using MAX.Plugins;
using System.Reflection;
using MAX.Framework.DependencyInjection;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Hosting;
using Microsoft.AspNetCore.Mvc.ApplicationParts;
using Microsoft.AspNetCore.Mvc.Controllers;

if (args.ElementAtOrDefault(0) == "configuration") { ConfigurationChecks.Run(); return; }
if (args.ElementAtOrDefault(0) == "hangfire") { HangfireChecks.Run(); return; }

// Run each scenario in a fresh process: default ALC intentionally cannot unload plugins.
var finderType = typeof(ServiceCollectionExtensions).Assembly.GetType("MAX.Framework.DependencyInjection.StoreAppTypeFinder", true)!;
var finder = finderType.GetProperty("Current")!.GetValue(null);
var method = finderType.GetMethod("GetAssemblies", new[] { typeof(string) })!;
var mode = args.ElementAtOrDefault(1) ?? "plugins";
List<Assembly> assemblies;
try
{
    assemblies = (List<Assembly>)method.Invoke(finder, new object[] { args[0] == "-" ? null : args[0] })!;
}
catch (TargetInvocationException ex) when (mode == "failure" && ex.InnerException is InvalidOperationException)
{
    Console.WriteLine("PASS expected loading failure: " + ex.InnerException.Message);
    return;
}
if (mode == "failure") throw new Exception("Expected loading failure");
var plugins = assemblies.Where(a => a.GetName().Name is "Store.CloudProduct" or "Store.ImageCache").ToArray();
if (mode == "empty")
{
    if (plugins.Length != 0) throw new Exception("Unexpected plugins");
    Console.WriteLine("PASS empty/missing directory");
    return;
}
if (plugins.Length != (mode == "image" ? 1 : 2)) throw new Exception("Unexpected plugin count");
if (assemblies.Select(a => a.FullName).Distinct().Count() != assemblies.Count) throw new Exception("Duplicate assemblies");
var mvc = new ServiceCollection().AddControllers();
foreach (var plugin in plugins) mvc.AddApplicationPart(plugin);
var feature = new ControllerFeature();
mvc.PartManager.PopulateFeature(feature);
if (!feature.Controllers.Any(t => t.Name == "ImageCacheController")) throw new Exception("ImageCache controller missing");
if (mode != "image" && !feature.Controllers.Any(t => t.Name == "GoodsController")) throw new Exception("Goods controller missing");
if (mode is "image" or "plugins")
{
    var host = Host.CreateApplicationBuilder();
    var core = typeof(ServiceCollectionExtensions).GetMethod("AddStoreCore", BindingFlags.Static | BindingFlags.NonPublic)!;
    host.Configuration["Search:Url"] = "https://host.invalid";
    host.Configuration["ImageCache:ConnectionString"] = "host-only";
    core.Invoke(null, new object[] { host, plugins, new Dictionary<Type, object>() });
    if (host.Services.Any(d => d.ServiceType == typeof(Hangfire.JobStorage)))
        throw new Exception("Plugins must not register shared Hangfire storage");
    using var built = host.Build();
    var image = built.Services.GetRequiredKeyedService<PluginContext>("ImageCache");
    if (image.Configuration["ImageCache:ConnectionString"] is null or "host-only") throw new Exception("Image config isolation failed");
    if (image.Configuration["Search:Url"] != null) throw new Exception("Host settings leaked into ImageCache");
    if (host.Configuration["ImageCache:ConnectionString"] != "host-only") throw new Exception("Plugin modified host configuration");
    if (mode == "plugins")
    {
        var cloud = built.Services.GetRequiredKeyedService<PluginContext>("CloudProduct");
        if (cloud.Configuration["Search:Url"] is null or "https://host.invalid") throw new Exception("Cloud config isolation failed");
        if (host.Configuration["Search:Url"] != "https://host.invalid") throw new Exception("Cloud modified host configuration");
        foreach (var name in new[] { "OpenSearchService", "UserFavoritesIndexService", "RawDataStorage", "GoodsIndexJob", "GoodsViolationIndexJob", "GoodsService" })
        {
            var type = plugins.SelectMany(p => p.GetTypes()).Single(t => t.Name == name);
            using var scope = built.Services.CreateScope();
            scope.ServiceProvider.GetRequiredService(type);
        }
    }

    if (!host.Services.Any(d => d.ServiceType.Name == "ImageCacheService")) throw new Exception("Plugin DI registration missing");
    if (!host.Services.Any(d => d.ServiceKey is string key && key == "ImageCacheConnection")) throw new Exception("Plugin database registration missing");
    var registeredMvc = built.Services.GetRequiredService<ApplicationPartManager>();
    var registered = new ControllerFeature();
    registeredMvc.PopulateFeature(registered);
    if (!registered.Controllers.Any(t => t.Name == "ImageCacheController")) throw new Exception("Core MVC registration missing");
}
Console.WriteLine($"PASS plugins={plugins.Length}, controllers={feature.Controllers.Count}; dependencies/types loaded" + (mode is "image" or "plugins" ? "; isolated configuration/DI/plugin lifecycle/MVC registered" : ""));