using System.Text.Json;
using Recordingtest.Runner;
using Xunit;

namespace Recordingtest.Runner.Tests;

public class TestRunnerTests : IDisposable
{
    private readonly string _root;

    public TestRunnerTests()
    {
        _root = Path.Combine(Path.GetTempPath(), "rt-runner-" + Guid.NewGuid().ToString("N"));
        Directory.CreateDirectory(_root);
    }

    public void Dispose()
    {
        try { Directory.Delete(_root, true); } catch { }
    }

    private (string scenariosDir, string baselinesDir, string outDir) MakeDirs()
    {
        var s = Path.Combine(_root, "scenarios");
        var b = Path.Combine(_root, "baselines");
        var o = Path.Combine(_root, "out");
        Directory.CreateDirectory(s);
        Directory.CreateDirectory(b);
        Directory.CreateDirectory(o);
        return (s, b, o);
    }

    private static string ScenarioYaml(string name) => $@"name: {name}
description: test
sut:
  exe: dummy.exe
steps:
  - kind: save
    value: ctrl+s
";

    private static void WriteScenario(string dir, string name)
        => File.WriteAllText(Path.Combine(dir, name + ".yaml"), ScenarioYaml(name));

    [Fact]
    public void TwoScenarios_BothIdentical_ExitZero_AllPass()
    {
        var (sDir, bDir, oDir) = MakeDirs();
        WriteScenario(sDir, "alpha");
        WriteScenario(sDir, "beta");
        var content = "{\"x\":1}";
        File.WriteAllText(Path.Combine(bDir, "alpha.json"), content);
        File.WriteAllText(Path.Combine(bDir, "beta.json"), content);

        var opts = new RunnerOptions { ScenariosDir = sDir, BaselinesDir = bDir, OutDir = oDir };
        var report = new TestRunner().RunAll(opts, new FakeHostFactory(content), new SpyNormalizer(), new StubDiffer(identical: true));

        Assert.Equal(2, report.Total);
        Assert.Equal(2, report.Passed);
        Assert.Equal(0, report.Failed);
        Assert.Equal(0, TestRunner.ToExitCode(report));
    }

    [Fact]
    public void OneScenarioDiffers_ExitOne_HunkCount()
    {
        var (sDir, bDir, oDir) = MakeDirs();
        WriteScenario(sDir, "alpha");
        var content = "{\"x\":1}";
        File.WriteAllText(Path.Combine(bDir, "alpha.json"), content);

        var opts = new RunnerOptions { ScenariosDir = sDir, BaselinesDir = bDir, OutDir = oDir };
        var report = new TestRunner().RunAll(opts, new FakeHostFactory(content), new SpyNormalizer(), new StubDiffer(identical: false, hunkCount: 1));

        Assert.Equal(1, TestRunner.ToExitCode(report));
        Assert.Equal("fail", report.Scenarios[0].Status);
        Assert.Equal(1, report.Scenarios[0].Hunks);
    }

    [Fact]
    public void PlayerThrows_ExitTwo_ErrorStatus()
    {
        var (sDir, bDir, oDir) = MakeDirs();
        // scenario with a click step so the throw triggers
        var name = "boom";
        var yaml = @"name: boom
sut:
  exe: dummy.exe
steps:
  - kind: click
    target:
      uia_path: /Window
      offset: [0.5, 0.5]
";
        File.WriteAllText(Path.Combine(sDir, name + ".yaml"), yaml);

        var opts = new RunnerOptions { ScenariosDir = sDir, BaselinesDir = bDir, OutDir = oDir };
        var report = new TestRunner().RunAll(opts, new FakeHostFactory("{}", throwOnClick: true), new SpyNormalizer(), new StubDiffer(identical: true));

        Assert.True(report.Errored >= 1);
        Assert.Equal(2, TestRunner.ToExitCode(report));
    }

    [Fact]
    public void EmptyScenariosDir_ExitZero_TotalZero()
    {
        var (sDir, bDir, oDir) = MakeDirs();
        var opts = new RunnerOptions { ScenariosDir = sDir, BaselinesDir = bDir, OutDir = oDir };
        var report = new TestRunner().RunAll(opts, new FakeHostFactory("{}"), new SpyNormalizer(), new StubDiffer(identical: true));
        Assert.Equal(0, report.Total);
        Assert.Equal(0, TestRunner.ToExitCode(report));
    }

    [Fact]
    public void ProfileOverride_IsPassedToNormalizer()
    {
        var (sDir, bDir, oDir) = MakeDirs();
        WriteScenario(sDir, "alpha");
        var content = "{\"x\":1}";
        File.WriteAllText(Path.Combine(bDir, "alpha.json"), content);

        var spy = new SpyNormalizer();
        var opts = new RunnerOptions { ScenariosDir = sDir, BaselinesDir = bDir, OutDir = oDir, Profile = "strict" };
        new TestRunner().RunAll(opts, new FakeHostFactory(content), spy, new StubDiffer(identical: true));

        Assert.Contains("strict", spy.Profiles);
        Assert.DoesNotContain("default", spy.Profiles);
    }

    [Fact]
    public void ReportJson_HasExpectedSchema_And_ReportMd_Exists()
    {
        var (sDir, bDir, oDir) = MakeDirs();
        WriteScenario(sDir, "alpha");
        var content = "{\"x\":1}";
        File.WriteAllText(Path.Combine(bDir, "alpha.json"), content);

        var opts = new RunnerOptions { ScenariosDir = sDir, BaselinesDir = bDir, OutDir = oDir };
        new TestRunner().RunAll(opts, new FakeHostFactory(content), new SpyNormalizer(), new StubDiffer(identical: true));

        var jsonPath = Path.Combine(oDir, "report.json");
        var mdPath = Path.Combine(oDir, "report.md");
        Assert.True(File.Exists(jsonPath));
        Assert.True(File.Exists(mdPath));

        using var doc = JsonDocument.Parse(File.ReadAllText(jsonPath));
        var root = doc.RootElement;
        Assert.True(root.TryGetProperty("runAt", out _));
        Assert.True(root.TryGetProperty("total", out _));
        Assert.True(root.TryGetProperty("passed", out _));
        Assert.True(root.TryGetProperty("failed", out _));
        Assert.True(root.TryGetProperty("errored", out _));
        Assert.True(root.TryGetProperty("scenarios", out var scenarios));
        var first = scenarios[0];
        Assert.True(first.TryGetProperty("name", out _));
        Assert.True(first.TryGetProperty("status", out _));
        Assert.True(first.TryGetProperty("hunks", out _));
        Assert.True(first.TryGetProperty("checkpointCount", out _));
        Assert.True(first.TryGetProperty("artifactDir", out _));
    }
}