src/Web/WebMVC/Services/CatalogService.cs

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namespace Microsoft.eShopOnContainers.WebMVC.Services;

public class CatalogService : ICatalogService
{
    private readonly IOptions<AppSettings> _settings;
    private readonly HttpClient _httpClient;
    private readonly ILogger<CatalogService> _logger;

    private readonly string _remoteServiceBaseUrl;

    public CatalogService(HttpClient httpClient, ILogger<CatalogService> logger, IOptions<AppSettings> settings)
    {
        _httpClient = httpClient;
        _settings = settings;
        _logger = logger;

        _remoteServiceBaseUrl = $"{_settings.Value.PurchaseUrl}/c/api/v1/catalog/";
    }

    public async Task<Catalog> GetCatalogItems(int page, int take, int? brand, int? type)
    {
        var uri = API.Catalog.GetAllCatalogItems(_remoteServiceBaseUrl, page, take, brand, type);

        var responseString = await _httpClient.GetStringAsync(uri);

        var catalog = JsonSerializer.Deserialize<Catalog>(responseString, new JsonSerializerOptions
        {
            PropertyNameCaseInsensitive = true
        });

        return catalog;
    }

    public async Task<IEnumerable<SelectListItem>> GetBrands()
    {
        var uri = API.Catalog.GetAllBrands(_remoteServiceBaseUrl);

        var responseString = await _httpClient.GetStringAsync(uri);

        var items = new List<SelectListItem>();

        items.Add(new SelectListItem() { Value = null, Text = "All", Selected = true });
            
        using var brands = JsonDocument.Parse(responseString);

        foreach (JsonElement brand  in brands.RootElement.EnumerateArray())
        {
            items.Add(new SelectListItem()
            {
                Value = brand.GetProperty("id").ToString(),
                Text = brand.GetProperty("brand").ToString()
            });
        }

        return items;
    }

    public async Task<IEnumerable<SelectListItem>> GetTypes()
    {
        var uri = API.Catalog.GetAllTypes(_remoteServiceBaseUrl);