/**
 * @Author: likun
 * @Title: todo
 * @Description: todo
 * @File: node_init
 * @Date: 2024-11-08 14:02:42
 */
package node

import (
	"admin/lib/flags"
	"admin/lib/prom"
	"admin/lib/xlog"
	"admin/lib/xlog/handler"
	"encoding/json"
	"fmt"
	"github.com/rs/zerolog"
	"gopkg.in/yaml.v3"
	"io"
	"os"
	"time"
)

// initialize 初始化app
func (node *Node) initialize() {

	// 初始化节点启动参数，例如 ./app -a a -b b -c 123
	must(node.initBootFlags())

	// 初始化节点启动配置文件，例如config/app.yaml
	must(node.initBootConfig())

	// 初始化逻辑
	for _, j := range node.preInitFuncs {
		curErr := j.value.(Task)()
		if curErr != nil {
			err := fmt.Errorf("node run pre_initialize task(%s) return error:%v", j.key, curErr)
			panic(err)
		}
	}

	// 初始化程序日志系统
	must(node.initLog())

	// 初始化prometheus metrics、go pprof
	must(node.initTracer())

	// 初始化逻辑
	for _, j := range node.initFuncs {
		curErr := j.value.(Task)()
		if curErr != nil {
			err := fmt.Errorf("node run initialize task(%s) return error:%v", j.key, curErr)
			panic(err)
		}
	}
	return
}

func (node *Node) initBootFlags() error {
	var appBootFlags []interface{}
	for _, v := range node.adis {
		curApp := newApp(v.name, v.options...)
		node.apps = append(node.apps, curApp)
		if curApp.bootFlag == nil {
			continue
		}
		appBootFlags = append(appBootFlags, curApp.bootFlag)
	}

	// 解析启动参数
	flags.ParseWithStructPointers(append([]interface{}{node.bootFlags.globalBootFlag, node.bootFlags.exBootFlag}, appBootFlags...)...)

	flagBin, _ := json.Marshal(node.bootFlags.globalBootFlag)
	xlog.Noticef("os args:%+v, parsed flags:%v", os.Args, string(flagBin))

	// check
	if node.bootFlags.globalBootFlag.ServiceName == "" {
		if len(node.adis) > 1 {
			node.bootFlags.globalBootFlag.ServiceName = "all_in_one"
		} else {
			node.bootFlags.globalBootFlag.ServiceName = node.adis[0].name
		}
	}

	return nil
}

func (node *Node) initBootConfig() error {
	// 解析配置文件
	if node.bootConfigFile.globalBootConfigFileContent != nil && node.bootFlags.globalBootFlag.BootConfig != "" {
		err := node.parseWithConfigFileContent(true)
		if err != nil {
			newErr := fmt.Errorf("parse With Config File Content is error:%v", err)
			return newErr
		}

		// 定时解析配置文件
		ticker := time.NewTicker(time.Second * 3)
		go func() {
			for range ticker.C {
				// 解析配置文件
				err = node.parseWithConfigFileContent(false)
				if err != nil {
					xlog.Errorf("parse With Config File Content is error:%v", err)
					continue
				}
			}
		}()
	}

	return nil
}

func (node *Node) initLog() error {
	logConfig := &LogBootConfig{}
	if node.bootConfigFile.globalBootConfigFileContent != nil {
		logConfig = node.bootConfigFile.globalBootConfigFileContent.GetLogConfig().Check()
	}

	var (
		enableLogFile           = logConfig.EnableFile
		enableLogStdout         = logConfig.EnableStdout
		logDir                  = logConfig.LogDir
		logLevel                = logConfig.LogLevel
		nodeId                  = node.bootFlags.globalBootFlag.NodeID
		serviceName             = node.bootFlags.globalBootFlag.ServiceName
		maxLogFileBytesSize     = logConfig.LogFileSize * 1024 * 1024 * 1024
		maxLogRotateBackupCount = logConfig.LogFileRotateCount
	)

	// 初始化日志系统
	var logHandlers []io.Writer
	if !enableLogFile {
		// 没有指定日志输出目录，默认输出到控制台
		logHandlers = append(logHandlers, os.Stdout)
	} else {
		// 指定日志输出目录
		logHandler, err := handler.NewRotatingDayMaxFileHandler(logDir, serviceName, maxLogFileBytesSize, maxLogRotateBackupCount)
		if err != nil {
			newErr := fmt.Errorf("new xlog file handler with path [%v] name[%v] error:%v", logDir, serviceName, err)
			return newErr
		}
		logHandlers = append(logHandlers, logHandler)

		// 也指定输出到控制台
		if enableLogStdout {
			logHandlers = append(logHandlers, os.Stdout)
		}
	}

	// 创建logger
	logLevelEnum := xlog.ParseLogLevelString(logLevel)
	xlog.NewGlobalLogger(logHandlers, logLevelEnum, func(l zerolog.Logger) zerolog.Logger {
		return l.With().Str("service", serviceName).Str("node_id", nodeId).Logger()
	})

	return nil
}

func (node *Node) initTracer() error {
	node.tracer = prom.NewEngine(true)
	return nil
}

// 解析配置文件
func (node *Node) parseWithConfigFileContent(first bool) error {

	content, err := os.ReadFile(node.bootFlags.globalBootFlag.BootConfig)
	if err != nil {
		newErr := fmt.Errorf("load boot config file %v error:%v", node.bootFlags.globalBootFlag.BootConfig, err)
		return newErr
	}

	if node.bootConfigFile.globalBootConfigParser == nil {
		node.bootConfigFile.globalBootConfigParser = yaml.Unmarshal
	}

	oldContent, _ := json.Marshal(node.bootConfigFile.globalBootConfigFileContent)

	err = node.bootConfigFile.globalBootConfigParser(content, node.bootConfigFile.globalBootConfigFileContent)
	if err != nil {
		newErr := fmt.Errorf("load boot config file %v content %v ok, but parse content error:%v",
			node.bootFlags.globalBootFlag.BootConfig, string(content), err)
		return newErr
	}

	// 读取配置后设置一次日志等级
	if !first {
		xlog.SetLogLevel(xlog.ParseLogLevelString(node.bootConfigFile.globalBootConfigFileContent.GetLogConfig().LogLevel))
	}

	node.bootConfigFile.globalBootConfigFileContent.OnReload(first, string(oldContent))

	return nil
}

func must(err error) {
	if err != nil {
		panic(err)
	}
}