package envelope

import "strings"

func IsRealtimeTelemetryFrame(env FrameEnvelope) bool {
	if env.ParseStatus == ParseBadFrame {
		return false
	}
	switch env.Protocol {
	case ProtocolGB32960:
		command := strings.TrimSpace(env.MessageID)
		if command == "" && env.Parsed != nil {
			if header, ok := env.Parsed["header"].(map[string]any); ok {
				command = strings.TrimSpace(stringAny(header["command"]))
			}
		}
		if strings.EqualFold(command, "0x02") || strings.EqualFold(command, "0x03") {
			return true
		}
		_, hasDataUnits := env.Parsed["data_units"]
		return hasDataUnits || hasRealtimeField(env)
	case ProtocolJT808:
		if strings.EqualFold(strings.TrimSpace(env.MessageID), "0x0200") {
			return true
		}
		if _, ok := env.Parsed["location"]; ok {
			return true
		}
		return hasRealtimeField(env)
	case ProtocolYutongMQTT:
		data, ok := env.Parsed["data"].(map[string]any)
		return ok && len(data) > 0
	default:
		return false
	}
}

func hasRealtimeField(env FrameEnvelope) bool {
	return env.Fields[FieldLatitude] != nil ||
		env.Fields[FieldLongitude] != nil ||
		env.Fields[FieldTotalMileageKM] != nil ||
		env.Fields[FieldSpeedKMH] != nil ||
		env.Fields[FieldSOCPercent] != nil
}

func stringAny(value any) string {
	if text, ok := value.(string); ok {
		return text
	}
	return ""
}