using System;
using System.Collections.Generic;
using System.Text;
using System.Windows.Forms;
using System.ComponentModel;
using FastReport.Utils;
using System.Drawing;

namespace FastReport.Dialog
{
    /// <summary>
    /// Represents a Windows list view control, which displays a collection of items that can be displayed using one of four different views.
    /// Wraps the <see cref="System.Windows.Forms.ListView"/> control.
    /// </summary>
    public partial class ListViewControl : DialogControl
    {
        private ListView listView;
        private string itemCheckedEvent;
        private string selectedIndexChangedEvent;

        #region Properties
        /// <summary>
        /// Occurs when the checked state of an item changes.
        /// Wraps the <see cref="System.Windows.Forms.ListView.ItemChecked"/> event.
        /// </summary>
        public event ItemCheckedEventHandler ItemChecked;

        /// <summary>
        /// Occurs when the index of the selected item in the list view control changes.
        /// Wraps the <see cref="System.Windows.Forms.ListView.SelectedIndexChanged"/> event.
        /// </summary>
        public event EventHandler SelectedIndexChanged;

        /// <summary>
        /// Gets an internal <b>ListView</b>.
        /// </summary>
        [Browsable(false)]
        public ListView ListView
        {
            get { return listView; }
        }

        /// <summary>
        /// Gets or sets a value indicating whether a check box appears next to each item in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.CheckBoxes"/> property.
        /// </summary>
        [DefaultValue(false)]
        [Category("Appearance")]
        public bool CheckBoxes
        {
            get { return ListView.CheckBoxes; }
            set { ListView.CheckBoxes = value; }
        }

        /// <summary>
        /// Gets or sets a value indicating whether multiple items can be selected.
        /// Wraps the <see cref="System.Windows.Forms.ListView.MultiSelect"/> property.
        /// </summary>
        [DefaultValue(true)]
        [Category("Behavior")]
        public bool MultiSelect
        {
            get { return ListView.MultiSelect; }
            set { ListView.MultiSelect = value; }
        }

        /// <summary>
        /// Gets or sets a value indicating whether items are displayed in groups.
        /// Wraps the <see cref="System.Windows.Forms.ListView.ShowGroups"/> property.
        /// </summary>
        [DefaultValue(true)]
        [Category("Behavior")]
        public bool ShowGroups
        {
            get { return ListView.ShowGroups; }
            set { ListView.ShowGroups = value; }
        }

        /// <summary>
        /// Gets or sets how items are displayed in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.View"/> property.
        /// </summary>
        [DefaultValue(View.LargeIcon)]
        [Category("Appearance")]
        public View View
        {
            get { return ListView.View; }
            set { ListView.View = value; }
        }

        /// <summary>
        /// Gets or sets a script method name that will be used to handle the 
        /// <see cref="ItemChecked"/> event.
        /// </summary>
        [Category("Events")]
        public string ItemCheckedEvent
        {
            get { return itemCheckedEvent; }
            set { itemCheckedEvent = value; }
        }

        /// <summary>
        /// Gets or sets a script method name that will be used to handle the 
        /// <see cref="SelectedIndexChanged"/> event.
        /// </summary>
        [Category("Events")]
        public string SelectedIndexChangedEvent
        {
            get { return selectedIndexChangedEvent; }
            set { selectedIndexChangedEvent = value; }
        }

        /// <summary>
        /// Gets the indexes of the currently checked items in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.CheckedIndices"/> property.
        /// </summary>
        [Browsable(false)]
        public ListView.CheckedIndexCollection CheckedIndices
        {
            get { return ListView.CheckedIndices; }
        }

        /// <summary>
        /// Gets the currently checked items in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.CheckedItems"/> property.
        /// </summary>
        [Browsable(false)]
        public ListView.CheckedListViewItemCollection CheckedItems
        {
            get { return ListView.CheckedItems; }
        }

        /// <summary>
        /// Gets the collection of all column headers that appear in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.Columns"/> property.
        /// </summary>
        [Browsable(false)]
        public ListView.ColumnHeaderCollection Columns
        {
            get { return ListView.Columns; }
        }

        /// <summary>
        /// Gets the collection of ListViewGroup objects assigned to the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.Groups"/> property.
        /// </summary>
        [Browsable(false)]
        public ListViewGroupCollection Groups
        {
            get { return ListView.Groups; }
        }

        /// <summary>
        /// Gets a collection containing all items in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.Items"/> property.
        /// </summary>
        [Browsable(false)]
        public ListView.ListViewItemCollection Items
        {
            get { return ListView.Items; }
        }

        /// <summary>
        /// Gets or sets the ImageList to use when displaying items as large icons in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.LargeImageList"/> property.
        /// </summary>
        [Browsable(false)]
        public ImageList LargeImageList
        {
            get { return ListView.LargeImageList; }
            set { ListView.LargeImageList = value; }
        }

        /// <summary>
        /// Gets the indexes of the selected items in the control. 
        /// Wraps the <see cref="System.Windows.Forms.ListView.SelectedIndices"/> property.
        /// </summary>
        [Browsable(false)]
        public ListView.SelectedIndexCollection SelectedIndices
        {
            get { return ListView.SelectedIndices; }
        }

        /// <summary>
        /// Gets the items that are selected in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.SelectedItems"/> property.
        /// </summary>
        [Browsable(false)]
        public ListView.SelectedListViewItemCollection SelectedItems
        {
            get { return ListView.SelectedItems; }
        }

        /// <summary>
        /// Gets or sets the ImageList to use when displaying items as small icons in the control.
        /// Wraps the <see cref="System.Windows.Forms.ListView.SmallImageList"/> property.
        /// </summary>
        [Browsable(false)]
        public ImageList SmallImageList
        {
            get { return ListView.SmallImageList; }
            set { ListView.SmallImageList = value; }
        }
        #endregion

        #region Private Methods
        private void ListView_ItemChecked(object sender, ItemCheckedEventArgs e)
        {
            OnItemChecked(e);
        }

        private void ListView_SelectedIndexChanged(object sender, EventArgs e)
        {
            OnSelectedIndexChanged(e);
        }
        #endregion

        #region Protected Methods
        /// <inheritdoc/>
        protected override void AttachEvents()
        {
            base.AttachEvents();
            ListView.ItemChecked += new ItemCheckedEventHandler(ListView_ItemChecked);
            ListView.SelectedIndexChanged += new EventHandler(ListView_SelectedIndexChanged);
        }

        /// <inheritdoc/>
        protected override void DetachEvents()
        {
            base.DetachEvents();
            ListView.ItemChecked -= new ItemCheckedEventHandler(ListView_ItemChecked);
            ListView.SelectedIndexChanged -= new EventHandler(ListView_SelectedIndexChanged);
        }
        #endregion

        #region Public Methods
        /// <inheritdoc/>
        public override void Serialize(FRWriter writer)
        {
            ListViewControl c = writer.DiffObject as ListViewControl;
            base.Serialize(writer);

            if (CheckBoxes != c.CheckBoxes)
                writer.WriteBool("CheckBoxes", CheckBoxes);
            if (MultiSelect != c.MultiSelect)
                writer.WriteBool("MultiSelect", MultiSelect);
            if (ShowGroups != c.ShowGroups)
                writer.WriteBool("ShowGroups", ShowGroups);
            if (View != c.View)
                writer.WriteValue("View", View);
        }

        /// <summary>
        /// This method fires the <b>ItemChecked</b> event and the script code connected to the <b>ItemCheckedEvent</b>.
        /// </summary>
        /// <param name="e">Event data.</param>
        public virtual void OnItemChecked(ItemCheckedEventArgs e)
        {
            if (ItemChecked != null)
                ItemChecked(this, e);
            InvokeEvent(ItemCheckedEvent, e);
        }

        /// <summary>
        /// This method fires the <b>SelectedIndexChanged</b> event and the script code connected to the <b>SelectedIndexChangedEvent</b>.
        /// </summary>
        /// <param name="e">Event data.</param>
        public virtual void OnSelectedIndexChanged(EventArgs e)
        {
            if (SelectedIndexChanged != null)
                SelectedIndexChanged(this, e);
            InvokeEvent(SelectedIndexChangedEvent, e);
        }
        #endregion

        /// <summary>
        /// Initializes a new instance of the <b>ListViewControl</b> class with default settings. 
        /// </summary>
        public ListViewControl()
        {
            listView = new ListView();
            Control = listView;
            ListView.HideSelection = false;
        }
    }
}