using MAX.Plugins;
using Microsoft.Extensions.Hosting;

internal static class ConfigurationChecks
{
    public static void Run()
    {
        var tempRoot = Path.GetFullPath(Path.GetTempPath());
        var directory = Path.GetFullPath(Path.Combine(tempRoot, "StorePluginChecks-" + Guid.NewGuid().ToString("N")));
        Directory.CreateDirectory(directory);
        try
        {
            var environment = Host.CreateApplicationBuilder().Environment;
            environment.EnvironmentName = "PluginTest";
            var first = Path.Combine(directory, "First");
            var second = Path.Combine(directory, "Second");
            Directory.CreateDirectory(first);
            Directory.CreateDirectory(second);
            File.WriteAllText(Path.Combine(first, "appsettings.json"), """{"Shared":"first","Required":"present"}""");
            File.WriteAllText(Path.Combine(first, "appsettings.PluginTest.json"), """{"Shared":"environment"}""");
            File.WriteAllText(Path.Combine(second, "appsettings.json"), """{"Shared":"second"}""");
            using var a = new PluginContext("First", first, environment);
            using var b = new PluginContext("Second", second, environment);
            if (a.Configuration["Shared"] != "environment" || b.Configuration["Shared"] != "second")
                throw new Exception("Configuration isolation/environment override failed");
            if (a.RequireConfiguration("Required") != "present") throw new Exception("Required setting missing");
            try { b.RequireConfiguration("Required"); throw new Exception("Expected missing key failure"); }
            catch (InvalidOperationException ex) when (ex.Message.Contains("Second") && ex.Message.Contains("Required")) { }
            const string envKey = "Plugins__First__Shared";
            var previous = System.Environment.GetEnvironmentVariable(envKey);
            try
            {
                System.Environment.SetEnvironmentVariable(envKey, "specific-environment-variable");
                using var overridden = new PluginContext("First", first, environment);
                using var untouched = new PluginContext("Second", second, environment);
                if (overridden.Configuration["Shared"] != "specific-environment-variable" || untouched.Configuration["Shared"] != "second")
                    throw new Exception("Plugin environment variable isolation failed");
            }
            finally { System.Environment.SetEnvironmentVariable(envKey, previous); }
            var absent = Path.Combine(directory, "Absent");
            Directory.CreateDirectory(absent);
            try { using var invalid = new PluginContext("Absent", absent, environment); throw new Exception("Expected missing file failure"); }
            catch (FileNotFoundException) { }
            Console.WriteLine("PASS configuration isolation, environment overrides, missing file/key validation");
        }
        finally
        {
            if (!directory.StartsWith(tempRoot.TrimEnd(Path.DirectorySeparatorChar) + Path.DirectorySeparatorChar, StringComparison.OrdinalIgnoreCase))
                throw new InvalidOperationException("Unexpected fixture path");
            Directory.Delete(directory, recursive: true);
        }
    }
}