package ldap

import (
	"github.com/go-ldap/ldap/v3"
)

// Options holds package configuration
type Options struct {
	URI    string
	UserDn string
}

// LDAP authentification backend
type LDAP struct {
	Cfg  *Options
	Conn *ldap.Conn
}

// Login tries to bind to LDAP
// Returns (true, nil) if success
func (a LDAP) Login(username string, password string) (bool, error) {
	// Try to bind as user
	bindDn := "cn=" + username + "," + a.Cfg.UserDn
	err := a.Conn.Bind(bindDn, password)
	if err != nil {
		return false, err
	}

	// Login succeeded
	return true, nil
}

// Close LDAP connection
func (a LDAP) Close() {
	a.Conn.Close()
}

// NewLDAP instanciate a new LDAP connection
func NewLDAP(cfg *Options) (LDAP, error) {
	backend := LDAP{Cfg: cfg}

	// Connect to LDAP server
	c, err := ldap.DialURL(backend.Cfg.URI)
	backend.Conn = c
	return backend, err
}