using System;
using System.Collections.Generic;
using System.IO;

namespace NScript.Filmscript
{
    public class FilmscriptInstaller : Install.IInstallable
    {
        public string Name { get; } = "filmscript.dll";
        
        public void Install()
        {
            List<Gitea.Release> releases = Gitea.ReleaseUtility.GetReleases("NGnius", "filmscript-rs");

            GamecraftModdingAPI.Utility.Logging.Log($"Downloading {Name}");
#if DEBUG
            var r = Gitea.ReleaseUtility.FindRelease(releases, prerelease: true)?? throw new Exception("Failed to find valid release candidate");
#else
            var r = Gitea.ReleaseUtility.FindRelease(releases)?? throw new Exception("Failed to find valid release candidate");
#endif
            var a = Gitea.ReleaseUtility.FindAsset(r, Name)?? throw new Exception($"Failed to find valid asset candidate for {Name}");
            var download = Gitea.ReleaseUtility.DownloadAsset(a);
            File.WriteAllBytes(NScript.Install.InstallTools.NativeDllFilepath(Name), download);
        }

        public bool IsInstalled()
        {
            // NOTE: Mono will only try to load a native DLL once, so trying to call a non-existent DLL
            // will prevent it from being loaded later, even if it's downloaded between now and then.
            return NScript.Install.InstallTools.NativeDllExists(Name);
        }
    }
}