using BirthList.Infrastructure.Persistence;
using BirthList.Web.Authorization;
using BirthList.Web.Configuration;
using BirthList.Web.Features.Registries;
using BirthList.Web.Services;
using Microsoft.AspNetCore.Components.Authorization;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Storage;
using BirthList.Web.Components;
using BirthList.Web.Components.Account;
using BirthList.Web.Data;
using System.Data;

var builder = WebApplication.CreateBuilder(args);

// Add services to the container.
builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents();

builder.Services.AddHttpClient("RegistryMetadata", client =>
{
    client.Timeout = TimeSpan.FromSeconds(10);
});
builder.Services.Configure<SmtpOptions>(builder.Configuration.GetSection("Smtp"));

builder.Services.AddCascadingAuthenticationState();
builder.Services.AddScoped<IdentityUserAccessor>();
builder.Services.AddScoped<IdentityRedirectManager>();
builder.Services.AddScoped<AuthenticationStateProvider, IdentityRevalidatingAuthenticationStateProvider>();
builder.Services.AddScoped<RegistryAuthorizationService>();
builder.Services.AddScoped<OwnerBootstrapService>();
builder.Services.AddScoped<RegistryService>();
builder.Services.AddScoped<RegistryMetadataService>();
builder.Services.AddScoped<RegistryThemeService>();
builder.Services.AddScoped<RegistryUserContext>();
builder.Services.AddScoped<SmtpConfigurationStatusService>();

var googleClientId = builder.Configuration["Authentication:Google:ClientId"];
var googleClientSecret = builder.Configuration["Authentication:Google:ClientSecret"];
var microsoftClientId = builder.Configuration["Authentication:Microsoft:ClientId"];
var microsoftClientSecret = builder.Configuration["Authentication:Microsoft:ClientSecret"];

var authBuilder = builder.Services.AddAuthentication(options =>
    {
        options.DefaultScheme = IdentityConstants.ApplicationScheme;
        options.DefaultSignInScheme = IdentityConstants.ExternalScheme;
    });

authBuilder.AddIdentityCookies();

if (!string.IsNullOrWhiteSpace(googleClientId) && !string.IsNullOrWhiteSpace(googleClientSecret))
{
    authBuilder.AddGoogle(options =>
    {
        options.ClientId = googleClientId;
        options.ClientSecret = googleClientSecret;
    });
}

if (!string.IsNullOrWhiteSpace(microsoftClientId) && !string.IsNullOrWhiteSpace(microsoftClientSecret))
{
    authBuilder.AddMicrosoftAccount(options =>
    {
        options.ClientId = microsoftClientId;
        options.ClientSecret = microsoftClientSecret;
    });
}

var connectionString = builder.Configuration.GetConnectionString("DefaultConnection") ?? throw new InvalidOperationException("Connection string 'DefaultConnection' not found.");
var dataProvider = builder.Configuration["Data:Provider"] ?? "SqlServer";

builder.Services.AddDbContext<ApplicationDbContext>(options =>
{
    if (string.Equals(dataProvider, "SqlServer", StringComparison.OrdinalIgnoreCase))
    {
        options.UseSqlServer(connectionString);
        return;
    }

    options.UseSqlite(connectionString);
});

builder.Services.AddDbContext<RegistryDbContext>(options =>
{
    if (string.Equals(dataProvider, "SqlServer", StringComparison.OrdinalIgnoreCase))
    {
        options.UseSqlServer(connectionString);
        return;
    }

    options.UseSqlite(connectionString);
});

builder.Services.AddDatabaseDeveloperPageExceptionFilter();

builder.Services.AddIdentityCore<ApplicationUser>(options =>
    {
        options.SignIn.RequireConfirmedAccount = false;
    })
    .AddEntityFrameworkStores<ApplicationDbContext>()
    .AddSignInManager()
    .AddDefaultTokenProviders();

builder.Services.AddScoped<SmtpEmailSender>();
builder.Services.AddScoped<IEmailSender<ApplicationUser>>(serviceProvider => serviceProvider.GetRequiredService<SmtpEmailSender>());

var app = builder.Build();

using (var scope = app.Services.CreateScope())
{
    var applicationDbContext = scope.ServiceProvider.GetRequiredService<ApplicationDbContext>();
    await applicationDbContext.Database.MigrateAsync();

    var registryDbContext = scope.ServiceProvider.GetRequiredService<RegistryDbContext>();
    var registryMigrations = registryDbContext.Database.GetMigrations();

    if (registryMigrations.Any())
    {
        await registryDbContext.Database.MigrateAsync();
    }
    else
    {
        var databaseCreator = registryDbContext.Database.GetService<IRelationalDatabaseCreator>();
        if (!await databaseCreator.ExistsAsync())
        {
            await registryDbContext.Database.EnsureCreatedAsync();
        }
        else
        {
            var platformOwnersTableExists = await TableExistsAsync(registryDbContext, "PlatformOwners");
            if (!platformOwnersTableExists)
            {
                await databaseCreator.CreateTablesAsync();
            }
        }
    }
}

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseMigrationsEndPoint();
}
else
{
    app.UseExceptionHandler("/Error", createScopeForErrors: true);
    // 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.UseAntiforgery();

app.MapRazorComponents<App>()
    .AddInteractiveServerRenderMode();

// Add additional endpoints required by the Identity /Account Razor components.
app.MapAdditionalIdentityEndpoints();

app.Run();

static async Task<bool> TableExistsAsync(DbContext context, string tableName)
{
    ArgumentNullException.ThrowIfNull(context);
    ArgumentException.ThrowIfNullOrWhiteSpace(tableName);

    var connection = context.Database.GetDbConnection();
    var closeConnection = connection.State != ConnectionState.Open;

    if (closeConnection)
    {
        await connection.OpenAsync();
    }

    try
    {
        await using var command = connection.CreateCommand();

        if (context.Database.IsSqlServer())
        {
            command.CommandText = "SELECT 1 FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_NAME = @tableName";
        }
        else if (context.Database.IsSqlite())
        {
            command.CommandText = "SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = @tableName";
        }
        else
        {
            throw new NotSupportedException("Unsupported database provider for table existence check.");
        }

        var parameter = command.CreateParameter();
        parameter.ParameterName = "@tableName";
        parameter.Value = tableName;
        command.Parameters.Add(parameter);

        var result = await command.ExecuteScalarAsync();
        return result is not null && result != DBNull.Value;
    }
    finally
    {
        if (closeConnection)
        {
            await connection.CloseAsync();
        }
    }
}