using ClosedXML.Excel;
using Logger;
using Microsoft.Win32;
using Model;
using Model.Entity;
using Model.Models;
using Service.Interface;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Input;
using UIShare.ViewModelBase;

namespace ExportModule.ViewModels
{
    public class ExportViewModel : NavigateViewModelBase, IRegionMemberLifetime, IDisposable
    {
        #region 属性
        public bool KeepAlive => true;

        private ObservableCollection<TestReportModel> _testReportModelList = new();

        public ObservableCollection<TestReportModel> TestReportModelList
        {
            get { return _testReportModelList; }
            set { SetProperty(ref _testReportModelList, value); }
        }

        private DateTime? _startTime;
        public DateTime? StartTime
        {
            get => _startTime;
            set => SetProperty(ref _startTime, value);
        }

        private DateTime? _endTime;
        public DateTime? EndTime
        {
            get => _endTime;
            set => SetProperty(ref _endTime, value);
        }

        private string _selectedScope = "全部";
        public string SelectedScope
        {
            get => _selectedScope;
            set => SetProperty(ref _selectedScope, value);
        }

        public ObservableCollection<string> ScopeOptions { get; } = new()
        {
            "全部",
            "TestCell1", "TestCell2", "TestCell3", "TestCell4",
            "TestCell5", "TestCell6", "TestCell7", "TestCell8"
        };

        private string _statusMessage = "就绪";
        public string StatusMessage
        {
            get => _statusMessage;
            set => SetProperty(ref _statusMessage, value);
        }

        private int _totalCount;
        public int TotalCount
        {
            get => _totalCount;
            set => SetProperty(ref _totalCount, value);
        }

        private TestReportModel? _selectedTestReport;
        public TestReportModel? SelectedTestReport
        {
            get => _selectedTestReport;
            set => SetProperty(ref _selectedTestReport, value);
        }
        #endregion

        #region 命令
        public ICommand LoadedCommand { get; }
        public ICommand QueryCommand { get; }
        public ICommand ExportCommand { get; }
        #endregion

        #region 私有字段
        private readonly ITestReportService _testReportService;
        #endregion

        public ExportViewModel(IContainerProvider containerProvider) : base(containerProvider)
        {
            _testReportService = containerProvider.Resolve<ITestReportService>();

            LoadedCommand = new AsyncDelegateCommand(OnLoad);
            QueryCommand = new AsyncDelegateCommand(OnQuery);
            ExportCommand = new AsyncDelegateCommand(OnExport);
        }

        #region 命令处理

        /// <summary>
        /// 加载全部（无筛选条件）
        /// </summary>
        private async Task OnLoad()
        {
            var result = await _testReportService.GetFilterList();
            if (result.IsSuccess)
            {
                TestReportModelList = new ObservableCollection<TestReportModel>(result.Data ?? new List<TestReportModel>());
                TotalCount = TestReportModelList.Count;
                ShowInfoMessageBox($"加载完成，共 {TotalCount} 条记录", () => { });
            }
            else
            {
                TestReportModelList = new ObservableCollection<TestReportModel>();
                TotalCount = 0;
                ShowErrorMessageBox($"加载失败：{result.Msg}", () => { });
                LoggerHelper.Error(result.Msg);
            }
        }

        /// <summary>
        /// 查询（根据开始日期、结束日期、台架名称筛选）
        /// </summary>
        private async Task OnQuery()
        {
            // 处理结束日期：若用户只选了日期没选时间，默认到当天末尾
            DateTime? queryEnd = EndTime;
            if (queryEnd.HasValue)
            {
                queryEnd = queryEnd.Value.Date.AddDays(1).AddSeconds(-1);
            }

            string? scope = SelectedScope == "全部" ? null : SelectedScope;

            var result = await _testReportService.GetFilterList(StartTime, queryEnd, scope);
            if (result.IsSuccess)
            {
                TestReportModelList = new ObservableCollection<TestReportModel>(result.Data ?? new List<TestReportModel>());
                TotalCount = TestReportModelList.Count;
                ShowInfoMessageBox($"查询完成，共 {TotalCount} 条记录", () => { });
            }
            else
            {
                TestReportModelList = new ObservableCollection<TestReportModel>();
                TotalCount = 0;
                ShowErrorMessageBox($"查询失败：{result.Msg}", () => { });
                LoggerHelper.Error(result.Msg);
            }
        }

        /// <summary>
        /// 导出 Excel：根据用户在表格中选中的 TestReportModel.TestRoundId 查询并导出完整步骤数据
        /// </summary>
        private async Task OnExport()
        {
            if (SelectedTestReport == null)
            {
                ShowErrorMessageBox("请先在列表中选择一条测试记录。", () => { });
                return;
            }

            StatusMessage = "正在查询导出数据...";
            var entityResult = await _testReportService.GetByTestRoundIdAsync(SelectedTestReport.TestRoundId);
            if (!entityResult.IsSuccess || entityResult.Data == null || entityResult.Data.Count == 0)
            {
                ShowErrorMessageBox("未找到该测试记录的详细步骤数据。", () => { });
                return;
            }

            var dialog = new SaveFileDialog
            {
                Filter = "Excel 工作簿 (*.xlsx)|*.xlsx|所有文件 (*.*)|*.*",
                DefaultExt = ".xlsx",
                FileName = $"测试报告_{SelectedTestReport.Scope}_{SelectedTestReport.StartTime:yyyyMMdd_HHmmss}.xlsx"
            };

            if (dialog.ShowDialog() != true) return;

            var entities = entityResult.Data;
            StatusMessage = $"正在导出 {entities.Count} 条步骤记录...";
            await Task.Run(() => ExportToExcel(dialog.FileName, entities));
            ShowInfoMessageBox($"导出完成，共 {entities.Count} 条步骤记录，已保存至：{dialog.FileName}", () => { });
        }

        #endregion

        #region 辅助方法

        private static void ExportToExcel(string filePath, List<TestReportEntity> entities)
        {
            using var workbook = new XLWorkbook();
            var ws = workbook.Worksheets.Add("测试报告");

            // 表头
            string[] headers = {
                "Id", "CreateTime", "TestRoundId", "Scope", "FileName",
                "StepIndex", "StepName", "StepType", "MethodName", "MethodFullName",
                "Result", "RunTimeMs", "OutputValue", "Depth", "IsErrorStep", "LoopRemaining"
            };

            for (int c = 0; c < headers.Length; c++)
            {
                ws.Cell(1, c + 1).Value = headers[c];
            }

            // 标题行样式
            var headerRange = ws.Range(1, 1, 1, headers.Length);
            headerRange.Style.Font.Bold = true;
            headerRange.Style.Fill.BackgroundColor = XLColor.FromArgb(0xECEFF4);
            headerRange.Style.Border.OutsideBorder = XLBorderStyleValues.Thin;
            headerRange.Style.Border.InsideBorder = XLBorderStyleValues.Thin;

            // 填充数据
            for (int i = 0; i < entities.Count; i++)
            {
                var e = entities[i];
                int row = i + 2;

                ws.Cell(row, 1).Value = e.Id;
                ws.Cell(row, 2).Value = e.CreateTime.ToString("yyyy-MM-dd HH:mm:ss");
                ws.Cell(row, 3).Value = e.TestRoundId.ToString();
                ws.Cell(row, 4).Value = e.Scope ?? "";
                ws.Cell(row, 5).Value = e.FileName ?? "";
                ws.Cell(row, 6).Value = e.StepIndex;
                ws.Cell(row, 7).Value = e.StepName ?? "";
                ws.Cell(row, 8).Value = e.StepType ?? "";
                ws.Cell(row, 9).Value = e.MethodName ?? "";
                ws.Cell(row, 10).Value = e.MethodFullName ?? "";
                ws.Cell(row, 11).Value = e.Result;
                ws.Cell(row, 12).Value = e.RunTimeMs;
                ws.Cell(row, 13).Value = e.OutputValue ?? "";
                ws.Cell(row, 14).Value = e.Depth;
                ws.Cell(row, 15).Value = e.IsErrorStep ? "是" : "否";
                ws.Cell(row, 16).Value = e.LoopRemaining;

                // 数据行边框
                var dataRange = ws.Range(row, 1, row, headers.Length);
                dataRange.Style.Border.OutsideBorder = XLBorderStyleValues.Thin;
                dataRange.Style.Border.InsideBorder = XLBorderStyleValues.Thin;
            }

            ws.Columns().AdjustToContents();
            workbook.SaveAs(filePath);
        }

        #endregion

        #region 生命周期

        public override void OnNavigatedTo(NavigationContext navigationContext)
        {
        }

        public void Dispose()
        {
        }

        #endregion
    }
}