Program.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using System.Text.Json;
using System.Text.Json.Serialization;
using System.Collections.Generic;

// ===== Classes first =====
public class Player
{
    public int Gold { get; set; }
    public int Elixir { get; set; }
}

public class Troop
{
    public string Type { get; set; }
    public int X { get; set; }
    public int Y { get; set; }
}

// ===== Top-level code =====
var builder = WebApplication.CreateBuilder(args);
var app = builder.Build();

// ===== Game State =====
var mapSize = 15;

// Jagged array for serializable map
string[][] map = new string[mapSize][];
for (int i = 0; i < mapSize; i++)
    map[i] = new string[mapSize];

// Player info
var player = new Player { Gold = 0, Elixir = 0 };

// Troops list
var troops = new List<Troop>();

// ===== Endpoints =====
app.UseDefaultFiles();
app.UseStaticFiles();

// Get player info
app.MapGet("/player", () => player);

// Get map info
app.MapGet("/map", () => map);

// Get troops
app.MapGet("/troops", () => troops);

// Collect gold
app.MapPost("/collect-gold", () =>
{
    player.Gold += 10;
    return Results.Ok();
});

// Place building
app.MapPost("/place-building/{x}/{y}/{name}", (int x, int y, string name) =>
{
    if (x < 0 || x >= mapSize || y < 0 || y >= mapSize)
        return Results.BadRequest("Invalid coordinates");
    map[y][x] = name;
    return Results.Ok();
});

// Train troop
app.MapPost("/train-troop/{type}/{x}/{y}", (string type, int x, int y) =>
{
    if (x < 0 || x >= mapSize || y < 0 || y >= mapSize)
        return Results.BadRequest("Invalid coordinates");
    troops.Add(new Troop { Type = type, X = x, Y = y });
    return Results.Ok();
});

// Advance troops (example simple movement)
app.MapPost("/tick", () =>
{
    foreach (var t in troops)
    {
        if (t.X < mapSize - 1) t.X += 1;
    }
    return Results.Ok();
});

app.Run();