using Domain.Entities.Stocks;
using MacroHandler = Application.Features.Api.Stocks.GetMacroIndicators.Handler;
using MacroQuery = Application.Features.Api.Stocks.GetMacroIndicators.Query;

namespace Application.Tests;

[TestClass]
public sealed class MacroIndicatorQueryHandlerTests
{
    [TestMethod]
    public async Task GetMacroIndicators_ByCode_ReturnsSeriesAscending_WithLatest()
    {
        // 기대 행위: 지정 Code 필터 + 시점 오름차순 Points + 최신값(마지막 시점)
        var code = $"CPI-{Guid.NewGuid():N}";

        using var db = TestDb.Create();
        await db.MacroIndicator.AddAsync(MacroIndicator.Create(code, "소비자물가지수", "202402", 113.78m, "2020＝100"));
        await db.MacroIndicator.AddAsync(MacroIndicator.Create(code, "소비자물가지수", "202401", 113.17m, "2020＝100"));
        await db.MacroIndicator.AddAsync(MacroIndicator.Create(code, "소비자물가지수", "202403", 114.30m, "2020＝100"));
        await db.SaveChangesAsync(default);

        var handler = new MacroHandler(db);

        var result = await handler.Handle(new MacroQuery([code], 0), default);

        var indicator = result.List.Single(c => c.Code == code);
        Assert.AreEqual("소비자물가지수", indicator.Name);
        Assert.AreEqual(3, indicator.Points.Count);
        Assert.AreEqual("202401", indicator.Points[0].Period, "시점 오름차순");
        Assert.AreEqual("202403", indicator.Points[^1].Period);
        Assert.AreEqual("202403", indicator.LatestPeriod);
        Assert.AreEqual(114.30m, indicator.LatestValue);
        Assert.AreEqual("2020＝100", indicator.Unit);
    }

    [TestMethod]
    public async Task GetMacroIndicators_Limit_TakesMostRecentPeriods()
    {
        var code = $"UNEMP-{Guid.NewGuid():N}";

        using var db = TestDb.Create();
        for (var m = 1; m <= 6; m++)
        {
            await db.MacroIndicator.AddAsync(MacroIndicator.Create(code, "실업률", $"20240{m}", 3.0m + m, "%"));
        }
        await db.SaveChangesAsync(default);

        var handler = new MacroHandler(db);

        var result = await handler.Handle(new MacroQuery([code], 2), default);

        var indicator = result.List.Single(c => c.Code == code);
        Assert.AreEqual(2, indicator.Points.Count, "Limit=2 → 최근 2시점");
        Assert.AreEqual("202405", indicator.Points[0].Period, "최근 2개를 오름차순으로");
        Assert.AreEqual("202406", indicator.Points[^1].Period);
        Assert.AreEqual("202406", indicator.LatestPeriod);
    }

    [TestMethod]
    public async Task GetMacroIndicators_EmptyCodes_ReturnsAllSeededCodes()
    {
        var codeA = $"A-{Guid.NewGuid():N}";
        var codeB = $"B-{Guid.NewGuid():N}";

        using var db = TestDb.Create();
        await db.MacroIndicator.AddAsync(MacroIndicator.Create(codeA, "가", "202401", 1m, null));
        await db.MacroIndicator.AddAsync(MacroIndicator.Create(codeB, "나", "202401", 2m, null));
        await db.SaveChangesAsync(default);

        var handler = new MacroHandler(db);

        var result = await handler.Handle(new MacroQuery([], 0), default);

        Assert.IsTrue(result.List.Any(c => c.Code == codeA));
        Assert.IsTrue(result.List.Any(c => c.Code == codeB));
    }
}