using Infrastructure.StockData;

namespace Application.Tests;

[TestClass]
public sealed class MarketQuoteParserTests
{
    [TestMethod]
    public void Parse_WithVolume_MapsFields_LowercasesSymbol()
    {
        // Stooq 라이트 배치(/q/l/?f=sd2t2ohlcv&h&e=csv) — 헤더 + 2행 (거래량 포함)
        const string csv = """
        Symbol,Date,Time,Open,High,Low,Close,Volume
        AAPL.US,2026-07-07,22:00:00,210.50,213.00,209.10,212.30,54812000
        MSFT.US,2026-07-07,22:00:00,430,435.5,428,433.2,21500000
        """;

        var rows = MarketQuoteCsvParser.Parse(csv);

        Assert.AreEqual(2, rows.Count);

        var aapl = rows[0];
        Assert.AreEqual("aapl.us", aapl.Symbol, "심볼은 소문자 정규화");
        Assert.AreEqual(new DateOnly(2026, 7, 7), aapl.TradeDate);
        Assert.AreEqual(210.50m, aapl.Open);
        Assert.AreEqual(212.30m, aapl.Close);
        Assert.AreEqual(54812000L, aapl.Volume);

        Assert.AreEqual(433.2m, rows[1].Close);
        Assert.AreEqual(21500000L, rows[1].Volume);
    }

    [TestMethod]
    public void Parse_MissingVolume_DefaultsZero_MissingClose_SkipsRow()
    {
        // 첫 행: Close 가 N/D → 버림. 둘째 행: 7컬럼(볼륨 미제공) + OHLC N/D → OHLC 는 Close 보정, Volume 0.
        const string csv = """
        Symbol,Date,Time,Open,High,Low,Close
        ^BAD,N/D,N/D,N/D,N/D,N/D,N/D
        GOLD.F,2026-07-07,20:00:00,N/D,N/D,N/D,2410.5
        """;

        var rows = MarketQuoteCsvParser.Parse(csv);

        Assert.AreEqual(1, rows.Count, "Close 결측(N/D) 행은 제외");
        var gold = rows[0];
        Assert.AreEqual("gold.f", gold.Symbol);
        Assert.AreEqual(2410.5m, gold.Close);
        Assert.AreEqual(2410.5m, gold.Open, "OHLC 결측은 Close 로 보정");
        Assert.AreEqual(0L, gold.Volume, "볼륨 미제공은 0");
    }

    [TestMethod]
    public void Parse_EmptyOrHeaderOnly_ReturnsEmpty()
    {
        Assert.AreEqual(0, MarketQuoteCsvParser.Parse("").Count);
        Assert.AreEqual(0, MarketQuoteCsvParser.Parse("   ").Count);
        Assert.AreEqual(0, MarketQuoteCsvParser.Parse("Symbol,Date,Time,Open,High,Low,Close,Volume").Count, "헤더만 있으면 0건");
    }
}