package envelope

import (
	"encoding/json"
	"testing"
)

func TestFrameEnvelopeVehicleKeyPrefersVIN(t *testing.T) {
	e := FrameEnvelope{Protocol: ProtocolJT808, VIN: "LNBVIN00000000001", Phone: "013307795425"}
	if got := e.VehicleKey(); got != "LNBVIN00000000001" {
		t.Fatalf("VehicleKey() = %q", got)
	}
}

func TestFrameEnvelopeVehicleKeyFallsBackToPhone(t *testing.T) {
	e := FrameEnvelope{Protocol: ProtocolJT808, Phone: "013307795425"}
	if got := e.VehicleKey(); got != "JT808:013307795425" {
		t.Fatalf("VehicleKey() = %q", got)
	}
}

func TestFrameEnvelopeEventIDStable(t *testing.T) {
	e := FrameEnvelope{
		Protocol:     ProtocolJT808,
		MessageID:    "0x0200",
		Phone:        "013307795425",
		Sequence:     1,
		EventTimeMS:  1782745114000,
		ReceivedAtMS: 1782745114999,
		RawHex:       "7e02000000ff7e",
	}
	a := e.StableEventID()
	b := e.StableEventID()
	if a == "" || a != b {
		t.Fatalf("event id must be non-empty and stable: %q %q", a, b)
	}
}

func TestFrameEnvelopeMarshalDefaults(t *testing.T) {
	e := FrameEnvelope{Protocol: ProtocolGB32960, VIN: "LNBVIN00000000002", MessageID: "0x02"}
	payload, err := e.MarshalJSONBytes()
	if err != nil {
		t.Fatalf("MarshalJSONBytes() error = %v", err)
	}
	var decoded FrameEnvelope
	if err := json.Unmarshal(payload, &decoded); err != nil {
		t.Fatalf("json.Unmarshal() error = %v", err)
	}
	if decoded.EventID == "" {
		t.Fatal("event id should be filled")
	}
	if decoded.ParseStatus != ParseOK {
		t.Fatalf("parse status = %q", decoded.ParseStatus)
	}
}