package cn.angs;

import java.io.*;

import static cn.angs.FileUtil.loadRecourseFromJarByFolder;

/**
 * ClassName: DefaultFFMPEGLocator.java
 * Description: 默认的ffmpeg可执行定位器，运行时在程序临时文件目录生成ffmpeg执行文件，
 *  适配windows、linux、mac系统
 *
 * @author wangshun@cloudwalk.cn
 * @version 1.0.0
 * @date 2021/07/22 13:47
 */
public class DefaultFFMPEGLocator extends AbstractFFMPEGLocator {

    /**
     * 追踪版本
     */
    private static final int myEXEversion = 1;

    /**
     * ffmpeg路径.
     */
    private String path;


    private static final String WIN = "windows";
    private static final String MAC = "mac";

    /**
     * 构建默认的FFMPEGLocator实例，并且导出ffmpeg执行文件到临时目录
     */
    public DefaultFFMPEGLocator() {
        String os = System.getProperty("os.name").toLowerCase();
        // Windows?
        boolean isWindows = os.contains(WIN);
        //MacOS
        boolean isMacOS = os.contains(MAC);
        File temp = new File(System.getProperty("java.io.tmpdir"), "jave-"
                + myEXEversion);
        if (!temp.exists()) {
            temp.mkdirs();
            temp.deleteOnExit();
        }
        String relativePath;
        if (isMacOS) {
            relativePath = "macos10";
        } else if (isWindows) {
            relativePath = "window";
        } else {
            relativePath = "linux";
        }
        String _temp = temp.getPath() + File.separator;

        String ffmpeg = isWindows ? "ffmpeg.exe" : "ffmpeg";
        String absolutePath;
        if (isWindows) {
            absolutePath = temp + File.separator + "system" + File.separator + relativePath + File.separator + "bin" + File.separator + ffmpeg;
        } else {
            absolutePath = temp + File.separator + "system" + File.separator + relativePath + File.separator + ffmpeg;
        }
        File ffmpegFile = new File(absolutePath);
        if (!ffmpegFile.exists()) {
            loadRecourseFromJarByFolder("/system/" + relativePath, _temp, this.getClass());
            if (!isWindows) {
                Runtime runtime = Runtime.getRuntime();
                try {
                    runtime.exec(new String[]{"/bin/chmod", "755",
                            absolutePath});
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        this.path = absolutePath;
    }

    @Override
    protected String getFFMPEGExecutablePath() {
        return path;
    }
}