/*
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 (
	"fmt"
	"strconv"
	"strings"
	"time"

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

type DataDBOpts struct {
	InternalDBDumpPath        string        // Path to the dump file
	InternalDBBackupPath      string        // Path where db dump will backup
	InternalDBStartTimeout    time.Duration // Transcache recover from dump files timeout duration
	InternalDBDumpInterval    time.Duration // Regurarly dump database to file
	InternalDBRewriteInterval time.Duration // Regurarly rewrite dump files
	InternalDBFileSizeLimit   int64         // maximum size that can be written in a singular dump file
	RedisMaxConns             int
	RedisConnectAttempts      int
	RedisSentinel             string
	RedisCluster              bool
	RedisClusterSync          time.Duration
	RedisClusterOndownDelay   time.Duration
	RedisConnectTimeout       time.Duration
	RedisReadTimeout          time.Duration
	RedisWriteTimeout         time.Duration
	RedisPoolPipelineWindow   time.Duration
	RedisPoolPipelineLimit    int
	RedisTLS                  bool
	RedisClientCertificate    string
	RedisClientKey            string
	RedisCACertificate        string
	MongoQueryTimeout         time.Duration
	MongoConnScheme           string
}

// DataDbCfg Database config
type DataDbCfg struct {
	Type         string
	Host         string   // The host to connect to. Values that start with / are for UNIX domain sockets.
	Port         string   // The port to bind to.
	Name         string   // The name of the database to connect to.
	User         string   // The user to sign in as.
	Password     string   // The user's password.
	RmtConns     []string // Remote DataDB  connIDs
	RmtConnID    string
	RplConns     []string // Replication connIDs
	RplFiltered  bool
	RplCache     string
	RplFailedDir string
	RplInterval  time.Duration
	Items        map[string]*ItemOpt
	Opts         *DataDBOpts
}

func (dbOpts *DataDBOpts) loadFromJSONCfg(jsnCfg *DBOptsJson) (err error) {
	if jsnCfg == nil {
		return
	}
	if jsnCfg.InternalDBDumpPath != nil {
		dbOpts.InternalDBDumpPath = *jsnCfg.InternalDBDumpPath
	}
	if jsnCfg.InternalDBBackupPath != nil {
		dbOpts.InternalDBBackupPath = *jsnCfg.InternalDBBackupPath
	}
	if jsnCfg.InternalDBStartTimeout != nil {
		if dbOpts.InternalDBStartTimeout, err = utils.ParseDurationWithNanosecs(*jsnCfg.InternalDBStartTimeout); err != nil {
			return err
		}
	}
	if jsnCfg.InternalDBDumpInterval != nil {
		if dbOpts.InternalDBDumpInterval, err = utils.ParseDurationWithNanosecs(*jsnCfg.InternalDBDumpInterval); err != nil {
			return err
		}
	}
	if jsnCfg.InternalDBRewriteInterval != nil {
		if dbOpts.InternalDBRewriteInterval, err = utils.ParseDurationWithNanosecs(*jsnCfg.InternalDBRewriteInterval); err != nil {
			return err
		}
	}
	if jsnCfg.InternalDBFileSizeLimit != nil {
		if dbOpts.InternalDBFileSizeLimit, err = utils.ParseBinarySize(*jsnCfg.InternalDBFileSizeLimit); err != nil {
			return err
		}
	}
	if jsnCfg.RedisMaxConns != nil {
		dbOpts.RedisMaxConns = *jsnCfg.RedisMaxConns
	}
	if jsnCfg.RedisConnectAttempts != nil {
		dbOpts.RedisConnectAttempts = *jsnCfg.RedisConnectAttempts
	}
	if jsnCfg.RedisSentinel != nil {
		dbOpts.RedisSentinel = *jsnCfg.RedisSentinel
	}
	if jsnCfg.RedisCluster != nil {
		dbOpts.RedisCluster = *jsnCfg.RedisCluster
	}
	if jsnCfg.RedisClusterSync != nil {
		if dbOpts.RedisClusterSync, err = utils.ParseDurationWithNanosecs(*jsnCfg.RedisClusterSync); err != nil {
			return
		}
	}
	if jsnCfg.RedisClusterOndownDelay != nil {
		if dbOpts.RedisClusterOndownDelay, err = utils.ParseDurationWithNanosecs(*jsnCfg.RedisClusterOndownDelay); err != nil {
			return
		}
	}
	if jsnCfg.RedisConnectTimeout != nil {
		if dbOpts.RedisConnectTimeout, err = utils.ParseDurationWithNanosecs(*jsnCfg.RedisConnectTimeout); err != nil {
			return
		}
	}
	if jsnCfg.RedisReadTimeout != nil {
		if dbOpts.RedisReadTimeout, err = utils.ParseDurationWithNanosecs(*jsnCfg.RedisReadTimeout); err != nil {
			return
		}
	}
	if jsnCfg.RedisWriteTimeout != nil {
		if dbOpts.RedisWriteTimeout, err = utils.ParseDurationWithNanosecs(*jsnCfg.RedisWriteTimeout); err != nil {
			return
		}
	}
	if jsnCfg.RedisPoolPipelineWindow != nil {
		if dbOpts.RedisPoolPipelineWindow, err = utils.ParseDurationWithNanosecs(*jsnCfg.RedisPoolPipelineWindow); err != nil {
			return
		}
	}
	if jsnCfg.RedisPoolPipelineLimit != nil {
		dbOpts.RedisPoolPipelineLimit = *jsnCfg.RedisPoolPipelineLimit
	}
	if jsnCfg.RedisTLS != nil {
		dbOpts.RedisTLS = *jsnCfg.RedisTLS
	}
	if jsnCfg.RedisClientCertificate != nil {
		dbOpts.RedisClientCertificate = *jsnCfg.RedisClientCertificate
	}
	if jsnCfg.RedisClientKey != nil {
		dbOpts.RedisClientKey = *jsnCfg.RedisClientKey
	}
	if jsnCfg.RedisCACertificate != nil {
		dbOpts.RedisCACertificate = *jsnCfg.RedisCACertificate
	}
	if jsnCfg.MongoQueryTimeout != nil {
		if dbOpts.MongoQueryTimeout, err = utils.ParseDurationWithNanosecs(*jsnCfg.MongoQueryTimeout); err != nil {
			return
		}
	}
	if jsnCfg.MongoConnScheme != nil {
		dbOpts.MongoConnScheme = *jsnCfg.MongoConnScheme
	}
	return
}

// loadFromJSONCfg loads Database config from JsonCfg
func (dbcfg *DataDbCfg) loadFromJSONCfg(jsnDbCfg *DbJsonCfg) (err error) {
	if jsnDbCfg == nil {
		return
	}
	if jsnDbCfg.Db_type != nil {
		if !strings.HasPrefix(*jsnDbCfg.Db_type, "*") {
			dbcfg.Type = fmt.Sprintf("*%v", *jsnDbCfg.Db_type)
		} else {
			dbcfg.Type = *jsnDbCfg.Db_type
		}
	}
	if jsnDbCfg.Db_host != nil {
		dbcfg.Host = *jsnDbCfg.Db_host
	}
	if jsnDbCfg.Db_port != nil {
		port := strconv.Itoa(*jsnDbCfg.Db_port)
		if port == "-1" {
			port = utils.MetaDynamic
		}
		dbcfg.Port = dbDefaultsCfg.dbPort(dbcfg.Type, port)
	}
	if jsnDbCfg.Db_name != nil {
		dbcfg.Name = *jsnDbCfg.Db_name
	}
	if jsnDbCfg.Db_user != nil {
		dbcfg.User = *jsnDbCfg.Db_user
	}
	if jsnDbCfg.Db_password != nil {
		dbcfg.Password = *jsnDbCfg.Db_password
	}
	if jsnDbCfg.Remote_conns != nil {
		dbcfg.RmtConns = make([]string, len(*jsnDbCfg.Remote_conns))
		for idx, rmtConn := range *jsnDbCfg.Remote_conns {
			// if we have the connection internal we change the name so we can have internal rpc for each subsystem
			if rmtConn == utils.MetaInternal {
				return fmt.Errorf("Remote connection ID needs to be different than *internal")
			}
			dbcfg.RmtConns[idx] = rmtConn
		}
	}
	if jsnDbCfg.Replication_conns != nil {
		dbcfg.RplConns = make([]string, len(*jsnDbCfg.Replication_conns))
		for idx, rplConn := range *jsnDbCfg.Replication_conns {
			// if we have the connection internal we change the name so we can have internal rpc for each subsystem
			if rplConn == utils.MetaInternal {
				return fmt.Errorf("Replication connection ID needs to be different than *internal")
			}
			dbcfg.RplConns[idx] = rplConn
		}
	}
	if jsnDbCfg.Items != nil {
		for kJsn, vJsn := range *jsnDbCfg.Items {
			val, has := dbcfg.Items[kJsn]
			if val == nil || !has {
				val = &ItemOpt{Limit: -1}
			}
			if err = val.loadFromJSONCfg(vJsn); err != nil {
				return
			}
			dbcfg.Items[kJsn] = val
		}
	}
	if jsnDbCfg.Replication_filtered != nil {
		dbcfg.RplFiltered = *jsnDbCfg.Replication_filtered
	}
	if jsnDbCfg.Remote_conn_id != nil {
		dbcfg.RmtConnID = *jsnDbCfg.Remote_conn_id
	}
	if jsnDbCfg.Replication_cache != nil {
		dbcfg.RplCache = *jsnDbCfg.Replication_cache
	}
	if jsnDbCfg.RplFailedDir != nil {
		dbcfg.RplFailedDir = *jsnDbCfg.RplFailedDir
	}
	if jsnDbCfg.RplInterval != nil {
		dbcfg.RplInterval, err = utils.ParseDurationWithNanosecs(*jsnDbCfg.RplInterval)
		if err != nil {
			return
		}
	}
	if jsnDbCfg.Opts != nil {
		err = dbcfg.Opts.loadFromJSONCfg(jsnDbCfg.Opts)
	}
	return
}

func (dbOpts *DataDBOpts) Clone() *DataDBOpts {
	return &DataDBOpts{
		InternalDBDumpPath:        dbOpts.InternalDBDumpPath,
		InternalDBBackupPath:      dbOpts.InternalDBBackupPath,
		InternalDBStartTimeout:    dbOpts.InternalDBStartTimeout,
		InternalDBDumpInterval:    dbOpts.InternalDBDumpInterval,
		InternalDBRewriteInterval: dbOpts.InternalDBRewriteInterval,
		InternalDBFileSizeLimit:   dbOpts.InternalDBFileSizeLimit,
		RedisMaxConns:             dbOpts.RedisMaxConns,
		RedisConnectAttempts:      dbOpts.RedisConnectAttempts,
		RedisSentinel:             dbOpts.RedisSentinel,
		RedisCluster:              dbOpts.RedisCluster,
		RedisClusterSync:          dbOpts.RedisClusterSync,
		RedisClusterOndownDelay:   dbOpts.RedisClusterOndownDelay,
		RedisConnectTimeout:       dbOpts.RedisConnectTimeout,
		RedisReadTimeout:          dbOpts.RedisReadTimeout,
		RedisWriteTimeout:         dbOpts.RedisWriteTimeout,
		RedisPoolPipelineWindow:   dbOpts.RedisPoolPipelineWindow,
		RedisPoolPipelineLimit:    dbOpts.RedisPoolPipelineLimit,
		RedisTLS:                  dbOpts.RedisTLS,
		RedisClientCertificate:    dbOpts.RedisClientCertificate,
		RedisClientKey:            dbOpts.RedisClientKey,
		RedisCACertificate:        dbOpts.RedisCACertificate,
		MongoQueryTimeout:         dbOpts.MongoQueryTimeout,
		MongoConnScheme:           dbOpts.MongoConnScheme,
	}
}

// Clone returns the cloned object
func (dbcfg *DataDbCfg) Clone() (cln *DataDbCfg) {
	cln = &DataDbCfg{
		Type:         dbcfg.Type,
		Host:         dbcfg.Host,
		Port:         dbcfg.Port,
		Name:         dbcfg.Name,
		User:         dbcfg.User,
		Password:     dbcfg.Password,
		RplFiltered:  dbcfg.RplFiltered,
		RplCache:     dbcfg.RplCache,
		RmtConnID:    dbcfg.RmtConnID,
		RplFailedDir: dbcfg.RplFailedDir,
		RplInterval:  dbcfg.RplInterval,
		Items:        make(map[string]*ItemOpt),
		Opts:         dbcfg.Opts.Clone(),
	}
	for k, itm := range dbcfg.Items {
		cln.Items[k] = itm.Clone()
	}
	if dbcfg.RmtConns != nil {
		cln.RmtConns = make([]string, len(dbcfg.RmtConns))
		copy(cln.RmtConns, dbcfg.RmtConns)
	}
	if dbcfg.RplConns != nil {
		cln.RplConns = make([]string, len(dbcfg.RplConns))
		copy(cln.RplConns, dbcfg.RplConns)
	}
	return
}

// AsMapInterface returns the config as a map[string]any
func (dbcfg *DataDbCfg) AsMapInterface() (mp map[string]any) {
	opts := map[string]any{
		utils.InternalDBDumpPathCfg:        dbcfg.Opts.InternalDBDumpPath,
		utils.InternalDBBackupPathCfg:      dbcfg.Opts.InternalDBBackupPath,
		utils.InternalDBStartTimeoutCfg:    dbcfg.Opts.InternalDBStartTimeout.String(),
		utils.InternalDBDumpIntervalCfg:    dbcfg.Opts.InternalDBDumpInterval.String(),
		utils.InternalDBRewriteIntervalCfg: dbcfg.Opts.InternalDBRewriteInterval.String(),
		utils.InternalDBFileSizeLimitCfg:   dbcfg.Opts.InternalDBFileSizeLimit,
		utils.RedisMaxConnsCfg:             dbcfg.Opts.RedisMaxConns,
		utils.RedisConnectAttemptsCfg:      dbcfg.Opts.RedisConnectAttempts,
		utils.RedisSentinelNameCfg:         dbcfg.Opts.RedisSentinel,
		utils.RedisClusterCfg:              dbcfg.Opts.RedisCluster,
		utils.RedisClusterSyncCfg:          dbcfg.Opts.RedisClusterSync.String(),
		utils.RedisClusterOnDownDelayCfg:   dbcfg.Opts.RedisClusterOndownDelay.String(),
		utils.RedisConnectTimeoutCfg:       dbcfg.Opts.RedisConnectTimeout.String(),
		utils.RedisReadTimeoutCfg:          dbcfg.Opts.RedisReadTimeout.String(),
		utils.RedisWriteTimeoutCfg:         dbcfg.Opts.RedisWriteTimeout.String(),
		utils.RedisPoolPipelineWindowCfg:   dbcfg.Opts.RedisPoolPipelineWindow.String(),
		utils.RedisPoolPipelineLimitCfg:    dbcfg.Opts.RedisPoolPipelineLimit,
		utils.RedisTLS:                     dbcfg.Opts.RedisTLS,
		utils.RedisClientCertificate:       dbcfg.Opts.RedisClientCertificate,
		utils.RedisClientKey:               dbcfg.Opts.RedisClientKey,
		utils.RedisCACertificate:           dbcfg.Opts.RedisCACertificate,
		utils.MongoQueryTimeoutCfg:         dbcfg.Opts.MongoQueryTimeout.String(),
		utils.MongoConnSchemeCfg:           dbcfg.Opts.MongoConnScheme,
	}
	mp = map[string]any{
		utils.DataDbTypeCfg:           dbcfg.Type,
		utils.DataDbHostCfg:           dbcfg.Host,
		utils.DataDbNameCfg:           dbcfg.Name,
		utils.DataDbUserCfg:           dbcfg.User,
		utils.DataDbPassCfg:           dbcfg.Password,
		utils.RemoteConnsCfg:          dbcfg.RmtConns,
		utils.RemoteConnIDCfg:         dbcfg.RmtConnID,
		utils.ReplicationConnsCfg:     dbcfg.RplConns,
		utils.ReplicationFilteredCfg:  dbcfg.RplFiltered,
		utils.ReplicationCache:        dbcfg.RplCache,
		utils.ReplicationFailedDirCfg: dbcfg.RplFailedDir,
		utils.ReplicationIntervalCfg:  dbcfg.RplInterval.String(),
		utils.OptsCfg:                 opts,
	}
	if dbcfg.Items != nil {
		items := make(map[string]any)
		for key, item := range dbcfg.Items {
			items[key] = item.AsMapInterface()
		}
		mp[utils.ItemsCfg] = items
	}
	if dbcfg.Port != "" {
		mp[utils.DataDbPortCfg], _ = strconv.Atoi(dbcfg.Port)
	}
	return
}

// ToTransCacheOpts returns to ltcache.TransCacheOpts from DataDBOpts
func (d *DataDBOpts) ToTransCacheOpts() (tco *ltcache.TransCacheOpts) {
	if d == nil {
		return
	}
	return &ltcache.TransCacheOpts{
		DumpPath:        d.InternalDBDumpPath,
		BackupPath:      d.InternalDBBackupPath,
		StartTimeout:    d.InternalDBStartTimeout,
		DumpInterval:    d.InternalDBDumpInterval,
		RewriteInterval: d.InternalDBRewriteInterval,
		FileSizeLimit:   d.InternalDBFileSizeLimit,
	}
}

// ItemOpt the options for the stored items
type ItemOpt struct {
	Limit     int
	TTL       time.Duration
	StaticTTL bool
	Remote    bool
	Replicate bool
	// used for ArgDispatcher in case we send this to a dispatcher engine
	RouteID string
	APIKey  string
}

// AsMapInterface returns the config as a map[string]any
func (itm *ItemOpt) AsMapInterface() (initialMP map[string]any) {
	initialMP = map[string]any{
		utils.RemoteCfg:    itm.Remote,
		utils.ReplicateCfg: itm.Replicate,
		utils.LimitCfg:     itm.Limit,
		utils.StaticTTLCfg: itm.StaticTTL,
	}
	if itm.APIKey != utils.EmptyString {
		initialMP[utils.APIKeyCfg] = itm.APIKey
	}
	if itm.RouteID != utils.EmptyString {
		initialMP[utils.RouteIDCfg] = itm.RouteID
	}
	if itm.TTL != 0 {
		initialMP[utils.TTLCfg] = itm.TTL.String()
	}
	return
}

func (itm *ItemOpt) loadFromJSONCfg(jsonItm *ItemOptJson) (err error) {
	if jsonItm == nil {
		return
	}
	if jsonItm.Limit != nil {
		itm.Limit = *jsonItm.Limit
	}
	if jsonItm.Static_ttl != nil {
		itm.StaticTTL = *jsonItm.Static_ttl
	}
	if jsonItm.Remote != nil {
		itm.Remote = *jsonItm.Remote
	}
	if jsonItm.Replicate != nil {
		itm.Replicate = *jsonItm.Replicate
	}
	if jsonItm.Route_id != nil {
		itm.RouteID = *jsonItm.Route_id
	}
	if jsonItm.Api_key != nil {
		itm.APIKey = *jsonItm.Api_key
	}
	if jsonItm.Ttl != nil {
		itm.TTL, err = utils.ParseDurationWithNanosecs(*jsonItm.Ttl)
	}
	return
}

// Clone returns a deep copy of ItemOpt
func (itm *ItemOpt) Clone() *ItemOpt {
	return &ItemOpt{
		Limit:     itm.Limit,
		TTL:       itm.TTL,
		StaticTTL: itm.StaticTTL,
		Remote:    itm.Remote,
		Replicate: itm.Replicate,
		APIKey:    itm.APIKey,
		RouteID:   itm.RouteID,
	}
}