using Admin.NET.Plugin.AiDOP.Infrastructure;
using Admin.NET.Plugin.AiDOP.ProcurementExecution;
using Yitter.IdGenerator;

namespace Admin.NET.Plugin.AiDOP.Supply;

/// <summary>
/// S4 采购执行闭环：缺料生成 PR → 合并 → 要货令转 DO/PO → 外部推送日志。
/// 对应旧系统 AutoTransferDoOrPo / AutomaticPrAdjustDate 业务意图。
/// </summary>
[ApiDescriptionSettings(Order = 309, Description = "采购执行闭环")]
[Route("api/Supply")]
[AllowAnonymous]
[NonUnify]
public class ProcurementPipelineService : IDynamicApiController, ITransient
{
    private readonly ISqlSugarClient _db;
    private readonly UserManager _userManager;
    private readonly PurchaseRequestFromShortageService _shortageService;
    private readonly PurchaseRequestMergeService _mergeService;
    private readonly NumberRuleService _numberRuleService;
    private readonly PurchaseOrderTransferService _transferService;
    private readonly PurchaseRequestExternalPushService _pushService;
    private readonly AidopActionRunLogWriter _runLog;
    private readonly S4MdpSyncTransformService _s4MdpSync;
    private readonly S4ReadPathConsistencyService _readPathCheck;

    public ProcurementPipelineService(
        ISqlSugarClient db,
        UserManager userManager,
        PurchaseRequestFromShortageService shortageService,
        PurchaseRequestMergeService mergeService,
        NumberRuleService numberRuleService,
        PurchaseOrderTransferService transferService,
        PurchaseRequestExternalPushService pushService,
        AidopActionRunLogWriter runLog,
        S4MdpSyncTransformService s4MdpSync,
        S4ReadPathConsistencyService readPathCheck)
    {
        _db = db;
        _userManager = userManager;
        _shortageService = shortageService;
        _mergeService = mergeService;
        _numberRuleService = numberRuleService;
        _transferService = transferService;
        _pushService = pushService;
        _runLog = runLog;
        _s4MdpSync = s4MdpSync;
        _readPathCheck = readPathCheck;
    }

    /// <summary>执行采购闭环（合并待处理 PR、转单、写 QadTracking）。</summary>
    [DisplayName("采购执行闭环")]
    [HttpPost("procurement/execute-pipeline")]
    public async Task<ProcurementPipelineResult> ExecutePipeline(
        [FromQuery] string? domain,
        [FromQuery] bool createFromShortage = true,
        [FromQuery] bool mergeHistorical = true,
        [FromQuery] bool enableExternalPush = true)
    {
        var tenantId = ResolveTenantId(domain);
        var account = _userManager.Account ?? "system";
        var logId = await _runLog.StartAsync("S4_PROCUREMENT_PIPELINE", tenantId, "tenant", tenantId, domain ?? tenantId.ToString());

        try
        {
            var result = await ExecuteCoreAsync(tenantId, account, createFromShortage, mergeHistorical, enableExternalPush);
            result.ReadPathConsistency = await _readPathCheck.CheckTenantAsync(tenantId);
            result.Warnings.AddRange(await TryTriggerS4MdpRefreshAsync(result));
            await _runLog.SuccessAsync(logId, result.Message, result);
            return result;
        }
        catch (Exception ex)
        {
            await _runLog.FailedAsync(logId, ex.Message, new { tenantId, domain });
            throw Oops.Oh(ex.Message);
        }
    }

    /// <summary>S4 读路径一致性检查（运行表 vs DWD）。</summary>
    [DisplayName("S4读路径一致性检查")]
    [HttpGet("procurement/read-path-consistency")]
    public async Task<S4ReadPathConsistencyResult> ReadPathConsistency([FromQuery] string? domain)
    {
        var tenantId = ResolveTenantId(domain);
        return await _readPathCheck.CheckTenantAsync(tenantId);
    }

    public async Task<ProcurementPipelineResult> ExecuteCoreAsync(
        long tenantId,
        string account,
        bool createFromShortage,
        bool mergeHistorical = true,
        bool enableExternalPush = true)
    {
        var result = new ProcurementPipelineResult();
        var now = DateTime.Now;

        await _db.Ado.BeginTranAsync();
        try
        {
            var newRequests = new List<PurchaseRequestMain>();
            if (createFromShortage)
            {
                newRequests = await _shortageService.BuildFromResourceCheckAsync(tenantId, account);
                result.ShortageItemCount = newRequests.Count;
            }

            if (newRequests.Count > 0)
            {
                var mergeNew = _mergeService.MergeGeneratedRequests(newRequests);
                newRequests = mergeNew.Requests;
                result.PrMergeReducedCount += mergeNew.ReducedCount;
                await AssignPrNumbersAsync(newRequests, account);
                await InsertPurchaseRequestsAsync(newRequests);
                result.PrCreatedCount = newRequests.Count;
            }

            if (mergeHistorical)
            {
                var historicalMerge = await _mergeService.MergeTenantPendingAsync(tenantId, account);
                result.PrMergeReducedCount += historicalMerge.ReducedCount;
                result.HistoricalPrMergedGroups = historicalMerge.MergedGroupCount;
                result.PrCreatedCount += historicalMerge.CreatedPrCount;
            }

            var pending = await LoadPendingPurchaseRequestsAsync(tenantId);
            result.PendingPrCount = pending.Count;

            if (pending.Any(x => x.IsRequireGoods == 1))
            {
                var transfer = await _transferService.TransferGeneratedRequireGoodsAsync(
                    pending.Where(x => x.IsRequireGoods == 1).ToList(), account);
                result.PoCreatedCount = transfer.CreatedOrderCount;
                result.PoTransferredPrCount = transfer.TransferredPrCount;
                result.PoOccupyRehangedCount = transfer.PoOccupyRehangedCount;
                result.CreatedPoNumbers = transfer.CreatedOrders;
                await PersistPrStateUpdatesAsync(transfer.TransferredPrIds, 4, account);
            }

            var pushCandidates = pending
                .Where(x => x.IsRequireGoods == 0 && (x.State ?? 0) == 1)
                .Concat(newRequests.Where(x => x.IsRequireGoods == 0))
                .GroupBy(x => x.Id)
                .Select(g => g.First())
                .ToList();

            if (enableExternalPush && pushCandidates.Count > 0)
            {
                var push = await _pushService.CreateQadTrackingForGeneratedRequestsAsync(pushCandidates, account);
                result.QadTrackingCount = push.TrackingCount;
                result.QadTrackingSkippedCount = push.SkippedCandidateCount;
                result.Warnings.AddRange(push.Warnings);
                await PersistPrStateUpdatesAsync(push.PushedPrIds, 2, account);
            }

            await _db.Ado.CommitTranAsync();
        }
        catch
        {
            await _db.Ado.RollbackTranAsync();
            throw;
        }

        result.Message = BuildMessage(result);
        return result;
    }

    private async Task<List<PurchaseRequestMain>> LoadPendingPurchaseRequestsAsync(long tenantId)
    {
        var windowEnd = DateTime.Today.AddDays(35);
        var rows = await _db.Ado.SqlQueryAsync<PurchaseRequestMain>(
            """
            SELECT
                Id, pr_billno AS PrBillNo, pr_purchaseid AS PrPurchaseId,
                pr_purchasenumber AS PrPurchaseNumber, pr_purchasename AS PrPurchaseName,
                pr_purchaser AS PrPurchaser, pr_purchaser_num AS PrPurchaserNum,
                pr_rqty AS PrRqty, pr_aqty AS PrAqty, pr_sqty AS PrSqty,
                icitem_id AS IcitemId, icitem_name AS IcitemName,
                pr_ssend_date AS PrSsendDate, pr_sarrive_date AS PrSarriveDate,
                pr_unit AS PrUnit, state AS State, pr_type AS PrType,
                currencytype AS CurrencyType, tenant_id AS TenantId,
                factory_id AS FactoryId, org_id AS OrgId, company_id AS CompanyId,
                IsRequireGoods, supplier_type AS SupplierType, IsDeleted
            FROM srm_pr_main
            WHERE tenant_id = @TenantId
              AND IFNULL(IsDeleted, 0) = 0
              AND IFNULL(state, 0) = 1
              AND IFNULL(analogcalcversion, '') = ''
              AND pr_ssend_date IS NOT NULL
              AND pr_ssend_date <= @WindowEnd
            ORDER BY pr_ssend_date, Id
            """,
            new SugarParameter("@TenantId", tenantId),
            new SugarParameter("@WindowEnd", windowEnd));

        return rows;
    }

    private async Task AssignPrNumbersAsync(List<PurchaseRequestMain> requests, string account)
    {
        foreach (var group in requests.GroupBy(x => x.TenantId.ToString()))
        {
            var rows = group.ToList();
            var numbers = await _numberRuleService.NextBatchInCurrentTransactionAsync("PR", group.Key, rows.Count, account);
            if (numbers.Count < rows.Count)
                throw Oops.Oh("采购申请编号生成失败");
            for (var i = 0; i < rows.Count; i++)
                rows[i].PrBillNo = numbers[i].Trim();
        }
    }

    private async Task InsertPurchaseRequestsAsync(List<PurchaseRequestMain> requests)
    {
        foreach (var pr in requests)
        {
            await _db.Ado.ExecuteCommandAsync(
                """
                INSERT INTO srm_pr_main
                (Id,pr_billno,pr_purchaseid,pr_purchasenumber,pr_purchasename,pr_purchaser,pr_purchaser_num,
                 pr_rqty,pr_aqty,pr_sqty,icitem_id,icitem_name,pr_ssend_date,pr_sarrive_date,pr_unit,state,pr_type,currencytype,
                 create_by_name,create_time,update_by_name,update_time,tenant_id,factory_id,org_id,IsDeleted,company_id,IsRequireGoods,supplier_type)
                VALUES
                (@Id,@PrBillNo,@PrPurchaseId,@PrPurchaseNumber,@PrPurchaseName,@PrPurchaser,@PrPurchaserNum,
                 @PrRqty,@PrAqty,@PrSqty,@IcitemId,@IcitemName,@PrSsendDate,@PrSarriveDate,@PrUnit,@State,@PrType,@CurrencyType,
                 @CreateByName,@CreateTime,@UpdateByName,@UpdateTime,@TenantId,@FactoryId,@OrgId,0,@CompanyId,@IsRequireGoods,@SupplierType)
                """,
                new SugarParameter("@Id", pr.Id),
                new SugarParameter("@PrBillNo", pr.PrBillNo),
                new SugarParameter("@PrPurchaseId", pr.PrPurchaseId),
                new SugarParameter("@PrPurchaseNumber", pr.PrPurchaseNumber),
                new SugarParameter("@PrPurchaseName", pr.PrPurchaseName),
                new SugarParameter("@PrPurchaser", pr.PrPurchaser),
                new SugarParameter("@PrPurchaserNum", pr.PrPurchaserNum),
                new SugarParameter("@PrRqty", pr.PrRqty),
                new SugarParameter("@PrAqty", pr.PrAqty),
                new SugarParameter("@PrSqty", pr.PrSqty),
                new SugarParameter("@IcitemId", pr.IcitemId),
                new SugarParameter("@IcitemName", pr.IcitemName),
                new SugarParameter("@PrSsendDate", pr.PrSsendDate),
                new SugarParameter("@PrSarriveDate", pr.PrSarriveDate),
                new SugarParameter("@PrUnit", pr.PrUnit),
                new SugarParameter("@State", pr.State ?? 1),
                new SugarParameter("@PrType", pr.PrType ?? 3),
                new SugarParameter("@CurrencyType", pr.CurrencyType),
                new SugarParameter("@CreateByName", pr.CreateByName),
                new SugarParameter("@CreateTime", pr.CreateTime),
                new SugarParameter("@UpdateByName", pr.UpdateByName),
                new SugarParameter("@UpdateTime", pr.UpdateTime),
                new SugarParameter("@TenantId", pr.TenantId),
                new SugarParameter("@FactoryId", pr.FactoryId),
                new SugarParameter("@OrgId", pr.OrgId),
                new SugarParameter("@CompanyId", pr.CompanyId ?? 1000),
                new SugarParameter("@IsRequireGoods", pr.IsRequireGoods),
                new SugarParameter("@SupplierType", pr.SupplierType));
        }
    }

    private async Task PersistPrStateUpdatesAsync(IReadOnlyList<long> prIds, int state, string account)
    {
        if (prIds.Count == 0) return;
        foreach (var id in prIds.Distinct())
        {
            await _db.Ado.ExecuteCommandAsync(
                """
                UPDATE srm_pr_main
                SET state = @State, update_by_name = @User, update_time = @Now
                WHERE Id = @Id
                """,
                new SugarParameter("@State", state),
                new SugarParameter("@User", account),
                new SugarParameter("@Now", DateTime.Now),
                new SugarParameter("@Id", id));
        }
    }

    private long ResolveTenantId(string? domain)
    {
        if (!string.IsNullOrWhiteSpace(domain) && long.TryParse(domain.Trim(), out var tid) && tid > 0)
            return tid;
        return AidopTenantHelper.Resolve(App.HttpContext);
    }

    private async Task<List<string>> TryTriggerS4MdpRefreshAsync(ProcurementPipelineResult result)
    {
        var warnings = new List<string>();
        if (result.PrCreatedCount == 0 && result.PoCreatedCount == 0 && result.QadTrackingCount == 0)
            return warnings;

        try
        {
            var mdp = await _s4MdpSync.RunFullAsync(triggerType: "PROCUREMENT_PIPELINE");
            result.S4MdpRefreshed = true;
            result.S4MdpBatchId = mdp.BatchId;
        }
        catch (Exception ex)
        {
            warnings.Add($"S4 MDP/DWD 刷新未完成：{ex.Message}");
        }
        return warnings;
    }

    private static string BuildMessage(ProcurementPipelineResult r)
    {
        var parts = new List<string>();
        if (r.PrCreatedCount > 0) parts.Add($"新建 PR {r.PrCreatedCount}");
        if (r.PoCreatedCount > 0) parts.Add($"转 DO/PO {r.PoCreatedCount}");
        if (r.QadTrackingCount > 0) parts.Add($"外部推送 {r.QadTrackingCount}");
        return parts.Count > 0 ? string.Join("，", parts) : "无待处理采购申请";
    }
}

public sealed class ProcurementPipelineResult
{
    public int ShortageItemCount { get; set; }
    public int PrCreatedCount { get; set; }
    public int PrMergeReducedCount { get; set; }
    public int HistoricalPrMergedGroups { get; set; }
    public int PendingPrCount { get; set; }
    public int PoCreatedCount { get; set; }
    public int PoTransferredPrCount { get; set; }
    public int PoOccupyRehangedCount { get; set; }
    public int QadTrackingCount { get; set; }
    public int QadTrackingSkippedCount { get; set; }
    public List<string> CreatedPoNumbers { get; set; } = new();
    public List<string> Warnings { get; set; } = new();
    public bool S4MdpRefreshed { get; set; }
    public string? S4MdpBatchId { get; set; }
    public S4ReadPathConsistencyResult? ReadPathConsistency { get; set; }
    public string Message { get; set; } = string.Empty;
}