package com.example.config;

import com.alibaba.druid.pool.DruidDataSource;
import com.alibaba.druid.spring.boot.autoconfigure.DruidDataSourceBuilder;
import com.alibaba.druid.spring.boot.autoconfigure.properties.DruidStatProperties;
import com.alibaba.druid.util.Utils;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.web.servlet.FilterRegistrationBean;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;

import javax.servlet.*;
import javax.sql.DataSource;
import java.io.*;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.Map;
import java.util.Properties;

/**
 * @Company: 西安路泰科技有限公司
 * @Author: zhaowenxuan
 * @Date: 2024/7/1 10:27
 */
@Slf4j
@Configuration
public class DruidConfig {

    @Value("${config.path}")
    private String CONFIG_PATH;
    @Value("${config.dir}")
    private String CONFIG_DIR;

    private DruidDataSource dataSource;

    @Bean
    public DataSource masterDataSource(DruidProperties druidProperties){
        dataSource = DruidDataSourceBuilder.create().build();
        Properties props = new Properties();
        try {
            // 从文件中读取配置信息
            FileInputStream fis = null;
            try {
                fis = new FileInputStream(CONFIG_PATH);
            } catch (FileNotFoundException e) {
                log.info("数据库连接文件找不到 系统正在创建！");
                File f = new File(CONFIG_DIR);
                if(!f.exists()){
                    f.mkdirs();
                }
                File file = new File(CONFIG_PATH);
                try {
                    FileWriter fileWriter = new FileWriter(file);
                    fileWriter.write("ip = 你的主数据库连接ip地址\n");
                    fileWriter.write("prot = 你的主数据库连接端口\n");
                    fileWriter.write("name = 你的主数据库连接名称\n");
                    fileWriter.write("username = 你的主数据库连接用户名\n");
                    fileWriter.write("password = 你的主数据库连接密码\n");
                    fileWriter.write("\n");
                    fileWriter.write("hisenabled = 是否开启 his 从库数据库连接 (从数据源开关/默认关闭 fales)\n");
                    fileWriter.write("hisip = 你的 his 数据库连接ip地址\n");
                    fileWriter.write("hisprot = 你的 his 数据库连接端口\n");
                    fileWriter.write("hisname = 你的 his 数据库连接名称\n");
                    fileWriter.write("hisusername = 你的 his 数据库连接用户名\n");
                    fileWriter.write("hispassword = 你的 his 数据库连接密码\n");
                    fileWriter.write("\n");
                    fileWriter.write("pacsenabled = 是否开启pacs从库数据库连接 (从数据源开关/默认关闭 fales)\n");
                    fileWriter.write("pacsip = 你的pacs数据库连接ip地址\n");
                    fileWriter.write("pacsprot = 你的pacs数据库连接端口\n");
                    fileWriter.write("pacsname = 你的pacs数据库连接名称\n");
                    fileWriter.write("pacsusername = 你的pacs数据库连接用户名\n");
                    fileWriter.write("pacspassword = 你的pacs数据库连接密码\n");
                    fileWriter.write("\n");
                    fileWriter.write("lisenabled = 是否开启 lis 从库数据库连接 (从数据源开关/默认关闭 fales)\n");
                    fileWriter.write("lisip = 你的 lis 数据库连接ip地址\n");
                    fileWriter.write("lisprot = 你的 lis 数据库连接端口\n");
                    fileWriter.write("lisname = 你的 lis 数据库连接名称\n");
                    fileWriter.write("lisusername = 你的 lis 数据库连接用户名\n");
                    fileWriter.write("lispassword = 你的 lis 数据库连接密码\n");
                    fileWriter.close();
                    log.info("数据库连接文件创建成功！");
                } catch (IOException ioException) {
                    log.info("数据库连接文件创建失败  请联系管理员手动创建！");
                    ioException.printStackTrace();
                }
                e.printStackTrace();
            }
            props.load(fis);
            fis.close();
            // 获取属性值并赋值
            Properties properties = new Properties();
            // 这里是测试写法，具体的value可以通过请求参数传递过来
            properties.setProperty("druid.url","jdbc:mysql://"+props.getProperty("ip")+":"+props.getProperty("prot")+"/"+props.getProperty("name")+"" +
                    "?useUnicode=true&characterEncoding=utf8&zeroDateTimeBehavior=convertToNull&useSSL=false&serverTimezone=GMT%2B8");
            properties.setProperty("druid.username",props.getProperty("username"));
            properties.setProperty("druid.password",props.getProperty("password"));
            dataSource.restart(properties);
            log.info("数据库连接成功!!!");
        } catch (Exception e) {
            log.info("数据库连接失败  请联系管理员！");
            e.printStackTrace();
        }
        return druidProperties.dataSource(dataSource);
    }

    /**
     * 去除监控页面底部的广告
     */
    @SuppressWarnings({"rawtypes", "unchecked"})
    @Bean
    @ConditionalOnProperty(name = "spring.datasource.druid.statViewServlet.enabled", havingValue = "true")
    public FilterRegistrationBean removeDruidFilterRegistrationBean(DruidStatProperties properties) {
        // 获取web监控页面的参数
        DruidStatProperties.StatViewServlet config = properties.getStatViewServlet();
        // 提取common.js的配置路径
        String pattern = config.getUrlPattern() != null ? config.getUrlPattern() : "/druid/*";
        String commonJsPattern = pattern.replaceAll("\\*", "js/common.js");
        final String filePath = "support/http/resources/js/common.js";
        // 创建filter进行过滤
        Filter filter = new Filter() {
            @Override
            public void init(javax.servlet.FilterConfig filterConfig) throws ServletException {
            }

            @Override
            public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
                    throws IOException, ServletException {
                chain.doFilter(request, response);
                // 重置缓冲区，响应头不会被重置
                response.resetBuffer();
                // 获取common.js
                String text = Utils.readFromResource(filePath);
                // 正则替换banner, 除去底部的广告信息
                text = text.replaceAll("<a.*?banner\"></a><br/>", "");
                text = text.replaceAll("powered.*?shrek.wang</a>", "");
                response.getWriter().write(text);
            }

            @Override
            public void destroy() {
            }
        };
        FilterRegistrationBean registrationBean = new FilterRegistrationBean();
        registrationBean.setFilter(filter);
        registrationBean.addUrlPatterns(commonJsPattern);
        return registrationBean;
    }

    public void changeDataSource(Properties properties) throws SQLException {
        dataSource.restart(properties);
    }
}