using System;
using System.Collections.Generic;
using System.Threading;
using System.Windows;
using Plugins.Vm.Models;
using Plugins.Vm.Views;
using TeamAAS.FlowEditor.Execution;
using TeamAAS.FlowEditor.Models;
using TeamAAS.FlowEditor.Plugins;

namespace Plugins.Vm
{
    /// <summary>
    /// VM 图像显示节点：把上游输出的图层/图像显示到指定画面框（视觉窗体）；每个显示项可独立
    /// 链接 OK/NG 结果（可不链接）驱动该画面框状态圆点。镜像 VppDisplayPlugin。
    /// </summary>
    [Serializable]
    [Plugin("VM图像显示", PluginCategory.Vm模块, typeof(VmDisplayModel),
        "Monitor",
        Description = "把图层/图像显示到主页画面框；每项可独立链接 OK/NG 结果驱动状态圆点（可不链接）")]
    public class VmDisplayPlugin : BasePlugin<VmDisplayModel>
    {
        public override List<OutputField> DeclareOutputs()
        {
            var list = new List<OutputField>
            {
                new OutputField("显示画面数", typeof(int)),
                new OutputField("结果", typeof(bool)),
            };
            foreach (var kv in BuildItemKeys(Model))
                list.Add(new OutputField(kv.Key, typeof(object)));
            return list;
        }

        /// <summary>
        /// 依据显示项列表生成稳定的“输出键 → 显示项”映射：键优先取目标画面名，重名/空名时追加序号去重。
        /// DeclareOutputs 与 PluginRun 共用，保证键一致。
        /// </summary>
        private static List<KeyValuePair<string, VmDisplayItem>> BuildItemKeys(VmDisplayModel model)
        {
            var map = new List<KeyValuePair<string, VmDisplayItem>>();
            if (model?.DisplayItems == null) return map;
            var used = new HashSet<string>();
            for (int i = 0; i < model.DisplayItems.Count; i++)
            {
                var item = model.DisplayItems[i];
                if (item == null) continue;
                string key = string.IsNullOrWhiteSpace(item.FrameName) ? $"画面{item.FrameNo}" : item.FrameName;
                string unique = key;
                int dup = 2;
                while (!used.Add(unique)) unique = $"{key}({dup++})";
                map.Add(new KeyValuePair<string, VmDisplayItem>(unique, item));
            }
            return map;
        }

        public override NodeRunStatus PluginRun(CancellationToken token, out Dictionary<string, object> results)
        {
            results = new Dictionary<string, object>();
            try
            {
                var windows = UCDispVm.Instance.vmWindow;
                int displayed = 0;
                Log(3, $"开始显示，显示项 {Model.DisplayItems?.Count ?? 0} 个，可用画面框 {windows?.Count ?? 0} 个");

                foreach (var kv in BuildItemKeys(Model))
                {
                    var item = kv.Value;
                    results[kv.Key] = null;

                    if (item.FrameNo < 1 || windows == null || windows.Count < item.FrameNo)
                    {
                        Log(2, $"显示项[{kv.Key}] 目标画面序号 {item.FrameNo} 无效或画面框不足，已跳过", TeamAAS.LogLevel.Warning);
                        continue;
                    }
                    var win = windows[item.FrameNo - 1];
                    if (win == null)
                    {
                        Log(2, $"显示项[{kv.Key}] 画面框为空，已跳过", TeamAAS.LogLevel.Warning);
                        continue;
                    }

                    object value = GetResolve(item.Source);
                    results[kv.Key] = value;
                    var toShow = value;
                    Application.Current?.Dispatcher.Invoke(() => win.RefreshImage(toShow));
                    displayed++;
                    Log(4, $"显示项[{kv.Key}] → 画面{item.FrameNo}，类型 {(value?.GetType().Name ?? "null")}");

                    if (!string.IsNullOrWhiteSpace(item.OkNgBinding?.Formula))
                    {
                        bool ok = GetValue<bool>(item.OkNgBinding);
                        win.SetLable(ok ? VmResultType.OK : VmResultType.NG);
                        Log(4, $"显示项[{kv.Key}] OK/NG = {(ok ? "OK" : "NG")}");
                    }
                }

                results["显示画面数"] = displayed;
                results["结果"] = true;
                Log(2, $"显示完成，共刷新 {displayed} 个画面");
                return NodeRunStatus.Success;
            }
            catch (Exception ex)
            {
                results["Error"] = ex.Message;
                results["结果"] = false;
                Log(1, $"VM图像显示异常: {ex.Message}", TeamAAS.LogLevel.Error);
                return NodeRunStatus.Failed;
            }
        }
    }
}