using System.IO.Compression;
using System.Runtime.InteropServices;

namespace EC.Util.CameraSDK;

public class CameraFactory
{
    static CameraFactory()
    {
        string zipPath = Path.Combine("libs", "cameraSdks.zip");
        if (!File.Exists(zipPath)) throw new FileNotFoundException(zipPath);
        using ZipArchive archive = ZipFile.OpenRead(zipPath);
        bool isWin = RuntimeInformation.IsOSPlatform(OSPlatform.Windows), is64 = Environment.Is64BitProcess;
        string sysEnv = string.Format("{0}{1}", isWin ? "win" : "linux", is64 ? "64" : "32");
        string hkOrDir = $"cameraSdks/hik/{sysEnv}/";
        string dhOrDir = $"cameraSdks/dahua/{sysEnv}/";
        string ysOrDir = $"cameraSdks/yushi/{sysEnv}/";
        // TODO: linux chmod 777, LD_LIBRARY_PATH
        foreach (ZipArchiveEntry entry in archive.Entries)
        {
            if (entry.Length == 0) continue;
            string fullName = entry.FullName, fileExtPath = string.Empty;
            if (fullName.StartsWith(hkOrDir))
                fileExtPath = Path.Join("libs", "hik", fullName[(hkOrDir.Length - 1)..]);
            else if (fullName.StartsWith(dhOrDir))
                fileExtPath = Path.Join("libs", "dahua", fullName[(dhOrDir.Length - 1)..]);
            else if (fullName.StartsWith(ysOrDir))
                fileExtPath = Path.Join("libs", "yushi", fullName[(ysOrDir.Length - 1)..]);
            if (string.IsNullOrEmpty(fileExtPath)) continue;
            FileInfo fi = new(fileExtPath);
            if (fi.Directory != null && !fi.Directory.Exists) fi.Directory.Create();
            if (!fi.Exists) entry.ExtractToFile(fileExtPath);
        }
        if (RuntimeInformation.IsOSPlatform(OSPlatform.Linux))
        {
            string[] hikLibsName = new string[] { "libAudioRender.so", "libSuperRender.so" };
            foreach (string name in hikLibsName)
            {
                if (File.Exists(Path.Join(".", name))) continue;
                string path = Path.Join("libs", "hik", name);
                FileInfo fi = new(path);
                if (!fi.Exists) throw new FileNotFoundException(path);
                fi.CopyTo(Path.Join(".", name), false);
            }
        }
    }

    public static void VirtualInit()
    { }

    public static ICameraSdk BuildCameraSdk(CameraInfo info)
    {
        ICameraSdk sdk = (info.Manufactor) switch
        {
            CameraManufactor.HiK => new HiKSdk(info),
            CameraManufactor.DaHua => new DaHuaSdk(info),
            CameraManufactor.YuShi => new YuShiSdk(info),
            _ => throw new NotSupportedException(),
        };
        return sdk;
    }
}