using Application.Abstractions.Data;
using Application.Abstractions.Messaging;
using Domain.Entities.Developers;
using Microsoft.EntityFrameworkCore;
using SharedKernel.Results;

namespace Application.Features.Admin.Developers.OverrideRateLimit;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result>
{
    public async Task<Result> Handle(Command request, CancellationToken ct)
    {
        if (request.LimitPerMinute <= 0 || request.LimitPerMinute > 100000)
        {
            return Result.Failure(Error.Problem("RateLimit.Invalid", "LimitPerMinute must be 1-100000."));
        }

        var appExists = await db.ApiApplication.AnyAsync(c => c.ID == request.AppID, ct);
        if (!appExists)
        {
            return Result.Failure(Error.NotFound("App.NotFound", "App not found."));
        }

        var existing = await db.ApiRateLimit
            .AsTracking()
            .FirstOrDefaultAsync(c => c.ApplicationID == request.AppID, ct);

        if (existing is null)
        {
            await db.ApiRateLimit.AddAsync(ApiRateLimit.Create(request.AppID, request.LimitPerMinute), ct);
        }
        else
        {
            existing.SetLimit(request.LimitPerMinute);
        }

        await db.SaveChangesAsync(ct);
        return Result.Success();
    }
}