using Admin.NET.Plugin.AiDOP.MaterialWarehouse.InventoryPosting.Entity;
using SqlSugar;
using Yitter.IdGenerator;

namespace Admin.NET.Plugin.AiDOP.MaterialWarehouse.InventoryPosting.Idempotency;

/// <summary>
/// 生产 IQC 过账头幂等存储：依赖 `ado_iqc_inventory_posting` 的 DB UNIQUE `uk_ado_iqc_posting_fbillno`
/// (tenant_id, domain_code, fbillno) 原子占位——**INSERT 直上，撞唯一约束(1062)时回读既有记录**，不做先查后插。
///
/// ⚠️ Phase 4B（未在本轮实库验证）：目标库 = aidopdev(ConfigId 1300000000001)；DB UNIQUE 实际拒绝与真实并发行为待补。
/// </summary>
public sealed class SqlSugarIqcPostingStore : IIqcPostingStore, ITransient
{
    private readonly ISqlSugarClient _db;

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

    public async Task<PostingInsertResult> TryInsertAsync(AdoIqcInventoryPosting posting)
    {
        if (posting == null) throw new ArgumentNullException(nameof(posting));
        if (posting.Id == 0) posting.Id = YitIdHelper.NextId();
        if (posting.CreateTime == default) posting.CreateTime = DateTime.Now;
        if (posting.UpdateTime == null) posting.UpdateTime = posting.CreateTime;   // 认领即起租(lease 心跳基准)

        try
        {
            await _db.Insertable(posting).ExecuteCommandAsync();
            return new PostingInsertResult { Inserted = true };
        }
        catch (Exception ex) when (IsDuplicateKey(ex))
        {
            var existing = await GetAsync(posting.TenantId, posting.DomainCode, posting.FbillNo);
            return new PostingInsertResult { Inserted = false, Existing = existing };
        }
    }

    public async Task<AdoIqcInventoryPosting> GetAsync(long tenantId, string domainCode, string fbillNo)
    {
        var domain = domainCode ?? string.Empty;
        return await _db.Queryable<AdoIqcInventoryPosting>()
            .Where(x => x.TenantId == tenantId && x.DomainCode == domain && x.FbillNo == fbillNo)
            .FirstAsync();
    }

    public async Task UpdateStatusAsync(AdoIqcInventoryPosting posting, string status)
    {
        if (posting == null) throw new ArgumentNullException(nameof(posting));
        await _db.Ado.ExecuteCommandAsync(
            "UPDATE ado_iqc_inventory_posting SET posting_status=@st, update_time=@now WHERE tenant_id=@t AND domain_code=@d AND fbillno=@fb",
            new SugarParameter("@st", status), new SugarParameter("@now", DateTime.Now),
            new SugarParameter("@t", posting.TenantId), new SugarParameter("@d", posting.DomainCode ?? ""),
            new SugarParameter("@fb", posting.FbillNo));
        posting.PostingStatus = status;
    }

    public async Task<bool> TryRecoverStaleAsync(long tenantId, string domainCode, string fbillNo, DateTime staleBefore, DateTime now)
    {
        // 单条件原子更新：仅 PROCESSING 且心跳过期者被抢占（rows=1）；并发多路仅一路命中，无先查后改窗口。
        var rows = await _db.Ado.ExecuteCommandAsync(
            "UPDATE ado_iqc_inventory_posting SET update_time=@now " +
            "WHERE tenant_id=@t AND domain_code=@d AND fbillno=@fb AND posting_status='PROCESSING' AND update_time < @stale",
            new SugarParameter("@now", now), new SugarParameter("@t", tenantId),
            new SugarParameter("@d", domainCode ?? ""), new SugarParameter("@fb", fbillNo),
            new SugarParameter("@stale", staleBefore));
        return rows == 1;
    }

    /// <summary>沿异常链识别 MySQL 唯一键冲突（1062 / Duplicate entry / 目标唯一索引名）。</summary>
    private static bool IsDuplicateKey(Exception ex)
    {
        for (var e = ex; e != null; e = e.InnerException)
        {
            var m = e.Message;
            if (!string.IsNullOrEmpty(m) &&
                (m.Contains("Duplicate entry") || m.Contains("1062") || m.Contains("uk_ado_iqc_posting_fbillno")))
                return true;
        }
        return false;
    }
}