// Package command ...
//
// Description : command ...
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 2022-05-20 22:34
package command

import (
	"path/filepath"
	"strings"

	"git.zhangdeman.cn/zhangdeman/util"

	"git.zhangdeman.cn/zhangdeman/command/define"
)

// NewLs ls命令
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 22:36 2022/5/20
func NewLs(workDir string) *ls {
	return &ls{
		workDir:     workDir,
		paramList:   []string{"-l"},
		relativeDir: "." + string(filepath.Separator),
	}
}

type ls struct {
	workDir     string
	paramList   []string
	isRecursive bool   // 是否递归查询
	relativeDir string // 相对目录
}

// ShowHideFile 显示隐藏文件
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 22:38 2022/5/20
func (l *ls) ShowHideFile() *ls {
	l.paramList = append(l.paramList, "-a")
	return l
}

// Recursive 递归查看所有目录下的文件
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 22:38 2022/5/20
func (l *ls) Recursive() *ls {
	l.paramList = append(l.paramList, "-R")
	return l
}

// Run 执行命令
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 22:59 2022/5/20
func (l *ls) Run() (*define.Result, []define.LsFileInfo) {
	result := Execute(l.workDir, "ls", l.paramList)
	if nil != result.Error {
		return result, make([]define.LsFileInfo, 0)
	}
	resultStr := string(result.Output)
	fileList := strings.Split(resultStr, "\n")
	fileListResult := make([]define.LsFileInfo, 0)
	for _, item := range fileList {
		if item == "." || item == ".." || len(item) == 0 {
			// 忽略 . 和 ..
			continue
		}
		itemArr := strings.Split(item, " ")
		if strings.ToLower(itemArr[0]) == "total" {
			// 过滤掉对于文件总数的输出
			continue
		}
		if len(itemArr) < 9 {
			// 设置目录
			if strings.HasPrefix(item, "."+string(filepath.Separator)) && strings.HasSuffix(item, ":") {
				l.relativeDir = strings.TrimRight(item, ":")
			}
			continue
		}
		fileListResult = append(fileListResult, l.parseFileInfo(item))
	}
	return result, fileListResult
}

// parseFileInfo 解析文件信息
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 17:35 2022/6/27
func (l *ls) parseFileInfo(fileLine string) define.LsFileInfo {
	fileInfoArrSource := strings.Split(fileLine, " ")
	fileInfoArr := make([]string, 0)
	for _, item := range fileInfoArrSource {
		if len(item) > 0 {
			fileInfoArr = append(fileInfoArr, item)
		}
	}
	fileInfo := define.LsFileInfo{}
	fileInfo.IsLink, fileInfo.IsDir, fileInfo.Permission = l.getFilePermission(fileInfoArr[0])
	// 是否链接 / 是否目录 / 文件权限解析
	fileInfo.Name = fileInfoArr[8]
	fileInfo.User = fileInfoArr[2]
	fileInfo.Group = fileInfoArr[3]
	fileInfo.ModifyTime = strings.Join(fileInfoArr[5:8], " ")
	_ = util.ConvertAssign(&fileInfo.Size, fileInfoArr[4])
	_ = util.ConvertAssign(&fileInfo.ReferenceCnt, fileInfoArr[1])
	if fileInfo.IsDir {
		fileInfo.Type = "-"
	} else {
		nameArr := strings.Split(fileInfo.Name, ".")
		if len(nameArr) < 2 {
			fileInfo.Type = "unknown"
		} else {
			fileInfo.Type = nameArr[len(nameArr)-1]
		}
	}

	if fileInfo.IsLink {
		fileInfo.SourcePath = fileInfoArr[10]
	}
	fileInfo.RelativePath = l.relativeDir
	fileInfo.FullPath = strings.ReplaceAll(l.workDir+string(filepath.Separator)+l.relativeDir, string(filepath.Separator)+"."+string(filepath.Separator), string(filepath.Separator))
	return fileInfo
}

// getFilePermission 解析文件权限信息 , 根据 drwxrwxrwx 这个规范解析
//
// Author : go_developer@163.com<白茶清欢>
//
// Date : 17:37 2022/6/27
func (l *ls) getFilePermission(permissionLayout string) (bool, bool, *define.FullPermission) {
	permissionArr := strings.Split(permissionLayout, "")
	if len(permissionArr) < 10 {
		return false, false, nil
	}
	return permissionArr[0] == "l", permissionArr[0] == "d", &define.FullPermission{
		User: define.FilePermission{
			Read:  permissionArr[1] == "r",
			Write: permissionArr[2] == "w",
			Exec:  permissionArr[3] == "x",
		},
		Group: define.FilePermission{
			Read:  permissionArr[4] == "r",
			Write: permissionArr[5] == "w",
			Exec:  permissionArr[6] == "x",
		},
		Other: define.FilePermission{
			Read:  permissionArr[7] == "r",
			Write: permissionArr[8] == "w",
			Exec:  permissionArr[9] == "x",
		},
	}
}