using Microsoft.AspNetCore.Components;
using Microsoft.AspNetCore.Components.Web;
using DataConnection;
using DataConnection.EF;
using DataConnection.Interfaces;
using DataConnection.EF.DatabaseDiscovery;
using DataConnection.Enums;
using DataConnection.CredentialManagement;
using CredentialManager;
using Data_Coupler.Services;
using Data_Coupler.BackgroundServices;
using CredentialManager.Services;
using System;
using System.Threading.Tasks;

// Registra il provider di encoding per ExcelDataReader (necessario per file .xls)
System.Text.Encoding.RegisterProvider(System.Text.CodePagesEncodingProvider.Instance);

var builder = WebApplication.CreateBuilder(args);

// Configurazione per Windows Service
builder.Host.UseWindowsService(options =>
{
    options.ServiceName = "DataCouplerService";
});

// Add services to the container.
builder.Services.AddRazorPages();
builder.Services.AddServerSideBlazor();
builder.Services.AddWindowsService();

// Register Authentication Service
builder.Services.AddSingleton<Data_Coupler.Services.IAuthenticationService, Data_Coupler.Services.AuthenticationService>();

// Configurazione logging per Windows Service
if (OperatingSystem.IsWindows())
{
    builder.Logging.AddEventLog();
}

#region Database Directory Path management

string dbPath = string.Empty;

try
{
    if (OperatingSystem.IsWindows())
    {
        // Per servizi Windows, usa una cartella con permessi appropriati
        var appDataPath = Environment.GetFolderPath(Environment.SpecialFolder.CommonApplicationData);
        if (string.IsNullOrEmpty(appDataPath))
        {
            // Fallback per servizi Windows
            appDataPath = @"C:\ProgramData";
        }
        dbPath = Path.Combine(appDataPath, "Data_Coupler", "credentials.db");
    }
    else if (OperatingSystem.IsLinux())
    {
        dbPath = "/var/lib/Data_Coupler/credentials.db";
    }
    else if (OperatingSystem.IsMacOS())
    {
        dbPath = "/Library/Application Support/Data_Coupler/credentials.db";
    }

    var dbDirectory = Path.GetDirectoryName(dbPath);
    if (!Directory.Exists(dbDirectory))
    {
        Directory.CreateDirectory(dbDirectory!);
        
        // Per Windows, assicurati che la cartella abbia i permessi corretti
        if (OperatingSystem.IsWindows() && !string.IsNullOrEmpty(dbDirectory))
        {
            var directoryInfo = new DirectoryInfo(dbDirectory);
            // Imposta permessi per consentire l'accesso al servizio
        }
    }
    
    Console.WriteLine($"Database path: {dbPath}");
}
catch (Exception ex)
{
    Console.WriteLine($"Errore nella configurazione del percorso database: {ex.Message}");
    throw;
}

#endregion

#region OLD DB PATH
// // Add CredentialManager services
// var contentRoot = builder.Environment.ContentRootPath;
// var dataPath = Path.Combine(contentRoot, "wwwroot", "data");
// Directory.CreateDirectory(dataPath); // Assicurati che la directory esista
// var dbPath = Path.Combine(dataPath, "credentials.db");
#endregion

builder.Services.AddDataConnectionCredentialManagement($"Data Source={dbPath}");

// Register IHttpClientFactory
builder.Services.AddHttpClient();

// Register Data Connection Factory
builder.Services.AddScoped<IDataConnectionFactory, DataConnectionFactory>();

// Register Association Service (Pre-Discovery)
builder.Services.AddScoped<Data_Coupler.Services.IAssociationService, Data_Coupler.Services.AssociationService>();

// Register Backup Service
builder.Services.AddScoped<Data_Coupler.Services.IBackupService, Data_Coupler.Services.BackupService>();

// Register Schedule Services
builder.Services.AddScoped<IProfileScheduleService, ProfileScheduleService>();

// Register Data Transfer Service
builder.Services.AddScoped<Data_Coupler.Services.IDataTransferService, Data_Coupler.Services.DataTransferService>();

// Register Scheduled Profile Execution Service  
builder.Services.AddScoped<Data_Coupler.Services.IScheduledProfileExecutionService, Data_Coupler.Services.ScheduledProfileExecutionService>();

// Register Background Services (solo uno per evitare duplicazioni)
builder.Services.AddHostedService<Data_Coupler.BackgroundServices.ScheduledJobService>();

// Configurazione URL e timeout per servizio Windows
var urls = builder.Configuration.GetValue<string>("Urls") ?? "http://*:7550";
builder.WebHost.UseUrls(urls);

// Configurazione timeout per servizio Windows
builder.WebHost.ConfigureKestrel(serverOptions =>
{
    serverOptions.Limits.KeepAliveTimeout = TimeSpan.FromMinutes(10);
    serverOptions.Limits.RequestHeadersTimeout = TimeSpan.FromMinutes(5);
});

var app = builder.Build();

// Initialize database con timeout e retry
using (var scope = app.Services.CreateScope())
{
    var logger = scope.ServiceProvider.GetRequiredService<ILogger<Program>>();
    try
    {
        logger.LogInformation("Inizializzazione database in corso... Path: {DbPath}", dbPath);
        
        var dbInitializer = scope.ServiceProvider.GetRequiredService<CredentialManager.Services.IDatabaseInitializer>();
        
        // Inizializzazione con timeout di 60 secondi
        var initTask = dbInitializer.InitializeAsync();
        var timeoutTask = Task.Delay(TimeSpan.FromSeconds(60));
        
        var completedTask = await Task.WhenAny(initTask, timeoutTask);
        
        if (completedTask == timeoutTask)
        {
            logger.LogError("Timeout durante l'inizializzazione del database (60 secondi)");
            throw new TimeoutException("Timeout durante l'inizializzazione del database");
        }
        
        await initTask; // Attendi il completamento per eventuali eccezioni
        logger.LogInformation("Database inizializzato con successo.");
    }
    catch (Exception ex)
    {
        logger.LogError(ex, "Errore durante l'inizializzazione del database: {Message}. Path: {DbPath}", ex.Message, dbPath);
        
        // Per servizi Windows, log su Event Log
        if (OperatingSystem.IsWindows())
        {
            try
            {
                using var eventLog = new System.Diagnostics.EventLog("Application");
                eventLog.Source = "DataCouplerService";
                eventLog.WriteEntry($"Errore inizializzazione database: {ex.Message}", System.Diagnostics.EventLogEntryType.Error);
            }
            catch
            {
                // Ignora errori di scrittura EventLog
            }
        }
        
        throw; // Rilancia l'eccezione per non far partire l'app con un database non funzionante
    }
}

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    app.UseExceptionHandler("/Error");
    // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
    app.UseHsts();
}

app.UseHttpsRedirection();

app.UseStaticFiles();

app.UseRouting();

app.MapBlazorHub();
app.MapFallbackToPage("/_Host");

app.Run();