package config

import "fmt"

type Interface struct {
	Zone      string           `yaml:"zone"`
	Interface string           `yaml:"interface"`
	Options   InterfaceOptions `yaml:"options,omitempty"`
}

type InterfaceOptions struct {
	DHCP      bool `yaml:"dhcp,omitempty"`
	TCPFlags  bool `yaml:"tcpflags,omitempty"`
	NoSmurfs  bool `yaml:"nosmurfs,omitempty"`
	RouteBack bool `yaml:"routeback,omitempty"`
	Bridge    bool `yaml:"bridge,omitempty"`
	Optional  bool `yaml:"optional,omitempty"`
}

func (c *Config) validateInterfaces() error {
	seen := make(map[string]bool)
	for i, iface := range c.Interfaces {
		if iface.Interface == "" {
			return fmt.Errorf("interface[%d]: interface name required", i)
		}
		if iface.Zone == "" {
			return fmt.Errorf("interface[%d] %q: zone required", i, iface.Interface)
		}
		if _, ok := c.Zones[iface.Zone]; !ok {
			return fmt.Errorf("interface[%d] %q: zone %q not defined", i, iface.Interface, iface.Zone)
		}
		if seen[iface.Interface] {
			return fmt.Errorf("interface[%d]: duplicate interface %q", i, iface.Interface)
		}
		seen[iface.Interface] = true
	}
	return nil
}