#!/usr/bin/bash

source ./color.sh

# 检查执行用户
if [ $UID -ne 0 ];then
	red "请使用过ROOT用户执行脚本"
	exit 1
fi

# mysql 安装检查
[[ -f /etc/my.cnf ]] || [[ -d /var/lib/mysql ]] || [[ -f /usr/bin/mysql ]] && \
yellow "经检查发现，当前系统曾安装过mysql数据库，是否进行备份后卸载操作[Y|N]"
read modify
modify=${modify:="N"}
if [ $modify = 'Y' ];then
	systemctl stop mysqld mariadb &>/dev/null
	yum remove `rpm -qa |grep mysql`
	yum remove `rpm -qa |grep maraidb`
	mkdir -p /db-save/{conf,log,data}
	mv /etc/my.cnf /db-save/conf
	mv /var/log/mysql* /db-save/log
	mv /var/log/mariadb* /db-save/log
	mv /var/lib/mysql/* /db-save/data
	userdel -r -f mysql
	yellow "我们为您将数据备份到了/db-save目录下"
else
	green "为了您的数据安全，我们并未进行任何操作"
	exit 0
fi

# 网络检查
ping -w1 -c1 www.baidu.com &>/dev/null
if [ $? -ne 0 ] ;then
	red "网络异常"
	exit 2
fi

# yum源检查
cd /etc/yum.repos.d/ && \
rename .repo .repo.bak *.repo
curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
yum install -y epel-release yum-utils && \
green "yum源成功安装"


green "开始安装mysql yum源"
yum install -y https://dev.mysql.com/get/mysql80-community-release-el7-3.noarch.rpm
green "请输入安装的版本[80|57|56|55](default:57)："
read level
green "请输入初始密码："
read -s passwd
level=${level:=57}
case $level in
80)
	yum -y install mysql-community-server
	;;
*)
	yum-config-manager --disable mysql80-community
	yum-config-manager --enable mysql${level}-community
	yum -y install mysql-community-server
	;;
esac

systemctl enable mysqld && systemctl start mysqld  && green "mysql安装完成并且成功启动" || red "mysql 安装失败请检查"
yellow "mysql 5.6及以下版本没有初始密码"
[[ -f /var/log/mysqld.log ]] && mysql_passwd=$(grep password /var/log/mysqld.log| awk '{print $NF}') || red "数据库日志异常，请手动更新初始密码"
[[ ! -z mysql_passwd ]] && mysqladmin -p"$mysql_passwd" password "$passwd" && green "密码修改成功：原密码:$mysql_passwd 新密码: $passwd" || red "密码修改出错，请手动修改"