[CCode (cheader_filename = "mpv/client.h")]
namespace Mpv {

    [CCode (cname = "mpv_error", cprefix = "MPV_ERROR_", has_type_id = false)]
    public enum Error {
        SUCCESS,
        EVENT_QUEUE_FULL,
        NOMEM,
        UNINITIALIZED,
        INVALID_PARAMETER,
        OPTION_NOT_FOUND,
        OPTION_FORMAT,
        OPTION_ERROR,
        PROPERTY_NOT_FOUND,
        PROPERTY_FORMAT,
        PROPERTY_UNAVAILABLE,
        PROPERTY_ERROR,
        COMMAND,
        LOADING_FAILED,
        AO_INIT_FAILED,
        VO_INIT_FAILED,
        NOTHING_TO_PLAY,
        UNKNOWN_FORMAT,
        UNSUPPORTED,
        NOT_IMPLEMENTED,
        GENERIC;

        [CCode (cname = "mpv_error_string")]
        public unowned string to_string ();
    }

    public delegate void WakeupCallback ();

    [CCode (cname = "mpv_handle", free_function = "mpv_destroy")]
    [Compact]
    public class Handle {
        [CCode (cname = "mpv_create")]
        public Handle ();

        [CCode (cname = "mpv_initialize")]
        public Error initialize ();

        [CCode (cname = "mpv_wait_event")]
        public unowned Event? wait_event (double timeout);

        public WakeupCallback wakeup_callback {
            [CCode (cname = "mpv_set_wakeup_callback")] set;
        }

        [CCode (cname = "mpv_set_property")]
        private Error set_property (string name, Format format, void *data);

        [CCode (cname = "mpv_set_property_string")]
        public Error set_property_string (string name, string value);

        public Error set_property_int64 (string name, int64 value) {
            return this.set_property (name, Format.INT64, &value);
        }

        public Error set_property_flag (string name, bool value) {
            int flag = value ? 1 : 0;
            return this.set_property (name, Format.FLAG, &flag);
        }

        [CCode (cname = "mpv_command")]
        public Error command ([CCode (array_length = false)] string[] args);

        [CCode (cname = "mpv_observe_property")]
        public Error observe_property (uint64 reply_userdata, string name, Format format);
    }

    [CCode (cname = "mpv_format", cprefix = "MPV_FORMAT_", has_type_id = false)]
    public enum Format {
        NONE,
        STRING,
        OSD_STRING,
        FLAG,
        INT64,
        DOUBLE,
        NODE,
        NODE_ARRAY,
        NODE_MAP,
        BYTE_ARRAY,
    }

    [CCode (cname = "mpv_event_id", cprefix = "MPV_EVENT_", has_type_id = false)]
    public enum EventId {
        NONE,
        SHUTDOWN,
        LOG_MESSAGE,
        GET_PROPERTY_REPLY,
        SET_PROPERTY_REPLY,
        COMMAND_REPLY,
        START_FILE,
        END_FILE,
        FILE_LOADED,
        CLIENT_MESSAGE,
        VIDEO_RECONFIG,
        AUDIO_RECONFIG,
        SEEK,
        PLAYBACK_RESTART,
        PROPERTY_CHANGE,
        QUEUE_OVERFLOW,
        HOOK,
    }

    [CCode (cname = "mpv_event", destroy_function = "", has_type_id = false, has_copy_function = false)]
    public struct Event {
        EventId event_id;
        Error error;
        uint64 reply_userdata;
        void *data;

        public unowned EventProperty? parse_property ()
                requires (event_id == EventId.PROPERTY_CHANGE)
                requires (error >= 0)
        {
            return (EventProperty?) data;
        }

        public unowned EventEndFile? parse_end_file ()
                requires (event_id == EventId.END_FILE)
                requires (error >= 0)
        {
            return (EventEndFile?) data;
        }
    }

    [CCode (cname = "mpv_event_property", destroy_function = "", has_type_id = false, has_copy_function = false)]
    public struct EventProperty {
        unowned string name;
        Format format;
        void *data;

        public int64 parse_int64 ()
                requires (format == Format.INT64)
        {
            return * (int64 *) data;
        }

        public double parse_double ()
                requires (format == Format.DOUBLE)
        {
            return * (double *) data;
        }

        public bool parse_flag ()
                requires (format == Format.FLAG)
        {
            return (* (int *) data) == 1;
        }
    }

    [CCode (cname = "mpv_event_end_file", destroy_function = "", has_type_id = false, has_copy_function = false)]
    public struct EventEndFile {
        EndFileReason reason;
        Error error;
        int64 playlist_entry_id;
        int playlist_insert_num_entries;
    }

    [CCode (cname = "mpv_end_file_reason", cprefix = "MPV_END_FILE_REASON_", has_type_id = false)]
    public enum EndFileReason {
        EOF,
        STOP,
        QUIT,
        ERROR,
        REDIRECT,
    }

}