/*
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 Affero 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 Affero General Public License for more details.

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

package config

import (
	"slices"
	"time"

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

type DiameterListener struct {
	Network string // sctp or tcp
	Address string // address where to listen for diameter requests <x.y.z.y:1234>
}

// DiameterAgentCfg the config section that describes the Diameter Agent
type DiameterAgentCfg struct {
	Enabled                 bool // enables the diameter agent: <true|false>
	Listeners               []DiameterListener
	DictionariesPath        string
	CeApplications          []string
	SessionSConns           []string
	StatSConns              []string
	ThresholdSConns         []string
	OriginHost              string
	OriginRealm             string
	VendorID                int
	ProductName             string
	SyncedConnReqs          bool
	ASRTemplate             string
	RARTemplate             string
	ForcedDisconnect        string
	ConnStatusStatQueueIDs  []string
	ConnStatusThresholdIDs  []string
	ConnHealthCheckInterval time.Duration // peer connection health check interval (0 to disable)
	RequestProcessors       []*RequestProcessor
}

func (da *DiameterAgentCfg) loadFromJSONCfg(jc *DiameterAgentJsonCfg, separator string) (err error) {
	if jc == nil {
		return nil
	}
	if jc.Enabled != nil {
		da.Enabled = *jc.Enabled
	}
	if jc.Listeners != nil {
		da.Listeners = make([]DiameterListener, 0, len(*jc.Listeners))
		for _, listnr := range *jc.Listeners {
			var ls DiameterListener
			if listnr.Address != nil {
				ls.Address = *listnr.Address
			}
			if listnr.Network != nil {
				ls.Network = *listnr.Network
			}
			da.Listeners = append(da.Listeners, ls)
		}
	}
	if jc.DictionariesPath != nil {
		da.DictionariesPath = *jc.DictionariesPath
	}
	if jc.CeApplications != nil {
		da.CeApplications = make([]string, len(*jc.CeApplications))
		copy(da.CeApplications, *jc.CeApplications)
	}
	if jc.SessionSConns != nil {
		da.SessionSConns = make([]string, len(*jc.SessionSConns))
		for idx, attrConn := range *jc.SessionSConns {
			// if we have the connection internal we change the name so we can have internal rpc for each subsystem
			da.SessionSConns[idx] = attrConn
			if attrConn == utils.MetaInternal ||
				attrConn == rpcclient.BiRPCInternal {
				da.SessionSConns[idx] = utils.ConcatenatedKey(attrConn, utils.MetaSessionS)
			}
		}
	}
	if jc.StatSConns != nil {
		da.StatSConns = tagInternalConns(*jc.StatSConns, utils.MetaStats)
	}
	if jc.ThresholdSConns != nil {
		da.ThresholdSConns = tagInternalConns(*jc.ThresholdSConns, utils.MetaThresholds)
	}
	if jc.OriginHost != nil {
		da.OriginHost = *jc.OriginHost
	}
	if jc.OriginRealm != nil {
		da.OriginRealm = *jc.OriginRealm
	}
	if jc.VendorID != nil {
		da.VendorID = *jc.VendorID
	}
	if jc.ProductName != nil {
		da.ProductName = *jc.ProductName
	}
	if jc.SyncedConnRequests != nil {
		da.SyncedConnReqs = *jc.SyncedConnRequests
	}
	if jc.ASRTemplate != nil {
		da.ASRTemplate = *jc.ASRTemplate
	}
	if jc.RARTemplate != nil {
		da.RARTemplate = *jc.RARTemplate
	}
	if jc.ForcedDisconnect != nil {
		da.ForcedDisconnect = *jc.ForcedDisconnect
	}
	if jc.StatQueueIDs != nil {
		da.ConnStatusStatQueueIDs = *jc.StatQueueIDs
	}
	if jc.ThresholdIDs != nil {
		da.ConnStatusThresholdIDs = *jc.ThresholdIDs
	}
	if jc.ConnHealthCheckInterval != nil {
		da.ConnHealthCheckInterval, err = utils.ParseDurationWithNanosecs(*jc.ConnHealthCheckInterval)
		if err != nil {
			return
		}
	}
	if jc.RequestProcessors != nil {
		for _, reqProcJsn := range *jc.RequestProcessors {
			rp := new(RequestProcessor)
			var haveID bool
			for _, rpSet := range da.RequestProcessors {
				if reqProcJsn.ID != nil && rpSet.ID == *reqProcJsn.ID {
					rp = rpSet // Will load data into the one set
					haveID = true
					break
				}
			}
			if err = rp.loadFromJSONCfg(reqProcJsn, separator); err != nil {
				return
			}
			if !haveID {
				da.RequestProcessors = append(da.RequestProcessors, rp)
			}
		}
	}
	return
}

// AsMapInterface returns the config as a map[string]any
func (lstn *DiameterListener) AsMapInterface() map[string]any {
	return map[string]any{
		utils.NetworkCfg: lstn.Network,
		utils.AddressCfg: lstn.Address,
	}

}

// AsMapInterface returns the config as a map[string]any
func (da *DiameterAgentCfg) AsMapInterface(separator string) map[string]any {
	listeners := make([]map[string]any, len(da.Listeners))
	for i, item := range da.Listeners {
		listeners[i] = item.AsMapInterface()
	}
	m := map[string]any{
		utils.EnabledCfg:                 da.Enabled,
		utils.ListenersCfg:               listeners,
		utils.DictionariesPathCfg:        da.DictionariesPath,
		utils.OriginHostCfg:              da.OriginHost,
		utils.OriginRealmCfg:             da.OriginRealm,
		utils.VendorIDCfg:                da.VendorID,
		utils.ProductNameCfg:             da.ProductName,
		utils.SyncedConnReqsCfg:          da.SyncedConnReqs,
		utils.ASRTemplateCfg:             da.ASRTemplate,
		utils.RARTemplateCfg:             da.RARTemplate,
		utils.ForcedDisconnectCfg:        da.ForcedDisconnect,
		utils.ConnHealthCheckIntervalCfg: da.ConnHealthCheckInterval.String(),
		utils.StatSConnsCfg:              stripInternalConns(da.StatSConns),
		utils.ThresholdSConnsCfg:         stripInternalConns(da.ThresholdSConns),
		utils.ConnStatusStatQueueIDsCfg:  da.ConnStatusStatQueueIDs,
		utils.ConnStatusThresholdIDsCfg:  da.ConnStatusThresholdIDs,
	}

	if da.CeApplications != nil {
		apps := make([]string, len(da.CeApplications))
		copy(apps, da.CeApplications)
		m[utils.CeApplicationsCfg] = apps
	}

	requestProcessors := make([]map[string]any, len(da.RequestProcessors))
	for i, item := range da.RequestProcessors {
		requestProcessors[i] = item.AsMapInterface(separator)
	}
	m[utils.RequestProcessorsCfg] = requestProcessors

	if da.SessionSConns != nil {
		sessionSConns := make([]string, len(da.SessionSConns))
		for i, item := range da.SessionSConns {
			sessionSConns[i] = item
			if item == utils.ConcatenatedKey(utils.MetaInternal, utils.MetaSessionS) {
				sessionSConns[i] = utils.MetaInternal
			} else if item == utils.ConcatenatedKey(rpcclient.BiRPCInternal, utils.MetaSessionS) {
				sessionSConns[i] = rpcclient.BiRPCInternal
			}
		}
		m[utils.SessionSConnsCfg] = sessionSConns
	}
	return m
}

// Clone returns a deep copy of DiameterAgentCfg
func (da DiameterAgentCfg) Clone() *DiameterAgentCfg {
	clone := &DiameterAgentCfg{
		Enabled:                 da.Enabled,
		Listeners:               slices.Clone(da.Listeners),
		DictionariesPath:        da.DictionariesPath,
		CeApplications:          slices.Clone(da.CeApplications),
		SessionSConns:           slices.Clone(da.SessionSConns),
		StatSConns:              slices.Clone(da.StatSConns),
		ThresholdSConns:         slices.Clone(da.ThresholdSConns),
		OriginHost:              da.OriginHost,
		OriginRealm:             da.OriginRealm,
		VendorID:                da.VendorID,
		ProductName:             da.ProductName,
		SyncedConnReqs:          da.SyncedConnReqs,
		ASRTemplate:             da.ASRTemplate,
		RARTemplate:             da.RARTemplate,
		ForcedDisconnect:        da.ForcedDisconnect,
		ConnStatusStatQueueIDs:  slices.Clone(da.ConnStatusStatQueueIDs),
		ConnStatusThresholdIDs:  slices.Clone(da.ConnStatusThresholdIDs),
		ConnHealthCheckInterval: da.ConnHealthCheckInterval,
	}
	if da.RequestProcessors != nil {
		clone.RequestProcessors = make([]*RequestProcessor, len(da.RequestProcessors))
		for i, req := range da.RequestProcessors {
			clone.RequestProcessors[i] = req.Clone()
		}
	}
	return clone
}