using Newtonsoft.Json;
using StandardScene.InterLock; // 数据类型采用 TrafficInterlockMission 中的 TrafficArea
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Windows.Forms;

namespace LoopViewerApp
{
    public partial class TrafficInterlockViewer : Form
    {
        /// <summary>-1 表示新增模式；>=0 表示正在编辑对应索引</summary>
        private int _editingIndex = -1;

        /// <summary>选中行变化时是否允许加载到编辑区（避免在保存/取消时重复刷新）</summary>
        private bool _allowLoadFromSelection = true;

        public TrafficInterlockViewer()
        {
            InitializeComponent();

            if (LicenseManager.UsageMode == LicenseUsageMode.Designtime)
                return;

            try
            {
                RenderListView();
                ClearPanelInputs();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"TrafficInterlockViewer init error: {ex}");
            }
        }

        #region 表格绘制（只读展示）

        private void lstTasks_DrawColumnHeader(object sender, DrawListViewColumnHeaderEventArgs e)
        {
            try
            {
                // 与 LoopViewer 一致：深蓝表头 + 白色加粗字体
                using (var backBrush = new SolidBrush(Color.FromArgb(63, 81, 181)))
                using (var textBrush = new SolidBrush(Color.White))
                using (var font = new Font("微软雅黑", 9, FontStyle.Bold))
                {
                    e.Graphics.FillRectangle(backBrush, e.Bounds);
                    var sf = new StringFormat { LineAlignment = StringAlignment.Center, Alignment = StringAlignment.Near };
                    var rect = e.Bounds;
                    rect.Inflate(-8, 0);
                    e.Graphics.DrawString(e.Header.Text, font, textBrush, rect, sf);
                    using (var pen = new Pen(Color.FromArgb(200, 200, 200)))
                        e.Graphics.DrawLine(pen, e.Bounds.Left, e.Bounds.Bottom - 1, e.Bounds.Right, e.Bounds.Bottom - 1);
                }
            }
            catch
            {
                e.DrawBackground();
                e.DrawText();
            }
        }

        private void lstTasks_DrawItem(object sender, DrawListViewItemEventArgs e)
        {
            // 由 DrawSubItem 统一绘制
        }

        private void lstTasks_DrawSubItem(object sender, DrawListViewSubItemEventArgs e)
        {
            try
            {
                bool selected = e.Item.Selected;
                Rectangle bounds = e.Bounds;
                // 与 LoopViewer 一致：选中行蓝色强调，交替行背景，深灰文字
                Color selectedBack = Color.FromArgb(0, 120, 215);
                Color selectedFore = Color.White;
                Color evenBack = Color.White;
                Color oddBack = Color.FromArgb(250, 251, 253);
                Color normalFore = Color.FromArgb(33, 33, 33);

                if (selected)
                {
                    using (var selBrush = new SolidBrush(selectedBack))
                        e.Graphics.FillRectangle(selBrush, bounds);
                }
                else
                {
                    using (var back = new SolidBrush(e.ItemIndex % 2 == 0 ? evenBack : oddBack))
                        e.Graphics.FillRectangle(back, bounds);
                }

                string text = e.SubItem?.Text ?? string.Empty;
                Color fore = selected ? selectedFore : normalFore;
                var textRect = bounds;
                textRect.Inflate(-6, 0);
                using (var font = new Font("微软雅黑", 9))
                    TextRenderer.DrawText(e.Graphics, text, font, textRect, fore, TextFormatFlags.Left | TextFormatFlags.VerticalCenter);
            }
            catch
            {
                e.DrawBackground();
                e.DrawText();
            }
        }

        #endregion

        #region 列表渲染与保存

        private void RenderListView()
        {
            try
            {
                if (lstTasks == null) return;
                _allowLoadFromSelection = false;
                lstTasks.BeginUpdate();
                lstTasks.Items.Clear();
                foreach (var a in TrafficInterlockMission.TrafficAreaList)
                {
                    var stationStr = a.SiteList != null && a.SiteList.Count > 0 ? string.Join(", ", a.SiteList) : "";

                    var lvi = new ListViewItem(new[]
                    {
                        a.AreaName ?? "",
                        stationStr,
                        a.ControllerName ?? "",
                        a.IsOccupy ? "是" : "否",
                        a.IsEnable ? "是" : "否"
                    });

                    lstTasks.Items.Add(lvi);
                }
                lstTasks.EndUpdate();
                _allowLoadFromSelection = true;
            }
            catch (Exception ex)
            {
                _allowLoadFromSelection = true;
                System.Diagnostics.Debug.WriteLine($"RenderListView failed: {ex}");
            }
        }

        private void SaveToConfig()
        {
            try
            {
                string configPath = Path.Combine(Application.StartupPath, "Config", "traffic.json");
                string dir = Path.GetDirectoryName(configPath);
                if (!string.IsNullOrEmpty(dir) && !Directory.Exists(dir))
                    Directory.CreateDirectory(dir);
                File.WriteAllText(configPath, JsonConvert.SerializeObject(TrafficInterlockMission.TrafficAreaList, Formatting.Indented));
            }
            catch (Exception ex)
            {
                MessageBox.Show("保存失败：" + ex.Message);
            }
        }

        #endregion

        #region 点击表格行 → 编辑区展示该行数据

        private void lstTasks_SelectedIndexChanged(object sender, EventArgs e)
        {
            if (!_allowLoadFromSelection || lstTasks == null || lstTasks.SelectedIndices.Count == 0) return;
            int idx = lstTasks.SelectedIndices[0];
            if (idx < 0 || idx >= TrafficInterlockMission.TrafficAreaList.Count) return;
            _editingIndex = idx;
            LoadAreaToPanel(TrafficInterlockMission.TrafficAreaList[idx]);
        }

        #endregion

        #region 编辑区：加载 / 清空

        private void LoadAreaToPanel(TrafficArea a)
        {
            if (a == null) return;
            try
            {
                if (lblEditingHint != null)
                    lblEditingHint.Text = $"编辑：{a.AreaName}";
                if (txtAreaName != null)
                    txtAreaName.Text = a.AreaName ?? "";
                if (txtStationIds != null)
                    txtStationIds.Text = a.SiteList != null && a.SiteList.Count > 0
                        ? string.Join(", ", a.SiteList)
                        : "";
                if (txtControlRight != null)
                    txtControlRight.Text = a.ControllerName ?? "";
                if (chkIsOccupied != null)
                    chkIsOccupied.Checked = a.IsOccupy;
                if (chkIsEnabled != null)
                    chkIsEnabled.Checked = a.IsEnable;
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"LoadAreaToPanel error: {ex}");
            }
        }

        private void ClearPanelInputs()
        {
            try
            {
                _editingIndex = -1;
                if (lblEditingHint != null)
                    lblEditingHint.Text = "新增区域";
                if (txtAreaName != null)
                    txtAreaName.Text = "";
                if (txtStationIds != null)
                    txtStationIds.Text = "";
                if (txtControlRight != null)
                    txtControlRight.Text = "";
                if (chkIsOccupied != null)
                    chkIsOccupied.Checked = false;
                if (chkIsEnabled != null)
                    chkIsEnabled.Checked = true;
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"ClearPanelInputs error: {ex}");
            }
        }

        #endregion

        #region 解析站点集合字符串 "1,2,3" -> List<int>

        private static List<int> ParseStationIds(string text)
        {
            var list = new List<int>();
            if (string.IsNullOrWhiteSpace(text)) return list;
            foreach (var part in text.Split(new[] { ',', ';', ' ', '\t' }, StringSplitOptions.RemoveEmptyEntries))
            {
                if (int.TryParse(part.Trim(), out int id))
                    list.Add(id);
            }
            return list;
        }

        #endregion

        #region 按钮：保存 / 刷新 / 新增 / 删除

        private void btnSave_Click(object sender, EventArgs e)
        {
            try
            {
                string areaName = txtAreaName?.Text?.Trim() ?? "";
                if (string.IsNullOrEmpty(areaName))
                {
                    MessageBox.Show("请输入区域名称。");
                    return;
                }

                var stationIds = ParseStationIds(txtStationIds?.Text ?? "");
                string controlRight = txtControlRight?.Text?.Trim() ?? "";
                bool isOccupied = chkIsOccupied?.Checked ?? false;
                bool isEnabled = chkIsEnabled?.Checked ?? true;

                if (_editingIndex >= 0 && _editingIndex < TrafficInterlockMission.TrafficAreaList.Count)
                {
                    lock (TrafficInterlockMission.TrafficAreaList)
                    {
                        var existing = TrafficInterlockMission.TrafficAreaList[_editingIndex];
                        existing.AreaName = areaName;
                        existing.SiteList = stationIds;
                        existing.ControllerName = controlRight;
                        existing.IsOccupy = isOccupied;
                        existing.IsEnable = isEnabled;
                    }
                }
                else
                {
                    lock (TrafficInterlockMission.TrafficAreaList)
                    {
                        TrafficInterlockMission.TrafficAreaList.Add(new TrafficArea
                        {
                            AreaName = areaName,
                            SiteList = stationIds,
                            ControllerName = controlRight,
                            IsOccupy = isOccupied,
                            IsEnable = isEnabled
                        });
                    }
                }

                SaveToConfig();
                RenderListView();
                ClearPanelInputs();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"btnSave_Click error: {ex}");
                MessageBox.Show("操作失败：" + ex.Message);
            }
        }

        private void btnRefresh_Click(object sender, EventArgs e)
        {
            try
            {
                RenderListView();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"btnRefresh_Click error: {ex}");
            }
        }

        private void btnNew_Click(object sender, EventArgs e)
        {
            if (lstTasks != null)
                lstTasks.SelectedIndices.Clear();
            ClearPanelInputs();
            // 进入新增模式：填写下方编辑区后点击“保存”即可新增一条数据
        }

        private void btnDelete_Click(object sender, EventArgs e)
        {
            try
            {
                if (lstTasks == null || lstTasks.SelectedIndices.Count == 0)
                {
                    MessageBox.Show("请先在上方列表中选择要删除的区域。");
                    return;
                }

                var dialogResult = MessageBox.Show(
                    "确定要删除选中的区域吗？",
                    "确认删除",
                    MessageBoxButtons.YesNo,
                    MessageBoxIcon.Warning);

                if (dialogResult != DialogResult.Yes)
                    return;

                var indices = lstTasks.SelectedIndices.Cast<int>()
                    .OrderByDescending(i => i)
                    .ToList();

                lock (TrafficInterlockMission.TrafficAreaList)
                {
                    foreach (var idx in indices)
                    {
                        if (idx >= 0 && idx < TrafficInterlockMission.TrafficAreaList.Count)
                        {
                            TrafficInterlockMission.TrafficAreaList.RemoveAt(idx);
                        }
                    }
                }

                SaveToConfig();
                RenderListView();
                ClearPanelInputs();
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine($"btnDelete_Click error: {ex}");
                MessageBox.Show("删除失败：" + ex.Message);
            }
        }

        #endregion
    }
}