using System;
using System.Runtime.InteropServices;
using Tizen.Multimedia;

internal static partial class Interop
{
    internal static partial class MetadataExtractor
    {
        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_create")]
        internal static extern MetadataExtractorError Create(out IntPtr handle);

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_set_path")]
        internal static extern MetadataExtractorError SetPath(IntPtr handle, string path);

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_set_buffer")]
        internal static extern MetadataExtractorError SetBuffer(IntPtr handle, IntPtr buffer, int size);

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_destroy")]
        internal static extern MetadataExtractorError Destroy(IntPtr handle);

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_metadata")]
        private static extern MetadataExtractorError GetMetadata(IntPtr handle, MetadataExtractorAttr attribute, out IntPtr value);

        internal static string GetMetadata(IntPtr handle, MetadataExtractorAttr attr)
        {
            IntPtr valuePtr = IntPtr.Zero;

            try
            {
                var ret = GetMetadata(handle, attr, out valuePtr);
                MetadataExtractorRetValidator.ThrowIfError(ret, "Failed to get value for " + attr);
                return Marshal.PtrToStringAnsi(valuePtr);
            }
            finally
            {
                Libc.Free(valuePtr);
            }
        }

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_artwork")]
        internal static extern MetadataExtractorError GetArtwork(IntPtr handle, out IntPtr artwork,
            out int size, out IntPtr mimeType);

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_frame")]
        internal static extern MetadataExtractorError GetFrame(IntPtr handle, out IntPtr frame, out int size);

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_synclyrics")]
        internal static extern MetadataExtractorError GetSynclyrics(IntPtr handle, int index,
            out uint timeStamp, out IntPtr lyrics);

        [DllImport(Libraries.MetadataExtractor, EntryPoint = "metadata_extractor_get_frame_at_time")]
        internal static extern MetadataExtractorError GetFrameAtTime(IntPtr handle, uint timeStamp,
            bool isAccurate, out IntPtr frame, out int size);
    }
}