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/*
 * Copyright (C) 2013 Snowdream Mobile 
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *         http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.github.snowdream.android.util;

import android.text.TextUtils;
import android.util.Log;

import java.io.*;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;


/**
 * Write the Log to the file
 * 
 * Created by snowdream on 10/20/13.
 */
public class Log2File {

    private static ExecutorService executor = null;

    /**
     * Get the ExecutorService
     *
     * @return the ExecutorService
     */
    protected static ExecutorService getExecutor() {
        return executor;
    }

    /**
     * Set the ExecutorService
     *
     * @param executor the ExecutorService
     */
    protected static void setExecutor(ExecutorService executor) {
        Log2File.executor = executor;
    }

    protected static void log2file(final String path, final String str) {
        if (executor == null) {
            executor = Executors.newSingleThreadExecutor();
        }

        if (executor != null) {
            executor.execute(new Runnable() {
                @Override
                public void run() {
                    PrintWriter out = null;

                    File file = GetFileFromPath(path);

                    try {
                        out = new PrintWriter(new BufferedWriter(new FileWriter(file, true)));
                        out.println(str);
                        out.flush();
                    } catch (IOException e) {
                        e.printStackTrace();
                    } finally {
                        out.close();
                    }
                }
            });
        }
    }

    /**
     * Get File form the file path.

     * if the file does not exist, create it and return it.
     *
     * @param path the file path
     * @return the file
     */
    private static File GetFileFromPath(String path) {
        boolean ret;
        boolean isExist;
        boolean isWritable;
        File file = null;

        if (TextUtils.isEmpty(path)) {
            Log.e("Error", "The path of Log file is Null.");
            return file;
        }

        file = new File(path);

        isExist = file.exists();
        isWritable = file.canWrite();

        if (isExist) {
            if (isWritable) {
                //Log.i("Success", "The Log file exist,and can be written! -" + file.getAbsolutePath());
            } else {
                Log.e("Error", "The Log file can not be written.");
            }
        } else {
            //create the log file
            try {
                ret = file.createNewFile();
                if (ret) {
                    Log.i("Success", "The Log file was successfully created! -" + file.getAbsolutePath());
                } else {
                    Log.i("Success", "The Log file exist! -" + file.getAbsolutePath());
                }

                isWritable = file.canWrite();
                if (!isWritable) {
                    Log.e("Error", "The Log file can not be written.");
                }
            } catch (IOException e) {
                Log.e("Error", "Failed to create The Log file.");
                e.printStackTrace();
            }
        }

        return file;
    }
}