using System;
using System.Windows.Forms;
using System.Drawing;
using System.ComponentModel;
using FastReport.Forms;
using FastReport.Utils;
using FastReport.Controls;

namespace FastReport.Design.StandardDesigner
{
    /// <summary>
    /// Represents the designer's statusbar.
    /// </summary>
    [ToolboxItem(false)]
    public class DesignerStatusBar : StatusStrip, IDesignerPlugin
    {
        #region Fields
        private Designer FDesigner;
        private ToolStripStatusLabel lblLocationRightBot;
        private ToolStripStatusLabel lblLocation;
        private ToolStripStatusLabel lblSize;
        private ToolStripStatusLabel lblText;
        private ToolStripZoomControl zoomControl;
        private bool updatingZoom;
        #endregion

        #region Properties
        private Designer Designer
        {
            get { return FDesigner; }
        }
        #endregion

        #region IDesignerPlugin
        /// <inheritdoc/>
        public string PluginName
        {
            get { return Name; }
        }

        /// <inheritdoc/>
        public void SaveState()
        {
        }
        /// <inheritdoc/>
        public void ReinitDpiSize()
        {
        }

        /// <inheritdoc/>
        public void RestoreState()
        {
        }

        /// <inheritdoc/>
        public void SelectionChanged()
        {
            UpdateContent();
        }

        /// <inheritdoc/>
        public void UpdateContent()
        {
            UpdateZoom();
        }

        /// <inheritdoc/>
        public void Lock()
        {
        }

        /// <inheritdoc/>
        public void Unlock()
        {
            UpdateContent();
        }

        /// <inheritdoc/>
        public void Localize()
        {
            UpdateContent();
        }

        /// <inheritdoc/>
        public DesignerOptionsPage GetOptionsPage()
        {
            return null;
        }

        /// <inheritdoc/>
        public void UpdateUIStyle()
        {
            Renderer = UIStyleUtils.GetToolStripRenderer(Designer.UIStyle);
            zoomControl.UIStyle = Designer.UIStyle;
        }

        private Image Rotate180(Image original)
        {
            var bitmap = new Bitmap(original.Width, original.Height);
            using (var g = Graphics.FromImage(bitmap))
            {
                g.TranslateTransform(bitmap.Width / 2, bitmap.Height / 2);
                g.RotateTransform(180);
                g.DrawImage(original, -bitmap.Width / 2, -bitmap.Height / 2);
            }
            return bitmap;
        }

        /// <inheritdoc/>
        public void UpdateDpiDependencies()
        {
            Font = Designer.LogicalToDevice(DrawUtils.DefaultFont);
            Height = Designer.LogicalToDevice(26);
            Padding = new Padding(6, 0, 0, 0);

            lblLocation.Size = Designer.LogicalToDevice(new Size(140, 26));
            lblLocationRightBot.Size = lblLocation.Size;
            lblSize.Size = lblLocation.Size;

            lblLocation.Image = Designer.GetImage(62);
            lblLocationRightBot.Image = Rotate180(Designer.GetImage(62));
            lblSize.Image = Designer.GetImage(63);

            zoomControl.Size = Designer.LogicalToDevice(new Size(280, 26));
        }
        #endregion

        #region Private Methods
        private void UpdateZoom()
        {
            updatingZoom = true;
            zoomControl.ZoomValue = Designer.Zoom;
            updatingZoom = false;
        }

        private void btnZoomPageWidth_Click(object sender, EventArgs e)
        {
            Designer.ZoomPageWidth();
        }

        private void btnZoomWholePage_Click(object sender, EventArgs e)
        {
            Designer.ZoomWholePage();
        }

        private void btnZoom100_Click(object sender, EventArgs e)
        {
            Designer.Zoom = 1;
        }

        private void slider_ValueChanged(object sender, EventArgs e)
        {
            if (updatingZoom)
                return;

            Designer.Zoom = zoomControl.ZoomValue;
        }
        #endregion

        #region Public Methods
        /// <summary>
        /// Updates the information about location and size.
        /// </summary>
        /// <param name="location">The location.</param>
        /// <param name="size">The size.</param>
        ///  <param name="locationRightBot">The location of right bottom angle.</param>
        public void UpdateLocationAndSize(string location, string size, string locationRightBot)
        {
            lblLocation.Visible = !String.IsNullOrEmpty(location);
            lblLocation.Text = location;
            lblSize.Visible = !String.IsNullOrEmpty(size);
            lblSize.Text = size;
            lblLocationRightBot.Visible = !String.IsNullOrEmpty(locationRightBot);
            lblLocationRightBot.Text = locationRightBot;
        }

        /// <summary>
        /// Updates the name and text information.
        /// </summary>
        /// <param name="s">The text.</param>
        public void UpdateText(string s)
        {
            SelectedObjectCollection selection = FDesigner.SelectedObjects;
            string text = selection.Count == 0 ? "" : selection.Count > 1 ?
                String.Format(Res.Get("Designer,ToolWindow,Properties,NObjectsSelected"), selection.Count) :
                selection[0].Name;
            if (!String.IsNullOrEmpty(s))
                text += ":  " + s.Replace('\r', ' ').Replace('\n', ' ');

            lblText.Text = text;
        }
        #endregion

        /// <summary>
        /// Initializes a new instance of the <see cref="DesignerStatusBar"/> class with default settings.
        /// </summary>
        /// <param name="designer">The report designer.</param>
        public DesignerStatusBar(Designer designer) : base()
        {
            Name = "StatusBar";
            FDesigner = designer;
            AutoSize = false;
            SizingGrip = false;

            lblLocation = new ToolStripStatusLabel();
            lblLocation.AutoSize = false;
            lblLocation.TextAlign = ContentAlignment.MiddleLeft;
            lblLocation.ImageAlign = ContentAlignment.MiddleLeft;

            lblLocationRightBot = new ToolStripStatusLabel();
            lblLocationRightBot.AutoSize = false;
            lblLocationRightBot.TextAlign = ContentAlignment.MiddleLeft;
            lblLocationRightBot.ImageAlign = ContentAlignment.MiddleLeft;

            lblSize = new ToolStripStatusLabel();
            lblSize.AutoSize = false;
            lblSize.TextAlign = ContentAlignment.MiddleLeft;
            lblSize.ImageAlign = ContentAlignment.MiddleLeft;

            lblText = new ToolStripStatusLabel();
            lblText.Spring = true;
            lblText.TextAlign = ContentAlignment.MiddleLeft;

            zoomControl = new ToolStripZoomControl();
            zoomControl.ZoomPageWidthClick += btnZoomPageWidth_Click;
            zoomControl.ZoomWholePageClick += btnZoomWholePage_Click;
            zoomControl.Zoom100Click += btnZoom100_Click;
            zoomControl.ValueChanged += slider_ValueChanged;

            Items.AddRange(new ToolStripItem[] { lblLocation, lblLocationRightBot, lblSize, lblText, zoomControl });
            Dock = DockStyle.Bottom;
            FDesigner.Controls.Add(this);

            UpdateDpiDependencies();
        }
    }
}