using System;
using System.Data;
using System.Windows.Forms;
using UAS_LabelMachine;

namespace UAS_LabelMachine.CustomControl
{
    public partial class BlurSearch : UserControl
    {
        DataHelper dh = new DataHelper();

        public delegate void OnTextChange(object sender, EventArgs e);

        public delegate void OnKeyDown(object sender, KeyEventArgs e);

        public event OnTextChange UserControlTextChanged;

        public event OnKeyDown UserKeyDown;

        string TableName1;

        string Field1;

        int ItemSelectIndex = 0;
        DataTable dt;

        public override string Text
        {
            get
            {
                return EnterTextBox.Text;
            }

            set
            {
                EnterTextBox.Text = value;
            }
        }

        public BlurSearch()
        {
            InitializeComponent();
        }

        public string TableName
        {
            get
            {
                return TableName1;
            }

            set
            {
                TableName1 = value;
            }
        }

        private string value;

        public string Field
        {
            get
            {
                return Field1;
            }

            set
            {
                Field1 = value;
            }
        }

        public string Condition
        {
            get
            {
                return condition;
            }

            set
            {
                condition = value;
            }
        }

        public string ValueField
        {
            get
            {
                return valueField;
            }

            set
            {
                valueField = value;
            }
        }

        public string Value
        {
            get
            {
                return value;
            }

            set
            {
                this.value = value;
            }
        }

        private string valueField;

        private string condition;

        private void TextBox_Leave(object sender, EventArgs e)
        {
            Height = EnterTextBox.Height;
            ListBox.Visible = false;
        }

        private void BlurSearch_Load(object sender, EventArgs e)
        {
            Height = EnterTextBox.Height;
            ListBox.Visible = false;
        }

        private void EnterTextBox_TextChanged(object sender, EventArgs e)
        {
            if (TableName1 != null && EnterTextBox.Focused)
            {
                string con = Field1 + " like '%" + EnterTextBox.Text + "%' and rownum<=5 ";
                if (condition != "" && condition != null)
                {
                    con = Field1 + " like '%" + EnterTextBox.Text + "%' and rownum<=5 and " + condition;
                }
                dt = dh.getFieldsDatasByCondition(TableName1, new string[] { Field1, valueField, "rownum" }, con.ToUpper());
                if (dt.Rows.Count > 0)
                {
                    ListBox.Items.Clear();
                    for (int i = 0; i < dt.Rows.Count; i++)
                    {
                        ListBox.Items.Add(dt.Rows[i][Field1]);
                    }
                    //每次数据查询之后将索引重置
                    ItemSelectIndex = 0;
                    ListBox.Height = ListBox.ItemHeight * (dt.Rows.Count + 1);
                    ListBox.Visible = true;
                    Height = ListBox.Height + EnterTextBox.Height;
                }
                if (dt.Rows.Count == 1)
                {
                    value = dt.Rows[0][valueField].ToString();
                }
            }
            else
            {
                ListBox.Visible = false;
                Height = EnterTextBox.Height;
            }
            UserControlTextChanged?.Invoke(sender, new EventArgs());
        }

        private void ListBox_Click(object sender, EventArgs e)
        {
            value = dt.Select("rownum=" + (ListBox.SelectedIndex + 1))[0][1].ToString();
            EnterTextBox.Text = ListBox.SelectedItem.ToString();
            ListBox.Visible = false;
            Height = EnterTextBox.Height;
        }

        private void EnterTextBox_KeyDown(object sender, KeyEventArgs e)
        {
            if (ListBox.Items.Count > 0)
            {
                if (e.KeyCode == Keys.Down || e.KeyCode == Keys.Up)
                {
                    switch (e.KeyCode)
                    {
                        case Keys.Down:
                            if (ListBox.Items.Count > ItemSelectIndex + 1)
                                ItemSelectIndex = ItemSelectIndex + 1;
                            break;
                        case Keys.Up:
                            if (ItemSelectIndex - 1 >= 0)
                                ItemSelectIndex = ItemSelectIndex - 1;
                            break;
                        default:
                            break;
                    }
                    ListBox.SelectedIndex = ItemSelectIndex;
                }
                if (e.KeyCode == Keys.Enter)
                {
                    try
                    {
                        EnterTextBox.Text = ListBox.SelectedItem.ToString();
                        ListBox.Visible = false;
                        Height = EnterTextBox.Height;
                    }
                    catch (Exception)
                    {
                    }
                }
            }
            UserKeyDown?.Invoke(sender, e);
        }

        private void EnterTextBox_Enter(object sender, EventArgs e)
        {
            string con = Field1 + " like '%" + EnterTextBox.Text + "%' and rownum<=10 ";
            if (condition != "" && condition != null)
            {
                con = Field1 + " like '%" + EnterTextBox.Text + "%' and rownum<=10 and " + condition;
            }
            dt = dh.getFieldsDatasByCondition(TableName1, new string[] { Field1, valueField, "rownum" }, con.ToUpper());
            if (dt.Rows.Count > 0)
            {
                ListBox.Items.Clear();
                for (int i = 0; i < dt.Rows.Count; i++)
                {
                    ListBox.Items.Add(dt.Rows[i][Field1]);
                }
                //每次数据查询之后将索引重置
                ItemSelectIndex = 0;
                ListBox.Height = ListBox.ItemHeight * (dt.Rows.Count + 1);
                ListBox.Visible = true;
                Height = ListBox.Height + EnterTextBox.Height;
            }
        }

        private void EnterTextBox_Leave(object sender, EventArgs e)
        {
            //ListBox.Visible = false;
        }

        private void BlurSearch_Leave(object sender, EventArgs e)
        {
            ListBox.Height = 0;
            ListBox.Visible = false;
            Height = ListBox.Height + EnterTextBox.Height;
        }
    }
}