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

namespace Luneraria.Core.Tests
{
    /// <summary>
    /// Console runner: dotnet run --project tools/dotnet/Luneraria.Core.Tests -- [suite ...]
    /// Writes docs/port/logs/u1/core-tests.json and exits non-zero on any failure.
    /// </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]));
            var wanted = new HashSet<string>(args);
            var report = new StringBuilder("{\n  \"suites\": [\n");
            int failures = 0;
            bool first = true;
            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();
                failures += suite.Failures.Count;
                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);
                report.Append(first ? "" : ",\n");
                first = false;
                report.AppendFormat("    {{\"suite\": \"{0}\", \"checks\": {1}, \"failures\": {2}, \"seconds\": {3:0.00}, \"failed\": [{4}], \"notes\": [{5}]}}",
                    suite.Name, suite.Checks, suite.Failures.Count, clock.Elapsed.TotalSeconds, Join(suite.Failures), Join(suite.Notes));
            }
            report.Append("\n  ],\n  \"runtime\": \"" + System.Runtime.InteropServices.RuntimeInformation.FrameworkDescription + "\",\n");
            report.Append("  \"os\": \"" + System.Runtime.InteropServices.RuntimeInformation.OSDescription + " " + System.Runtime.InteropServices.RuntimeInformation.ProcessArchitecture + "\"\n}\n");
            if (wanted.Count == 0)
            {
                string logs = Path.Combine(root, "docs/port/logs/u1");
                Directory.CreateDirectory(logs);
                File.WriteAllText(Path.Combine(logs, "core-tests.json"), report.ToString());
            }
            Console.WriteLine(failures == 0 ? "LUNE_U1_TESTS_OK" : "LUNE_U1_TESTS_FAILED");
            return failures == 0 ? 0 : 1;
        }

        static string Join(List<string> values)
        {
            var parts = new List<string>();
            foreach (string value in values)
                parts.Add("\"" + value.Replace("\\", "\\\\").Replace("\"", "\\\"").Replace("\n", "\\n") + "\"");
            return string.Join(", ", parts);
        }

        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();
        }
    }
}