using System.Collections.Specialized;
using System.Net;
using YandexMusic.API.Models.Common;
using YandexMusic.API.Requests.Common;

namespace YandexMusic.API.Requests.Track;

/// <summary>Особый запрос – не к api.music.yandex.net, а к произвольному URL.</summary>
internal class YStorageDownloadFileBuilder : YJsonRequestBuilder<YStorageDownloadFile?, string>
{
    public YStorageDownloadFileBuilder(YandexMusicApi api) : base(api) { }
    protected override string BaseUrl => ""; // не используется, т.к. URL берётся из параметра

    protected override string Method => WebRequestMethods.Http.Get;

    protected override string PathTemplate => "{src}";

    protected override Dictionary<string, string> GetSubstitutions(string src)
        => new() { { "src", src.Split('?')[0] } };
    protected override NameValueCollection GetQueryParams(string src)
    {
        var query = new NameValueCollection { { "format", "json" } };
        var parts = src.Split('?');
        if (parts.Length > 1)
        {
            foreach (var param in parts[1].Split('&'))
            {
                var kv = param.Split('=');
                if (kv.Length == 2) query.Add(kv[0], kv[1]);
            }
        }
        return query;
    }
}