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

namespace FastReport.Forms
{
    internal partial class StyleEditorForm : BaseDialogForm
    {
        private Report report;
        private StyleCollection styles;
        private TextObject sample;
        private Timer refreshTimer;
        private bool updating;

        public Style CurrentStyle
        {
            get
            {
                if (lvStyles.SelectedItems.Count == 0)
                    return null;
                return lvStyles.SelectedItems[0].Tag as Style;
            }
        }

        private StyleCollection Styles
        {
            get { return styles; }
            set
            {
                styles = value.Clone();
                PopulateStyles();
            }
        }

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

            gbStyles.Text = res.Get("Styles");
            btnAdd.Text = res.Get("Add");
            btnDelete.Text = res.Get("Delete");
            btnEdit.Text = res.Get("Edit");
            btnLoad.Text = res.Get("Load");
            btnSave.Text = res.Get("Save");

            gbSettings.Text = res.Get("Settings");
            btnBorder.Text = res.Get("Border");
            btnFill.Text = res.Get("Fill");
            btnFont.Text = res.Get("Font");
            btnTextColor.Text = res.Get("TextColor");
            sample.Text = Res.Get("Misc,Sample");
        }

        private void pnSample_Paint(object sender, PaintEventArgs e)
        {
            if (CurrentStyle == null)
                return;
#if AVALONIA
            e.Graphics.FontScale = 1;
#endif
            float scale = this.DpiMultiplier();
            TextObject sample = new TextObject();
            sample.Text = Res.Get("Misc,Sample");
            sample.ApplyStyle(CurrentStyle);
            sample.Bounds = new RectangleF(2, 2, (int)(pnSample.Width / scale) - 4, (int)(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 RefreshSample()
        {
            pnSample.Refresh();
        }

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

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

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

        private void SetApply()
        {
            foreach (ListViewItem li in lvStyles.SelectedItems)
            {
                Style c = li.Tag as Style;
                c.ApplyBorder = cbApplyBorder.Checked;
                c.ApplyFill = cbApplyFill.Checked;
                c.ApplyTextFill = cbApplyTextFill.Checked;
                c.ApplyFont = cbApplyFont.Checked;
            }
            RefreshSample();
        }

        private void PopulateStyles()
        {
            lvStyles.Items.Clear();
            foreach (Style s in styles)
            {
                ListViewItem li = lvStyles.Items.Add(s.Name, 87);
                li.Tag = s;
            }
            if (lvStyles.Items.Count > 0)
                lvStyles.Items[0].Selected = true;
            UpdateControls();
            lvStyles.Focus();
        }

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

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

        private void lvStyles_AfterLabelEdit(object sender, LabelEditEventArgs e)
        {
            if (e.Label == null)
                return;
            if (e.Label == "")
            {
                e.CancelEdit = true;
                return;
            }
            Style s = lvStyles.Items[e.Item].Tag as Style;
            bool nameExists = false;
            foreach (Style s1 in styles)
            {
                if (s1 != s && String.Compare(s1.Name, e.Label) == 0)
                {
                    nameExists = true;
                    break;
                }
            }
            if (!nameExists)
                s.Name = e.Label;
            else
            {
                FRMessageBox.Error(Res.Get("Messages,DuplicateStyle"));
                e.CancelEdit = true;
            }
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            Style s = new Style();
            int styleNumber = 1;
            string baseName = Res.Get("Forms,Style,StyleName");
            while (styles.IndexOf(baseName + styleNumber.ToString()) != -1)
                styleNumber++;
            s.Name = baseName + styleNumber.ToString();
            styles.Add(s);
            ListViewItem li = lvStyles.Items.Add(s.Name, 87);
            li.Tag = s;
            li.BeginEdit();
        }

        private void btnEdit_Click(object sender, EventArgs e)
        {
            if (lvStyles.SelectedItems.Count == 1)
                lvStyles.SelectedItems[0].BeginEdit();
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            while (lvStyles.SelectedItems.Count > 0)
            {
                Style s = lvStyles.SelectedItems[0].Tag as Style;
                styles.Remove(s);
                lvStyles.Items.Remove(lvStyles.SelectedItems[0]);
            }
        }

        private void btnUp_Click(object sender, EventArgs e)
        {
            if (lvStyles.SelectedItems.Count != 1)
                return;
            int index = lvStyles.SelectedIndices[0];
            if (index > 0)
            {
                ListViewItem li = lvStyles.SelectedItems[0];
                lvStyles.Items.Remove(li);
                lvStyles.Items.Insert(index - 1, li);
                li.Selected = false;
                li.Selected = true;
                Style s = styles[index];
                styles.Remove(s);
                styles.Insert(index - 1, s);
            }
        }

        private void btnDown_Click(object sender, EventArgs e)
        {
            if (lvStyles.SelectedItems.Count != 1)
                return;
            int index = lvStyles.SelectedIndices[0];
            if (index < lvStyles.Items.Count - 1)
            {
                ListViewItem li = lvStyles.SelectedItems[0];
                lvStyles.Items.Remove(li);
                lvStyles.Items.Insert(index + 1, li);
                li.Selected = false;
                li.Selected = true;
                Style s = styles[index];
                styles.Remove(s);
                styles.Insert(index + 1, s);
            }
        }

        private void btnLoad_Click(object sender, EventArgs e)
        {
            using (OpenFileDialog dialog = new OpenFileDialog())
            {
                dialog.Filter = Res.Get("FileFilters,Style");
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    styles.Load(dialog.FileName);
                    PopulateStyles();
                }
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            using (SaveFileDialog dialog = new SaveFileDialog())
            {
                dialog.Filter = Res.Get("FileFilters,Style");
                dialog.DefaultExt = "frs";
                if (dialog.ShowDialog() == DialogResult.OK)
                    styles.Save(dialog.FileName);
            }
        }

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

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

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

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

        private void btnBorder_Click(object sender, EventArgs e)
        {
            if (CurrentStyle == null)
                return;
            using (BorderEditorForm editor = new BorderEditorForm())
            {
                editor.Border = CurrentStyle.Border.Clone();
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    foreach (ListViewItem li in lvStyles.SelectedItems)
                    {
                        (li.Tag as Style).Border = editor.Border.Clone();
                    }
                    RefreshSample();
                }
            }
        }

        private void btnColor_Click(object sender, EventArgs e)
        {
            if (CurrentStyle == null)
                return;
            using (FillEditorForm editor = new FillEditorForm())
            {
                editor.Fill = CurrentStyle.Fill.Clone();
                if (editor.ShowDialog() == DialogResult.OK)
                {
                    foreach (ListViewItem li in lvStyles.SelectedItems)
                    {
                        (li.Tag as Style).Fill = editor.Fill.Clone();
                    }
                    RefreshSample();
                }
            }
        }

        private void btnFont_Click(object sender, EventArgs e)
        {
            if (CurrentStyle == null)
                return;
            using (FontDialog dialog = new FontDialog())
            {
                dialog.Font = CurrentStyle.Font;
                if (dialog.ShowDialog() == DialogResult.OK)
                {
                    foreach (ListViewItem li in lvStyles.SelectedItems)
                    {
                        (li.Tag as Style).Font = new Font(dialog.Font.FontFamily, (float)Math.Round(dialog.Font.Size), dialog.Font.Style);
                    }
                    RefreshSample();
                }
            }
        }

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

        private void StyleEditorForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (DialogResult == DialogResult.OK)
            {
                report.Styles = Styles;
                report.ApplyStyles();
            }
            sample.Dispose();
            refreshTimer.Dispose();
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            btnUp.Image = GetImage(208);
            btnDown.Image = GetImage(209);
            btnBorder.Image = GetImage(36);
            btnFill.Image = GetImage(38);
            btnFont.Image = GetImage(59);
            btnTextColor.Image = GetImage(23);
            lvStyles.SmallImageList = GetImages();
        }

        public StyleEditorForm(Report report)
        {
            this.report = report;
            sample = new TextObject();
            refreshTimer = new Timer();
            refreshTimer.Interval = 50;
            refreshTimer.Tick += new EventHandler(FTimer_Tick);
            InitializeComponent();
            Localize();
            Styles = this.report.Styles;
            UIUtils.CheckRTL(this);
            UpdateDpiDependencies();
        }
    }
}