package main

import (
	"os"
	"regexp"
	"strconv"
	"strings"

	"lc/common/protocol"
	"lc/common/util"
)

func HandleFile(topic string, obj *protocol.Pack_SeqFileObject) error {
	switch topic {
	case protocol.TP_GW_SET_APP:
		var app protocol.AppConfig
		if err := json.UnmarshalFromString(obj.Data.Content, &app); err != nil {
			return err
		}
		return SaveFile(obj.Data.File, obj.Data.Content, 0)
	case protocol.TP_GW_SET_SERIAL:
		sc := protocol.SerialConfig{Serial: make(map[uint8]*protocol.SerialPort)}
		if err := json.UnmarshalFromString(obj.Data.Content, &sc); err != nil {
			return err
		}
		return SaveFile(obj.Data.File, obj.Data.Content, 0)
	case protocol.TP_GW_SET_RTU:
		var rtu protocol.MapDevConfig
		if err := json.UnmarshalFromString(obj.Data.Content, &rtu); err != nil {
			return err
		}
		return SaveFile(obj.Data.File, obj.Data.Content, 1)
	case protocol.TP_GW_SET_MODEL:
		var iot protocol.IotModel
		if err := json.UnmarshalFromString(obj.Data.Content, &iot); err != nil {
			return err
		}
		return SaveFile(obj.Data.File, obj.Data.Content, 2)
	}
	return nil
}

func SaveFile(fname, content string, flag uint8) error {
	var SavePath string
	switch flag {
	case 0:
		SavePath = util.GetPath(0)
	case 1:
		SavePath = util.GetPath(1)
	case 2:
		SavePath = util.GetPath(2)
	}
	tmpPath := util.GetPath(4)
	util.GetTagLog().Infof("sys", "SaveFile:开始,fname=%s,flag=%d,tmpPath=%s,savePath=%s", fname, flag, tmpPath, SavePath)

	//存成临时文件
	if err := os.MkdirAll(tmpPath, os.ModePerm); err != nil {
		util.GetTagLog().Errorf("sys", "SaveFile:MkdirAll失败,path=%s,err=%v", tmpPath, err)
		return err
	}
	if err := os.WriteFile(tmpPath+fname, []byte(content), os.ModePerm); err != nil {
		util.GetTagLog().Errorf("sys", "SaveFile:写tmp文件失败,path=%s,err=%v", tmpPath+fname, err)
		return err
	}
	util.GetTagLog().Infof("sys", "SaveFile:tmp文件写入成功,path=%s,len=%d", tmpPath+fname, len(content))

	//备份原文件（不存在则跳过）
	if _, err := os.Stat(SavePath + fname); err == nil {
		if err := os.Rename(SavePath+fname, SavePath+fname+".bak"); err != nil {
			util.GetTagLog().Errorf("sys", "SaveFile:备份失败,src=%s,err=%v", SavePath+fname, err)
			return err
		}
		util.GetTagLog().Infof("sys", "SaveFile:备份成功,src=%s", SavePath+fname+".bak")
	} else {
		util.GetTagLog().Infof("sys", "SaveFile:原文件不存在，跳过备份,path=%s", SavePath+fname)
	}

	//拷贝新文件
	if err := os.Rename(tmpPath+fname, SavePath+fname); err != nil {
		util.GetTagLog().Errorf("sys", "SaveFile:替换失败,src=%s,dst=%s,err=%v", tmpPath+fname, SavePath+fname, err)
		//拷贝失败，则还原文件
		if err := os.Rename(SavePath+fname+".bak", SavePath+fname); err != nil {
			util.GetTagLog().Errorf("sys", "SaveFile:还原失败,src=%s,err=%v", SavePath+fname+".bak", err)
		}
		return err
	}
	util.GetTagLog().Infof("sys", "SaveFile:替换成功,path=%s", SavePath+fname)
	return nil
}

func ReadFileContent(topic string, o *protocol.Pack_SeqFileObject) {
	switch topic {
	case protocol.TP_GW_APP:
		if buf, err := os.ReadFile(util.GetPath(0) + "app.json"); err == nil {
			o.Data.File = "app.json"
			o.Data.Content = string(buf)
		}
	case protocol.TP_GW_SERIAL:
		if buf, err := os.ReadFile(util.GetPath(0) + "serial.json"); err == nil {
			o.Data.File = "serial.json"
			o.Data.Content = string(buf)
		}
	}
}

func ReadMutilFileContent(topic string, id uint, o *protocol.Pack_MutilFileObject) {
	var FileDir string
	if topic == protocol.TP_GW_RTU {
		FileDir = util.GetPath(1)
	} else if topic == protocol.TP_GW_MODEL {
		FileDir = util.GetPath(2)
	} else if topic == protocol.TP_GW_LOG {
		FileDir = util.GetPath(3)
	} else if topic == protocol.TP_GW_APP || topic == protocol.TP_GW_SERIAL {
		FileDir = util.GetPath(0)
	}

	//RTU或模型文件
	if topic == protocol.TP_GW_RTU || topic == protocol.TP_GW_MODEL {
		if id > 0 {
			fname := strconv.Itoa(int(id)) + ".json"
			AddFileObject(FileDir, fname, o)
		} else {
			rd, _ := os.ReadDir(FileDir)
			for _, fi := range rd {
				if !fi.IsDir() {
					ok, _ := regexp.MatchString(`[1-9].*json`, fi.Name())
					if ok {
						AddFileObject(FileDir, fi.Name(), o)
					}
				}
			}
		}
	} else if topic == protocol.TP_GW_LOG { //日志
		rd, _ := os.ReadDir(FileDir)
		for _, fi := range rd {
			if !fi.IsDir() {
				ok := strings.HasSuffix(fi.Name(), ".log")
				if ok {
					AddFileObject(FileDir, fi.Name(), o)
				}
			}
		}
	} else if topic == protocol.TP_GW_APP {
		AddFileObject(FileDir, "app.json", o)
	} else if topic == protocol.TP_GW_SERIAL {
		AddFileObject(FileDir, "serial.json", o)
	}
}

func AddFileObject(fpath, fname string, o *protocol.Pack_MutilFileObject) {
	if buf, err := os.ReadFile(fpath + fname); err == nil {
		var fo protocol.FileObject
		fo.File = fname
		fo.Content = string(buf)
		o.Data.Files = append(o.Data.Files, fo)
	}
}