/**
 * MediaInfoDLL - All info about media files, for DLL (JNA version)
 *
 * Copyright (C) 2009-2009 Jerome Martinez, Zen@MediaArea.net
 *
 * This library is free software: you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 **/

// Note: the original stuff was well packaged with Java style, 
// but I (the main developer) prefer to keep an easiest for me
// way to have all sources and example in the same place
// Removed stuff:
// "package net.sourceforge.mediainfo;"
// directory was /net/sourceforge/mediainfo

import static java.util.Collections.singletonMap;

import java.lang.reflect.Method;

import com.sun.jna.FunctionMapper;
import com.sun.jna.Library;
import com.sun.jna.Native;
import com.sun.jna.NativeLibrary;
import com.sun.jna.Pointer;
import com.sun.jna.WString;

class MediaInfo
{
    static
    {
        // libmediainfo for linux depends on libzen
        try
        {
            // We need to load dependencies first, because we know where our native libs are (e.g. Java Web Start Cache).
            // If we do not, the system will look for dependencies, but only in the library path.
            String os=System.getProperty("os.name");
            if (os!=null && !os.toLowerCase().startsWith("windows") && !os.toLowerCase().startsWith("mac"))
                NativeLibrary.getInstance("zen");
        }
        catch (LinkageError  e)
        {
            //Logger.getLogger(MediaInfo.class.getName()).warning("Failed to preload libzen");
        }
    }

    //Internal stuff
    interface MediaInfoDLL_Internal extends Library
    {

        MediaInfoDLL_Internal INSTANCE = (MediaInfoDLL_Internal) Native.loadLibrary("mediainfo", MediaInfoDLL_Internal.class, singletonMap(OPTION_FUNCTION_MAPPER, new FunctionMapper()
            {

                @Override
                public String getFunctionName(NativeLibrary lib, Method method)
                {
                    // MediaInfo_New(), MediaInfo_Open() ...
                    return "MediaInfo_" + method.getName();
                }
            }
        ));


        //Constructor/Destructor
        Pointer New();
        void Delete(Pointer Handle);

        //File
        int Open(Pointer Handle, WString file);
        void Close(Pointer Handle);

        //Infos
        WString Inform(Pointer Handle, int Reserved);
        WString Get(Pointer Handle, int StreamKind, int StreamNumber, WString parameter, int infoKind, int searchKind);
        WString GetI(Pointer Handle, int StreamKind, int StreamNumber, int parameterIndex, int infoKind);
        int     Count_Get(Pointer Handle, int StreamKind, int StreamNumber);

        //Options
        WString Option(Pointer Handle, WString option, WString value);
    }
    private Pointer Handle;

    public enum StreamKind {
        General,
        Video,
        Audio,
        Text,
        Chapters,
        Image,
        Menu;
    }

    //Enums
    public enum InfoKind {
        /**
         * Unique name of parameter.
         */
        Name,
    
        /**
         * Value of parameter.
         */
        Text,
    
        /**
         * Unique name of measure unit of parameter.
         */
        Measure,
    
        Options,
    
        /**
         * Translated name of parameter.
         */
        Name_Text,
    
        /**
         * Translated name of measure unit.
         */
        Measure_Text,
    
        /**
         * More information about the parameter.
         */
        Info,
    
        /**
         * How this parameter is supported, could be N (No), B (Beta), R (Read only), W
         * (Read/Write).
         */
        HowTo,
    
        /**
         * Domain of this piece of information.
         */
        Domain;
    }

    //Constructor/Destructor
    public MediaInfo()
    {
        Handle = MediaInfoDLL_Internal.INSTANCE.New();
    }

     public void dispose()
    {
        if (Handle == null)
            throw new IllegalStateException();
    
        MediaInfoDLL_Internal.INSTANCE.Delete(Handle);
        Handle = null;
    }

    @Override
    protected void finalize() throws Throwable
    {
        if (Handle != null)
            dispose();
    }

    //File
    /**
     * Open a file and collect information about it (technical information and tags).
     * 
     * @param file full name of the file to open
     * @return 1 if file was opened, 0 if file was not not opened
     */
    public int Open(String File_Name)
    {
        return MediaInfoDLL_Internal.INSTANCE.Open(Handle, new WString(File_Name));
    }

    /**
     * Close a file opened before with Open().
     * 
     */
    public void Close()
    {
        MediaInfoDLL_Internal.INSTANCE.Close(Handle);
    }

    //Information
    /**
     * Get all details about a file.
     * 
     * @return All details about a file in one string
     */
    public String Inform()
    {
        return MediaInfoDLL_Internal.INSTANCE.Inform(Handle, 0).toString();
    }

    /**
     * Get a piece of information about a file (parameter is a string).
     * 
     * @param StreamKind Kind of Stream (general, video, audio...)
     * @param StreamNumber Stream number in Kind of Stream (first, second...)
     * @param parameter Parameter you are looking for in the Stream (Codec, width, bitrate...),
     *            in string format ("Codec", "Width"...)
     * @return a string about information you search, an empty string if there is a problem
     */
    public String Get(StreamKind StreamKind, int StreamNumber, String parameter)
    {
        return Get(StreamKind, StreamNumber, parameter, InfoKind.Text, InfoKind.Name);
    }


    /**
     * Get a piece of information about a file (parameter is a string).
     * 
     * @param StreamKind Kind of Stream (general, video, audio...)
     * @param StreamNumber Stream number in Kind of Stream (first, second...)
     * @param parameter Parameter you are looking for in the Stream (Codec, width, bitrate...),
     *            in string format ("Codec", "Width"...)
     * @param infoKind Kind of information you want about the parameter (the text, the measure,
     *            the help...)
     * @param searchKind Where to look for the parameter
     */
    public String Get(StreamKind StreamKind, int StreamNumber, String parameter, InfoKind infoKind)
    {
        return Get(StreamKind, StreamNumber, parameter, infoKind, InfoKind.Name);
    }


    /**
     * Get a piece of information about a file (parameter is a string).
     * 
     * @param StreamKind Kind of Stream (general, video, audio...)
     * @param StreamNumber Stream number in Kind of Stream (first, second...)
     * @param parameter Parameter you are looking for in the Stream (Codec, width, bitrate...),
     *            in string format ("Codec", "Width"...)
     * @param infoKind Kind of information you want about the parameter (the text, the measure,
     *            the help...)
     * @param searchKind Where to look for the parameter
     * @return a string about information you search, an empty string if there is a problem
     */
    public String Get(StreamKind StreamKind, int StreamNumber, String parameter, InfoKind infoKind, InfoKind searchKind)
    {
        return MediaInfoDLL_Internal.INSTANCE.Get(Handle, StreamKind.ordinal(), StreamNumber, new WString(parameter), infoKind.ordinal(), searchKind.ordinal()).toString();
    }


    /**
     * Get a piece of information about a file (parameter is an integer).
     * 

     * @param StreamKind Kind of Stream (general, video, audio...)
     * @param StreamNumber Stream number in Kind of Stream (first, second...)
     * @param parameter Parameter you are looking for in the Stream (Codec, width, bitrate...),
     *            in integer format (first parameter, second parameter...)
     * @return a string about information you search, an empty string if there is a problem
     */
    public String get(StreamKind StreamKind, int StreamNumber, int parameterIndex)
    {
        return Get(StreamKind, StreamNumber, parameterIndex, InfoKind.Text);
    }


    /**
     * Get a piece of information about a file (parameter is an integer).
     * 

     * @param StreamKind Kind of Stream (general, video, audio...)
     * @param StreamNumber Stream number in Kind of Stream (first, second...)
     * @param parameter Parameter you are looking for in the Stream (Codec, width, bitrate...),
     *            in integer format (first parameter, second parameter...)
     * @param infoKind Kind of information you want about the parameter (the text, the measure,
     *            the help...)
     * @return a string about information you search, an empty string if there is a problem
     */
    public String Get(StreamKind StreamKind, int StreamNumber, int parameterIndex, InfoKind infoKind)
    {
        return MediaInfoDLL_Internal.INSTANCE.GetI(Handle, StreamKind.ordinal(), StreamNumber, parameterIndex, infoKind.ordinal()).toString();
    }

    /**
     * Count of Streams of a Stream kind (StreamNumber not filled), or count of piece of
     * information in this Stream.
     * 

     * @param StreamKind Kind of Stream (general, video, audio...)
     * @return number of Streams of the given Stream kind
     */
    public int Count_Get(StreamKind StreamKind)
    {
        return MediaInfoDLL_Internal.INSTANCE.Count_Get(Handle, StreamKind.ordinal(), -1);
    }


    /**
     * Count of Streams of a Stream kind (StreamNumber not filled), or count of piece of
     * information in this Stream.
     * 
     * @param StreamKind Kind of Stream (general, video, audio...)
     * @param StreamNumber Stream number in this kind of Stream (first, second...)
     * @return number of Streams of the given Stream kind
     */
    public int Count_Get(StreamKind StreamKind, int StreamNumber)
    {
        return MediaInfoDLL_Internal.INSTANCE.Count_Get(Handle, StreamKind.ordinal(), StreamNumber);
    }



    //Options
    /**
     * Configure or get information about MediaInfo.
     * 
     * @param Option The name of option
     * @return Depends on the option: by default "" (nothing) means No, other means Yes
     */
    public String Option(String Option)
    {
        return MediaInfoDLL_Internal.INSTANCE.Option(Handle, new WString(Option), new WString("")).toString();
    }

    /**
     * Configure or get information about MediaInfo.
     * 
     * @param Option The name of option
     * @param Value The value of option
     * @return Depends on the option: by default "" (nothing) means No, other means Yes
     */
    public String Option(String Option, String Value)
    {
        return MediaInfoDLL_Internal.INSTANCE.Option(Handle, new WString(Option), new WString(Value)).toString();
    }

    /**
     * Configure or get information about MediaInfo (Static version).
     * 
     * @param Option The name of option
     * @return Depends on the option: by default "" (nothing) means No, other means Yes
     */
    public static String Option_Static(String Option)
    {
        return MediaInfoDLL_Internal.INSTANCE.Option(MediaInfoDLL_Internal.INSTANCE.New(), new WString(Option), new WString("")).toString();
    }

    /**
     * Configure or get information about MediaInfo(Static version).
     * 
     * @param Option The name of option
     * @param Value The value of option
     * @return Depends on the option: by default "" (nothing) means No, other means Yes
     */
    public static String Option_Static(String Option, String Value)
    {
        return MediaInfoDLL_Internal.INSTANCE.Option(MediaInfoDLL_Internal.INSTANCE.New(), new WString(Option), new WString(Value)).toString();
    }
}
