Eext.eext_circle_object_item_line_width_get(circleHandle, "vertical,scroll,bg");
            }
            set
            {
                Interop.Eext.eext_circle_object_item_line_width_set(circleHandle, "vertical,scroll,bg", value);
            }
        }

        /// <summary>
        /// Sets or gets the redius of the scroll background
        /// </summary>
        public double VerticalScrollBackgroundRadius
        {
            get
            {
                return Interop.Eext.eext_circle_object_item_radius_get(circleHandle, "vertical,scroll,bg");
            }
            set
            {
                Interop.Eext.eext_circle_object_item_radius_set(circleHandle, "vertical,scroll,bg", value);
            }
        }

        /// <summary>
        /// Sets or gets the color of the scroll bar
        /// </summary>
        public Color VerticalScrollBarColor
        {
            get
            {
                int r, g, b, a;
                Interop.Eext.eext_circle_object_item_color_get(circleHandle, "default", out r, out g, out b, out a);
                return new Color(r, g, b, a);
            }
            set
            {
                Interop.Eext.eext_circle_object_item_color_set(circleHandle, "default", value.R, value.G, value.B, value.A);
            }
        }

        /// <summary>
        /// Sets or gets the line width of the scroll bar
        /// </summary>
        public int VerticalScrollBarLineWidth
        {
            get
            {
                return Interop.Eext.eext_circle_object_item_line_width_get(circleHandle, "default");
            }
            set
            {
                Interop.Eext.eext_circle_object_item_line_width_set(circleHandle, "default", value);
            }
        }

        /// <summary>
        /// Sets or gets the redius of the scroll bar
        /// </summary>
        public double VerticalScrollBarRadius
        {
            get
            {
                return Interop.Eext.eext_circle_object_item_radius_get(circleHandle, "default");
            }
            set
            {
                Interop.Eext.eext_circle_object_item_radius_set(circleHandle, "default", value);
            }
        }

        /// <summary>
        /// Sets or gets the policy if the scroll bar is visible
        /// </summary>
        /// <remarks>
        /// ScrollBarVisiblePolicy.Auto means the vertical scrollbar is made visible if it is needed, and otherwise kept hidden.
        /// ScrollBarVisiblePolicy.Visible turns it on all the time, and ScrollBarVisiblePolicy.Invisible always keeps it off.
        /// </remarks>
        public ScrollBarVisiblePolicy VerticalScrollBarVisiblePolicy
        {
            get
            {
                int policy;
                Interop.Eext.eext_circle_object_genlist_scroller_policy_get(circleHandle, IntPtr.Zero, out policy);
                return (ScrollBarVisiblePolicy)policy;
            }
            set
            {
                int h;
                Interop.Eext.eext_circle_object_genlist_scroller_policy_get(circleHandle, out h, IntPtr.Zero);
                Interop.Eext.eext_circle_object_genlist_scroller_policy_set(circleHandle, (int)h, (int)value);
            }
        }

        /// <summary>
        /// Creates a widget handle.
        /// </summary>
        /// <param name="parent">Parent EvasObject</param>
        /// <returns>Handle IntPtr</returns>
        protected override IntPtr CreateHandle(EvasObject parent)
        {
            var handle = base.CreateHandle(parent);

            IntPtr surface = IntPtr.Zero;

            if (parent is Conformant)
            {
                surface = Interop.Eext.eext_circle_surface_conformant_add(parent);
            }
            else if (parent is Naviframe)
            {
                surface = Interop.Eext.eext_circle_surface_naviframe_add(parent.RealHandle);
            }
            else if (parent is Layout)
            {
                surface = Interop.Eext.eext_circle_surface_layout_add(parent);
            }

            circleHandle = Interop.Eext.eext_circle_object_genlist_add(RealHandle, surface);
            if (surface == IntPtr.Zero)
            {
                EvasObject p = parent;
                while(!(p is Window))
                {
                    p = p.Parent;
                }
                var w = (p as Window).ScreenSize.Width;
                var h = (p as Window).ScreenSize.Height;
                Interop.Evas.evas_object_resize(circleHandle, w, h);
            }

            Interop.Eext.eext_rotary_object_event_activated_set(circleHandle, true);

            return handle;
        }
    }
}