using Microsoft.OpenApi.Models;
using Newtonsoft.Json.Serialization;
using Swashbuckle.AspNetCore.SwaggerGen;

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddControllers()
    .AddNewtonsoftJson(options =>
    {
        options.SerializerSettings.ContractResolver = new DefaultContractResolver
        {
            NamingStrategy = new SnakeCaseNamingStrategy()
        };
    });

builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen(c =>
                               {
                                   c.SchemaFilter<SnakeCaseSchemaFilter>();
                               });

var app = builder.Build();

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

app.UseHttpsRedirection();
app.MapControllers();
app.Run();

public class SnakeCaseSchemaFilter : ISchemaFilter
{
    private readonly SnakeCaseNamingStrategy _namingStrategy = new();

    public void Apply(OpenApiSchema schema, SchemaFilterContext context)
    {
        if (schema.Properties == null) return;

        var newProps = new Dictionary<string, OpenApiSchema>();
        foreach (var prop in schema.Properties)
        {
            var snakeName = _namingStrategy.GetPropertyName(prop.Key, false);
            newProps[snakeName] = prop.Value;
        }

        schema.Properties = newProps;
    }
}