using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using Newtonsoft.Json;

namespace NScript.Gitea
{
    public class ReleaseUtility
    {
        public static List<Release> GetReleases(string owner, string repo,
            string apiUrl = "https://git.exmods.org/api/v1")
        {
            string fullUrl = $"{apiUrl}/repos/{owner}/{repo}/releases";
            WebRequest req = WebRequest.Create(fullUrl);
            req.Method = "GET";
            HttpWebResponse resp = (HttpWebResponse) req.GetResponse();
            StreamReader body = new StreamReader(resp.GetResponseStream());
            string respBody = body.ReadToEnd();
            resp.Close();
            return JsonConvert.DeserializeObject<List<Release>>(respBody);
        }
        
        public static byte[] DownloadAsset(Asset asset)
        {
            return DownloadAsset(asset.BrowserDownloadUrl);
        }

        public static byte[] DownloadAsset(string url)
        {
            WebRequest req = WebRequest.Create(url);
            req.Method = "GET";
            HttpWebResponse resp = (HttpWebResponse) req.GetResponse();
            BinaryReader body = new BinaryReader(resp.GetResponseStream());
            byte[] respBody = body.ReadBytes(int.MaxValue);
            resp.Close();
            return respBody;
        }

        public static Release? FindRelease(List<Release> releases, bool prerelease = false, bool draft = false)
        {
            foreach (Release release in releases)
            {
                if (release.PreRelease == prerelease && release.Draft == draft) return release;
            }

            return null;
        }

        public static Asset? FindAsset(Release release, string name)
        {
            return FindAsset(release.Assets, name);
        }
        
        public static Asset? FindAsset(List<Asset> assets, string name)
        {
            foreach (var asset in assets)
            {
                if (string.Equals(asset.Name, name, StringComparison.InvariantCulture)) return asset;
            }

            return null;
        }
    }
}