using ClosedXML.Excel;

namespace Gpulse.WCT.DataAnalyzer.Tests.Commands;

[TestFixture]
public class AnalyzeCommandTests : CommandTestBase
{
    /// <summary>
    /// 真实产线 .DAT：含 35 条两行 Ploss（1 条 FOD），全部恒等式成立，
    /// 余量与 delta_p' 反解在真实数据上应当与手算一致。
    /// 直接指向仓库根的 Resources 目录（gitignored，但本地存在）；CI 无此文件则跳过。
    /// </summary>
    [Test]
    public async Task Analyze_Ploss_RealVivoFile_GeneratesExcel()
    {
        var file = ResolveResourcesFile(
            "C车-单充快速成型件-A03-V55-vivo iQOD12 Pro-20250519-01.DAT");

        var outputDir = NewDir();
        var outputPath = Path.Combine(outputDir, "result.xlsx");

        var (code, stdout, _) = await Analyze().RunCaptureAsync(
            "--type", "ploss", "--file", file, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(stdout, Does.Contain("[OK]"));
            Assert.That(stdout, Does.Contain("Total: 35"));
            Assert.That(File.Exists(outputPath), Is.True);
        });
    }

    /// <summary>
    /// 真实产线 Qfod 标定：从「小米17功率上不去」文件中分离出纯手机与异物两段，
    /// 新建两个符合 FileNameParser 约定的 .log 文件：
    /// <list type="bullet">
    ///   <item>pure：前 21 条稳定读数，ΔQ=3~5</item>
    ///   <item>foreign：后 7 条衰减读数，ΔQ 为负值（-5 ~ -49）</item>
    /// </list>
    /// 阈值 = (pureMax + foreignMin) / 2 = (5 + -49) / 2 = -22
    /// </summary>
    [Test]
    public async Task Analyze_Qfod_RealXiaomiFiles_GeneratesExcel()
    {
        var pure = ResolveResourcesFile("rapidMold-v1.5-hex2_5-Xiaomi17-qfod_pure-20250817-1.log");
        var foreign = ResolveResourcesFile("rapidMold-v1.5-hex2_5-Xiaomi17-qfod_foreign-20250817-1.log");

        var outputDir = NewDir();
        var outputPath = Path.Combine(outputDir, "qfod_result.xlsx");

        var (code, stdout, _) = await Analyze().RunCaptureAsync(
            "--type", "qfod", "--pure", pure, "--foreign", foreign, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(stdout, Does.Contain("[OK]"));
            Assert.That(File.Exists(outputPath), Is.True);
        });
    }

    [Test]
    public async Task Analyze_NoType_ReturnsValidationError()
    {
        var (code, stdout, stderr) = await Analyze().RunCaptureAsync();

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(1));
            Assert.That(stdout + stderr, Does.Contain("--type"));
        });
    }

    [Test]
    public async Task Analyze_UnknownType_WithFile_PrintsMessage()
    {
        // 确保没有 Datas 文件夹干扰
        CleanupDatasAndOutput();
        var dir = NewDir();
        var file = TestFixtures.WritePlossLog(dir, "test.dat", new TestFixtures.PlossTwoLineRow(Field10: 350));

        var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "foo", "--file", file);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(stdout, Does.Contain("Unknown type: foo. Use 'ploss' or 'qfod'."));
        });
    }

    [Test]
    public async Task Analyze_Ploss_MissingFile_TriggersAutoScan()
    {
        // 不提供文件路径时触发自动扫描
        CleanupDatasAndOutput();

        var (_, stdout, _) = await Analyze().RunCaptureAsync("--type", "ploss");

        // 没有 Datas 文件夹时报错
        Assert.That(stdout, Does.Contain("未找到 Datas 文件夹"));
    }

    [Test]
    public async Task Analyze_Ploss_ValidTwoLineFile_GeneratesExcel()
    {
        var dir = NewDir();
        var file = TestFixtures.WritePlossLog(dir, TestFixtures.PlossFileName,
            // 正常两行：Field10=350（功率段），理论Δp = 6000-800-2200-500=2500
            new TestFixtures.PlossTwoLineRow(Field10: 350),
            // FOD 两行：Field10=500（功率段）
            new TestFixtures.PlossTwoLineRow(Field5: 8000, Field9: 2500, Field10: 500, Field12: 1));

        var outputDir = NewDir();
        var outputPath = Path.Combine(outputDir, "result.xlsx");

        var (code, stdout, _) = await Analyze().RunCaptureAsync(
            "--type", "ploss", "--file", file, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(stdout, Does.Contain("[OK]"));
            Assert.That(File.Exists(outputPath), Is.True);
        });
    }

    [Test]
    public async Task Analyze_Qfod_MissingArgs_TriggersAutoScan()
    {
        // 不提供文件路径时触发自动扫描
        CleanupDatasAndOutput();

        var (_, stdout, _) = await Analyze().RunCaptureAsync("--type", "qfod");

        // 没有 Datas 文件夹时报错
        Assert.That(stdout, Does.Contain("未找到 Datas 文件夹"));
    }

    [Test]
    public async Task Analyze_Qfod_ValidFiles_GeneratesExcel()
    {
        var dir = NewDir();
        var pure = TestFixtures.WriteQfodLog(
            dir, "singleMold-v1.0-hex2_1-iPhone15-qfod_pure-20260710-1.log", 20, 25, 21);
        var foreign = TestFixtures.WriteQfodLog(
            dir, "singleMold-v1.0-hex2_1-iPhone15-qfod_foreign-20260710-1.log", 42, 40, 45);

        var outputDir = NewDir();
        var outputPath = Path.Combine(outputDir, "qfod_result.xlsx");

        var (code, stdout, _) = await Analyze().RunCaptureAsync(
            "--type", "qfod", "--pure", pure, "--foreign", foreign, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(stdout, Does.Contain("[OK]"));
            Assert.That(File.Exists(outputPath), Is.True);
        });
    }

    [Test]
    public async Task Analyze_Qfod_MissingFile_ReportsFailure()
    {
        var dir = NewDir();
        var foreign = TestFixtures.WriteQfodLog(
            dir, "singleMold-v1.0-hex2_1-iPhone15-qfod_foreign-20260710-1.log", 42, 40);

        var (_, stdout, _) = await Analyze().RunCaptureAsync(
            "--type", "qfod",
            "--pure", Path.Combine(dir, "nope.log"),
            "--foreign", foreign);

        Assert.That(stdout, Does.Contain("FAILED"));
    }

    /// <summary>
    /// 在测试输出目录、以及从该目录向上一路找的仓库根 <c>Resources/</c> 中定位真实数据文件。
    /// 找不到时调用 <see cref="Assert.Ignore(string)"/> 跳过，CI 无产线 .DAT 时不会让用例变红。
    /// 与其它 fixture 模式不同：真实数据不复制到 bin/ —— 直接以相对仓库根的路径读取。
    /// </summary>
    private static string ResolveResourcesFile(string fileName)
    {
        // 1) 测试输出目录下的 Resources 副本（csproj 配置 CopyToOutputDirectory 时）
        var candidates = new List<string>
        {
            Path.Combine(AppContext.BaseDirectory, "Resources", fileName),
        };

        // 2) 从测试输出目录向上回溯寻找仓库根的 Resources 目录
        //    典型路径：…/tests/Gpulse.WCT.DataAnalyzer.Tests/bin/Debug/net8.0
        //              → 仓库根在这之上 5 级
        var dir = new DirectoryInfo(AppContext.BaseDirectory);
        for (int up = 0; up < 8 && dir != null; up++, dir = dir.Parent)
        {
            var candidate = Path.Combine(dir.FullName, "Resources", fileName);
            candidates.Add(candidate);
            if (File.Exists(candidate))
                return candidate;
        }

        Assert.Ignore($"真实数据文件不存在（已检索 {candidates.Count} 个候选路径）：{fileName}");
        return null!; // 不会执行
    }

    #region --auto 自动扫描测试

    /// <summary>
    /// 测试 --auto 自动扫描 Datas 文件夹并执行 Ploss 分析
    /// </summary>
    [Test]
    public async Task Analyze_Auto_Ploss_ScansDatasFolder()
    {
        // 创建 Datas 文件夹和测试文件
        var datasDir = Path.Combine(AppContext.BaseDirectory, "Datas");
        Directory.CreateDirectory(datasDir);

        TestFixtures.WritePlossLog(datasDir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-ploss_test-2026081701.dat",
            new TestFixtures.PlossTwoLineRow(Field10: 350));

        try
        {
            var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "ploss", "--auto");

            Assert.Multiple(() =>
            {
                Assert.That(code, Is.EqualTo(0));
                Assert.That(stdout, Does.Contain("扫描 Datas 文件夹"));
                Assert.That(stdout, Does.Contain("[完成] 已分析"));
            });
        }
        finally
        {
            if (Directory.Exists(datasDir)) Directory.Delete(datasDir, true);
        }
    }

    /// <summary>
    /// 测试 --auto 自动分类纯手机和异物日志
    /// </summary>
    [Test]
    public async Task Analyze_Auto_Qfod_ClassifiesPureAndForeign()
    {
        var datasDir = Path.Combine(AppContext.BaseDirectory, "Datas");
        Directory.CreateDirectory(datasDir);

        // 纯手机日志：异物类型 = 无
        TestFixtures.WriteQfodLog(datasDir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-qfod_pure-2026081701.log", 20, 25, 21);
        // 异物日志：异物类型 = 硬币
        TestFixtures.WriteQfodLog(datasDir, "奇瑞-E5-singleMold-A00-V001-iPhone15-硬币-qfod_foreign-2026081701.log", -5, -10, -15);

        try
        {
            var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "qfod", "--auto");

            Assert.Multiple(() =>
            {
                Assert.That(code, Is.EqualTo(0));
                // 验证能识别纯手机和异物
                Assert.That(stdout, Does.Contain("纯手机:"));
                Assert.That(stdout, Does.Contain("异物:"));
            });
        }
        finally
        {
            if (Directory.Exists(datasDir)) Directory.Delete(datasDir, true);
        }
    }

    /// <summary>
    /// 测试 --auto 时 Datas 文件夹不存在
    /// </summary>
    [Test]
    public async Task Analyze_Auto_NoDatasFolder_ReportsError()
    {
        CleanupDatasAndOutput();

        var (_, stdout, _) = await Analyze().RunCaptureAsync("--type", "ploss", "--auto");

        Assert.That(stdout, Does.Contain("未找到 Datas 文件夹"));
    }

    #endregion

    #region 输出目录结构测试

    /// <summary>
    /// 测试输出目录结构：Output/{车厂}/{车型}/{手机名}/{文件名}.xlsx
    /// </summary>
    [Test]
    public async Task Analyze_Ploss_CreatesOutputDirectoryStructure()
    {
        CleanupDatasAndOutput();

        var dir = NewDir();
        var file = TestFixtures.WritePlossLog(dir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-ploss_test-2026081701.dat",
            new TestFixtures.PlossTwoLineRow(Field10: 350));

        var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "ploss", "--file", file);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            // 验证输出路径包含车厂/车型/手机名
            Assert.That(stdout, Does.Contain("Output"));
            Assert.That(stdout, Does.Contain("奇瑞"));
            Assert.That(stdout, Does.Contain("E5"));
            Assert.That(stdout, Does.Contain("iPhone15"));
        });
    }

    #endregion

    #region Qfod ΔQ 绝对值统计测试

    /// <summary>
    /// 测试 Qfod 统计使用绝对值，阈值用有符号 ΔQ（见使用指南 Threshold=-22 样例）。
    /// 本用例 pure ΔQ=-20,-25,-21，foreign ΔQ=30,35,40 → pureMax=-20, foreignMin=30，
    /// 阈值 = (-20 + 30) / 2 = 5（有符号）。断言行7标定Q值单元格 == 5。
    /// </summary>
    [Test]
    public async Task Analyze_Qfod_WithNegativeValues_GeneratesExcel()
    {
        CleanupDatasAndOutput();

        var dir = NewDir();
        // 包含负值 ΔQ
        var pure = TestFixtures.WriteQfodLog(dir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-qfod_pure-2026081701.log", -20, -25, -21);
        var foreign = TestFixtures.WriteQfodLog(dir, "奇瑞-E5-singleMold-A00-V001-iPhone15-硬币-qfod_foreign-2026081701.log", 30, 35, 40);

        var outputDir = NewDir();
        var outputPath = Path.Combine(outputDir, "result.xlsx");

        var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "qfod", "--pure", pure, "--foreign", foreign, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(stdout, Does.Contain("[OK]"));
            Assert.That(File.Exists(outputPath), Is.True);
        });

        // 读回 Excel：行6 标定Q值（Q0 列 col=2）应为有符号阈值 5
        using var workbook = new XLWorkbook(outputPath);
        var ws = workbook.Worksheet("Sheet1");
        Assert.Multiple(() =>
        {
            Assert.That(ws.Cell(6, 1).GetString(), Is.EqualTo("标定Q值"));  // 行6 是标定Q值行
            // Q0 在行6合并了三列，值在合并后的第一个单元格
            Assert.That((int)ws.Cell(6, 2).GetDouble(), Is.EqualTo(5));
        });
    }

    #endregion

    #region Ploss 标定值计算测试

    /// <summary>
    /// 测试 Ploss 标定值计算：标定Δp = 理论Δp最大值 + a
    /// 功率段 350 的 a 值为 3000。理论Δp = 6000-(800+2200+500) = 2500 → 标定 = 5500。
    /// 读回 Excel 校验行7标定Δp单元格（350 段 col=2）== 5500。
    /// </summary>
    [Test]
    public async Task Analyze_Ploss_CalculatesCalibrationValue()
    {
        CleanupDatasAndOutput();

        var dir = NewDir();
        // 创建功率段 350 的数据
        // 理论Δp = Field5 - (Field4 + PowLoss + Field9) = 6000 - (800 + 2200 + 500) = 2500
        var file = TestFixtures.WritePlossLog(dir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-ploss_test-2026081701.dat",
            new TestFixtures.PlossTwoLineRow(Field10: 350));

        var outputDir = NewDir();
        var outputPath = Path.Combine(outputDir, "result.xlsx");

        var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "ploss", "--file", file, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(File.Exists(outputPath), Is.True);
            Assert.That(stdout, Does.Contain("Total: 1"));
            Assert.That(stdout, Does.Contain("Dropped: 0"));
        });

        // 读回 Excel：行1 列2 含功率段 350；行6 标定Δp值（col=2）= 2500 + 3000 = 5500
        using var workbook = new XLWorkbook(outputPath);
        var ws = workbook.Worksheet("Sheet1");
        Assert.Multiple(() =>
        {
            Assert.That((int)ws.Cell(1, 2).GetDouble(), Is.EqualTo(350));  // 行1 是功率段标题行
            Assert.That(ws.Cell(6, 1).GetString(), Is.EqualTo("标定Δp值"));  // 行6 是标定行
            Assert.That((long)ws.Cell(6, 2).GetDouble(), Is.EqualTo(5500L));
        });
    }

    /// <summary>
    /// RV-004：Field10 非标准功率段的记录应计入 DroppedCount 并在 stdout 暴露，
    /// 而非静默丢弃。
    /// </summary>
    [Test]
    public async Task Analyze_Ploss_NonStandardPowerSegment_IsDropped()
    {
        CleanupDatasAndOutput();

        var dir = NewDir();
        // Field10=850 不在 9 个标准功率段内 → 被丢弃
        var file = TestFixtures.WritePlossLog(dir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-ploss_test-2026081701.dat",
            new TestFixtures.PlossTwoLineRow(Field10: 850));

        var outputDir = NewDir();
        var outputPath = Path.Combine(outputDir, "result.xlsx");

        var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "ploss", "--file", file, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(File.Exists(outputPath), Is.True);
            Assert.That(stdout, Does.Contain("Total: 1"));
            Assert.That(stdout, Does.Contain("Dropped: 1"));
        });
    }

    /// <summary>
    /// RV-002：pure/foreign 日志存在但未提取到 Qfod 行 → 空记录守卫应返回失败而非从 0 起算成功。
    /// </summary>
    [Test]
    public async Task Analyze_Qfod_EmptyRecords_ReportsFailure()
    {
        CleanupDatasAndOutput();

        var dir = NewDir();
        // 写一个只有空白行的"空"日志（文件存在但无 Qfod 行）
        var pure = Path.Combine(dir, "pure_empty.log");
        var foreign = Path.Combine(dir, "foreign_empty.log");
        await File.WriteAllTextAsync(pure, "\n\n  \n");
        await File.WriteAllTextAsync(foreign, "\n\n  \n");

        var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "qfod", "--pure", pure, "--foreign", foreign);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(stdout, Does.Contain("FAILED"));
            Assert.That(stdout, Does.Contain("未提取到 Qfod"));
        });
    }

    /// <summary>
    /// RV-006：--output 指向不存在的嵌套目录时应自动创建而非崩溃。
    /// </summary>
    [Test]
    public async Task Analyze_Ploss_OutputToMissingDir_CreatesDir()
    {
        CleanupDatasAndOutput();

        var dir = NewDir();
        var file = TestFixtures.WritePlossLog(dir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-ploss_test-2026081701.dat",
            new TestFixtures.PlossTwoLineRow(Field10: 350));

        var outputRoot = NewDir();
        var outputPath = Path.Combine(outputRoot, "nested", "deeper", "result.xlsx");
        Assume.That(Directory.Exists(Path.GetDirectoryName(outputPath)), Is.False);

        var (code, _, _) = await Analyze().RunCaptureAsync("--type", "ploss", "--file", file, "--output", outputPath);

        Assert.Multiple(() =>
        {
            Assert.That(code, Is.EqualTo(0));
            Assert.That(File.Exists(outputPath), Is.True);
        });
    }

    /// <summary>
    /// RV-005：--auto 多文件其中一文件损坏（无法解析）不应中止整批；其余文件仍产出 [OK]，
    /// 且 stdout 含 [FAILED] 与最终 [完成] 汇总。
    /// </summary>
    [Test]
    public async Task Analyze_Auto_Ploss_OneBadFile_DoesNotAbortBatch()
    {
        // 准备 Datas 文件夹：一个好文件 + 一个坏文件（只有 header 无 FOD 行）
        var dataDir = Path.Combine(AppContext.BaseDirectory, "Datas");
        try
        {
            Directory.CreateDirectory(dataDir);
            TestFixtures.WritePlossLog(dataDir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-ploss_test-2026081701.dat",
                new TestFixtures.PlossTwoLineRow(Field10: 350));
            // 坏文件：仅 header 行，无配对 FOD 行 → 解析错误计数
            var badPath = Path.Combine(dataDir, "奇瑞-E5-singleMold-A00-V001-iPhone15-无-badfile-2026081702.dat");
            await File.WriteAllTextAsync(badPath, "pow_loss = 2200, delta_p = 2500\n");

            var (code, stdout, _) = await Analyze().RunCaptureAsync("--type", "ploss", "--auto");

            Assert.Multiple(() =>
            {
                Assert.That(code, Is.EqualTo(0));
                Assert.That(stdout, Does.Contain("[OK]"));
                Assert.That(stdout, Does.Contain("[完成]"));
            });
        }
        finally
        {
            if (Directory.Exists(dataDir)) Directory.Delete(dataDir, true);
        }
    }

    #endregion
}