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

namespace Application.Features.Api.Developers.Apps.RotateSecret;

internal sealed class Handler(IAppDbContext db) : ICommandHandler<Command, Result<Response>>
{
    public async Task<Result<Response>> Handle(Command request, CancellationToken ct)
    {
        var app = await db.ApiApplication
            .Where(c => c.ID == request.AppID && c.OwnerMemberID == request.OwnerMemberID)
            .FirstOrDefaultAsync(ct);

        if (app is null)
        {
            return Result.Failure<Response>(Error.NotFound("App.NotFound", "App not found."));
        }

        var oldCreds = await db.ApiCredential
            .AsTracking()
            .Where(c => c.ApplicationID == app.ID && c.RevokedAt == null)
            .ToListAsync(ct);

        foreach (var c in oldCreds)
        {
            c.Revoke();
        }

        var newClientID = ApiTokenGenerator.GenerateClientID();
        var newSecret = ApiTokenGenerator.GenerateClientSecret();
        var credential = ApiCredential.Create(app.ID, newClientID, ApiTokenGenerator.Hash(newSecret), ApiTokenGenerator.Hint(newSecret));

        await db.ApiCredential.AddAsync(credential, ct);
        await db.SaveChangesAsync(ct);

        return Result.Success(new Response(newClientID, newSecret));
    }
}