using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace LB_VisionProcesses.Communicators.SiemensS7
{
    public partial class ConfigForm : Form
    {
        private PlcConfig config;
        private BindingSource bindingSource;
        private string strPath = string.Empty;
        public ConfigForm(PlcConfig existingConfig, string strPath)
        {
            InitializeComponent();
            config = existingConfig;
            SetupBindings();
            dgvSignals.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.Fill;
            dgvSignals.ForeColor = Color.Black;
            this.strPath = strPath;
            //dgvSignals.AutoSizeColumnsMode = DataGridViewAutoSizeColumnsMode.AllCells;
        }

        private void SetupBindings()
        {
            // PLC 连接参数绑定
            txtIpAddress.DataBindings.Add("Text", config, nameof(config.PlcIpAddress));
            nudRack.DataBindings.Add("Value", config, nameof(config.Rack));
            nudSlot.DataBindings.Add("Value", config, nameof(config.Slot));

            // 手动配置 DataGridView 列（下拉框列）
            dgvSignals.AutoGenerateColumns = false;
            dgvSignals.Columns.Clear();

            var colName = new DataGridViewTextBoxColumn();
            colName.DataPropertyName = "SignalName";
            colName.HeaderText = "信号名称";
            colName.Width = 120;
            dgvSignals.Columns.Add(colName);

            var colArea = new DataGridViewComboBoxColumn();
            colArea.DataPropertyName = "Area";
            colArea.HeaderText = "存储区";
            colArea.Items.AddRange("DB", "I", "Q", "M");
            colArea.Width = 60;
            dgvSignals.Columns.Add(colArea);

            var colDbNum = new DataGridViewTextBoxColumn();
            colDbNum.DataPropertyName = "DbNumber";
            colDbNum.HeaderText = "DB号";
            colDbNum.Width = 60;
            dgvSignals.Columns.Add(colDbNum);

            var colByte = new DataGridViewTextBoxColumn();
            colByte.DataPropertyName = "ByteOffset";
            colByte.HeaderText = "字节偏移";
            colByte.Width = 80;
            dgvSignals.Columns.Add(colByte);

            var colBit = new DataGridViewTextBoxColumn();
            colBit.DataPropertyName = "BitOffset";
            colBit.HeaderText = "位偏移";
            colBit.Width = 80;
            dgvSignals.Columns.Add(colBit);

            var colType = new DataGridViewComboBoxColumn();
            colType.DataPropertyName = "DataType";
            colType.HeaderText = "数据类型";
            colType.Items.AddRange("Bool", "Byte", "Int", "DInt", "Real","String");
            colType.Width = 80;
            dgvSignals.Columns.Add(colType);

            // 绑定数据源
            bindingSource = new BindingSource();
            bindingSource.DataSource = config.Signals;
            dgvSignals.DataSource = bindingSource;

            // 添加校验事件（可选）
            dgvSignals.CellValueChanged += DgvSignals_CellValueChanged;
        }

        private void DgvSignals_CellValueChanged(object sender, DataGridViewCellEventArgs e)
        {
            if (e.RowIndex < 0) return;
            var row = dgvSignals.Rows[e.RowIndex];
            var signal = row.DataBoundItem as SignalConfig;
            if (signal == null) return;

            // 若 Area 不是 DB，自动将 DbNumber 置 0
            if (!signal.Area.Equals("DB", StringComparison.OrdinalIgnoreCase))
            {
                signal.DbNumber = 0;
                dgvSignals.InvalidateRow(e.RowIndex);
            }
        }

        private void btnAdd_Click(object sender, EventArgs e)
        {
            config.Signals.Add(new SignalConfig());
            bindingSource.ResetBindings(false);
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            if (dgvSignals.CurrentRow != null)
            {
                var signal = dgvSignals.CurrentRow.DataBoundItem as SignalConfig;
                if (signal != null)
                {
                    config.Signals.Remove(signal);
                    bindingSource.ResetBindings(false);
                }
            }
        }

        private void btnSave_Click(object sender, EventArgs e)
        {
            S7ConfigService.SaveConfig(config, this.strPath);
            this.DialogResult = DialogResult.OK;
            this.Close();
        }

        private void btnCancel_Click(object sender, EventArgs e)
        {
            this.DialogResult = DialogResult.Cancel;
            this.Close();
        }
    }

}