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

namespace FastReport.Forms
{
    internal partial class HighlightEditorForm : BaseDialogForm
    {
        private Report report;
        private ImageList images;
        private ConditionCollection conditions;
        private Timer refreshTimer;
        private bool updating;

        public ConditionCollection Conditions
        {
            get { return conditions; }
            set
            {
                conditions = new ConditionCollection();
                conditions.Assign(value);
                PopulateConditions();
            }
        }

        private HighlightCondition CurrentCondition
        {
            get
            {
                if (lvConditions.SelectedItems.Count == 0)
                    return null;
                return lvConditions.SelectedItems[0].Tag as HighlightCondition;
            }
        }

        private Bitmap GetImage(HighlightCondition c)
        {
            Bitmap bmp = new Bitmap(16, 16);
            using (Graphics g = Graphics.FromImage(bmp))
            {
                g.FillRectangle(Brushes.White, new RectangleF(0, 0, 16, 16));

                using (TextObject sample = new TextObject())
                {
                    sample.Bounds = new RectangleF(0, 0, 16, 16);
                    sample.ApplyCondition(c);
                    sample.Font = new Font("Times New Roman", 12);
                    sample.Text = "A";
                    sample.HorzAlign = HorzAlign.Center;
                    sample.VertAlign = VertAlign.Center;

                    using (GraphicCache cache = new GraphicCache())
                    {
                        sample.Draw(new FRPaintEventArgs(g, 1, 1, cache));
                    }
                }
            }

            return bmp;
        }

        private int GetImageIndex(HighlightCondition c)
        {
            Bitmap bmp = GetImage(c);
            images.Images.Add(bmp);
            return images.Images.Count - 1;
        }

        private void RefreshSample()
        {
            pnSample.Refresh();
        }

        private void UpdateControls()
        {
            bool enabled = CurrentCondition != null;
            btnDelete.Enabled = enabled;
            btnEdit.Enabled = enabled;
            btnUp.Enabled = enabled;
            btnDown.Enabled = enabled;
            gbStyle.Enabled = enabled;

            if (enabled)
            {
                updating = true;
                cbApplyBorder.Checked = CurrentCondition.ApplyBorder;
                cbApplyFill.Checked = CurrentCondition.ApplyFill;
                cbApplyTextFill.Checked = CurrentCondition.ApplyTextFill;
                cbApplyFont.Checked = CurrentCondition.ApplyFont;
                cbVisible.Checked = CurrentCondition.Visible;

                btnBorder.Enabled = CurrentCondition.ApplyBorder;
                btnFill.Enabled = CurrentCondition.ApplyFill;
                btnTextColor.Enabled = CurrentCondition.ApplyTextFill;
                btnFont.Enabled = CurrentCondition.ApplyFont;
                updating = false;
            }
        }

        private void SetApply()
        {
            foreach (ListViewItem li in lvConditions.SelectedItems)
            {
                HighlightCondition c = li.Tag as HighlightCondition;
                c.ApplyBorder = cbApplyBorder.Checked;
                c.ApplyFill = cbApplyFill.Checked;
                c.ApplyTextFill = cbApplyTextFill.Checked;
                c.ApplyFont = cbApplyFont.Checked;
                c.Visible = cbVisible.Checked;
                li.ImageIndex = GetImageIndex(c);
            }
            RefreshSample();
        }

        private void PopulateConditions()
        {
            foreach (HighlightCondition c in conditions)
            {
                ListViewItem li = lvConditions.Items.Add(c.Expression, GetImageIndex(c));
                li.Tag = c;
            }
            if (lvConditions.Items.Count > 0)
                lvConditions.Items[0].Selected = true;
            UpdateControls();
        }

        private void pnSample_Paint(object sender, PaintEventArgs e)
        {
            if (CurrentCondition == null)
                return;

#if AVALONIA
            e.Graphics.FontScale = 1;
#endif
            using (TextObject sample = new TextObject())
            {
                sample.Text = Res.Get("Misc,Sample");
                sample.ApplyCondition(CurrentCondition);
                float scale = this.DpiMultiplier();
                sample.Bounds = new RectangleF(2, 2, pnSample.Width / scale - 4, pnSample.Height / scale - 4);
                sample.HorzAlign = HorzAlign.Center;
                sample.VertAlign = VertAlign.Center;
                using (GraphicCache cache = new GraphicCache())
                {
                    sample.Draw(new FRPaintEventArgs(e.Graphics, scale, scale, cache));
                }
            }
        }

        private void FTimer_Tick(object sender, EventArgs e)
        {
            UpdateControls();
            RefreshSample();
            refreshTimer.Stop();
        }

        private void lvConditions_SelectedIndexChanged(object sender, EventArgs e)
        {
            refreshTimer.Start();
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            using (ExpressionEditorForm form = new ExpressionEditorForm(report))
            {
                form.ExpressionText = report.ScriptLanguage == Language.CSharp ? "Value == 0" : "Value = 0";
                if (form.ShowDialog() == DialogResult.OK)
                {
                    HighlightCondition c = new HighlightCondition();
                    conditions.Add(c);
                    c.Expression = form.ExpressionText;

                    ListViewItem li = lvConditions.Items.Add(c.Expression, GetImageIndex(c));
                    li.Tag = c;
                    lvConditions.SelectedItems.Clear();
                    li.Selected = true;
                }
            }
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            while (lvConditions.SelectedItems.Count > 0)
            {
                HighlightCondition c = lvConditions.SelectedItems[0].Tag as HighlightCondition;
                conditions.Remove(c);
                lvConditions.Items.Remove(lvConditions.SelectedItems[0]);
            }
        }

        private void btnEdit_Click(object sender, EventArgs e)
        {
            if (lvConditions.SelectedItems.Count == 1)
            {
                using (ExpressionEditorForm form = new ExpressionEditorForm(report))
                {
                    form.ExpressionText = CurrentCondition.Expression;
                    if (form.ShowDialog() == DialogResult.OK)
                    {
                        CurrentCondition.Expression = form.ExpressionText;
                        lvConditions.SelectedItems[0].Text = CurrentCondition.Expression;
                    }
                }
            }
        }

        private void btnUp_Click(object sender, EventArgs e)
        {
            if (lvConditions.SelectedItems.Count != 1)
                return;
            int index = lvConditions.SelectedIndices[0];
            if (index > 0)
            {
                ListViewItem li = lvConditions.SelectedItems[0];
                lvConditions.Items.Remove(li);
                lvConditions.Items.Insert(index - 1, li);
                li.Selected = false;
                li.Selected = true;
                HighlightCondition c = li.Tag as HighlightCondition;
                conditions.Remove(c);
                conditions.Insert(index - 1, c);
            }
        }

        private void btnDown_Click(object sender, EventArgs e)
        {
            if (lvConditions.SelectedItems.Count != 1)
                return;
            int index = lvConditions.SelectedIndices[0];
            if (index < lvConditions.Items.Count - 1)
            {
                ListViewItem li = lvConditions.SelectedItems[0];
                lvConditions.Items.Remove(li);
                lvConditions.Items.Insert(index + 1, li);
                li.Selected = false;
                li.Selected = true;
                HighlightCondition c = li.Tag as HighlightCondition;
                conditions.Remove(c);
                conditions.Insert(index + 1, c);
            }
        }

        private void cbApplyBorder_CheckedChanged(object sender, EventArgs e)
        {
            if (updating || CurrentCondition == null)
                return;
            btnBorder.Enabled = cbApplyBorder.Checked;
            SetApply();
        }

        private void cbApplyFill_CheckedChanged(object sender, EventArgs e)
        {
            if (updating || CurrentCondition == null)
                return;
            btnFill.Enabled = cbApplyFill.Checked;
            SetApply();
        }

        private void cbApplyTextFill_CheckedChanged(object sender, EventArgs e)
        {
            if (updating || CurrentCondition == null)
                return;
            btnTextColor.Enabled = cbApplyTextFill.Checked;
            SetApply();
        }

        private void cbApplyFont_CheckedChanged(object sender, EventArgs e)
        {
            if (updating || CurrentCondition == null)
                return;
            btnFont.Enabled = cbApplyFont.Checked;
            SetApply();
        }

        private void btnBorder_Click(object sender, EventArgs e)
        {
            if (CurrentCondition == null)
                return;

            using (BorderEditorForm editor = new BorderEditorForm())
            {
                editor.Border = CurrentCondition.Border.Clone();
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    foreach (ListViewItem li in lvConditions.SelectedItems)
                    {
                        HighlightCondition c = li.Tag as HighlightCondition;
                        c.Border = editor.Border.Clone();
                        li.ImageIndex = GetImageIndex(c);
                    }
                    RefreshSample();
                }
            }
        }

        private void btnFill_Click(object sender, EventArgs e)
        {
            if (CurrentCondition == null)
                return;
            using (FillEditorForm editor = new FillEditorForm())
            {
                editor.Fill = CurrentCondition.Fill.Clone();
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    foreach (ListViewItem li in lvConditions.SelectedItems)
                    {
                        HighlightCondition c = li.Tag as HighlightCondition;
                        c.Fill = editor.Fill.Clone();
                        li.ImageIndex = GetImageIndex(c);
                    }
                    RefreshSample();
                }
            }
        }

        private void btnTextColor_Click(object sender, EventArgs e)
        {
            if (CurrentCondition == null)
                return;
            using (FillEditorForm editor = new FillEditorForm())
            {
                editor.Fill = CurrentCondition.TextFill.Clone();
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    foreach (ListViewItem li in lvConditions.SelectedItems)
                    {
                        HighlightCondition c = li.Tag as HighlightCondition;
                        c.TextFill = editor.Fill.Clone();
                        li.ImageIndex = GetImageIndex(c);
                    }
                    RefreshSample();
                }
            }
        }

        private void btnFont_Click(object sender, EventArgs e)
        {
            if (CurrentCondition == null)
                return;
            using (FontDialog dialog = new FontDialog())
            {
                dialog.Font = CurrentCondition.Font;
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    foreach (ListViewItem li in lvConditions.SelectedItems)
                    {
                        HighlightCondition c = li.Tag as HighlightCondition;
                        c.Font = dialog.Font;
                        li.ImageIndex = GetImageIndex(c);
                    }
                    RefreshSample();
                }
            }
        }

        private void cbVisible_CheckedChanged(object sender, EventArgs e)
        {
            if (updating || CurrentCondition == null)
                return;
            SetApply();
        }

        private void HighlightEditorForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            Done();
        }

        private void Init()
        {
            images = new ImageList();
            images.ImageSize = new Size(16, 16);
            images.ColorDepth = ColorDepth.Depth24Bit;
            lvConditions.SmallImageList = images;
            refreshTimer = new Timer();
            refreshTimer.Interval = 50;
            refreshTimer.Tick += FTimer_Tick;
        }

        private void Done()
        {
            images.Dispose();
        }

        public override void Localize()
        {
            base.Localize();
            MyRes res = new MyRes("Forms,HighlightEditor");
            Text = res.Get("");

            gbConditions.Text = res.Get("Conditions");
            btnAdd.Text = res.Get("Add");
            btnDelete.Text = res.Get("Delete");
            btnEdit.Text = res.Get("Edit");

            gbStyle.Text = res.Get("Style");
            btnBorder.Text = Res.Get("Forms,Style,Border");
            btnFill.Text = res.Get("Fill");
            btnTextColor.Text = res.Get("TextColor");
            btnFont.Text = res.Get("Font");
            cbVisible.Text = res.Get("Visible");
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            btnUp.Image = GetImage(208);
            btnDown.Image = GetImage(209);
            btnBorder.Image = GetImage(36);
            btnFill.Image = GetImage(38);
            btnTextColor.Image = GetImage(23);
            btnFont.Image = GetImage(59);
            MinimumSize = this.LogicalToDevice(new Size(480, 322));
        }

        public HighlightEditorForm(Report report)
        {
            this.report = report;
            CanSaveRestoreState = true;
            InitializeComponent();
            Init();
            Localize();
            UIUtils.CheckRTL(this);
            UpdateDpiDependencies();
        }

    }
}