using Microsoft.EntityFrameworkCore;

var builder = WebApplication.CreateBuilder(args);

// Datenbank-Pfad: /app/data im Container (Volume) - überlebt Container-Neustarts!
var dbPath = Path.Combine("/app/data", "fitness.db");
builder.Services.AddDbContext<AppDbContext>(options =>
    options.UseSqlite($"Data Source={dbPath}"));

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddOpenApiDocument();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Datenbank automatisch erstellen, falls sie nicht existiert
using (var scope = app.Services.CreateScope())
{
    var db = scope.ServiceProvider.GetRequiredService<AppDbContext>();
    db.Database.EnsureCreated();
}

if (app.Environment.IsDevelopment())
{
    app.UseOpenApi();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();

// ===================================================================
// CRUD ENDPUNKTE (minimal, ohne Auth)
// ===================================================================

// CREATE
app.MapPost("/api/workouts", async (Workout workout, AppDbContext db) =>
{
    workout.Id = Guid.NewGuid();
    db.Workouts.Add(workout);
    await db.SaveChangesAsync();
    return Results.Created($"/api/workouts/{workout.Id}", workout);
});

// READ ALL
app.MapGet("/api/workouts", async (AppDbContext db) =>
    await db.Workouts.OrderByDescending(w => w.Date).ToListAsync());

// READ BY ID
app.MapGet("/api/workouts/{id:guid}", async (Guid id, AppDbContext db) =>
    await db.Workouts.FindAsync(id) is Workout w ? Results.Ok(w) : Results.NotFound());

// UPDATE
app.MapPut("/api/workouts/{id:guid}", async (Guid id, Workout input, AppDbContext db) =>
{
    var workout = await db.Workouts.FindAsync(id);
    if (workout is null) return Results.NotFound();

    workout.Name = input.Name;
    workout.Date = input.Date;
    workout.DurationMinutes = input.DurationMinutes;
    workout.Notes = input.Notes;
    await db.SaveChangesAsync();
    return Results.Ok(workout);
});

// DELETE
app.MapDelete("/api/workouts/{id:guid}", async (Guid id, AppDbContext db) =>
{
    var workout = await db.Workouts.FindAsync(id);
    if (workout is null) return Results.NotFound();

    db.Workouts.Remove(workout);
    await db.SaveChangesAsync();
    return Results.NoContent();
});

app.MapGet("/", () => "🏋️ Fitness API läuft!");
app.Run();

public class AppDbContext : DbContext
{
    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options) { }
    public DbSet<Workout> Workouts => Set<Workout>();
}