/*
Rating system designed to be used in VoIP Carriers World
Copyright (C) 2012  Radu Ioan Fericean

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 sessionmanager

import (
	"fmt"
	"github.com/cgrates/cgrates/timespans"
	"regexp"
	"time"
)

// Event type holding a mapping of all event's proprieties
type FSEvent struct {
	Fields map[string]string
}

var (
	eventBodyRE = regexp.MustCompile(`"(.*?)":\s+"(.*?)"`) // for parsing the proprieties
)

const (
	// Freswitch event proprities names
	DIRECTION   = "Call-Direction"
	ORIG_ID     = "variable_sip_call_id" //- originator_id - match cdrs
	SUBJECT     = "variable_cgr_subject"
	ACCOUNT     = "variable_cgr_account"
	DESTINATION = "variable_cgr_destination"
	TOR         = "variable_cgr_tor"
	UUID        = "Unique-ID" // -Unique ID for this call leg
	CSTMID      = "variable_cgr_cstmid"
	START_TIME  = "Event-Date-GMT"
	NAME        = "Event-Name"
	HEARTBEAT   = "HEARTBEAT"
	ANSWER      = "CHANNEL_ANSWER"
	HANGUP      = "CHANNEL_HANGUP_COMPLETE"
)

// Nice printing for the event object.
func (fsev *FSEvent) String() (result string) {
	for k, v := range fsev.Fields {
		result += fmt.Sprintf("%s = %s\n", k, v)
	}
	result += "=============================================================="
	return
}

// Loads the new event data from a body of text containing the key value proprieties.
// It stores the parsed proprieties in the internal map.
func (fsev *FSEvent) New(body string) Event {
	fsev.Fields = make(map[string]string)
	for _, fields := range eventBodyRE.FindAllStringSubmatch(body, -1) {
		if len(fields) == 3 {
			fsev.Fields[fields[1]] = fields[2]
		} else {
			timespans.Logger.Err(fmt.Sprintf("malformed event field: %v", fields))
		}
	}
	return fsev
}

func (fsev *FSEvent) GetName() string {
	return fsev.Fields[NAME]
}
func (fsev *FSEvent) GetDirection() string {
	//TODO: temporary hack
	return "OUT"
	//return fsev.Fields[DIRECTION]
}
func (fsev *FSEvent) GetOrigId() string {
	return fsev.Fields[ORIG_ID]
}
func (fsev *FSEvent) GetSubject() string {
	return fsev.Fields[SUBJECT]
}
func (fsev *FSEvent) GetAccount() string {
	return fsev.Fields[ACCOUNT]
}
func (fsev *FSEvent) GetDestination() string {
	return fsev.Fields[DESTINATION]
}
func (fsev *FSEvent) GetTOR() string {
	return fsev.Fields[TOR]
}
func (fsev *FSEvent) GetUUID() string {
	return fsev.Fields[UUID]
}
func (fsev *FSEvent) GetTenant() string {
	return fsev.Fields[CSTMID]
}
func (fsev *FSEvent) GetStartTime() (t time.Time, err error) {
	t, err = time.Parse(time.RFC1123, fsev.Fields[START_TIME])
	return
}