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

namespace FastReport.FastQueryBuilder
{
    internal class FieldsView : DataGridView
    {
        private List<Field> fields;
        public List<Field> Fields
        {
            get => fields;
            set
            {
                fields = value;

                // build a copy of fields list. Do not use DataSource = null; DataSource = value; because of bug in SWF
                var newList = new List<Field>();
                newList.AddRange(fields);
                DataSource = newList;

                UpdateGroupedFields();
            }
        }

        public List<Field> Groups { get; set; }

        public FieldsView()
        {
            AllowUserToAddRows = false;
            AllowUserToDeleteRows = false;
            AllowUserToResizeRows = false;
            AutoGenerateColumns = false;
            BackgroundColor = SystemColors.Control;
            ColumnHeadersHeightSizeMode = DataGridViewColumnHeadersHeightSizeMode.AutoSize;
            GridColor = SystemColors.Control;
            RowHeadersVisible = false;
            CellEndEdit += DoCellEndEdit;

            MyRes res = new MyRes("Forms,QueryBuilder");

            var nameColumn = new DataGridViewTextBoxColumn();
            nameColumn.HeaderText = res.Get("Name");
            nameColumn.DataPropertyName = "FullName";
            nameColumn.ReadOnly = true;

            var aliasColumn = new DataGridViewTextBoxColumn();
            aliasColumn.HeaderText = res.Get("Alias");
            aliasColumn.DataPropertyName = "Alias";

            var filterColumn = new DataGridViewTextBoxColumn();
            filterColumn.HeaderText = res.Get("Filter");
            filterColumn.DataPropertyName = "Filter";

            var groupColumn = new DataGridViewCheckBoxColumn();
            groupColumn.HeaderText = res.Get("Group");
            groupColumn.DataPropertyName = "Group";

            var orderColumn = new DataGridViewComboBoxColumn();
            orderColumn.HeaderText = res.Get("Order");
            orderColumn.DataPropertyName = "Order";
            orderColumn.FlatStyle = FlatStyle.Flat;
            orderColumn.Items.AddRange(new string[] { "", "Asc", "Desc" });

            var funcColumn = new DataGridViewComboBoxColumn();
            funcColumn.HeaderText = res.Get("Func");
            funcColumn.DataPropertyName = "Func";
            funcColumn.FlatStyle = FlatStyle.Flat;
            funcColumn.Items.AddRange(new string[] { "", "Avg", "Count", "Max", "Min", "Sum" });

            Columns.AddRange(new DataGridViewColumn[] { nameColumn, aliasColumn, filterColumn, groupColumn, orderColumn, funcColumn });
        }

        protected override void OnSizeChanged(EventArgs e)
        {
            base.OnSizeChanged(e);
            if (Columns.Count > 0)
            {
                int fixedWidth = 80;
                Columns[3].Width = Columns[4].Width = Columns[5].Width = this.LogicalToDevice(fixedWidth);
                Columns[0].Width = Columns[1].Width = Columns[2].Width = (Width - this.LogicalToDevice(fixedWidth * 3 + SystemInformation.VerticalScrollBarWidth)) / 3 - 1;
            }
        }

        private void DoCellEndEdit(object sender, DataGridViewCellEventArgs e)
        {
            UpdateGroupedFields();
        }

        private void UpdateGroupedFields()
        {
            if (Groups == null)
                return;

            // remove
            for (int i = 0; i < Groups.Count; i++)
            {
                if (!Fields.Contains(Groups[i]) || !Groups[i].Group)
                {
                    Groups.RemoveAt(i);
                    i--;
                }
            }

            // add
            foreach (Field f in Fields)
            {
                if (!Groups.Contains(f) && f.Group)
                    Groups.Add(f);
            }
        }

    }
}