using System.Net.Http.Json;
using Prefab.Web.Client.Models.Shared;
using Prefab.Web.Client.Pages;

namespace Prefab.Web.Client.Services;

public interface ICategoriesPageService
{
    Task<Result<CategoriesPageModel>> GetPage(CancellationToken cancellationToken);
}

public sealed class CategoriesPageService(HttpClient httpClient) : ICategoriesPageService
{
    public async Task<Result<CategoriesPageModel>> GetPage(CancellationToken cancellationToken)
    {
        using var response = await httpClient.GetAsync("bff/categories/page", cancellationToken);

        var result = await response.Content.ReadFromJsonAsync<Result<CategoriesPageModel>>(cancellationToken);

        if (result is not null)
        {
            return result;
        }

        var exception = new InvalidOperationException($"Response {(int)response.StatusCode} did not contain a valid payload.");
        var unexpectedProblem = ResultProblem.Unexpected("Failed to retrieve categories.", exception, response.StatusCode);

        return Result<CategoriesPageModel>.Failure(unexpectedProblem);
    }
}