using System.Security.Claims;
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Authentication.Cookies;
using Microsoft.EntityFrameworkCore;
using MudBlazor.Services;
using timetracker.Components;
using timetracker.Data;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddAuthentication(CookieAuthenticationDefaults.AuthenticationScheme)
    .AddCookie(options =>
    {
        options.LoginPath = "/login";
        options.LogoutPath = "/auth/logout";
        options.ExpireTimeSpan = TimeSpan.FromDays(30);
        options.SlidingExpiration = true;
    });
builder.Services.AddAuthorization(options =>
{
    options.AddPolicy("AdminOnly", policy =>
        policy.RequireClaim(System.Security.Claims.ClaimTypes.Name, "marc"));
});
builder.Services.AddCascadingAuthenticationState();
builder.Services.AddHttpContextAccessor();
builder.Services.AddScoped<AuthService>();

// Add services to the container.
builder.Services.AddRazorComponents()
    .AddInteractiveServerComponents();
builder.Services.AddMudServices();
builder.Services.AddHttpClient<HolidayService>();

var dbPath = Environment.GetEnvironmentVariable("TIMETRACKER_DB_PATH")
    ?? Path.Combine(builder.Environment.ContentRootPath, "timetracker.db");
builder.Services.AddDbContextFactory<TimetrackerDbContext>(options =>
    options.UseSqlite($"Data Source={dbPath}"));
builder.Services.AddScoped<TimetrackerService>();

var app = builder.Build();

using (var scope = app.Services.CreateScope())
{
    var factory = scope.ServiceProvider.GetRequiredService<IDbContextFactory<TimetrackerDbContext>>();
    await using var db = await factory.CreateDbContextAsync();
    await db.Database.MigrateAsync();
}

// Configure the HTTP request pipeline.
if (!app.Environment.IsDevelopment())
{
    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.UseStatusCodePagesWithReExecute("/not-found", createScopeForStatusCodePages: true);
if (app.Configuration.GetValue("EnableHttpsRedirect", !app.Environment.IsDevelopment()))
{
    app.UseHttpsRedirection();
}

app.UseAuthentication();
app.UseAuthorization();

app.UseAntiforgery();

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

// ── Auth-Endpoints ────────────────────────────────────────────────────────────
app.MapPost("/auth/login", async (HttpContext ctx, AuthService authService) =>
{
    var form = await ctx.Request.ReadFormAsync();
    var username = form["username"].ToString();
    var password = form["password"].ToString();
    var user = await authService.LoginAsync(username, password);
    if (user == null)
        return Results.Redirect("/login?error=invalid");

    var claims = new[] {
        new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
        new Claim(ClaimTypes.Name, user.Username)
    };
    var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
    await ctx.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme,
        new ClaimsPrincipal(identity),
        new AuthenticationProperties { IsPersistent = true });
    return Results.Redirect("/");
}).DisableAntiforgery();

app.MapPost("/auth/register", async (HttpContext ctx, AuthService authService) =>
{
    var form = await ctx.Request.ReadFormAsync();
    var username = form["username"].ToString();
    var password = form["password"].ToString();
    var (user, error) = await authService.RegisterAsync(username, password);
    if (user == null)
        return Results.Redirect($"/login?tab=register&error={Uri.EscapeDataString(error!)}");

    var claims = new[] {
        new Claim(ClaimTypes.NameIdentifier, user.Id.ToString()),
        new Claim(ClaimTypes.Name, user.Username)
    };
    var identity = new ClaimsIdentity(claims, CookieAuthenticationDefaults.AuthenticationScheme);
    await ctx.SignInAsync(CookieAuthenticationDefaults.AuthenticationScheme,
        new ClaimsPrincipal(identity),
        new AuthenticationProperties { IsPersistent = true });
    return Results.Redirect("/");
}).DisableAntiforgery();

app.MapGet("/auth/logout", async (HttpContext ctx) =>
{
    await ctx.SignOutAsync(CookieAuthenticationDefaults.AuthenticationScheme);
    return Results.Redirect("/login");
});

app.Run();