using HotelPms.Share.Util;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Diagnostics;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace HotelPms.Share.Windows.Tool
{
    public partial class DataSelector : Form
    {
        #region  ★★★★★　Declartions　★★★★★

        [Flags]
        public enum Style : int
        {
            None = 0x1,
            HideBottom = 0x2,
            HideReturnField = 0x4,
            HideGridHeader = 0x8,
        }

        private List<string> m_CurrentRow = new List<string>();


        public List<string> SelecetdItem
        {
            get
            {
                return m_CurrentRow;
            }
        }

        private DataView DtView = new DataView();

        // 共通変数
        private int intReturnField_IndexNo; // ReturnFieldのIndex
        private bool strVisibleBottom = true;
        private bool strVisibleReturnField = true;
        private bool visibleGridHeader = true;

        #endregion

        #region  ★★★★★　Property　★★★★★

        public bool IsReturnRow { get; set; } = false;

        public Control OwnerControl { get; set; } = null;

        public DataTable Data { get; set; } = null;

        /// <summary>
        /// ReturnField(選択したときに返すフィールド名)
        /// </summary>
        public string ReturnField { get; set; } = "コード";

        public string SearchField { get; set; } = "名称";

        public Style CurStyle { get; set; } = Style.None;

        public List<int> ColWidth { get; set; } = new List<int>();

        /// <summary>
        /// ReturnValue(選択後に取得できる値)
        /// </summary>
        public string ReturnValue { get; set; } = string.Empty;

        #endregion

        #region  ★★★★★　Class Event　★★★★★

        public DataSelector(Control obj)
        {
            InitializeComponent();
            OwnerControl = obj;
        }

        private void CalendarSelector_Load(object sender, EventArgs e)
        {
            //如果要将Control1（例如Label1或者Button1）上的点（x,y）转换成屏幕上的点（x1,y1），那么就调用Control1.PointToScreen。
            //反之，如果要将屏幕的(x1,y1)变成控件上的(x,y)，那么就调用Control1.PointToClient。
            //eg1：求Button1的左上角在屏幕上的位置。
            //Point p = new Point(0, 0);     //   0,0   是左上角
            //p = Button1.PointToScreen(p);
            Point location = OwnerControl.PointToScreen(new Point(0, 0));
            location = new Point(location.X -1,location.Y + OwnerControl.Height - 2);
            Screen currentScreen = Screen.FromControl(OwnerControl);
            if (location.X + this.Width > currentScreen.WorkingArea.X + currentScreen.WorkingArea.Width) { location.X = currentScreen.WorkingArea.X + currentScreen.WorkingArea.Width - this.Width; }
            if(location.Y+ this.Height > currentScreen.WorkingArea.Y + currentScreen.WorkingArea.Height) { location.Y -= (currentScreen.WorkingArea.Y + OwnerControl.Height - 2 + this.Height); }
            this.Location = location;

            if ((CurStyle & Style.HideBottom) == Style.HideBottom) { strVisibleBottom = false; }
            if ((CurStyle & Style.HideGridHeader) == Style.HideGridHeader) { visibleGridHeader = false; }
            if ((CurStyle & Style.HideReturnField) == Style.HideReturnField) { strVisibleReturnField = false; }

            Data.TableName = "SelectTable";
            DtView.Table = Data;
            DtView.RowFilter = "";

            // データを表示
            this.DataGridView1.DataSource = DtView;

            //下部の検索キーと閉じるボタンを表示するか(初期値:True(表示))
            pnlFilter.Visible = strVisibleBottom;

            //ReturnField(戻り値を返す項目列名)のIndexNoを取得する。
            intReturnField_IndexNo = -1;

            if (ReturnField.Length == 0)
            {
                intReturnField_IndexNo = 0;
            }
            else
            {
                for (int i = 0; i < this.DataGridView1.Columns.Count; i++)
                {
                    if (this.DataGridView1.Columns[i].HeaderText.ToString() == ReturnField.ToString())
                    {
                        intReturnField_IndexNo = i;
                    }
                }
            }

            //ReturnField(戻り値を返す項目列名)を取得する。
            if (ReturnField.Length == 0)
            {
                ReturnField = this.DtView.Table.Columns[intReturnField_IndexNo].ColumnName.ToString();
            }

            //SearchField(検索キーに関連させる項目列名)を取得する。
            if (SearchField.Length == 0)
            {
                SearchField = this.DtView.Table.Columns[intReturnField_IndexNo + 1].ColumnName.ToString();
            }

            //VisibleReturnField = falseの場合、ReturnFieldを非表示とする。
            if ((!strVisibleReturnField) && (intReturnField_IndexNo > -1))
            {
                this.DataGridView1.Columns[intReturnField_IndexNo].Visible = false;
            }

            if (Data.Rows.Count == 0)
            {
                MessageBox.Show("該当データがありません。");
                this.Close();
                return;
            }

            this.DataGridView1.ColumnHeadersVisible = visibleGridHeader;

            //エラー処理
            if (!ValidateInput())
            {
                Debug.Assert(false, "開発用Error", "Selectが不適切、searchFieldが数値、文字列以外");

            }

            DataGridView1.EnableHeadersVisualStyles = false;
            DataGridView1.ColumnHeadersHeight = 25;
            foreach (DataGridViewColumn col in DataGridView1.Columns)
            {
                col.HeaderCell.Style.BackColor = System.Drawing.Color.FromArgb(50, 50, 100);
                col.HeaderCell.Style.ForeColor = Color.White;
            }

            DataGridView1.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.None;
            DataGridView1.AllowUserToResizeColumns = true;
            if (ColWidth == null || ColWidth.Count == 0)
            {
                DataGridView1.Columns[1].AutoSizeMode = DataGridViewAutoSizeColumnMode.Fill;
            }
            else
            {
                for (int i = 0; i < ColWidth.Count; i++)
                {
                    DataGridView1.Columns[i].Width = ColWidth[i];
                }
            }


            if(DataGridView1.Rows.Count > 0)
            {
                DataGridView1.Rows[0].Cells[0].Selected = true;
                DataGridView1.CurrentCell = DataGridView1.Rows[0].Cells[0];
                this.ActiveControl = DataGridView1;
            }
        }

        private void DataSelector_KeyDown(object sender, KeyEventArgs e)
        {
            switch (e.KeyCode)
            {
                case Keys.Escape:
                    e.Handled = true;
                    ReturnValue = string.Empty;
                    this.Close();
                    break;
            }
        }

        #endregion

        #region  ★★★★★　Control Event　★★★★★

        private void DataGridView1_CellMouseDoubleClick(object sender, DataGridViewCellMouseEventArgs e)
        {
            DataGridView1_KeyDown(sender, new KeyEventArgs(Keys.Enter));
        }

        private void DataGridView1_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.KeyCode == Keys.Enter)
            {
                if (DataGridView1.RowCount > 0)
                {

                    if (!IsReturnRow)
                    {
                        ReturnValue = this.DataGridView1[ReturnField, this.DataGridView1.CurrentCell.RowIndex].Value.ToString();     //Cell値
                    }
                    else
                    {
                        m_CurrentRow.Clear();
                        foreach (DataGridViewCell cell in DataGridView1.CurrentRow.Cells) { m_CurrentRow.Add(CConvert.ToString(cell.Value)); }
                    }
                    //画面を閉じる
                    this.Close();
                }
            }
            else if (e.KeyCode == Keys.Tab)
            {
                e.Handled = true;
                txtFilter.Focus();
            }
        }

        private void TxtFilter_KeyDown(object sender, KeyEventArgs e)
        {
            //Enterキー入力の場合
            if (e.KeyCode == Keys.Enter)
            {
                //DataGridView1へフォーカス移動
                DataGridView1.Focus();
            }
        }

        private void TxtFilter_Enter(object sender, EventArgs e)
        {
            txtFilter.BackColor = Color.LemonChiffon;
        }

        private void TxtFilter_Leave(object sender, EventArgs e)
        {
            txtFilter.BackColor = Color.White;
        }

        private void TxtFilter_TextChanged(object sender, EventArgs e)
        {
            // フィルター条件を判別
            if (txtFilter.Text.Length == 0 || SearchField.Length == 0)
            {
                //フィルタ条件無し(全てを表示)
                DtView.RowFilter = string.Empty;
            }
            else
            {
                //フィルタ条件指定
                DtView.RowFilter = $"{SearchField} LIKE '%{txtFilter.Text}%'";
            }
            // データを表示
            this.DataGridView1.DataSource = DtView;
        }


        #endregion

        #region  ★★★★★　Private Function　★★★★★

        /// <summary>
        /// ValidateInput
        /// </summary>
        private bool ValidateInput()
        {
            if (IsReturnRow) { return true; }
            if (Data.Rows.Count == 0) { return false; }
            if (Data.Columns[SearchField].DataType != typeof(string)) { return false; }
            return true;
        }

        #endregion

        #region  ★★★★★　Public Function　★★★★★

        public static List<string> ExecuteForRow(Control owner, DataTable data, Style style, Size size, string returnField, string searchField, List<int> colWidth)
        {
            using (DataSelector form = new DataSelector(owner))
            {
                form.CurStyle = style;
                if (!size.Equals(Size.Empty)) { form.Size = size; }
                if (returnField.Length > 0) { form.ReturnField = returnField; }
                if (searchField.Length > 0) { form.SearchField = searchField; }
                if (colWidth != null) { form.ColWidth = colWidth; }
                form.Data = data;
                form.IsReturnRow = true;
                form.ShowDialog();
                return form.SelecetdItem;
            }

        }

        /// <summary>
        /// 一覧表示
        /// </summary>
        /// <returns></returns>
        public static string Execute(Control owner, DataTable data)
        {
            return Execute(owner, data, Size.Empty);
        }

        public static string Execute(Control owner, DataTable data, Size size)
        {
            return Execute(owner, data, size, string.Empty, string.Empty, null, Style.None);
        }

        public static string Execute(Control owner, DataTable data,  Size size, string returnField, string searchField, List<int> colWidth, Style style)
        {
            string result = string.Empty;
            using (DataSelector form = new DataSelector(owner))
            {
                form.CurStyle = style;
                if (!size.Equals(Size.Empty)) { form.Size = size; }
                if (returnField.Length > 0) { form.ReturnField = returnField; }
                if (searchField.Length > 0) { form.SearchField = searchField; }
                if (colWidth != null) { form.ColWidth = colWidth; }
                form.Data = data;
                form.ShowDialog();
                if (form.ReturnValue.Length > 0)
                {
                    result = form.ReturnValue;
                }
            }
            return result;
        }

        #endregion
    }
}