using System;
using System.Collections.Generic;
using System.Windows.Forms;
using FastReport.Utils;
using FastReport.Dialog;
using FastReport.Data;


namespace FastReport.Forms
{
    internal partial class GridControlColumnsEditorForm : BaseDialogForm
    {
        private GridControl grid;
        private GridControl saveGrid;
        private Timer timer;

        public GridControl Grid
        {
            get { return grid; }
            set
            {
                grid = value;
                saveGrid = new GridControl();
                saveGrid.Assign(value);
                PopulateColumns();
                btnAddAll.Enabled = grid.DataSource != null;
            }
        }

        private GridControlColumnCollection Columns
        {
            get { return grid.Columns; }
        }

        private GridControlColumn CurrentColumn
        {
            get
            {
                if (lvColumns.SelectedItems.Count == 0)
                    return null;
                return lvColumns.SelectedItems[0].Tag as GridControlColumn;
            }
        }

        private void PopulateColumns()
        {
            lvColumns.Items.Clear();
            foreach (GridControlColumn c in Columns)
            {
                ListViewItem li = lvColumns.Items.Add(c.HeaderText, 113);
                li.Tag = c;
            }
            if (lvColumns.Items.Count > 0)
                lvColumns.Items[0].Selected = true;
            UpdateControls();
            lvColumns.Focus();
        }

        private void UpdateControls()
        {
            bool enabled = CurrentColumn != null;
            btnRemove.Enabled = enabled;
            btnUp.Enabled = enabled;
            btnDown.Enabled = enabled;
            gbProperties.Enabled = enabled;

            List<object> selectedObjects = new List<object>();
            foreach (ListViewItem li in lvColumns.SelectedItems)
            {
                selectedObjects.Add(li.Tag);
            }
            frPropertyGrid1.SelectedObjects = selectedObjects.ToArray();
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            GridControlColumn column = new GridControlColumn();
            column.HeaderText = "Column";
            Columns.Add(column);
            ListViewItem li = lvColumns.Items.Add(column.HeaderText, 113);
            li.Tag = column;
            li.BeginEdit();
            UpdateControls();
        }

        private void btnRemove_Click(object sender, EventArgs e)
        {
            while (lvColumns.SelectedItems.Count > 0)
            {
                GridControlColumn c = lvColumns.SelectedItems[0].Tag as GridControlColumn;
                Columns.Remove(c);
                lvColumns.Items.Remove(lvColumns.SelectedItems[0]);
            }
        }

        private void btnAddAll_Click(object sender, EventArgs e)
        {
            grid.Columns.Clear();
            foreach (Column column in grid.DataSource.Columns)
            {
                GridControlColumn gridColumn = new GridControlColumn();
                gridColumn.HeaderText = column.Alias;
                gridColumn.DataColumn = grid.DataSource.Alias + "." + column.Alias;
                grid.Columns.Add(gridColumn);
            }
            PopulateColumns();
        }

        private void btnUp_Click(object sender, EventArgs e)
        {
            if (lvColumns.SelectedItems.Count != 1)
                return;
            int index = lvColumns.SelectedIndices[0];
            if (index > 0)
            {
                ListViewItem li = lvColumns.SelectedItems[0];
                lvColumns.Items.Remove(li);
                lvColumns.Items.Insert(index - 1, li);
                GridControlColumn c = Columns[index];
                Columns.Remove(c);
                Columns.Insert(index - 1, c);
                grid.Assign(grid);
            }
        }

        private void btnDown_Click(object sender, EventArgs e)
        {
            if (lvColumns.SelectedItems.Count != 1)
                return;
            int index = lvColumns.SelectedIndices[0];
            if (index < lvColumns.Items.Count - 1)
            {
                ListViewItem li = lvColumns.SelectedItems[0];
                lvColumns.Items.Remove(li);
                lvColumns.Items.Insert(index + 1, li);
                GridControlColumn c = Columns[index];
                Columns.Remove(c);
                Columns.Insert(index + 1, c);
                grid.Assign(grid);
            }
        }

        private void lvColumns_SelectedIndexChanged(object sender, EventArgs e)
        {
            timer.Start();
        }

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

        private void lvColumns_AfterLabelEdit(object sender, LabelEditEventArgs e)
        {
            if (e.Label == null)
                return;
            if (e.Label == "")
            {
                e.CancelEdit = true;
                return;
            }
            GridControlColumn c = lvColumns.Items[e.Item].Tag as GridControlColumn;
            c.HeaderText = e.Label;
            UpdateControls();
        }

        private void frPropertyGrid1_PropertyValueChanged(object s, PropertyValueChangedEventArgs e)
        {
            List<object> selectedObjects = new List<object>();
            selectedObjects.AddRange(frPropertyGrid1.SelectedObjects);
            foreach (ListViewItem li in lvColumns.Items)
            {
                GridControlColumn column = li.Tag as GridControlColumn;
                if (selectedObjects.Contains(column))
                    li.Text = column.HeaderText;
            }
        }

        private void GridControlColumnsEditorForm_FormClosed(object sender, FormClosedEventArgs e)
        {
            if (DialogResult != DialogResult.OK)
            {
                grid.Clear();
                grid.Assign(saveGrid);
            }
            timer.Dispose();
        }

        public override void Localize()
        {
            base.Localize();
            MyRes res = new MyRes("Forms,GridControlColumnsEditor");
            Text = res.Get("");
            gbColumns.Text = res.Get("Columns");
            gbProperties.Text = res.Get("Properties");
            btnAdd.Text = res.Get("Add");
            btnRemove.Text = res.Get("Remove");
            btnAddAll.Text = res.Get("AddAll");
        }

        public override void UpdateDpiDependencies()
        {
            base.UpdateDpiDependencies();
            btnUp.Image = GetImage(208);
            btnDown.Image = GetImage(209);
            lvColumns.SmallImageList = GetImages();
        }

        public GridControlColumnsEditorForm()
        {
            InitializeComponent();
            Localize();
            timer = new Timer();
            timer.Interval = 50;
            timer.Tick += new EventHandler(FTimer_Tick);
            UIUtils.CheckRTL(this);
            UpdateDpiDependencies();
        }
    }
}