// #define FIX_PLAN_ITEM // 测试环境对OrderBlockPlanItem表进行修复时使用

using System.Text;
using MesETL.App;
using MesETL.App.Services;
using MesETL.App.Services.ETL;
using MesETL.App.Cache;
using MesETL.App.Const;
using MesETL.App.HostedServices;
using MesETL.App.HostedServices.Abstractions;
using MesETL.App.Options;
using MesETL.App.Services.ErrorRecorder;
using MesETL.App.Services.Loggers;
using MesETL.App.Services.Seq;
using MesETL.Shared.Compression;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.Extensions.Logging;
using Serilog;
using Serilog.Events;
using DumpDataHelper = MesETL.App.Helpers.DumpDataHelper;

await RunProgram();
return;

async Task RunProgram()
{
    ThreadPool.SetMaxThreads(200, 200);
    var host = Host.CreateApplicationBuilder(args);
    host.Configuration.AddJsonFile(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "appsettings.json"), false, false);
    host.Configuration.AddCommandLine(args, new Dictionary<string, string>
    {
        { "-d", "Input:InputDir" },
        { "--InputDir", "Input:InputDir" },
        { "-s", "Output:ConnectionString" },
        { "--ConnectionString", "Output:ConnectionString" },
        { "-r", "RedisCache:Configuration" },
        { "--Redis", "RedisCache:Configuration" },
        { "-g", "TenantDb:UseDbGroup" },
        { "--UseDbGroup", "TenantDb:UseDbGroup" },
        { "-c", "Command" },
        { "--Command", "Command" }
    }); 

    var inputOptions = host.Configuration.GetRequiredSection("Input").Get<DataInputOptions>() 
                       ?? throw new ApplicationException("缺少Input配置");

    var transformOptions = host.Configuration.GetRequiredSection("Transform").Get<DataTransformOptions>()
                        ?? throw new ApplicationException("缺少Transform配置");

    var outputOptions = host.Configuration.GetRequiredSection("Output").Get<DatabaseOutputOptions>() 
                        ?? throw new ApplicationException("缺少Output配置");

    var redisSection = host.Configuration.GetRequiredSection("RedisCache");
    var redisOptions = redisSection.Get<RedisCacheOptions>() ?? throw new ApplicationException("缺少RedisCache配置");

    var tenantDbSection = host.Configuration.GetRequiredSection("TenantDb");
    var tenantDbOptions = new TenantDbOptions()
    {
        TenantKey = tenantDbSection.GetValue<string>(nameof(TenantDbOptions.TenantKey)) ?? throw new ApplicationException("分库配置缺少分库键TenantKey"),
        UseDbGroup = tenantDbSection.GetValue<string>(nameof(TenantDbOptions.UseDbGroup)) ?? throw new ApplicationException("分库配置缺少使用分库组UseDbGroup")
    };
    tenantDbOptions.DbGroup = tenantDbSection.GetRequiredSection($"DbGroups:{tenantDbOptions.UseDbGroup}").Get<Dictionary<string,int>>()
        ?? throw new ApplicationException($"分库配置无法解析分库组{tenantDbOptions.UseDbGroup}，请检查配置");
    
    host.Services.Configure<TenantDbOptions>(options =>
    {
        options.TenantKey = tenantDbOptions.TenantKey;
        options.UseDbGroup = tenantDbOptions.UseDbGroup;
        options.DbGroup = tenantDbOptions.DbGroup;
    });
    host.Services.Configure<RedisCacheOptions>(redisSection);

    var oldestTime = DateTime.ParseExact(transformOptions.CleanDate, "yyyyMM", System.Globalization.DateTimeFormatInfo.InvariantInfo);
    var oldestTimeInt_yyyyMM = int.Parse(transformOptions.CleanDate);
    var oldestTimeInt_yyMM = int.Parse(transformOptions.CleanDate[2..]);
    
    // 输入配置
    host.Services.Configure<DataInputOptions>(options =>
    {
        options.InputDir = inputOptions.InputDir ?? throw new ApplicationException("未配置输入目录");
        options.UseMock = inputOptions.UseMock;
        options.TableMockConfig = inputOptions.TableMockConfig;
        options.MockCountMultiplier = inputOptions.MockCountMultiplier;
        options.TableIgnoreList = inputOptions.TableIgnoreList;
        options.TableOrder = inputOptions.TableOrder;
        
        // 配置文件元数据构建方法
        options.FileInputMetaBuilder = DumpDataHelper.MyDumperFileInputMetaBuilder;
        
        // 配置表输入完成事件
        options.OnTableInputCompleted = null;

        // 配置表模拟数据
        options.TableMockConfig = new Dictionary<string, TableMockConfig>
            { };
    });

    host.Services.Configure<DataTransformOptions>(options =>
    {
        static string CalculateShardKeyByOrderNo(ReadOnlySpan<char> orderNo)
            => $"{orderNo[2..6]}0";
        
        options.StrictMode = transformOptions.StrictMode;
        options.EnableFilter = transformOptions.EnableFilter;
        options.EnableReplacer = transformOptions.EnableReplacer;
        options.EnableReBuilder = transformOptions.EnableReBuilder;
        
        // order_block_plan_item和order_package_item表不导入，根据order_item数据直接重建
        
        // 数据清理
        options.RecordFilter = async context => // TODO: OPT: oldestTime等外部变量会产生闭包
        {
            var record = context.Record;
            switch (record.TableName)
            {
                // 清理CreateTime < 202401的
                case TableNames.OrderBlockPlan:
                {
                    var creationTime = DateTime.Parse(record["CreateTime"].AsSpan().Trim(['"', '\'']));
                    if (creationTime < oldestTime)
                    {
                        return false;
                    }
                    break;
                }
                // 忽略OrderBlockPlanItem
                case TableNames.OrderBlockPlanItem:
                {
                    return false;
                }
                // 清理(Status != 0 || Deleted = 1) && ID前四位 < 2401的
                case TableNames.OrderScrapBoard:
                {
                    var status = record["Status"].AsSpan();
                    var deleted = record["Deleted"].AsSpan();
                    var idPref = int.Parse(record["ID"].AsSpan()[..4]);
                    if ((status is not "0" || deleted is "1") && idPref < oldestTimeInt_yyMM)
                    {
                        return false;
                    }
                    break;
                }
                // 清理OrderNo < 202401的
                case TableNames.SimplePackage:
                {
                    var orderNo = int.Parse(record["OrderNo"].AsSpan()[..4]);
                    if (orderNo < oldestTimeInt_yyMM)
                    {
                        return false;
                    }
                    break;
                }
                // 清理CreateTime < 202401的
                case TableNames.SimplePlanOrder:
                {
                    var creationTime = DateTime.Parse(record["CreateTime"].AsSpan().Trim(['"', '\'']));
                    if (creationTime < oldestTime)
                    {
                        return false;
                    }
                    break;
                }
                default: break;
            }

            return true;
        };
        
        // 数据替换
        /*
         * 空数据处理：
         * 某些列生产库为可空，而测试库变为了不可空，则需要根据列的类型对这些列做单独处理
         * int或任何非无符号整型 -> -1
         * varchar -> ''（空字符串）
         * datetime -> '1000-01-01'（datetime最小值）
         * text -> 0 （16进制0，MyDumper中的text是为16进制）
         */
        const string DefaultInt = "0";
        const string DefaultStr = "''";
        const string DefaultDateTime = "'1000-01-01'";
        const string DefaultText = "0";
        
        options.RecordModify = async context =>
        {
            void ReplaceIfMyDumperNull(DataRecord record, string fieldName, string replaceValue)
            {
                if (record[fieldName] is ConstVar.MyDumperNull)
                {
                    context.Logger.LogWarning("发现不可空的字段为空({TableName}.{FieldName})，填充默认值: {DefaultValue}", 
                        record.TableName, fieldName, replaceValue);
                    record[fieldName] = replaceValue;
                }
            }
            
            var record = context.Record;
            var cache = context.Cacher;
            switch (record.TableName)
            {
                // 重构Data列二进制数据
                case TableNames.OrderBoxBlock:
                {
                    var data = record["Data"];
                    if (data is not ConstVar.MyDumperNull and ConstVar.Null)
                    {
                        var hex = Encoding.UTF8.GetString(Convert.FromHexString(data));
                        record["Data"] = hex;
                    }

                    break;
                }
                // 将JsonStr列转换为Data列，添加CompressionType列
                case TableNames.OrderModuleExtra:
                {
                    record.AppendField("CompressionType", "1");
                    record.AppendField("Data",
                        Convert.ToHexString(DeflateArchive.Compress(Convert.FromHexString(record["JsonStr"]))));
                    record.RemoveField("JsonStr");
                    break;
                }
                // 删除ID列，让数据库自行递增
                // TODO: 数据表改进，删除ID列或是替换为流水号
                case TableNames.ProcessStepEfficiency:
                {
                    record.RemoveField("ID");
                    break;
                }
                case TableNames.ProcessScheduleCapacity:
                {
                    record.RemoveField("ID");
                    break;
                }
                case TableNames.SysConfig:
                {
                    record.RemoveField("Key");
                    break;
                }
                // 移除PlaceData列（如果存在的话，生产库已经删除）
                case TableNames.SimplePlanOrder:
                {
                    if(record.HeaderExists("PlaceData"))
                        record.RemoveField("PlaceData");
                    break;
                }
                default: break;
            }

            return record;

            string ThrowIfNoCached(string? cached, string tableName, string cachedTableName, string cachedColumn, string appendMessage = "")
            {
                if (cached is null)
                    throw new InvalidDataException(
                        $"{tableName}数据异常，在缓存中未找到对应{cachedTableName}.{cachedColumn}\t{appendMessage}");
                return cached;
            }
        };
        
        // 数据缓存
        options.RecordCache = null;
        
        // 数据库过滤
        options.DatabaseFilter = record =>
        {
            var companyId = int.Parse(record[tenantDbOptions.TenantKey]); // 每个实体都应存在CompanyID，否则异常
            return tenantDbOptions.GetDbNameByTenantKeyValue(companyId);
        };
        
        // 数据重建
        options.RecordReBuild = context =>
        {
            var record = context.Record;
            
            // 将OrderExtra表迁移至OrderWaveGroup表
            if (record.TableName == TableNames.OrderExtra)
            {
                record.Ignore = true;
                var resultList = new List<DataRecord>();
                var seq = context.Services.GetRequiredService<SeqService>();
                string[] headers = ["OrderNo", "ShardKey", "ConfigType", "ConfigJson", "CompanyID"];
                var id = seq.AddCachedSeq(SeqConfig.OrderWaveGroupID);
                var orderWaveGroup = new DataRecord(
                    [id.ToString(), ..headers.Select(c => record[c])],
                    TableNames.OrderExtraList,
                    ["ID", "OrderNo", "ShardKey", "Type", "ConfigJson", "CompanyID"]);
                resultList.Add(orderWaveGroup);
                return resultList;
            }
            
            // 通过OrderItem重建OrderBlockPlanItem表
            if (record.TableName == TableNames.OrderItem)
            {
#if FIX_PLAN_ITEM
                record.Ignore = true; 
#endif
                var resultList = new List<DataRecord>();
                record.TryGetField("ID", out var itemId);
                record.TryGetField("ShardKey", out var shardKey);
                record.TryGetField("PlanID", out var planId);
                record.TryGetField("PackageID", out var packageId);
                record.TryGetField("CompanyID", out var companyId);
                if(!int.TryParse(planId, out var pid))
                    throw new ApplicationException($"数据发生异常：OrderItem.PlanID，值: {(string.IsNullOrWhiteSpace(planId) ? "NULL" : planId)}"); 
                if (pid > 0)
                {
                    resultList.Add(new DataRecord([itemId, shardKey, planId, companyId],
                        TableNames.OrderBlockPlanItem,
                        ["ItemID", "ShardKey", "PlanID", "CompanyID"]
                    ));
                }
                if(!int.TryParse(packageId, out var pkid))
                    throw new ApplicationException($"数据发生异常：OrderItem.PackageID，值: {(string.IsNullOrWhiteSpace(packageId) ? "NULL" : packageId)}"); 
                if(pkid > 0)
                {
                    resultList.Add(new DataRecord([itemId, shardKey, packageId, companyId],
                        TableNames.OrderPackageItem,
                        [ "ItemID", "ShardKey", "PackageID", "CompanyID" ]
                    ));
                }
                
                record.RemoveField("PlanID");
                record.RemoveField("PackageID");

                return resultList;
            }
            

            return ArraySegment<DataRecord>.Empty;
        };
    });
    
    host.Services.Configure<DatabaseOutputOptions>(options =>
    {
        options.ConnectionString = outputOptions.ConnectionString;
        options.FlushCount = outputOptions.FlushCount;
        options.MaxAllowedPacket = outputOptions.MaxAllowedPacket / 2;
        options.MaxDatabaseOutputTask = outputOptions.MaxDatabaseOutputTask;
        options.TreatJsonAsHex = outputOptions.TreatJsonAsHex;
        options.NoOutput = outputOptions.NoOutput;
        options.ForUpdate = outputOptions.ForUpdate;
        
        // 配置列的类型以便于在输出时区分二进制内容
        // Prod server
        options.ColumnTypeConfig = new Dictionary<string, ColumnType>
        {
            {"machine.Settings", ColumnType.Text},
            {"order_block_plan.BlockInfo", ColumnType.Text},
            {"order_block_plan.OrderNos", ColumnType.Json},
            {"order_block_plan_result.PlaceData", ColumnType.Blob},
            {"order_box_block.Data", ColumnType.Blob},
            {"order_data_block.RemarkJson", ColumnType.Text},
            {"order_data_goods.ExtraProp", ColumnType.Json},
            {"order_extra.ConfigJson", ColumnType.Json},
            {"order_module_extra.Data", ColumnType.Blob},
            {"order_module_extra.JsonStr", ColumnType.Text},
            {"order_patch_detail.BlockDetail", ColumnType.Json},
            {"order_process_schdule.AreaName", ColumnType.Text},
            {"order_process_schdule.ConsigneeAddress", ColumnType.Text},
            {"order_process_schdule.ConsigneePhone", ColumnType.Text},
            {"order_process_schdule.CustomOrderNo", ColumnType.Text},
            {"order_process_schdule.OrderProcessStepName", ColumnType.Text},
            {"order_scrap_board.OutLineJson", ColumnType.Text},
            {"order_wave_group.ConfigJson", ColumnType.Json},
            {"process_info.Users", ColumnType.Text},
            {"process_item_exp.ItemJson", ColumnType.Text},
            {"report_template.SourceConfig", ColumnType.Text},
            {"report_template.Template", ColumnType.Text},
            {"simple_package.Items", ColumnType.Json},
            {"sys_config.JsonStr", ColumnType.Text},
            {"sys_config.Value", ColumnType.Text}
        };

        options.OutputFinished += ctx =>
        {
            var seq = ctx.Serivces.GetRequiredService<SeqService>();
            seq.ApplyToDatabaseAsync().GetAwaiter().GetResult();
        };
    });
    
    host.Services.AddLogging(builder =>
    {
        builder.ClearProviders();
        var logger = new LoggerConfiguration()
            .MinimumLevel.Verbose()
            .WriteTo.Console()
            .WriteTo.File(Path.Combine(AppDomain.CurrentDomain.BaseDirectory, $"./Log/Error/{ErrorRecorder.UID}.log"),
                restrictedToMinimumLevel: LogEventLevel.Error)
            // .WriteTo.File("./Log/Info/{ErrorRecorder.UID}.log", restrictedToMinimumLevel:LogEventLevel.Information) //性能考虑暂不使用
            .CreateLogger();
        builder.AddSerilog(logger);
        Log.Logger = logger;
    });

    host.Services.AddDataSourceFactory();
    host.Services.AddErrorRecorderFactory();
    host.Services.AddSingleton<ProcessContext>();
    host.Services.AddSingleton<SeqService>();
    var prodLen = host.Configuration.GetRequiredSection("RecordQueue").GetValue<int>("ProducerQueueLength");
    var consLen = host.Configuration.GetRequiredSection("RecordQueue").GetValue<int>("ConsumerQueueLength");
    var maxCharCount = host.Configuration.GetRequiredSection("RecordQueue").GetValue<long>("MaxByteCount") / 2;
    host.Services.AddKeyedSingleton<DataRecordQueue>(ConstVar.Producer, new DataRecordQueue(prodLen, maxCharCount));
    host.Services.AddRecordQueuePool(tenantDbOptions.DbGroup.Keys.Select(key => (key:key, queue:new DataRecordQueue(consLen, maxCharCount))).ToArray());
    // host.Services.AddSingleton<ITaskMonitorLogger, CacheTaskMonitorLogger>();
    host.Services.AddSingleton<ITaskMonitorLogger, LoggerTaskMonitorLogger>();

    host.Services.AddHostedService<MainHostedService>();
    host.Services.AddSingleton<IInputService, FileInputService>();
    host.Services.AddSingleton<ITransformService, TransformService>();
    host.Services.AddSingleton<IOutputService, OutputService>();
    host.Services.AddSingleton<TaskMonitorService>();
    // host.Services.AddRedisCache(redisOptions);
    host.Services.AddSingleton<ICacher, MemoryCache>();
    var app = host.Build();
    await app.RunAsync();
}