package pnyx

import (
	"crypto/ed25519"
	"crypto/rand"
	"net"
	"slices"
	"testing"
)

func fatalErr(t *testing.T, err error) {
  if err != nil {
    t.Fatal(err)
  }
}

func TestSessionOpen(t *testing.T) {
  client_pubkey, client_key, err := ed25519.GenerateKey(rand.Reader)
  fatalErr(t, err)

  session_open, client_ecdh, err := NewSessionOpen(client_key)
  fatalErr(t, err)

  client_pubkey_parsed, client_ecdh_parsed, err := ParseSessionOpen(session_open[COMMAND_LENGTH:])
  fatalErr(t, err)

  if slices.Compare(client_pubkey, client_pubkey_parsed) != 0 {
    t.Fatalf("Client Pubkey %x does not match parsed %x", client_pubkey, client_pubkey_parsed)
  }

  if slices.Compare(client_ecdh.Public().(ed25519.PublicKey), client_ecdh_parsed) != 0 {
    t.Fatalf("Client Pubkey %x does not match parsed %x", client_pubkey, client_pubkey_parsed)
  }
}

func TestECDH(t *testing.T) {
  client_public, client_private, err := ed25519.GenerateKey(rand.Reader)
  fatalErr(t, err)

  server_public, server_private, err := ed25519.GenerateKey(rand.Reader)
  fatalErr(t, err)

  server_secret, err := ECDH(client_public, server_private)
  fatalErr(t, err)

  client_secret, err := ECDH(server_public, client_private)
  fatalErr(t, err)

  if slices.Compare(server_secret, client_secret) != 0 {
    t.Fatalf("Server and Client secrets do not match")
  }
}

func TestSessionConnect(t *testing.T) {
  secret := make([]byte, 32)
  test_addr, err := net.ResolveUDPAddr("udp", "127.0.0.1:8080")
  fatalErr(t, err)

  session_connect := NewSessionConnect(test_addr, secret)
  parsed_addr, err := ParseSessionConnect(session_connect[COMMAND_LENGTH + ID_LENGTH:], secret)
  fatalErr(t, err)

  if parsed_addr.String() != test_addr.String() {
    t.Fatalf("Parsed address(%s) does not match test address(%s)", parsed_addr, test_addr)
  }
}