using System;
using System.IO;
using System.Net;
using System.Net.Http;
using System.Runtime.InteropServices;
using Gott.Endpoints;
using Gott.Middleware;
using Gott.Services;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.StaticFiles;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.FileProviders;
using Microsoft.Extensions.Hosting;

var builder = WebApplication.CreateBuilder(args);

if (RuntimeInformation.IsOSPlatform(OSPlatform.Windows))
    builder.Services.AddWindowsService();

var dataDir = Path.Combine(AppContext.BaseDirectory, "data");
Directory.CreateDirectory(dataDir);

var dbPath = Path.Combine(dataDir, "gott.db");

// ServerSettingsService – zentrale Settings aus DB
var serverSettings = new ServerSettingsService(dbPath);
serverSettings.MigrateFromAppSettings(builder.Environment.ContentRootPath);
builder.Services.AddSingleton(serverSettings);

// Proxy (erfordert Neustart – wird nur beim Start gelesen)
var proxyUrl = serverSettings.Get("ProxyUrl");
if (!string.IsNullOrWhiteSpace(proxyUrl))
{
    builder.Services.AddHttpClient().ConfigureHttpClientDefaults(b =>
        b.ConfigurePrimaryHttpMessageHandler(() => new HttpClientHandler
        {
            Proxy = new WebProxy(proxyUrl),
            UseProxy = true
        }));
}
else
{
    builder.Services.AddHttpClient();
}

var authService = new AuthService(dbPath);
var dbService = new DatabaseService(dbPath);
dbService.EnsureDefaultUser(authService);

builder.Services.AddSingleton(authService);
builder.Services.AddSingleton(dbService);
builder.Services.AddSingleton(new ImageService());
builder.Services.AddSingleton(new StreamingTracker());
builder.Services.AddSingleton(new RemoteConnectionManager());
var memoryService = new MemoryService(dataDir);
var skillService = new SkillService(dataDir);
builder.Services.AddSingleton(memoryService);
builder.Services.AddSingleton(skillService);

// Shared Services
var toolService = new ToolService(serverSettings);
builder.Services.AddSingleton(toolService);
var chatService = new ChatService(dbService, toolService, memoryService, skillService, serverSettings);
builder.Services.AddSingleton(chatService);

// Embedding-Services (lokal, ONNX)
var embeddingModelDir = serverSettings.Get("EmbeddingModelDir");
var embeddingMaxSeq = serverSettings.GetInt("EmbeddingMaxSeqLen", 256);
var embeddingService = new Gott.Services.EmbeddingService(
    string.IsNullOrEmpty(embeddingModelDir)
        ? null
        : Path.Combine(dataDir, "models", embeddingModelDir),
    embeddingMaxSeq
);
builder.Services.AddSingleton(embeddingService);
var vectorSearchService = new Gott.Services.VectorSearchService(dbPath, embeddingService);
builder.Services.AddSingleton(vectorSearchService);
var embeddingBgService = new Gott.Services.EmbeddingBackgroundService(vectorSearchService, embeddingService, dbPath);
builder.Services.AddSingleton(embeddingBgService);
builder.Services.AddHostedService(sp => sp.GetRequiredService<Gott.Services.EmbeddingBackgroundService>());

// AnthropicService (Singleton – Token wird pro Request vom User aufgelöst)
builder.Services.AddSingleton<AnthropicService>(sp =>
{
    var svc = new AnthropicService(
        sp.GetRequiredService<IHttpClientFactory>(),
        toolService, dbService, memoryService,
        serverSettings,
        vectorSearch: vectorSearchService,
        embeddingBg: embeddingBgService);
    svc.SetChatService(chatService);
    return svc;
});

// OpenAI-kompatibler Service (Nvidia etc.)
builder.Services.AddSingleton<OpenAiService>(sp =>
    new OpenAiService(sp.GetRequiredService<IHttpClientFactory>(), dbService, sp.GetRequiredService<ToolService>(), serverSettings, dataDir));

// Telegram Bot (pro Session – Token aus Session-Config)
builder.Services.AddSingleton<TelegramService>(sp =>
    new TelegramService(
        sp.GetRequiredService<IHttpClientFactory>(),
        dbService, chatService,
        sp.GetRequiredService<AnthropicService>(),
        sp.GetRequiredService<OpenAiService>(),
        serverSettings));

// Krea Image Generation
builder.Services.AddSingleton(sp =>
    new KreaService(sp.GetRequiredService<IHttpClientFactory>(), serverSettings, dataDir));

// Cronjob-Service (BackgroundService)
builder.Services.AddSingleton<CronjobService>();
builder.Services.AddHostedService<CronjobService>(sp => sp.GetRequiredService<CronjobService>());

// Key-Scanner-Service (BackgroundService mit Timer)
builder.Services.AddSingleton<KeyScannerService>();
builder.Services.AddHostedService<KeyScannerService>(sp => sp.GetRequiredService<KeyScannerService>());

// GitHub Event Scanner (Echtzeit-Monitoring öffentlicher Pushes)
builder.Services.AddSingleton<GitHubEventScannerService>();
builder.Services.AddHostedService<GitHubEventScannerService>(sp => sp.GetRequiredService<GitHubEventScannerService>());

// Claude CLI Service (für OAuth-basierte Chats via CLI)
builder.Services.AddSingleton<ClaudeCliService>();

var app = builder.Build();

// No-cache for static files (mobile browsers love caching too much)
app.Use(async (context, next) =>
{
    var path = context.Request.Path.Value ?? "";
    if (path.EndsWith(".html") || path.EndsWith(".js") || path.EndsWith(".css") || path == "/")
    {
        var headers = context.Response.Headers;
        headers["Cache-Control"] = "no-cache, no-store, must-revalidate";
        headers["Pragma"] = "no-cache";
        headers["Expires"] = "0";
    }
    await next();
});

toolService.SetHttpClientFactory(app.Services.GetRequiredService<IHttpClientFactory>());
app.Services.GetRequiredService<AnthropicService>().SetTelegramService(app.Services.GetRequiredService<TelegramService>());
app.Services.GetRequiredService<AnthropicService>().SetOpenAiService(app.Services.GetRequiredService<OpenAiService>());
app.Services.GetRequiredService<AnthropicService>().SetCliService(app.Services.GetRequiredService<ClaudeCliService>());
await app.Services.GetRequiredService<OpenAiService>().LoadModelsAsync();
app.UseWebSockets();

// wwwroot: Quell-Verzeichnis bevorzugen (Live-Änderungen ohne Publish)
AppPaths.Initialize();
if (AppPaths.WwwRoot != Path.Combine(AppContext.BaseDirectory, "wwwroot"))
{
    var fileProvider = new PhysicalFileProvider(AppPaths.WwwRoot);
    app.UseDefaultFiles(new DefaultFilesOptions { FileProvider = fileProvider });
    app.UseStaticFiles(new StaticFileOptions { FileProvider = fileProvider });
}
else
{
    app.UseDefaultFiles();
    app.UseStaticFiles();
}

app.UseMiddleware<AuthMiddleware>();

app.MapAuthEndpoints();
app.MapChatEndpoint();
app.MapHistoryEndpoint();
app.MapSessionEndpoints();
app.MapAgentEndpoints();
app.MapWorkspaceEndpoint();
app.MapInfoEndpoint();
app.MapModelsEndpoint();
app.MapBackupEndpoint();
app.MapSkillEndpoints();
app.MapProfileEndpoints();
app.MapSettingsEndpoints();
app.MapTelegramEndpoints();
app.MapCronjobEndpoints();
app.MapKreaEndpoints();
app.MapSharedEndpoints();
app.MapAdminEndpoints();
app.MapServerSettingsEndpoints();
app.MapApiKeysEndpoints();
app.MapOpenClawEndpoints();
app.MapRemoteEndpoints();
app.MapDatabaseExplorerEndpoints();
app.MapEmbeddingDebugEndpoints();
app.MapInternalEndpoints();

var port = app.Configuration.GetValue<int>("Port", 19000);
app.Run($"http://0.0.0.0:{port}");