using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;

namespace Luneraria.Core.Tests
{
    /// <summary>
    /// Console runner: dotnet run --project tools/dotnet/Luneraria.Core.Tests -- [suite ...]
    /// Writes the JSON protocol to $LUNE_TEST_REPORT (if set) and exits non-zero on any failure.
    /// Diagnostics: --float-probe out.json, --trace-mirror out.txt, --image scenario label out.png.
    /// </summary>
    public static class Program
    {
        public static int Main(string[] args)
        {
            string root = FindRoot();
            string golden = Path.Combine(root, "Assets/Luneraria/Tests/Core/Golden");
            if (args.Length == 4 && args[0] == "--image")
                return ReplayImage.Write(golden, args[1], args[2], Path.GetFullPath(args[3]));
            if (args.Length == 2 && args[0] == "--trace-mirror")
            {
                // Scenario mirror_match of Golden/scenarios.json, round 7 (docs/port/U1.5-UNITY.md).
                DivergenceTrace.Write(Path.GetFullPath(args[1]), 3, new[] { "glutpakt", "glutpakt", "glutpakt", "glutpakt", "glutpakt", "glutpakt" }, "verteidigung", 7);
                return 0;
            }
            if (args.Length == 2 && args[0] == "--float-probe")
            {
                string probeRuntime = System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription;
                string json = FloatProbe.Run(golden).ToJson(probeRuntime, probeRuntime + ", Release");
                File.WriteAllText(Path.GetFullPath(args[1]), json);
                Console.Write(json);
                return 0;
            }
            var wanted = new HashSet<string>(args);
            var report = new SuiteReport();
            foreach (CheckSuite suite in CheckSuite.All())
            {
                if (wanted.Count > 0 && !wanted.Contains(suite.Name))
                    continue;
                suite.GoldenDirectory = golden;
                var clock = Stopwatch.StartNew();
                bool ok = suite.Run();
                clock.Stop();
                report.Add(suite, clock.Elapsed.TotalSeconds);
                Console.WriteLine("LUNE_U1_{0} {1}: {2} checks; {3} failures ({4:0.0} s)", ok ? "PASS" : "FAIL", suite.Name, suite.Checks, suite.Failures.Count, clock.Elapsed.TotalSeconds);
                foreach (string failure in suite.Failures)
                    Console.WriteLine("  FAIL " + failure);
                foreach (string note in suite.Notes)
                    Console.WriteLine("  note " + note);
            }
            string runtime = System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription;
            if (SuiteReport.TargetPath != null)
                report.WriteTo(SuiteReport.TargetPath, runtime, runtime + ", Release");
            Console.WriteLine(report.Failures == 0 ? "LUNE_U1_TESTS_OK" : "LUNE_U1_TESTS_FAILED");
            return report.Failures == 0 ? 0 : 1;
        }

        static string FindRoot()
        {
            string dir = AppContext.BaseDirectory;
            while (dir != null && !Directory.Exists(Path.Combine(dir, "Assets/Luneraria")))
                dir = Path.GetDirectoryName(dir);
            return dir ?? Directory.GetCurrentDirectory();
        }
    }
}