package main

import (
	"fmt"

	"github.com/julienschmidt/httprouter"
)

func init() {
	router.GET("/api/ips", apiHandler(showIPs))
	router.GET("/api/students/:sid/ips", apiHandler(studentHandler(func(student Student, body []byte) (interface{}, error) {
		return getStudentIPs(student), nil
	})))
}

func (s Student) IPSuffix() int64 {
	return s.Id * 5 + 10
}

func showIPs(_ httprouter.Params, body []byte) (interface{}, error) {
	r := make(map[string]map[string]string)

	students, err := getStudents()
	if err != nil {
		return nil, err
	}

	for _, std := range students {
		sid := fmt.Sprintf("%d", std.Id)

		r[sid] = getStudentIPs(std)

		if std.MAC == nil {
			continue
		}

		r[sid]["mac"] = *std.MAC
	}

	return r, nil
}

func getStudentIPs(student Student) (r map[string]string) {
	r = make(map[string]string)

	r["vlan0"] = fmt.Sprintf("172.23.0.%d", student.IPSuffix())
	r["vlan7"] = fmt.Sprintf("172.23.142.%d", student.IPSuffix())
	r["wg"] = studentIP(student.Id).String()
	r["adn"] = student.myAssociatedDomain()
	r["ddn"] = student.MyDelegatedDomain()

	return
}