using NUnit.Framework;

using MultiversalDiplomacy.Model;
using MultiversalDiplomacy.Script;

namespace MultiversalDiplomacyTests;

public class ScriptTests
{
    static IEnumerable<TestCaseData> DatcTestCases()
    {
        foreach (var path in Directory.EnumerateFiles("Scripts/DATC"))
        {
            yield return new TestCaseData(path)
                .SetName($"{{m}}({Path.GetFileNameWithoutExtension(path)})");
        }
    }

    [TestCaseSource(nameof(DatcTestCases))]
    public void Test_DATC(string testScriptPath)
    {
        string filename = Path.GetFileName(testScriptPath);
        int line = 0;
        bool expectFailure = false;

        IScriptHandler handler = new SetupScriptHandler(
            (msg) => {/* discard */},
            World.WithStandardMap(),
            Adjudicator.MovementPhase);

        foreach (string input in File.ReadAllLines(testScriptPath)) {
            line++;

            // Handle test directives
            if (input == "#test:skip") {
                Assert.Ignore($"Script {filename} skipped at line {line}");
            }
            if (input == "#test:fails") {
                expectFailure = true;
                continue;
            }

            var result = handler.HandleInput(input);
            if (expectFailure && result.Success) throw new AssertionException(
                $"Script {filename} expected line {line} to fail, but it succeeded");
            if (!expectFailure && !result.Success) throw new AssertionException(
                $"Script {filename} error at line {line}: {result.Message}");
            if (result.NextHandler is null) throw new AssertionException(
                $"Script {filename} quit unexpectedly at line {line}: \"{input}\"");

            handler = result.NextHandler;
            expectFailure = false;
        }
    }
}