/**
 * Copyright (c) 2015-2016, Chill Zhuang 庄骞 (smallchill@163.com).
 * <p>
 * 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
 * <p>
 * http://www.apache.org/licenses/LICENSE-2.0
 * <p>
 * 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.stylefeng.guns.core.util;

import com.stylefeng.guns.core.support.StrKit;

import java.io.IOException;
import java.io.PrintWriter;
import java.io.StringWriter;
import java.lang.reflect.Array;
import java.util.*;
import java.util.Map.Entry;

/**
 * 高频方法集合类
 */
public class ToolUtil {

    /**
     * 获取异常的具体信息
     *
     * @author fengshuonan
     * @Date 2017/3/30 9:21
     * @version 2.0
     */
    public static String getExceptionMsg(Exception e) {
        StringWriter sw = new StringWriter();
        try{
            e.printStackTrace(new PrintWriter(sw));
        }finally {
            try {
                sw.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }
        return sw.getBuffer().toString().replaceAll("\\$","T");
    }

    /**
     * @Description 主键id
     * @author fengshuonan
     */
    public static String getUid() {
        return getRandomNum();
    }

    /**
     * @Description 随机数字
     * @author fengshuonan
     */
    public static String getRandomNum() {
        return Calendar.getInstance().getTimeInMillis() + generateCellPhoneValNum();
    }

    /**
     * @Description 获取电话号码
     * @author fengshuonan
     */
    public static String generateCellPhoneValNum() {
        String[] beforeShuffle = new String[]{"1", "2", "3", "4", "5", "6",
                "7", "8", "9", "0"};
        List<String> list = Arrays.asList(beforeShuffle);
        Collections.shuffle(list);
        StringBuilder buffer = new StringBuilder();
        for (int i = 0; i < list.size(); i++) {
            buffer.append(list.get(i));
        }
        String afterShuffle = buffer.toString();
        String result = afterShuffle.substring(3, 9);
        return result;
    }

    /**
     * 比较两个对象是否相等。<br>
     * 相同的条件有两个，满足其一即可：<br>
     * 1. obj1 == null && obj2 == null; 2. obj1.equals(obj2)
     *
     * @param obj1 对象1
     * @param obj2 对象2
     * @return 是否相等
     */
    public static boolean equals(Object obj1, Object obj2) {
        return (obj1 != null) ? (obj1.equals(obj2)) : (obj2 == null);
    }

    /**
     * 计算对象长度，如果是字符串调用其length函数，集合类调用其size函数，数组调用其length属性，其他可遍历对象遍历计算长度
     *
     * @param obj 被计算长度的对象
     * @return 长度
     */
    public static int length(Object obj) {
        if (obj == null) {
            return 0;
        }
        if (obj instanceof CharSequence) {
            return ((CharSequence) obj).length();
        }
        if (obj instanceof Collection) {
            return ((Collection<?>) obj).size();
        }
        if (obj instanceof Map) {
            return ((Map<?, ?>) obj).size();
        }

        int count;
        if (obj instanceof Iterator) {
            Iterator<?> iter = (Iterator<?>) obj;
            count = 0;
            while (iter.hasNext()) {
                count++;
                iter.next();
            }
            return count;
        }
        if (obj instanceof Enumeration) {
            Enumeration<?> enumeration = (Enumeration<?>) obj;
            count = 0;
            while (enumeration.hasMoreElements()) {
                count++;
                enumeration.nextElement();
            }
            return count;
        }
        if (obj.getClass().isArray() == true) {
            return Array.getLength(obj);
        }
        return -1;
    }

    /**
     * 对象中是否包含元素
     *
     * @param obj     对象
     * @param element 元素
     * @return 是否包含
     */
    public static boolean contains(Object obj, Object element) {
        if (obj == null) {
            return false;
        }
        if (obj instanceof String) {
            if (element == null) {
                return false;
            }
            return ((String) obj).contains(element.toString());
        }
        if (obj instanceof Collection) {
            return ((Collection<?>) obj).contains(element);
        }
        if (obj instanceof Map) {
            return ((Map<?, ?>) obj).values().contains(element);
        }

        if (obj instanceof Iterator) {
            Iterator<?> iter = (Iterator<?>) obj;
            while (iter.hasNext()) {
                Object o = iter.next();
                if (equals(o, element)) {
                    return true;
                }
            }
            return false;
        }
        if (obj instanceof Enumeration) {
            Enumeration<?> enumeration = (Enumeration<?>) obj;
            while (enumeration.hasMoreElements()) {
                Object o = enumeration.nextElement();
                if (equals(o, element)) {
                    return true;
                }
            }
            return false;
        }
        if (obj.getClass().isArray() == true) {
            int len = Array.getLength(obj);
            for (int i = 0; i < len; i++) {
                Object o = Array.get(obj, i);
                if (equals(o, element)) {
                    return true;
                }
            }
        }
        return false;
    }

    /**
     * 对象是否不为空(新增)
     *
     * @param obj String,List,Map,Object[],int[],long[]
     * @return
     */
    public static boolean isNotEmpty(Object o) {
        return !isEmpty(o);
    }

    /**
     * 对象是否为空
     *
     * @param obj String,List,Map,Object[],int[],long[]
     * @return
     */
    @SuppressWarnings("rawtypes")
    public static boolean isEmpty(Object o) {
        if (o == null) {
            return true;
        }
        if (o instanceof String) {
            if (o.toString().trim().equals("")) {
                return true;
            }
        } else if (o instanceof List) {
            if (((List) o).size() == 0) {
                return true;
            }
        } else if (o instanceof Map) {
            if (((Map) o).size() == 0) {
                return true;
            }
        } else if (o instanceof Set) {
            if (((Set) o).size() == 0) {
                return true;
            }
        } else if (o instanceof Object[]) {
            if (((Object[]) o).length == 0) {
                return true;
            }
        } else if (o instanceof int[]) {
            if (((int[]) o).length == 0) {
                return true;
            }
        } else if (o instanceof long[]) {
            if (((long[]) o).length == 0) {
                return true;
            }
        }
        return false;
    }

    /**
     * 对象组中是否存在 Empty Object
     *
     * @param os 对象组
     * @return
     */
    public static boolean isOneEmpty(Object... os) {
        for (Object o : os) {
            if (isEmpty(o)) {
                return true;
            }
        }
        return false;
    }

    /**
     * 对象组中是否全是 Empty Object
     *
     * @param os
     * @return
     */
    public static boolean isAllEmpty(Object... os) {
        for (Object o : os) {
            if (!isEmpty(o)) {
                return false;
            }
        }
        return true;
    }

    /**
     * 是否为数字
     *
     * @param obj
     * @return
     */
    public static boolean isNum(Object obj) {
        try {
            Integer.parseInt(obj.toString());
        } catch (Exception e) {
            return false;
        }
        return true;
    }

    /**
     * 如果为空, 则调用默认值
     *
     * @param str
     * @return
     */
    public static Object getValue(Object str, Object defaultValue) {
        if (isEmpty(str)) {
            return defaultValue;
        }
        return str;
    }

    /**
     * 格式化文本
     *
     * @param template 文本模板，被替换的部分用 {} 表示
     * @param values   参数值
     * @return 格式化后的文本
     */
    public static String format(String template, Object... values) {
        return StrKit.format(template, values);
    }

    /**
     * 格式化文本
     *
     * @param template 文本模板，被替换的部分用 {key} 表示
     * @param map      参数值对
     * @return 格式化后的文本
     */
    public static String format(String template, Map<?, ?> map) {
        return StrKit.format(template, map);
    }

    /**
     * 强转->string,并去掉多余空格
     *
     * @param str
     * @return
     */
    public static String toStr(Object str) {
        return toStr(str, "");
    }

    /**
     * 强转->string,并去掉多余空格
     *
     * @param str
     * @param defaultValue
     * @return
     */
    public static String toStr(Object str, String defaultValue) {
        if (null == str) {
            return defaultValue;
        }
        return str.toString().trim();
    }

    /**
     * 强转->int
     *
     * @param obj
     * @return
     */
//	public static int toInt(Object value) {
//		return toInt(value, -1);
//	}

    /**
     * 强转->int
     *
     * @param obj
     * @param defaultValue
     * @return
     */
//	public static int toInt(Object value, int defaultValue) {
//		return Convert.toInt(value, defaultValue);
//	}

    /**
     * 强转->long
     *
     * @param obj
     * @return
     */
//	public static long toLong(Object value) {
//		return toLong(value, -1);
//	}

    /**
     * 强转->long
     *
     * @param obj
     * @param defaultValue
     * @return
     */
//	public static long toLong(Object value, long defaultValue) {
//		return Convert.toLong(value, defaultValue);
//	}
//
//	public static String encodeUrl(String url) {
//		return URLKit.encode(url, CharsetKit.UTF_8);
//	}
//
//	public static String decodeUrl(String url) {
//		return URLKit.decode(url, CharsetKit.UTF_8);
//	}

    /**
     * map的key转为小写
     *
     * @param map
     * @return Map<String,Object>
     */
    public static Map<String, Object> caseInsensitiveMap(Map<String, Object> map) {
        Map<String, Object> tempMap = new HashMap<>();
        for (String key : map.keySet()) {
            tempMap.put(key.toLowerCase(), map.get(key));
        }
        return tempMap;
    }

    /**
     * 获取map中第一个数据值
     *
     * @param <K> Key的类型
     * @param <V> Value的类型
     * @param map 数据源
     * @return 返回的值
     */
    public static <K, V> V getFirstOrNull(Map<K, V> map) {
        V obj = null;
        for (Entry<K, V> entry : map.entrySet()) {
            obj = entry.getValue();
            if (obj != null) {
                break;
            }
        }
        return obj;
    }

    /**
     * 创建StringBuilder对象
     *
     * @return StringBuilder对象
     */
    public static StringBuilder builder(String... strs) {
        final StringBuilder sb = new StringBuilder();
        for (String str : strs) {
            sb.append(str);
        }
        return sb;
    }

    /**
     * 创建StringBuilder对象
     *
     * @return StringBuilder对象
     */
    public static void builder(StringBuilder sb, String... strs) {
        for (String str : strs) {
            sb.append(str);
        }
    }

    /**
     * 去掉指定后缀
     *
     * @param str    字符串
     * @param suffix 后缀
     * @return 切掉后的字符串，若后缀不是 suffix， 返回原字符串
     */
    public static String removeSuffix(String str, String suffix) {
        if (isEmpty(str) || isEmpty(suffix)) {
            return str;
        }

        if (str.endsWith(suffix)) {
            return str.substring(0, str.length() - suffix.length());
        }
        return str;
    }
}