using System.Linq;
using System.Text.Json;
using System.Threading.Tasks;
using Gott.Services;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;

namespace Gott.Endpoints;

public static class SessionEndpoint
{
    public static void MapSessionEndpoints(this IEndpointRouteBuilder app)
    {
        app.MapGet("/api/sessions", HandleList);
        app.MapPost("/api/sessions", HandleCreate);
        app.MapPut("/api/sessions/{sessionId}", HandleUpdate);
    }

    private static async Task HandleList(HttpContext ctx, DatabaseService db)
    {
        var sessions = await db.GetSessions();
        await ctx.Response.WriteAsJsonAsync(sessions);
    }

    private static async Task HandleCreate(HttpContext ctx, DatabaseService db)
    {
        var session = await db.CreateSession("Neue Session");
        await ctx.Response.WriteAsJsonAsync(session);
    }

    private static async Task HandleUpdate(HttpContext ctx, DatabaseService db)
    {
        var sessionId = ctx.Request.RouteValues["sessionId"]?.ToString();
        if (string.IsNullOrEmpty(sessionId))
        {
            ctx.Response.StatusCode = 400;
            return;
        }

        var body = await JsonSerializer.DeserializeAsync<JsonElement>(ctx.Request.Body);
        if (body.TryGetProperty("name", out var nameEl))
        {
            await db.UpdateSessionName(sessionId, nameEl.GetString());
        }

        var session = await db.GetSession(sessionId);
        await ctx.Response.WriteAsJsonAsync(session);
    }
}