package plugctl

import (
	"bytes"
	"crypto/rand"
	"encoding/base64"
	"io"
	"testing"
)

func TestDecrypt(t *testing.T) {
	// on message from hs100.sh
	in64 := "AAAAKtDygfiL/5r31e+UtsWg1Iv5nPCR6LfEsNGlwOLYo4HyhueT9tTu36Lfog=="
	in, err := base64.StdEncoding.DecodeString(in64)
	if err != nil {
		t.Fatalf("base64.DecodeString(%q) error: %v", in64, err)
	}
	t.Logf("in[:4] = %v", in[:4])
	in = in[4:]
	want := []byte(`{"system":{"set_relay_state":{"state":1}}}`)
	got, err := io.ReadAll(newDecrypter(bytes.NewReader(in)))
	if err != nil {
		t.Fatalf("io.ReadAll(decryptReader) error: %v", err)
	}
	if !bytes.Equal(got, want) {
		t.Errorf("io.ReadAll(decryptReader) = %q, want %q", got, want)
	}
}

func TestEncrypt(t *testing.T) {
	// on message from hs100.sh
	want64 := "AAAAKtDygfiL/5r31e+UtsWg1Iv5nPCR6LfEsNGlwOLYo4HyhueT9tTu36Lfog=="
	want, err := base64.StdEncoding.DecodeString(want64)
	if err != nil {
		t.Fatalf("base64.DecodeString(%q) error: %v", want64, err)
	}
	want = want[4:]
	in := []byte(`{"system":{"set_relay_state":{"state":1}}}`)
	var buf bytes.Buffer
	if _, err := newEncrypter(&buf).Write(in); err != nil {
		t.Fatalf("newEncrypter(buf).Write(in) error = %v", err)
	}

	if got := buf.Bytes(); !bytes.Equal(got, want) {
		t.Errorf("buf.Bytes() = %02x, want %02x", got, want)
	}
}

func TestEncryptDecrypt(t *testing.T) {
	want := make([]byte, 64)
	if _, err := rand.Read(want); err != nil {
		t.Fatalf("rand.Read(want) error: %v", err)
	}

	var buf bytes.Buffer
	newEncrypter(&buf).Write(want)
	got, err := io.ReadAll(newDecrypter(&buf))
	if err != nil {
		t.Fatalf("io.ReadAll(newDecrypter(&buf))")
	}
	if !bytes.Equal(got, want) {
		t.Errorf("decrypt(encrypt(%02x)) = %02x, want %02x", want, got, want)
	}
}

func TestReadStatusFromRealPlug(t *testing.T) {
	//t.Skip("Hits the real device")

	p := Plug{Addr: "192.168.86.10:9999"}

	resp, err := p.roundTrip(reqGetSysinfo)
	if err != nil {
		t.Errorf("Plug.roundTrip(%v) error = %v", reqGetSysinfo, err)
	}
	t.Logf("Plug.roundTrip(%v) = %#v", reqGetSysinfo, *resp.System.GetSysInfo)
}