/*
Real-time Online/Offline Charging System (OCS) for Telecom & ISP environments
Copyright (C) ITsysCOM GmbH

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 sessions

import (
	"testing"
	"time"

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

//Test1 ExtraDuration 0 and LastUsage < initial
func TestSRunDebitReserve(t *testing.T) {
	lastUsage := time.Duration(1*time.Minute + 30*time.Second)
	duration := time.Duration(2 * time.Minute)
	sr := &SRun{
		ExtraDuration: time.Duration(0),
		LastUsage:     duration,
		TotalUsage:    duration,
	}
	if rDur := sr.debitReserve(duration, &lastUsage); rDur != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, rDur)
	}
	//start with extraDuration 0 and the difference go in rDur
	if sr.ExtraDuration != time.Duration(0) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(0), sr.ExtraDuration)
	}
	if sr.LastUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.LastUsage)
	}
	if sr.TotalUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.TotalUsage)
	}
}

//Test2 ExtraDuration 0 and LastUsage > initial
func TestSRunDebitReserve2(t *testing.T) {
	lastUsage := time.Duration(2*time.Minute + 30*time.Second)
	duration := time.Duration(2 * time.Minute)
	sr := &SRun{
		ExtraDuration: time.Duration(0),
		LastUsage:     duration,
		TotalUsage:    duration,
	}
	if rDur := sr.debitReserve(duration, &lastUsage); rDur != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, rDur)
	}
	if sr.ExtraDuration != time.Duration(0) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(0), sr.ExtraDuration)
	}
	if sr.LastUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.LastUsage)
	}
	if sr.TotalUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.TotalUsage)
	}
}

//Test3 ExtraDuration ( 1m < duration) and LastUsage < initial
func TestSRunDebitReserve3(t *testing.T) {
	lastUsage := time.Duration(1*time.Minute + 30*time.Second)
	duration := time.Duration(2 * time.Minute)
	sr := &SRun{
		ExtraDuration: time.Duration(time.Minute),
		LastUsage:     duration,
		TotalUsage:    duration,
	}
	if rDur := sr.debitReserve(duration, &lastUsage); rDur != (duration - lastUsage) {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, rDur)
	}
	if sr.ExtraDuration != time.Duration(0) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(0), sr.ExtraDuration)
	}
	if sr.LastUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.LastUsage)
	}
	if sr.TotalUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.TotalUsage)
	}
}

//Test4 ExtraDuration 1m and LastUsage > initial
func TestSRunDebitReserve4(t *testing.T) {
	lastUsage := time.Duration(2*time.Minute + 30*time.Second)
	duration := time.Duration(2 * time.Minute)
	sr := &SRun{
		ExtraDuration: time.Duration(time.Minute),
		LastUsage:     duration,
		TotalUsage:    duration,
	}
	//We have extraDuration 1 minute and 30s different
	if rDur := sr.debitReserve(duration, &lastUsage); rDur != time.Duration(1*time.Minute+30*time.Second) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(1*time.Minute+30*time.Second), rDur)
	}
	if sr.ExtraDuration != time.Duration(0) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(0), sr.ExtraDuration)
	}
	if sr.LastUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.LastUsage)
	}
	if sr.TotalUsage != lastUsage {
		t.Errorf("Expecting: %+v, received: %+v", lastUsage, sr.TotalUsage)
	}
}

//Test5 ExtraDuration 3m ( > initialDuration) and LastUsage < initial
func TestSRunDebitReserve5(t *testing.T) {
	lastUsage := time.Duration(1*time.Minute + 30*time.Second)
	duration := time.Duration(2 * time.Minute)
	sr := &SRun{
		ExtraDuration: time.Duration(3 * time.Minute),
		LastUsage:     duration,
		TotalUsage:    duration,
	}
	//in debit reserve we start with an extraDuration 3m
	//after we add the different dur-lastUsed (+30s)
	if rDur := sr.debitReserve(duration, &lastUsage); rDur != time.Duration(0) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(0), rDur)
	}
	//ExtraDuration (3m30s - 2m)
	if sr.ExtraDuration != time.Duration(1*time.Minute+30*time.Second) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(1*time.Minute+30*time.Second), sr.ExtraDuration)
	}
	if sr.LastUsage != duration {
		t.Errorf("Expecting: %+v, received: %+v", duration, sr.LastUsage)
	}
	if sr.TotalUsage != time.Duration(3*time.Minute+30*time.Second) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(3*time.Minute+30*time.Second), sr.TotalUsage)
	}
}

//Test6 ExtraDuration 3m ( > initialDuration) and LastUsage > initial
func TestSRunDebitReserve6(t *testing.T) {
	lastUsage := time.Duration(2*time.Minute + 30*time.Second)
	duration := time.Duration(2 * time.Minute)
	sr := &SRun{
		ExtraDuration: time.Duration(3 * time.Minute),
		LastUsage:     duration,
		TotalUsage:    duration,
	}
	//in debit reserve we start with an extraDuration 3m
	//after we add the different dur-lastUsed (-30s)
	if rDur := sr.debitReserve(duration, &lastUsage); rDur != time.Duration(0) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(0), rDur)
	}
	//ExtraDuration (2m30s - 2m)
	if sr.ExtraDuration != time.Duration(30*time.Second) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(30*time.Second), sr.ExtraDuration)
	}
	if sr.LastUsage != duration {
		t.Errorf("Expecting: %+v, received: %+v", duration, sr.LastUsage)
	}
	// 2m(initial Total) + 2m30s(correction)
	if sr.TotalUsage != time.Duration(4*time.Minute+30*time.Second) {
		t.Errorf("Expecting: %+v, received: %+v", time.Duration(4*time.Minute+30*time.Second), sr.TotalUsage)
	}
}

func TestSessionAsCGREventsRawEvent(t *testing.T) {
	ev := map[string]interface{}{
		utils.EVENT_NAME:  "TEST_EVENT",
		utils.ToR:         utils.VOICE,
		utils.OriginID:    "123451",
		utils.Account:     "1001",
		utils.Subject:     "1001",
		utils.Destination: "1004",
		utils.Category:    "call",
		utils.Tenant:      "cgrates.org",
		utils.RequestType: utils.META_PREPAID,
		utils.SetupTime:   time.Date(2016, time.January, 5, 18, 30, 59, 0, time.UTC),
		utils.AnswerTime:  time.Date(2016, time.January, 5, 18, 31, 05, 0, time.UTC),
		utils.Usage:       time.Duration(2 * time.Second),
		utils.Cost:        12.12,
	}
	s := &Session{
		CGRID:      "RandomCGRID",
		Tenant:     "cgrates.org",
		EventStart: engine.NewSafEvent(ev),
	}
	if cgrEvs, _ := s.asCGREvents(); len(cgrEvs) != 1 {
		t.Errorf("Expecting: 1, received: %+v", len(cgrEvs))
	} else if cgrEvs[0].Event[utils.RunID] != utils.MetaRaw {
		t.Errorf("Expecting: %+v, received: %+v", utils.MetaRaw, cgrEvs[0].Event[utils.RunID])
	} else if cgrEvs[0].Event[utils.Cost] != 12.12 {
		t.Errorf("Expecting: %+v, received: %+v", 12.12, cgrEvs[0].Event[utils.Cost])
	}

}

func TestSessionAsCGREvents(t *testing.T) {
	startEv := map[string]interface{}{
		utils.EVENT_NAME:  "TEST_EVENT",
		utils.ToR:         utils.VOICE,
		utils.OriginID:    "123451",
		utils.Account:     "1001",
		utils.Subject:     "1001",
		utils.Destination: "1004",
		utils.Category:    "call",
		utils.Tenant:      "cgrates.org",
		utils.RequestType: utils.META_PREPAID,
		utils.SetupTime:   time.Date(2016, time.January, 5, 18, 30, 59, 0, time.UTC),
		utils.AnswerTime:  time.Date(2016, time.January, 5, 18, 31, 05, 0, time.UTC),
		utils.Usage:       time.Duration(2 * time.Second),
		utils.Cost:        12.12,
	}
	ev := map[string]interface{}{
		utils.EVENT_NAME:  "TEST_EVENT2",
		utils.ToR:         utils.VOICE,
		utils.OriginID:    "123451",
		utils.Account:     "1001",
		utils.Subject:     "1001",
		utils.Destination: "1004",
		utils.Category:    "call",
		utils.RunID:       utils.MetaDefault,
		utils.Tenant:      "cgrates.org",
		utils.RequestType: utils.META_PREPAID,
		utils.SetupTime:   time.Date(2016, time.January, 5, 18, 30, 59, 0, time.UTC),
		utils.AnswerTime:  time.Date(2016, time.January, 5, 18, 31, 05, 0, time.UTC),
		utils.Usage:       time.Duration(2 * time.Second),
		utils.Cost:        12.13,
	}
	s := &Session{
		CGRID:      "RandomCGRID",
		Tenant:     "cgrates.org",
		EventStart: engine.NewSafEvent(startEv),
		SRuns: []*SRun{
			&SRun{
				Event:      engine.NewMapEvent(ev),
				TotalUsage: time.Duration(2 * time.Second),
			},
		},
	}
	//check for some fields if populated correct
	cgrEvs, err := s.asCGREvents()
	if err != nil {
		t.Error(err)
	} else if len(cgrEvs) != 2 {
		t.Errorf("Expecting: 2, received: %+v", len(cgrEvs))
	}
	if cgrEvs[0].Event[utils.RunID] != utils.MetaRaw {
		t.Errorf("Expecting: %+v, received: %+v", utils.MetaRaw, cgrEvs[0].Event[utils.RunID])
	} else if cgrEvs[0].Event[utils.Cost] != 12.12 {
		t.Errorf("Expecting: %+v, received: %+v", 12.12, cgrEvs[0].Event[utils.Cost])
	}
	if cgrEvs[1].Event[utils.RunID] != utils.MetaDefault {
		t.Errorf("Expecting: %+v, received: %+v", utils.MetaRaw, cgrEvs[1].Event[utils.RunID])
	} else if cgrEvs[1].Event[utils.Cost] != 12.13 {
		t.Errorf("Expecting: %+v, received: %+v", 12.13, cgrEvs[1].Event[utils.Cost])
	}
}