package db

import (
	"errors"
	"net/netip"
	"net/url"
	"strings"
)

var (
	ErrInvalidIP   = errors.New("invalid IP")
	ErrInvalidPort = errors.New("invalid port")
)

func Config_Sanitize(c *Config) {
	if u, err := url.Parse(c.HubAddress); err == nil {
		c.HubAddress = u.String()
	}

	if addr, ok := netip.AddrFromSlice(c.VPNNetwork); ok {
		c.VPNNetwork = addr.AsSlice()
	}
}

func Config_Validate(c *Config) error {
	if _, err := url.Parse(c.HubAddress); err != nil {
		return err
	}

	addr, ok := netip.AddrFromSlice(c.VPNNetwork)
	if !ok || !addr.Is4() || addr.As4()[3] != 0 || addr.As4()[0] == 0 {
		return ErrInvalidIP
	}

	return nil
}

func Session_Sanitize(s *Session) {
}

func Session_Validate(s *Session) error {
	return nil
}

func Peer_Sanitize(p *Peer) {
	p.Name = strings.TrimSpace(p.Name)
	if len(p.PublicIP) != 0 {
		addr, ok := netip.AddrFromSlice(p.PublicIP)
		if ok && addr.Is4() {
			p.PublicIP = addr.AsSlice()
		}
	}
	if p.Port == 0 {
		p.Port = 456
	}
}

func Peer_Validate(p *Peer) error {
	if len(p.PublicIP) > 0 {
		_, ok := netip.AddrFromSlice(p.PublicIP)
		if !ok {
			return ErrInvalidIP
		}
	}
	if p.Port == 0 {
		return ErrInvalidPort
	}
	return nil
}