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

This program is free software: you can Storagetribute 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 WITH*out 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 engine

import (
	"strings"
	"time"

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

func NewCdrStatsFromCdrStatsCfg(csCfg *config.CdrStatsConfig) *CdrStats {
	return &CdrStats{
		Id:                csCfg.Id,
		QueueLength:       csCfg.QueueLength,
		TimeWindow:        csCfg.TimeWindow,
		Metrics:           csCfg.Metrics,
		SetupInterval:     csCfg.SetupInterval,
		TOR:               csCfg.TORs,
		CdrHost:           csCfg.CdrHosts,
		CdrSource:         csCfg.CdrSources,
		ReqType:           csCfg.ReqTypes,
		Direction:         csCfg.Directions,
		Tenant:            csCfg.Tenants,
		Category:          csCfg.Categories,
		Account:           csCfg.Accounts,
		Subject:           csCfg.Subjects,
		DestinationPrefix: csCfg.DestinationPrefixes,
		UsageInterval:     csCfg.UsageInterval,
		Supplier:          csCfg.Suppliers,
		DisconnectCause:   csCfg.DisconnectCauses,
		MediationRunIds:   csCfg.MediationRunIds,
		RatedAccount:      csCfg.RatedAccounts,
		RatedSubject:      csCfg.RatedSubjects,
		CostInterval:      csCfg.CostInterval,
	}
}

type CdrStats struct {
	Id                string          // Config id, unique per config instance
	QueueLength       int             // Number of items in the stats buffer
	TimeWindow        time.Duration   // Will only keep the CDRs who's call setup time is not older than time.Now()-TimeWindow
	Metrics           []string        // ASR, ACD, ACC
	SetupInterval     []time.Time     // CDRFieldFilter on SetupInterval, 2 or less items (>= start interval,< stop_interval)
	TOR               []string        // CDRFieldFilter on TORs
	CdrHost           []string        // CDRFieldFilter on CdrHosts
	CdrSource         []string        // CDRFieldFilter on CdrSources
	ReqType           []string        // CDRFieldFilter on ReqTypes
	Direction         []string        // CDRFieldFilter on Directions
	Tenant            []string        // CDRFieldFilter on Tenants
	Category          []string        // CDRFieldFilter on Categories
	Account           []string        // CDRFieldFilter on Accounts
	Subject           []string        // CDRFieldFilter on Subjects
	DestinationPrefix []string        // CDRFieldFilter on DestinationPrefixes
	UsageInterval     []time.Duration // CDRFieldFilter on UsageInterval, 2 or less items (>= Usage, <Usage)
	PddInterval       []time.Duration // CDRFieldFilter on PddInterval, 2 or less items (>= Pdd, <Pdd)
	Supplier          []string        // CDRFieldFilter on Suppliers
	DisconnectCause   []string        // Filter on DisconnectCause
	MediationRunIds   []string        // CDRFieldFilter on MediationRunIds
	RatedAccount      []string        // CDRFieldFilter on RatedAccounts
	RatedSubject      []string        // CDRFieldFilter on RatedSubjects
	CostInterval      []float64       // CDRFieldFilter on CostInterval, 2 or less items, (>=Cost, <Cost)
	Triggers          ActionTriggerPriotityList
}

func (cs *CdrStats) AcceptCdr(cdr *StoredCdr) bool {
	if cdr == nil {
		return false
	}
	if len(cs.SetupInterval) > 0 {
		if cdr.SetupTime.Before(cs.SetupInterval[0]) {
			return false
		}
		if len(cs.SetupInterval) > 1 && (cdr.SetupTime.Equal(cs.SetupInterval[1]) || cdr.SetupTime.After(cs.SetupInterval[1])) {
			return false
		}
	}
	if len(cs.TOR) > 0 && !utils.IsSliceMember(cs.TOR, cdr.TOR) {
		return false
	}
	if len(cs.CdrHost) > 0 && !utils.IsSliceMember(cs.CdrHost, cdr.CdrHost) {
		return false
	}
	if len(cs.CdrSource) > 0 && !utils.IsSliceMember(cs.CdrSource, cdr.CdrSource) {
		return false
	}
	if len(cs.ReqType) > 0 && !utils.IsSliceMember(cs.ReqType, cdr.ReqType) {
		return false
	}
	if len(cs.Direction) > 0 && !utils.IsSliceMember(cs.Direction, cdr.Direction) {
		return false
	}
	if len(cs.Tenant) > 0 && !utils.IsSliceMember(cs.Tenant, cdr.Tenant) {
		return false
	}
	if len(cs.Category) > 0 && !utils.IsSliceMember(cs.Category, cdr.Category) {
		return false
	}
	if len(cs.Account) > 0 && !utils.IsSliceMember(cs.Account, cdr.Account) {
		return false
	}
	if len(cs.Subject) > 0 && !utils.IsSliceMember(cs.Subject, cdr.Subject) {
		return false
	}
	if len(cs.DestinationPrefix) > 0 {
		found := false
		for _, prefix := range cs.DestinationPrefix {
			if strings.HasPrefix(cdr.Destination, prefix) {
				found = true
				break
			}
		}
		if !found {
			return false
		}
	}
	if len(cs.UsageInterval) > 0 {
		if cdr.Usage < cs.UsageInterval[0] {
			return false
		}
		if len(cs.UsageInterval) > 1 && cdr.Usage >= cs.UsageInterval[1] {
			return false
		}
	}
	if len(cs.PddInterval) > 0 {
		if cdr.Pdd < cs.PddInterval[0] {
			return false
		}
		if len(cs.PddInterval) > 1 && cdr.Pdd >= cs.PddInterval[1] {
			return false
		}
	}
	if len(cs.Supplier) > 0 && !utils.IsSliceMember(cs.Supplier, cdr.Supplier) {
		return false
	}
	if len(cs.DisconnectCause) > 0 && !utils.IsSliceMember(cs.DisconnectCause, cdr.DisconnectCause) {
		return false
	}
	if len(cs.MediationRunIds) > 0 && !utils.IsSliceMember(cs.MediationRunIds, cdr.MediationRunId) {
		return false
	}
	if len(cs.CostInterval) > 0 {
		if cdr.Cost < cs.CostInterval[0] {
			return false
		}
		if len(cs.CostInterval) > 1 && cdr.Cost >= cs.CostInterval[1] {
			return false
		}
	}
	if len(cs.RatedAccount) > 0 && !utils.IsSliceMember(cs.RatedAccount, cdr.RatedAccount) {
		return false
	}
	if len(cs.RatedSubject) > 0 && !utils.IsSliceMember(cs.RatedSubject, cdr.RatedSubject) {
		return false
	}
	return true
}