package amf

import (
	"math"
	"encoding/binary"
	"errors"
)

func Encode(amf_root_obj AMFObj, msg_ptr *Message) (error) {
	tmp_buffer := make([]byte, 1024)
	bytes_encoded := 0

	for i := 0; i < len(amf_root_obj); i++ {
		if err := encode_next(amf_root_obj[i], &tmp_buffer, &bytes_encoded); err != nil {
			return err
		}
	}
	msg_ptr.msg_len = bytes_encoded
	msg_ptr.data = tmp_buffer[:bytes_encoded]
	return nil
}

func encode_number(num_to_enc float64, tmp_buffer *[]byte, bytes_encoded *int) {
	(*tmp_buffer)[*bytes_encoded] = 0
	binary.BigEndian.PutUint64((*tmp_buffer)[*bytes_encoded + 1:*bytes_encoded + 9], math.Float64bits(num_to_enc))
	*bytes_encoded += 9
}

func encode_next(amf_obj interface{}, tmp_buffer *[]byte, bytes_encoded *int) (error) {
	switch amf_obj.(type) {
	case float64:
		encode_number(amf_obj.(float64), tmp_buffer, bytes_encoded)
	default:
		return errors.New("Type not implemented")
	}
	return nil
}