namespace Admin.NET.Plugin.AiDOP.Order;

/// <summary>
/// 数据中台统一 MDP 运行监控。
/// </summary>
[ApiDescriptionSettings(Order = 322, Description = "统一MDP运行监控")]
[Route("api/DataPlatform")]
[AllowAnonymous]
[NonUnify]
public class MdpMonitorService : IDynamicApiController, ITransient
{
    private static readonly Dictionary<string, string> ModuleJobCodes = new(StringComparer.OrdinalIgnoreCase)
    {
        ["S1"] = "S1_MDP_SYNC_TRANSFORM",
        ["S3"] = "S3_MDP_SYNC_TRANSFORM"
    };

    private readonly ISqlSugarClient _db;

    public MdpMonitorService(ISqlSugarClient db)
    {
        _db = db;
    }

    [DisplayName("MDP模块选项")]
    [HttpGet("mdp-monitor/modules")]
    public object GetModules()
    {
        return ModuleJobCodes
            .OrderBy(u => u.Key)
            .Select(u => new { moduleCode = u.Key, jobCode = u.Value })
            .ToList();
    }

    [DisplayName("MDP最近运行状态")]
    [HttpGet("mdp-monitor/latest")]
    public async Task<object> GetLatest([FromQuery] MdpMonitorQueryInput input)
    {
        var (whereSql, pars) = BuildWhere(input);
        return await _db.Ado.SqlQuerySingleAsync<MdpMonitorRunLogRow>(
            $"""
            {SelectColumnsSql()}
            FROM mdp_transform_run_log
            WHERE {whereSql}
            ORDER BY start_time DESC, id DESC
            LIMIT 1
            """,
            pars)
            ?? new MdpMonitorRunLogRow();
    }

    [DisplayName("MDP运行日志列表")]
    [HttpGet("mdp-monitor/list")]
    public async Task<object> GetList([FromQuery] MdpMonitorListInput input)
    {
        var page = input.Page <= 0 ? 1 : input.Page;
        var pageSize = input.PageSize <= 0 ? 10 : input.PageSize;
        var offset = (page - 1) * pageSize;
        var (whereSql, pars) = BuildWhere(input);

        var total = await _db.Ado.GetIntAsync($"SELECT COUNT(1) FROM mdp_transform_run_log WHERE {whereSql}", pars);
        var list = await _db.Ado.SqlQueryAsync<MdpMonitorRunLogRow>(
            $"""
            {SelectColumnsSql()}
            FROM mdp_transform_run_log
            WHERE {whereSql}
            ORDER BY start_time DESC, id DESC
            LIMIT {pageSize} OFFSET {offset}
            """,
            pars);

        return new { total, page, pageSize, list };
    }

    [DisplayName("MDP运行日志详情")]
    [HttpGet("mdp-monitor/detail/{id}")]
    public async Task<object> GetDetail(long id, [FromQuery] MdpMonitorQueryInput input)
    {
        var (whereSql, pars) = BuildWhere(input);
        pars.Add(new SugarParameter("@Id", id));

        var row = await _db.Ado.SqlQuerySingleAsync<MdpMonitorRunLogRow>(
            $"""
            {SelectColumnsSql()}
            FROM mdp_transform_run_log
            WHERE id=@Id AND {whereSql}
            LIMIT 1
            """,
            pars);
        return row ?? throw Oops.Oh("运行日志不存在");
    }

    [DisplayName("MDP同步链路详情")]
    [HttpGet("mdp-monitor/lineage")]
    public async Task<object> GetLineage([FromQuery] MdpMonitorLineageInput input)
    {
        var moduleCode = ResolveModuleCode(input.ModuleCode, input.JobCode);
        if (string.IsNullOrWhiteSpace(moduleCode))
            throw Oops.Oh("请选择 MDP 模块");

        var jobCode = ResolveJobCode(moduleCode, input.JobCode);
        var entityPrefix = $"{moduleCode}_%";

        var entities = await _db.Ado.SqlQueryAsync<MdpLineageEntityRow>(
            """
            SELECT e.id AS Id, e.entity_code AS EntityCode, e.entity_name AS EntityName,
                   e.entity_type AS EntityType, s.source_code AS SourceCode,
                   s.source_name AS SourceName, s.source_type AS SourceType,
                   s.db_type AS SourceDbType, s.db_host AS SourceDbHost,
                   s.db_port AS SourceDbPort, s.db_name AS SourceDbName,
                   e.source_table_name AS SourceTableName, e.source_api_path AS SourceApiPath,
                   s.db_type AS TargetDbType, s.db_host AS TargetDbHost,
                   s.db_port AS TargetDbPort, s.db_name AS TargetDbName,
                   e.target_table_name AS TargetTableName, e.sync_mode AS SyncMode,
                   e.incr_column AS IncrColumn, e.status AS Status
            FROM mdp_entity e
            LEFT JOIN mdp_source s ON s.id = e.source_id
            WHERE e.entity_code LIKE @EntityPrefix
            ORDER BY e.entity_code
            """,
            new SugarParameter("@EntityPrefix", entityPrefix));

        if (entities.Count == 0)
        {
            return new MdpLineageOutput
            {
                ModuleCode = moduleCode,
                JobCode = jobCode,
                Stages = BuildStageDescriptions(moduleCode),
                Entities = new List<MdpLineageEntityRow>()
            };
        }

        var entityIds = string.Join(",", entities.Select(u => u.Id));
        var mappings = await _db.Ado.SqlQueryAsync<MdpLineageFieldMappingRow>(
            $"""
            SELECT entity_id AS EntityId, source_field AS SourceField, target_field AS TargetField,
                   field_type AS FieldType, transform_script AS TransformScript,
                   const_value AS ConstValue, lookup_table AS LookupTable,
                   is_required AS IsRequired, default_value AS DefaultValue, sort_order AS SortOrder
            FROM mdp_field_mapping
            WHERE entity_id IN ({entityIds})
            ORDER BY entity_id, sort_order, target_field
            """);
        var mappingsByEntity = mappings.GroupBy(u => u.EntityId).ToDictionary(u => u.Key, u => u.ToList());

        Dictionary<long, MdpLineageSyncLogRow> syncLogsByEntity = new();
        if (!string.IsNullOrWhiteSpace(input.BatchId))
        {
            var syncLogs = await _db.Ado.SqlQueryAsync<MdpLineageSyncLogRow>(
                """
                SELECT entity_id AS EntityId, entity_name AS EntityName, status AS Status,
                       rows_read AS RowsRead, rows_insert AS RowsInsert, rows_update AS RowsUpdate,
                       rows_skip AS RowsSkip, rows_error AS RowsError,
                       sync_start AS SyncStart, sync_end AS SyncEnd, duration_ms AS DurationMs,
                       error_msg AS ErrorMsg
                FROM mdp_sync_log
                WHERE sync_batch_id = @BatchId
                  AND entity_id IN (
                      SELECT id FROM mdp_entity WHERE entity_code LIKE @EntityPrefix
                  )
                ORDER BY sync_start, id
                """,
                new SugarParameter("@BatchId", input.BatchId.Trim()),
                new SugarParameter("@EntityPrefix", entityPrefix));
            syncLogsByEntity = syncLogs
                .GroupBy(u => u.EntityId)
                .ToDictionary(u => u.Key, u => u.OrderByDescending(x => x.SyncStart).First());
        }

        foreach (var entity in entities)
        {
            entity.SourceFullName = BuildObjectFullName(entity.SourceDbType, entity.SourceDbHost, entity.SourceDbPort, entity.SourceDbName, entity.SourceTableName ?? entity.SourceApiPath);
            entity.TargetFullName = BuildObjectFullName(entity.TargetDbType, entity.TargetDbHost, entity.TargetDbPort, entity.TargetDbName, entity.TargetTableName);

            if (mappingsByEntity.TryGetValue(entity.Id, out var entityMappings))
            {
                entity.FieldMappings = entityMappings;
                entity.FieldMappingCount = entityMappings.Count;
            }
            if (syncLogsByEntity.TryGetValue(entity.Id, out var syncLog))
                entity.SyncLog = syncLog;
        }

        return new MdpLineageOutput
        {
            ModuleCode = moduleCode,
            JobCode = jobCode,
            BatchId = input.BatchId,
            Stages = BuildStageDescriptions(moduleCode),
            Entities = entities
        };
    }

    private static (string WhereSql, List<SugarParameter> Parameters) BuildWhere(MdpMonitorQueryInput input)
    {
        var where = new List<string> { "IFNULL(job_code, '') LIKE '%MDP%'" };
        var pars = new List<SugarParameter>();

        var jobCode = ResolveJobCode(input.ModuleCode, input.JobCode);
        if (!string.IsNullOrWhiteSpace(jobCode))
        {
            where.Add("job_code=@JobCode");
            pars.Add(new SugarParameter("@JobCode", jobCode));
        }
        if (!string.IsNullOrWhiteSpace(input.BatchId))
        {
            where.Add("batch_id LIKE @BatchId");
            pars.Add(new SugarParameter("@BatchId", $"%{input.BatchId.Trim()}%"));
        }
        if (!string.IsNullOrWhiteSpace(input.Status))
        {
            where.Add("status=@Status");
            pars.Add(new SugarParameter("@Status", input.Status.Trim().ToUpperInvariant()));
        }
        if (input.StartTime.HasValue)
        {
            where.Add("start_time >= @StartTime");
            pars.Add(new SugarParameter("@StartTime", input.StartTime.Value));
        }
        if (input.EndTime.HasValue)
        {
            where.Add("start_time <= @EndTime");
            pars.Add(new SugarParameter("@EndTime", input.EndTime.Value));
        }

        return (string.Join(" AND ", where), pars);
    }

    private static string? ResolveJobCode(string? moduleCode, string? jobCode)
    {
        if (!string.IsNullOrWhiteSpace(jobCode))
            return jobCode.Trim().ToUpperInvariant();

        if (string.IsNullOrWhiteSpace(moduleCode))
            return null;

        return ModuleJobCodes.TryGetValue(moduleCode.Trim(), out var mapped) ? mapped : null;
    }

    private static string? ResolveModuleCode(string? moduleCode, string? jobCode)
    {
        if (!string.IsNullOrWhiteSpace(moduleCode))
            return moduleCode.Trim().ToUpperInvariant();

        if (string.IsNullOrWhiteSpace(jobCode))
            return null;

        var normalizedJobCode = jobCode.Trim();
        return ModuleJobCodes.FirstOrDefault(u => string.Equals(u.Value, normalizedJobCode, StringComparison.OrdinalIgnoreCase)).Key;
    }

    private static string? BuildObjectFullName(string? dbType, string? host, int? port, string? dbName, string? objectName)
    {
        if (string.IsNullOrWhiteSpace(objectName))
            return null;

        var databaseObject = string.IsNullOrWhiteSpace(dbName) ? objectName : $"{dbName}.{objectName}";
        var hostPart = string.IsNullOrWhiteSpace(host) ? null : port.HasValue ? $"{host}:{port}" : host;
        return string.Join(" / ", new[] { dbType, hostPart, databaseObject }.Where(u => !string.IsNullOrWhiteSpace(u)));
    }

    private static List<MdpLineageStageRow> BuildStageDescriptions(string moduleCode)
    {
        if (string.Equals(moduleCode, "S1", StringComparison.OrdinalIgnoreCase))
        {
            return new List<MdpLineageStageRow>
            {
                new() { StageCode = "STAGING", StageName = "贴源同步", Layer = "mdp_stg", Description = "按 mdp_entity 登记的 S1 源对象抽取数据，保留 raw_data JSON 便于追溯。", InputObjects = "旧系统 / 当前库源对象", OutputObjects = "mdp_stg_so, mdp_stg_ship_trans", Execution = "S1MdpSyncTransformService.SyncStagingAsync" },
                new() { StageCode = "STANDARD", StageName = "标准层转换", Layer = "mdp_std", Description = "解析贴源 raw_data，做字段标准化、租户兜底和幂等写入。", InputObjects = "mdp_stg_so, mdp_stg_ship_trans", OutputObjects = "mdp_std_so, mdp_std_ship_trans", Execution = "S1MdpSyncTransformService.BuildStandardCommands" },
                new() { StageCode = "DWD", StageName = "DWD宽表", Layer = "dwd", Description = "沉淀 S1 订单交付事实，供订单交付、看板和诊断读取。", InputObjects = "mdp_std_so, mdp_std_ship_trans", OutputObjects = "dwd_ship_trans", Execution = "S1MdpSyncTransformService.BuildDwdAsync" },
                new() { StageCode = "KPI", StageName = "指标写入", Layer = "ado_s9", Description = "计算 S1 L1 指标并写入统一指标值表。", InputObjects = "mdp_std_so, dwd_ship_trans", OutputObjects = "ado_s9_kpi_value_l1_day", Execution = "S1MdpSyncTransformService.BuildS1KpiValuesAsync" }
            };
        }

        if (string.Equals(moduleCode, "S3", StringComparison.OrdinalIgnoreCase))
        {
            return new List<MdpLineageStageRow>
            {
                new() { StageCode = "STAGING", StageName = "贴源同步", Layer = "mdp_stg", Description = "按 mdp_entity 登记的 S3 源对象抽取数据，保留 raw_data JSON 便于追溯。", InputObjects = "S3 源对象", OutputObjects = "mdp_stg_*", Execution = "S3MdpSyncTransformService.SyncStagingAsync" },
                new() { StageCode = "STANDARD", StageName = "标准层转换", Layer = "mdp_std", Description = "将供应、物料、采购、交付等对象标准化。", InputObjects = "mdp_stg_*", OutputObjects = "mdp_std_*", Execution = "S3MdpSyncTransformService.BuildStandardCommands" },
                new() { StageCode = "DWD", StageName = "DWD宽表", Layer = "dwd", Description = "生成供应交付、齐套、风险等分析宽表。", InputObjects = "mdp_std_*", OutputObjects = "dwd_supplier_delivery / dwd_material_readiness 等", Execution = "S3MdpSyncTransformService.BuildDwdAsync" },
                new() { StageCode = "KPI", StageName = "指标写入", Layer = "ado_s9", Description = "写入 S3 供应协同指标。", InputObjects = "mdp_std_* / dwd_*", OutputObjects = "ado_s9_kpi_value_*", Execution = "S3MdpSyncTransformService.BuildS3KpiValuesAsync" }
            };
        }

        return new List<MdpLineageStageRow>
        {
            new() { StageCode = "STAGING", StageName = "贴源同步", Layer = "mdp_stg", Description = "按 mdp_entity 登记源对象抽取数据。", InputObjects = "源对象", OutputObjects = "mdp_stg_*", Execution = "模块 MDP 同步服务" },
            new() { StageCode = "STANDARD", StageName = "标准层转换", Layer = "mdp_std", Description = "标准层/DWD/KPI 当前由模块后端 Service 承载。", InputObjects = "mdp_stg_*", OutputObjects = "mdp_std_* / dwd_* / 指标表", Execution = "模块 MDP 转换服务" }
        };
    }

    private static string SelectColumnsSql()
    {
        return """
            SELECT id AS Id, tenant_id AS TenantId, job_code AS JobCode, job_name AS JobName, trigger_type AS TriggerType,
                   batch_id AS BatchId, status AS Status, start_time AS StartTime, end_time AS EndTime, duration_ms AS DurationMs,
                   stage_rows AS StageRows, standard_rows AS StandardRows, dwd_rows AS DwdRows,
                   error_message AS ErrorMessage, summary_json AS SummaryJson, create_time AS CreateTime, update_time AS UpdateTime
            """;
    }
}

public class MdpMonitorQueryInput
{
    public string? ModuleCode { get; set; }
    public string? JobCode { get; set; }
    public string? BatchId { get; set; }
    public string? Status { get; set; }
    public DateTime? StartTime { get; set; }
    public DateTime? EndTime { get; set; }
}

public sealed class MdpMonitorListInput : MdpMonitorQueryInput
{
    public int Page { get; set; } = 1;
    public int PageSize { get; set; } = 10;
}

public sealed class MdpMonitorLineageInput : MdpMonitorQueryInput
{
}

public sealed class MdpMonitorRunLogRow
{
    public long Id { get; set; }
    public long TenantId { get; set; }
    public string? JobCode { get; set; }
    public string? JobName { get; set; }
    public string? TriggerType { get; set; }
    public string? BatchId { get; set; }
    public string? Status { get; set; }
    public DateTime? StartTime { get; set; }
    public DateTime? EndTime { get; set; }
    public int? DurationMs { get; set; }
    public int? StageRows { get; set; }
    public int? StandardRows { get; set; }
    public int? DwdRows { get; set; }
    public string? ErrorMessage { get; set; }
    public string? SummaryJson { get; set; }
    public DateTime? CreateTime { get; set; }
    public DateTime? UpdateTime { get; set; }
}

public sealed class MdpLineageOutput
{
    public string? ModuleCode { get; set; }
    public string? JobCode { get; set; }
    public string? BatchId { get; set; }
    public List<MdpLineageStageRow> Stages { get; set; } = new();
    public List<MdpLineageEntityRow> Entities { get; set; } = new();
}

public sealed class MdpLineageStageRow
{
    public string? StageCode { get; set; }
    public string? StageName { get; set; }
    public string? Layer { get; set; }
    public string? Description { get; set; }
    public string? InputObjects { get; set; }
    public string? OutputObjects { get; set; }
    public string? Execution { get; set; }
}

public sealed class MdpLineageEntityRow
{
    public long Id { get; set; }
    public string? EntityCode { get; set; }
    public string? EntityName { get; set; }
    public string? EntityType { get; set; }
    public string? SourceCode { get; set; }
    public string? SourceName { get; set; }
    public string? SourceType { get; set; }
    public string? SourceDbType { get; set; }
    public string? SourceDbHost { get; set; }
    public int? SourceDbPort { get; set; }
    public string? SourceDbName { get; set; }
    public string? SourceTableName { get; set; }
    public string? SourceApiPath { get; set; }
    public string? SourceFullName { get; set; }
    public string? TargetDbType { get; set; }
    public string? TargetDbHost { get; set; }
    public int? TargetDbPort { get; set; }
    public string? TargetDbName { get; set; }
    public string? TargetTableName { get; set; }
    public string? TargetFullName { get; set; }
    public string? SyncMode { get; set; }
    public string? IncrColumn { get; set; }
    public int? Status { get; set; }
    public int FieldMappingCount { get; set; }
    public List<MdpLineageFieldMappingRow> FieldMappings { get; set; } = new();
    public MdpLineageSyncLogRow? SyncLog { get; set; }
}

public sealed class MdpLineageFieldMappingRow
{
    public long EntityId { get; set; }
    public string? SourceField { get; set; }
    public string? TargetField { get; set; }
    public string? FieldType { get; set; }
    public string? TransformScript { get; set; }
    public string? ConstValue { get; set; }
    public string? LookupTable { get; set; }
    public bool IsRequired { get; set; }
    public string? DefaultValue { get; set; }
    public int SortOrder { get; set; }
}

public sealed class MdpLineageSyncLogRow
{
    public long EntityId { get; set; }
    public string? EntityName { get; set; }
    public string? Status { get; set; }
    public long? RowsRead { get; set; }
    public long? RowsInsert { get; set; }
    public long? RowsUpdate { get; set; }
    public long? RowsSkip { get; set; }
    public long? RowsError { get; set; }
    public DateTime? SyncStart { get; set; }
    public DateTime? SyncEnd { get; set; }
    public int? DurationMs { get; set; }
    public string? ErrorMsg { get; set; }
}