using System;
using System.IO;
using System.Net.Http;
using System.Text;
using System.Text.Json;
using System.Threading.Tasks;
using Deploymentcenter.Client;

namespace Deploymentcenter.TestClient;

class Program
{
    private static readonly string BaseUrl = "https://dc.mhdf.de";
    private static readonly HttpClient Client = new HttpClient(new HttpClientHandler
    {
        ServerCertificateCustomValidationCallback = (message, cert, chain, errors) => true
    });

    static async Task Main(string[] args)
    {
        Console.OutputEncoding = Encoding.UTF8;

        if (args.Length > 0)
        {
            await HandleCliArgsAsync(args);
            return;
        }

        Console.ForegroundColor = ConsoleColor.Cyan;
        Console.WriteLine("=================================================");
        Console.WriteLine(" 🚀 Deploymentcenter Unified Client Test Suite   ");
        Console.WriteLine("=================================================");
        Console.ResetColor();
        Console.WriteLine($" Server Base URL: {BaseUrl}\n");

        await TestHardwareIdV2ModuleAsync();
        await TestStateStoreHardeningAsync();
        await TestLicenseModuleAsync();
        await TestWatchdogModuleAsync();
        await TestUpdateServiceModuleAsync();

        Console.ForegroundColor = ConsoleColor.Green;
        Console.WriteLine("\n[✔] Alle Systemprüfungen erfolgreich abgeschlossen!");
        Console.ResetColor();
    }

    private static async Task HandleCliArgsAsync(string[] args)
    {
        string cmd = args[0].ToLowerInvariant();

        if (cmd == "--license-status")
        {
            var hwInfo = HardwareId.GetHardwareId("myapp");
            string storageDir = LicenseConfig.GetStorageDirectory("myapp");
            var cache = StateStore.Load("myapp", hwInfo.HardwareId);

            Console.ForegroundColor = ConsoleColor.Cyan;
            Console.WriteLine("=================================================");
            Console.WriteLine(" 🔑 Deploymentcenter Lizenz & HWID Status       ");
            Console.WriteLine("=================================================");
            Console.ResetColor();
            Console.WriteLine($" Platform:         {hwInfo.Platform.ToUpperInvariant()}");
            Console.WriteLine($" HWID v2:          {hwInfo.HardwareId}");
            Console.WriteLine($" HWID Source:      {hwInfo.HwidSource}");
            Console.WriteLine($" Legacy HWID (v1): {hwInfo.LegacyHardwareId}");
            Console.WriteLine($" Storage Directory:{storageDir}");
            Console.WriteLine($" Local Cache:      {(cache != null ? $"VALID (Status: {cache.Status}, Schema: {cache.SchemaVersion})" : "NONE / MISSING")}");
            return;
        }

        if (cmd == "--license-deactivate")
        {
            string key = args.Length > 1 ? args[1] : "LLAB1-98A72-B3C4D-5E6F7-89012";
            Console.WriteLine($"Deaktiviere Lizenz '{key}' für diesen Host...");
            var licClient = new LicenseClient(Client);
            bool success = await licClient.DeactivateAsync("myapp", key, BaseUrl, "dc_shared_master_secret");

            if (success)
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("✔ Lizenz-Aktivierung erfolgreich am Server aufgehoben!");
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("✖ Fehler bei der Lizenz-Deaktivierung.");
            }
            Console.ResetColor();
            return;
        }

        if (cmd == "--license-set-key")
        {
            if (args.Length < 2)
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("Fehler: Bitte Lizenzschlüssel angeben. Beispiel: --license-set-key LLAB1-XXXXX");
                Console.ResetColor();
                return;
            }
            string key = args[1].Trim();
            Console.WriteLine($"Prüfe neuen Lizenzschlüssel '{key}'...");
            var licClient = new LicenseClient(Client);
            var res = await licClient.ValidateAsync("myapp", key, BaseUrl);
            if (res.IsValid)
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine($"✔ Lizenz '{key}' erfolgreich aktiviert! Status: {res.Status}");
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine($"✖ Lizenzprüfung fehlgeschlagen: {res.Message} (Status: {res.Status})");
            }
            Console.ResetColor();
            return;
        }

        Console.WriteLine($"Unbekanntes Argument: {args[0]}");
        Console.WriteLine("Verfügbare Befehle:");
        Console.WriteLine("  --license-status");
        Console.WriteLine("  --license-deactivate [KEY]");
        Console.WriteLine("  --license-set-key <KEY>");
    }

    private static Task TestHardwareIdV2ModuleAsync()
    {
        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("1. Teste Modul: HardwareId v2 Berechnungen & Quellenerkennung...");
        Console.ResetColor();

        var hwInfo = HardwareId.GetHardwareId("myapp");
        Console.WriteLine($"   Platform:        {hwInfo.Platform}");
        Console.WriteLine($"   Hardware ID v2:  {hwInfo.HardwareId}");
        Console.WriteLine($"   HWID Source:     {hwInfo.HwidSource}");
        Console.WriteLine($"   Legacy HWID v1:  {hwInfo.LegacyHardwareId}");

        if (hwInfo.HardwareId.StartsWith("2:") && hwInfo.HardwareId.Length == 70)
        {
            Console.ForegroundColor = ConsoleColor.Green;
            Console.WriteLine("   ✔ Hardware-ID v2 Format validiert! (2:<plat>:<64 hex>)");
        }
        else
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("   ✖ Fehlerhaftes Hardware-ID v2 Format!");
        }
        Console.ResetColor();
        Console.WriteLine();
        return Task.CompletedTask;
    }

    private static Task TestStateStoreHardeningAsync()
    {
        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("2. Teste Modul: StateStore LLS2 AES-GCM Verschlüsselung & Integrität...");
        Console.ResetColor();

        string slug = "test_app_hardening";
        var hwInfo = HardwareId.GetHardwareId(slug);

        var testCache = new LocalCacheData
        {
            SchemaVersion = 2,
            ProductSlug = slug,
            LicenseKey = "LLAB-TEST-12345",
            HardwareId = hwInfo.HardwareId,
            Status = "valid",
            IssuedAt = DateTimeOffset.UtcNow.ToUnixTimeSeconds(),
            ExpiresAt = DateTimeOffset.UtcNow.AddDays(7).ToUnixTimeSeconds(),
            MaxSeenTime = DateTimeOffset.UtcNow.ToUnixTimeSeconds(),
            Checksum = hwInfo.HardwareId
        };

        bool saved = StateStore.Save(slug, hwInfo.HardwareId, testCache);
        var loaded = StateStore.Load(slug, hwInfo.HardwareId);

        if (saved && loaded != null && loaded.Status == "valid" && loaded.SchemaVersion == 2)
        {
            Console.ForegroundColor = ConsoleColor.Green;
            Console.WriteLine("   ✔ StateStore LLS2 AES-GCM Speicher & Entschlüsselung OK!");
        }
        else
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine("   ✖ Fehler beim StateStore Test!");
        }
        Console.ResetColor();
        Console.WriteLine();
        return Task.CompletedTask;
    }

    private static async Task TestLicenseModuleAsync()
    {
        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("3. Teste Modul: Lizenzen (Online Validation & v1 Migration)...");
        Console.ResetColor();

        try
        {
            var licClient = new LicenseClient(Client);
            var result = await licClient.ValidateAsync("myapp", "LLAB1-98A72-B3C4D-5E6F7-89012", BaseUrl);

            Console.WriteLine($"   Status:       {result.Status}");
            Console.WriteLine($"   Hardware ID:  {result.HardwareId}");
            Console.WriteLine($"   Message:      {result.Message}");

            if (result.IsValid)
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("   ✔ License Validation Server Test: ERFOLGREICH!");
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine($"   ✖ License Validation Server Test: {result.Message}");
            }
        }
        catch (Exception ex)
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine($"   ✖ Fehler beim Lizenzen-Test: {ex.Message}");
        }
        Console.ResetColor();
        Console.WriteLine();
    }

    private static async Task TestWatchdogModuleAsync()
    {
        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("4. Teste Modul: Watchdog (Heartbeat Ping)...");
        Console.ResetColor();

        try
        {
            var payload = new
            {
                source = "srv-db-01",
                instance = "default",
                type = "heartbeat",
                status = "ok",
                message = "C# Client Test Suite running smoothly",
                interval = 60,
                group = "TestRunner",
                os = OperatingSystemHelpers.GetPlatformCode()
            };

            string json = JsonSerializer.Serialize(payload);
            var content = new StringContent(json, Encoding.UTF8, "application/json");

            var request = new HttpRequestMessage(HttpMethod.Post, $"{BaseUrl}/api/watchdog/v1/ping")
            {
                Content = content
            };
            request.Headers.Add("X-Agent-Token", "wd_live_token_infra_01_secure");

            HttpResponseMessage response = await Client.SendAsync(request);
            string responseBody = await response.Content.ReadAsStringAsync();

            Console.WriteLine($"   HTTP Status: {(int)response.StatusCode} {response.StatusCode}");

            if (response.IsSuccessStatusCode)
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("   ✔ Watchdog Modul Test: ERFOLGREICH!");
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("   ✖ Watchdog Modul Test: FEHLER!");
            }
        }
        catch (Exception ex)
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine($"   ✖ Fehler beim Watchdog-Test: {ex.Message}");
        }
        Console.ResetColor();
        Console.WriteLine();
    }

    private static async Task TestUpdateServiceModuleAsync()
    {
        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine("5. Teste Modul: UpdateService (Release Check)...");
        Console.ResetColor();

        try
        {
            HttpResponseMessage response = await Client.GetAsync($"{BaseUrl}/api/updateservice/v1/check?product=myapp&version=1.0.0");
            string responseBody = await response.Content.ReadAsStringAsync();

            Console.WriteLine($"   HTTP Status: {(int)response.StatusCode} {response.StatusCode}");

            if (response.IsSuccessStatusCode)
            {
                Console.ForegroundColor = ConsoleColor.Green;
                Console.WriteLine("   ✔ UpdateService Modul Test: ERFOLGREICH!");
            }
            else
            {
                Console.ForegroundColor = ConsoleColor.Red;
                Console.WriteLine("   ✖ UpdateService Modul Test: FEHLER!");
            }
        }
        catch (Exception ex)
        {
            Console.ForegroundColor = ConsoleColor.Red;
            Console.WriteLine($"   ✖ Fehler beim UpdateService-Test: {ex.Message}");
        }
        Console.ResetColor();
        Console.WriteLine();
    }
}