using System;
using System.Collections.Generic;
using System.Text;
using System.Drawing;
using System.Drawing.Drawing2D;
using FastReport.Design;
using System.Windows.Forms;
using FastReport.Forms;

namespace FastReport
{
    /// <summary>
    /// Holds the list of <see cref="ReportComponentBase"/> objects currently selected in the designer.
    /// </summary>
    /// <remarks>
    /// This class is used by the "Border and Fill" toolbar. Use methods of this class to perform some 
    /// operations on the selected objects. 
    /// <para/>Note: after calling any method in this class, call the 
    /// <see cref="Designer.SetModified()">Designer.SetModified</see> method to reflect changes.
    /// <para/>Note: this list contains only objects of <see cref="ReportComponentBase"/> type. 
    /// If you want to access all selected objects, use the <see cref="Designer.SelectedObjects"/> property.
    /// </remarks>
    public class SelectedReportComponents
    {
        private List<ReportComponentBase> list;
        private Designer designer;

        /// <summary>
        /// Gets the first selected object.
        /// </summary>
        public ReportComponentBase First
        {
            get { return list.Count > 0 ? list[0] : null; }
        }

        /// <summary>
        /// Gets the number of selected objects.
        /// </summary>
        public int Count
        {
            get { return list.Count; }
        }

        /// <summary>
        /// Gets a value indicating whether the operations are enabled.
        /// </summary>
        public bool Enabled
        {
            get
            {
                return Count > 1 || (Count == 1 && !First.HasRestriction(Restrictions.DontModify));
            }
        }

        /// <summary>
        /// Gets a value indicating whether the object with simple border is selected.
        /// </summary>
        /// <remarks>
        /// When the object has a simple border, you cannot change individual border lines.
        /// Example of such an object is the "Shape" and "Line" objects.
        /// </remarks>
        public bool SimpleBorder
        {
            get
            {
                foreach (ReportComponentBase c in list)
                {
                    if (!c.FlagSimpleBorder)
                        return false;
                }
                return true;
            }
        }

        /// <summary>
        /// Gets a value indicating whether the border operations are enabled.
        /// </summary>
        public bool BorderEnabled
        {
            get
            {
                foreach (ReportComponentBase c in list)
                {
                    if (c.FlagUseBorder)
                        return true;
                }
                return false;
            }
        }

        /// <summary>
        /// Gets a value indicating whether the fill operations are enabled.
        /// </summary>
        public bool FillEnabled
        {
            get
            {
                foreach (ReportComponentBase c in list)
                {
                    if (c.FlagUseFill)
                        return true;
                }
                return false;
            }
        }

        private List<ReportComponentBase> ModifyList
        {
            get { return list.FindAll(CanModify); }
        }

        private bool CanModify(ReportComponentBase c)
        {
            return !c.HasRestriction(Restrictions.DontModify);
        }

        internal void Update()
        {
            list.Clear();
            if (designer.SelectedObjects != null)
            {
                foreach (Base c in designer.SelectedObjects)
                {
                    if (c is ReportComponentBase)
                        list.Add(c as ReportComponentBase);
                }
            }
        }

        /// <summary>
        /// Sets the solid fill color for the selected objects.
        /// </summary>
        /// <param name="color">Fill color.</param>
        public void SetColor(Color color)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Fill = new SolidFill(color);
            }
            designer.LastFormatting.Fill = new SolidFill(color);
            designer.SetModified();
        }

        /// <summary>
        /// Sets the fill for the selected objects.
        /// </summary>
        /// <param name="fill">Fill.</param>
        public void SetFill(FillBase fill)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Fill = fill.Clone();
            }
            designer.LastFormatting.Fill = fill.Clone();
            designer.SetModified();
        }

        /// <summary>
        /// Sets the style for the selected objects.
        /// </summary>
        /// <param name="style">Style name.</param>
        public void SetStyle(string style)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Style = style;
            }
            designer.SetModified();
        }

        /// <summary>
        /// Sets the hyperlink for the selected objects.
        /// </summary>
        /// <param name="hyperlink">Hyperlink.</param>
        /// <param name="modifyAppearance">Indicates whether to modify the object's appearance.</param>
        /// <param name="setModified">Indicates whether it is necessary to change designer's modified state.</param>
        public void SetHyperlink(Hyperlink hyperlink, bool modifyAppearance, bool setModified)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Hyperlink.Assign(hyperlink);
                if (modifyAppearance)
                {
                    c.Cursor = Cursors.Hand;
                    if (c is TextObject)
                    {
                        (c as TextObject).TextFill = new SolidFill(Color.Blue);
                        (c as TextObject).Font = new Font((c as TextObject).Font, (c as TextObject).Font.Style | FontStyle.Underline);
                    }
                }
            }
            if (setModified)
                designer.SetModified();
        }

        /// <summary>
        /// Sets the CanGrow flag for the selected objects.
        /// </summary>
        /// <param name="value">Flag value.</param>
        public void SetCanGrow(bool value)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.CanGrow = value;
            }
            designer.SetModified();
        }

        /// <summary>
        /// Sets the CanShrink flag for the selected objects.
        /// </summary>
        /// <param name="value">Flag value.</param>
        public void SetCanShrink(bool value)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.CanShrink = value;
            }
            designer.SetModified();
        }

        /// <summary>
        /// Sets the GrowToBottom flag for the selected objects.
        /// </summary>
        /// <param name="value">Flag value.</param>
        public void SetGrowToBottom(bool value)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.GrowToBottom = value;
            }
            designer.SetModified();
        }

        /// <summary>
        /// Toggles the specified border line for the selected objects.
        /// </summary>
        /// <param name="line">Border line.</param>
        /// <param name="toggle">Toggle value.</param>
        public void ToggleLine(BorderLines line, bool toggle)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                if (toggle)
                    c.Border.Lines |= line;
                else
                    c.Border.Lines &= ~line;
            }
            designer.LastFormatting.Border.Lines = First.Border.Lines;
            designer.SetModified();
        }

        /// <summary>
        /// Sets the border color for the selected objects.
        /// </summary>
        /// <param name="color">Border color.</param>
        public void SetLineColor(Color color)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Border.Color = color;
            }
            designer.LastFormatting.Border.Color = color;
            designer.SetModified();
        }

        /// <summary>
        /// Sets the border width for the selected objects.
        /// </summary>
        /// <param name="width">Border width.</param>
        public void SetWidth(float width)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Border.Width = width;
            }
            designer.LastFormatting.Border.Width = width;
            designer.SetModified();
        }

        /// <summary>
        /// Sets the border style for the selected objects.
        /// </summary>
        /// <param name="style">Border style.</param>
        public void SetLineStyle(LineStyle style)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Border.Style = style;
            }
            designer.LastFormatting.Border.Style = style;
            designer.SetModified();
        }

        /// <summary>
        /// Sets the border for the selected objects.
        /// </summary>
        /// <param name="border">Border.</param>
        public void SetBorder(Border border)
        {
            foreach (ReportComponentBase c in ModifyList)
            {
                c.Border = border.Clone();
            }
            designer.LastFormatting.Border = border.Clone();
            designer.SetModified();
        }

        /// <summary>
        /// Invokes the fill editor for the selected objects.
        /// </summary>
        /// <returns><b>true</b> if editor was closed by the OK button.</returns>
        public bool InvokeFillEditor()
        {
            using (FillEditorForm editor = new FillEditorForm())
            {
                editor.Fill = First.Fill.Clone();
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    SetFill(editor.Fill);
                    return true;
                }
            }
            return false;
        }

        /// <summary>
        /// Invokes the border editor for the selected objects.
        /// </summary>
        /// <returns><b>true</b> if editor was closed by the OK button.</returns>
        public bool InvokeBorderEditor()
        {
            using (BorderEditorForm editor = new BorderEditorForm())
            {
                editor.Border = First.Border.Clone();
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    SetBorder(editor.Border);
                    return true;
                }
            }
            return false;
        }

        /// <summary>
        /// Invokes the hyperlink editor for the selected objects.
        /// </summary>
        /// <returns><b>true</b> if editor was closed by the OK button.</returns>
        public bool InvokeHyperlinkEditor()
        {
            using (HyperlinkEditorForm form = new HyperlinkEditorForm())
            {
                form.ReportComponent = First;
                if (form.ShowDialog() == DialogResult.OK)
                {
                    SetHyperlink(form.Hyperlink, form.ModifyAppearance, true);
                    return true;
                }
            }
            return false;
        }

        internal SelectedReportComponents(Designer designer)
        {
            this.designer = designer;
            list = new List<ReportComponentBase>();
        }

    }
}