package api

import (
	"strings"

	"fmt"

	"github.com/ethereum/go-ethereum/eth"
	"github.com/ethereum/go-ethereum/rpc/codec"
	"github.com/ethereum/go-ethereum/xeth"
)

const (
	EthApiName = "eth"
)

// Parse a comma separated API string to individual api's
func ParseApiString(apistr string, codec codec.Codec, xeth *xeth.XEth, eth *eth.Ethereum) ([]EthereumApi, error) {
	if len(strings.TrimSpace(apistr)) == 0 {
		return nil, fmt.Errorf("Empty apistr provided")
	}

	names := strings.Split(apistr, ",")
	apis := make([]EthereumApi, len(names))

	for i, name := range names {
		switch strings.ToLower(strings.TrimSpace(name)) {
		case EthApiName:
			apis[i] = NewEthApi(xeth, codec)
		default:
			return nil, fmt.Errorf("Unknown API '%s'", name)
		}
	}

	return apis, nil
}