using System.Collections.Frozen;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Moonlight.Api.Database;
using Moonlight.Api.Database.Entities;
using Moonlight.Api.Services;
using Moonlight.Shared;

namespace Moonlight.Api.Http.Controllers.Admin.Users;

[ApiController]
[Route("api/admin/users")]
[Authorize(Policy = Permissions.Users.Delete)]
public class UserDeletionController : Controller
{
    private readonly UserDeletionService UserDeletionService;
    private readonly DatabaseRepository<User> Repository;

    public UserDeletionController(UserDeletionService userDeletionService, DatabaseRepository<User> repository)
    {
        UserDeletionService = userDeletionService;
        Repository = repository;
    }

    [HttpDelete("{id:int}")]
    public async Task<ActionResult> DeleteAsync([FromRoute] int id)
    {
        var userExists = await Repository
            .Query()
            .AnyAsync(user => user.Id == id);

        if (!userExists)
            return Problem("No user with this id found", statusCode: 404);

        var validationResult = await UserDeletionService.ValidateAsync(id);

        if (!validationResult.IsValid)
        {
            return ValidationProblem(
                new ValidationProblemDetails(
                    new Dictionary<string, string[]>()
                    {
                        {
                            string.Empty,
                            validationResult.ErrorMessages.ToArray()
                        }
                    }
                )
            );
        }
        
        await UserDeletionService.DeleteAsync(id);
        return NoContent();
    }
}