package conf

import (
	`io/fs`
	`os`
	`os/user`
	`strconv`

	`r00t2.io/sysutils/paths`
)

// Chmod enforces perms for a file or directory.
func (p *Perms) Chmod(path string, isNew bool) (err error) {

	var fi fs.FileInfo

	if err = paths.RealPath(&path); err != nil {
		return
	}
	if fi, err = os.Stat(path); err != nil {
		return
	}

	// If we add additional spec types (e.g. sockets, etc.), make this a switch.
	if fi.IsDir() {
		if p.ParentDir != nil {
			if err = p.ParentDir.chmod(path, isNew); err != nil {
				return
			}
		}
	} else {
		if p.File != nil {
			if err = p.File.chmod(path, isNew); err != nil {
				return
			}
		}
	}

	return
}

// Chown enforces owner/group for a file or directory.
func (p *Perms) Chown(path string) (err error) {

	var fi fs.FileInfo

	if err = paths.RealPath(&path); err != nil {
		return
	}

	// If we add additional spec types (e.g. sockets, etc.), make this a switch.
	if fi.IsDir() {
		if p.ParentDir != nil {
			if err = p.ParentDir.chown(path); err != nil {
				return
			}
		}
	} else {
		if p.File != nil {
			if err = p.File.chown(path); err != nil {
				return
			}
		}
	}

	return
}

// SetMissing populates any missing fields.
func (p *Perms) SetMissing() (err error) {

	if p.curUser == nil {
		if p.curUser, err = user.Current(); err != nil {
			return
		}
		if p.curUid, err = strconv.Atoi(p.curUser.Uid); err != nil {
			return
		}
	}
	if p.curGroup == nil {
		if p.curGroup, err = user.LookupGroupId(p.curGroup.Gid); err != nil {
			return
		}
		if p.curGid, err = strconv.Atoi(p.curGroup.Gid); err != nil {
			return
		}
	}

	if p.File == nil {
		p.File = new(PermSpec)
	}
	p.File.parent = p
	if p.ParentDir == nil {
		p.ParentDir = new(PermSpec)
	}
	p.ParentDir.parent = p

	if err = p.File.setMissing(false); err != nil {
		return
	}
	if err = p.ParentDir.setMissing(true); err != nil {
		return
	}

	return
}