/*
Rating system designed to be used in VoIP Carriers World
Copyright (C) 2013 ITsysCOM

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>
*/

package config

import (
	"code.google.com/p/goconf/conf"
	"errors"
	"strings"

	"github.com/cgrates/cgrates/utils"
)

// Adds support for slice values in config
func ConfigSlice(c *conf.ConfigFile, section, valName string) ([]string, error) {
	sliceStr, errGet := c.GetString(section, valName)
	if errGet != nil {
		return nil, errGet
	}
	cfgValStrs := strings.Split(sliceStr, ",")       // If need arrises, we can make the separator configurable
	if len(cfgValStrs) == 1 && cfgValStrs[0] == "" { // Prevents returning iterable with empty value
		return []string{}, nil
	}
	for _, elm := range cfgValStrs {
		if elm == "" { //One empty element is presented when splitting empty string
			return nil, errors.New("Empty values in config slice")

		}
	}
	return cfgValStrs, nil
}

func ParseRSRFields(configVal string) ([]*utils.RSRField, error) {
	cfgValStrs := strings.Split(configVal, string(utils.CSV_SEP))
	if len(cfgValStrs) == 1 && cfgValStrs[0] == "" { // Prevents returning iterable with empty value
		return []*utils.RSRField{}, nil
	}
	rsrFields := make([]*utils.RSRField, len(cfgValStrs))
	for idx, cfgValStr := range cfgValStrs {
		if len(cfgValStr) == 0 { //One empty element is presented when splitting empty string
			return nil, errors.New("Empty values in config slice")

		}
		if rsrField, err := utils.NewRSRField(cfgValStr); err != nil {
			return nil, err
		} else {
			rsrFields[idx] = rsrField
		}
	}
	return rsrFields, nil
}