package com.ectrip.cyt.utils;

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.io.StreamCorruptedException;

import android.content.Context;
import android.content.SharedPreferences;
import android.content.SharedPreferences.Editor;
import android.os.Build;

import com.ectrip.cyt.config.MyApp;

/**
 * 2.0
 * SharedPreferences工具类
 */
public class SharedPreferences2Obj {

    private static SharedPreferences2Obj preferences2Obj=null;
    private Context context;
    private SharedPreferences sp;
    int __sdkLevel=10;

    private SharedPreferences2Obj(Context context) {
        this.context = context;
    }

    /**
     * @param name
     * 必须设置名字
     */
    public SharedPreferences2Obj setName(String name){
        try {
            sp=MyApp.getInstance().savePreToSDcard(name);
        } catch (Exception e) {
            e.printStackTrace();
            try {
                __sdkLevel= Build.VERSION.SDK_INT;
                sp=context.getSharedPreferences(name,
                        (__sdkLevel > Build.VERSION_CODES.FROYO) ? 4 : 0);
            } catch (Exception e1) {
                e1.printStackTrace();
            }
        }
        return this;
    }

    public static SharedPreferences2Obj getInstance(Context context){
        if(preferences2Obj==null){
            preferences2Obj=new SharedPreferences2Obj(context);
        }
        return preferences2Obj;
    }


    /**
     * 根据key和预期的value类型获取value的值
     *
     * @param key
     * @param clazz
     * @return
     */
    public <T> T getValue(String key, Class<T> clazz) {
        if (context == null) {
            throw new RuntimeException("请先调用带有context，name参数的构造！");
        }
        return getValue(key, clazz, sp);
    }

    /**
     * 清除所有数据
     */
    public void clear(){
        try {
            Editor editor = sp.edit();
            editor.clear();
            editor.commit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    public void clearKeyVal(String key){
        try {
            Editor editor = sp.edit();
            editor.putString(key,"");
            editor.commit();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 针对复杂类型存储<对象>
     *
     * @param key
     * @param val
     */
    public void setObject(String key, Object object) {
        ByteArrayOutputStream baos=null;
        ObjectOutputStream out = null;
        try {
            baos= new ByteArrayOutputStream();
            out = new ObjectOutputStream(baos);
            out.writeObject(object);
            String objectVal = new String(Base64.encode(baos.toByteArray()));
            Editor editor = sp.edit();
            editor.putString(key, objectVal);
            editor.commit();

        } catch (IOException e) {
            e.printStackTrace();
        }catch(Exception e){
            e.printStackTrace();
        }finally {
            try {
                if (baos != null) {
                    baos.close();
                }
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }

    @SuppressWarnings("unchecked")
    public <T> T getObject(String key, Class<T> clazz) {
        if (sp.contains(key)) {
            String objectVal =null;
            byte[] buffer =null;
            ByteArrayInputStream bais=null;
            ObjectInputStream ois = null;
            try {
                objectVal=sp.getString(key, null);
                buffer= Base64.decode(objectVal);
                bais = new ByteArrayInputStream(buffer);
                ois = new ObjectInputStream(bais);
                T t = (T) ois.readObject();
                return t;
            } catch (StreamCorruptedException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } catch (ClassNotFoundException e) {
                e.printStackTrace();
            }catch(Exception e){
                e.printStackTrace();
            } finally {
                try {
                    if (bais != null) {
                        bais.close();
                    }
                    if (ois != null) {
                        ois.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
        return null;
    }

    /**
     * 对于外部不可见的过渡方法
     *
     * @param key
     * @param clazz
     * @param sp
     * @return
     */
    @SuppressWarnings("unchecked")
    private <T> T getValue(String key, Class<T> clazz, SharedPreferences sp) {
        T t;
        try {

            t = clazz.newInstance();

            if (t instanceof Integer) {
                return (T) Integer.valueOf(sp.getInt(key, 0));
            } else if (t instanceof String) {
                return (T) sp.getString(key, "");
            } else if (t instanceof Boolean) {
                return (T) Boolean.valueOf(sp.getBoolean(key, false));
            } else if (t instanceof Long) {
                return (T) Long.valueOf(sp.getLong(key, 0L));
            } else if (t instanceof Float) {
                return (T) Float.valueOf(sp.getFloat(key, 0L));
            }
        } catch (InstantiationException e) {
            e.printStackTrace();
            LogUtil.e("system", "类型输入错误或者复杂类型无法解析[" + e.getMessage() + "]");
        } catch (IllegalAccessException e) {
            e.printStackTrace();
            LogUtil.e("system", "类型输入错误或者复杂类型无法解析[" + e.getMessage() + "]");
        }catch(Exception e){
            e.printStackTrace();
            LogUtil.e("system", "无法找到" + key + "对应的值");
        }

        return null;
    }
}