using Admin.NET.Plugin.AiDOP.Entity;
using Admin.NET.Plugin.AiDOP.SmartOps;
using Xunit;

namespace Admin.NET.Plugin.AiDOP.Tests.SmartOps;

public class S1KpiTargetSnapshotRefreshServiceTests
{
    private static S1KpiTargetSnapshotRefreshService Svc(FakeS1KpiDailySnapshotStore daily, FakeKpiTargetStore configs) =>
        new(daily, new KpiTargetResolver(configs, new LegacyKpiTargetProvider(new FakeDailyReader(), Microsoft.Extensions.Logging.Abstractions.NullLogger<LegacyKpiTargetProvider>.Instance), Microsoft.Extensions.Logging.Abstractions.NullLogger<KpiTargetResolver>.Instance));

    [Fact]
    public async Task FormalFactory_OverwritesLegacySnapshot_OnMaxBizDateOnly()
    {
        var daily = new FakeS1KpiDailySnapshotStore();
        daily.Add(1, 9, 1, new DateTime(2026, 8, 13), "S1_L1_001", 20.3m, 20m);
        daily.Add(1, 9, 1, new DateTime(2026, 8, 14), "S1_L1_001", 20.3m, 20m);
        daily.Add(2, 9, 1, new DateTime(2026, 8, 14), "S1_L2_001", 1m, 3m);
        var configs = new FakeKpiTargetStore();
        configs.Configs.Add(Cfg(11, 1, 10m, new DateTime(2026, 8, 14), metricCode: "S1_L1_001"));
        configs.Configs.Add(Cfg(12, 1, 10m, new DateTime(2026, 8, 14), metricCode: "S1_L2_001"));
        var result = await Svc(daily, configs).RefreshAsync(9, 1);
        Assert.True(result.Ok);
        Assert.Equal(2, result.UpdatedRows);
        Assert.Equal(10m, daily.Get(1, 9, 1, new DateTime(2026, 8, 14), "S1_L1_001").TargetValue);
        Assert.Equal(KpiTargetSnapshotSource.FormalFactory, daily.Get(1, 9, 1, new DateTime(2026, 8, 14), "S1_L1_001").TargetSource);
        Assert.Equal(11, daily.Get(1, 9, 1, new DateTime(2026, 8, 14), "S1_L1_001").TargetConfigId);
        Assert.Equal(20m, daily.Get(1, 9, 1, new DateTime(2026, 8, 13), "S1_L1_001").TargetValue);
        Assert.Equal(20.3m, daily.Get(1, 9, 1, new DateTime(2026, 8, 14), "S1_L1_001").MetricValue);
        Assert.Equal(10m, daily.Get(2, 9, 1, new DateTime(2026, 8, 14), "S1_L2_001").TargetValue);
    }

    [Fact]
    public async Task TenantDefault_UsedWhenFactoryMissing()
    {
        var daily = new FakeS1KpiDailySnapshotStore();
        daily.Add(1, 9, 1, DateTime.Today, "S1_L1_001", 8m, 20m);
        var configs = new FakeKpiTargetStore();
        configs.Configs.Add(Cfg(7, 0, 5m, DateTime.Today.AddDays(-10), metricCode: "S1_L1_001"));
        var result = await Svc(daily, configs).RefreshAsync(9, 1);
        Assert.Equal(1, result.UpdatedRows);
        Assert.Equal(5m, daily.Get(1, 9, 1, DateTime.Today, "S1_L1_001").TargetValue);
        Assert.Equal(KpiTargetSnapshotSource.FormalTenantDefault, daily.Get(1, 9, 1, DateTime.Today, "S1_L1_001").TargetSource);
    }

    [Fact]
    public async Task Missing_DoesNotOverwrite()
    {
        var daily = new FakeS1KpiDailySnapshotStore();
        daily.Add(1, 9, 1, DateTime.Today, "S5_L1_001", 8m, 20m);
        var result = await Svc(daily, new FakeKpiTargetStore()).RefreshAsync(9, 1);
        Assert.Equal(0, result.UpdatedRows);
        Assert.True(result.MissingRows >= 1);
        Assert.Equal(20m, daily.Get(1, 9, 1, DateTime.Today, "S5_L1_001").TargetValue);
        Assert.Null(daily.Get(1, 9, 1, DateTime.Today, "S5_L1_001").TargetSource);
    }

    [Fact]
    public async Task DoesNotTouchOtherTenantOrFactory()
    {
        var daily = new FakeS1KpiDailySnapshotStore();
        daily.Add(1, 9, 1, DateTime.Today, "S1_L1_001", 8m, 20m);
        daily.Add(1, 8, 1, DateTime.Today, "S1_L1_001", 8m, 20m);
        daily.Add(1, 9, 2, DateTime.Today, "S1_L1_001", 8m, 20m);
        var configs = new FakeKpiTargetStore();
        configs.Configs.Add(Cfg(1, 1, 10m, DateTime.Today.AddDays(-1), metricCode: "S1_L1_001"));
        await Svc(daily, configs).RefreshAsync(9, 1);
        Assert.Equal(10m, daily.Get(1, 9, 1, DateTime.Today, "S1_L1_001").TargetValue);
        Assert.Equal(20m, daily.Get(1, 8, 1, DateTime.Today, "S1_L1_001").TargetValue);
        Assert.Equal(20m, daily.Get(1, 9, 2, DateTime.Today, "S1_L1_001").TargetValue);
    }

    [Fact]
    public async Task LevelFailure_RollsBackAllLevels()
    {
        var daily = new FakeS1KpiDailySnapshotStore { FailOnLevel = 3 };
        daily.Add(1, 9, 1, DateTime.Today, "S1_L1_001", 8m, 20m);
        daily.Add(3, 9, 1, DateTime.Today, "S1_L3_001", 8m, 20m);
        var configs = new FakeKpiTargetStore();
        configs.Configs.Add(Cfg(1, 1, 10m, DateTime.Today.AddDays(-1), metricCode: "S1_L1_001"));
        configs.Configs.Add(Cfg(2, 1, 10m, DateTime.Today.AddDays(-1), metricCode: "S1_L3_001"));
        await Assert.ThrowsAsync<InvalidOperationException>(() => Svc(daily, configs).RefreshAsync(9, 1));
        Assert.Equal(20m, daily.Get(1, 9, 1, DateTime.Today, "S1_L1_001").TargetValue);
    }

    [Fact]
    public async Task NoDailyRows_ReturnsZero()
    {
        var result = await Svc(new FakeS1KpiDailySnapshotStore(), new FakeKpiTargetStore()).RefreshAsync(9, 1);
        Assert.True(result.Ok);
        Assert.Equal(0, result.UpdatedRows);
        Assert.Contains("暂无", result.Message);
    }

    private static AdoSmartOpsKpiTargetConfig Cfg(long id, long factoryId, decimal value, DateTime from, DateTime? to = null, string metricCode = "S1_L1_001") =>
        new()
        {
            Id = id,
            TenantId = 9,
            FactoryId = factoryId,
            MetricCode = metricCode,
            TargetValue = value,
            EffectiveFrom = from,
            EffectiveTo = to,
            SourceType = "MANUAL",
            Status = 1,
            CreateTime = DateTime.Now,
            UpdateTime = DateTime.Now
        };
}

internal sealed class FakeS1KpiDailySnapshotStore : IS1KpiDailySnapshotStore
{
    public int? FailOnLevel { get; set; }
    private readonly List<Row> _rows = new();

    public void Add(int level, long tenantId, long factoryId, DateTime bizDate, string metric, decimal metricValue, decimal? target)
        => _rows.Add(new Row
        {
            Level = level,
            TenantId = tenantId,
            FactoryId = factoryId,
            BizDate = bizDate.Date,
            MetricCode = metric,
            MetricValue = metricValue,
            TargetValue = target
        });

    public Row Get(int level, long tenantId, long factoryId, DateTime bizDate, string metric) =>
        _rows.Single(x => x.Level == level && x.TenantId == tenantId && x.FactoryId == factoryId && x.BizDate == bizDate.Date && x.MetricCode == metric);

    public async Task ExecuteInTransactionAsync(Func<Task> action, CancellationToken ct = default)
    {
        var backup = _rows.Select(x => x.Clone()).ToList();
        try
        {
            await action();
        }
        catch
        {
            _rows.Clear();
            _rows.AddRange(backup);
            throw;
        }
    }

    public Task<DateTime?> GetMaxBizDateAsync(int level, long tenantId, long factoryId, string moduleCode, CancellationToken ct = default)
    {
        _ = moduleCode;
        var dates = _rows.Where(x => x.Level == level && x.TenantId == tenantId && x.FactoryId == factoryId).Select(x => x.BizDate).ToList();
        DateTime? max = dates.Count == 0 ? null : dates.Max();
        return Task.FromResult(max);
    }

    public Task<List<S1KpiDailySnapshotRow>> ListLatestAsync(int level, long tenantId, long factoryId, DateTime bizDate, string moduleCode, CancellationToken ct = default)
    {
        _ = moduleCode;
        return Task.FromResult(_rows.Where(x => x.Level == level && x.TenantId == tenantId && x.FactoryId == factoryId && x.BizDate == bizDate.Date)
            .Select(x => new S1KpiDailySnapshotRow { MetricCode = x.MetricCode, BizDate = x.BizDate, MetricValue = x.MetricValue })
            .ToList());
    }

    public Task<int> UpdateTargetsAsync(int level, long tenantId, long factoryId, DateTime bizDate, string metricCode, KpiTargetSnapshot snap, string moduleCode, CancellationToken ct = default)
    {
        if (FailOnLevel == level)
            throw new InvalidOperationException($"fail level {level}");
        var hits = _rows.Where(x => x.Level == level && x.TenantId == tenantId && x.FactoryId == factoryId && x.BizDate == bizDate.Date && x.MetricCode == metricCode).ToList();
        foreach (var row in hits)
        {
            row.TargetValue = snap.TargetValue;
            row.TargetConfigId = snap.TargetConfigId;
            row.TargetSource = snap.TargetSource;
            row.TargetResolvedAt = snap.ResolvedAt;
        }
        return Task.FromResult(hits.Count);
    }

    internal sealed class Row
    {
        public int Level { get; set; }
        public long TenantId { get; set; }
        public long FactoryId { get; set; }
        public DateTime BizDate { get; set; }
        public string MetricCode { get; set; } = string.Empty;
        public decimal? MetricValue { get; set; }
        public decimal? TargetValue { get; set; }
        public long? TargetConfigId { get; set; }
        public string TargetSource { get; set; }
        public DateTime? TargetResolvedAt { get; set; }
        public Row Clone() => (Row)MemberwiseClone();
    }
}