/*
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 utils

import (
	"errors"
	"fmt"
	"strings"
)

var (
	ErrNoMoreData                       = errors.New("NO_MORE_DATA")
	ErrNotImplemented                   = errors.New("NOT_IMPLEMENTED")
	ErrNotFound                         = errors.New("NOT_FOUND")
	ErrDSPHostNotFound                  = errors.New("DSP_HOST_NOT_FOUND")
	ErrDSPProfileNotFound               = errors.New("DSP_PROFILE_NOT_FOUND")
	ErrTimedOut                         = errors.New("TIMED_OUT")
	ErrServerError                      = errors.New("SERVER_ERROR")
	ErrMaxRecursionDepth                = errors.New("MAX_RECURSION_DEPTH")
	ErrMandatoryIeMissing               = errors.New("MANDATORY_IE_MISSING")
	ErrExists                           = errors.New("EXISTS")
	ErrBrokenReference                  = errors.New("BROKEN_REFERENCE")
	ErrParserError                      = errors.New("PARSER_ERROR")
	ErrInvalidPath                      = errors.New("INVALID_PATH")
	ErrInvalidKey                       = errors.New("INVALID_KEY")
	ErrUnauthorizedDestination          = errors.New("UNAUTHORIZED_DESTINATION")
	ErrRatingPlanNotFound               = errors.New("RATING_PLAN_NOT_FOUND")
	ErrAccountNotFound                  = errors.New("ACCOUNT_NOT_FOUND")
	ErrAccountDisabled                  = errors.New("ACCOUNT_DISABLED")
	ErrInsufficientCredit               = errors.New("INSUFFICIENT_CREDIT")
	ErrInsufficientCreditBalanceBlocker = errors.New("INSUFFICIENT_CREDIT_BALANCE_BLOCKER")
	ErrNotConvertible                   = errors.New("NOT_CONVERTIBLE")
	ErrResourceUnavailable              = errors.New("RESOURCE_UNAVAILABLE")
	ErrResourceUnauthorized             = errors.New("RESOURCE_UNAUTHORIZED")
	ErrIPUnavailable                    = errors.New("IP_UNAVAILABLE")
	ErrIPUnauthorized                   = errors.New("IP_UNAUTHORIZED")
	ErrNoActiveSession                  = errors.New("NO_ACTIVE_SESSION")
	ErrPartiallyExecuted                = errors.New("PARTIALLY_EXECUTED")
	ErrMaxUsageExceeded                 = errors.New("MAX_USAGE_EXCEEDED")
	ErrMaxCostExceeded                  = errors.New("MAX_COST_EXCEEDED")
	ErrFilterNotPassingNoCaps           = errors.New("filter not passing")
	ErrNotConvertibleNoCaps             = errors.New("not convertible")
	ErrMandatoryIeMissingNoCaps         = errors.New("mandatory information missing")
	ErrUnauthorizedApi                  = errors.New("UNAUTHORIZED_API")
	ErrUnknownApiKey                    = errors.New("UNKNOWN_API_KEY")
	ErrReqUnsynchronized                = errors.New("REQ_UNSYNCHRONIZED")
	ErrUnsupporteServiceMethod          = errors.New("UNSUPPORTED_SERVICE_METHOD")
	ErrDisconnected                     = errors.New("DISCONNECTED")
	ErrReplyTimeout                     = errors.New("REPLY_TIMEOUT")
	ErrSessionNotFound                  = errors.New("SESSION_NOT_FOUND")
	ErrJsonIncompleteComment            = errors.New("JSON_INCOMPLETE_COMMENT")
	ErrNotEnoughParameters              = errors.New("NotEnoughParameters")
	ErrNotConnected                     = errors.New("NOT_CONNECTED")
	RalsErrorPrfx                       = "RALS_ERROR"
	DispatcherErrorPrefix               = "DISPATCHER_ERROR"
	RateSErrPrfx                        = "RATES_ERROR"
	ErrNotAuthorized                    = errors.New("NOT_AUTHORIZED")
	ErrUnsupportedFormat                = errors.New("UNSUPPORTED_FORMAT")
	ErrNoDatabaseConn                   = errors.New("NO_DATABASE_CONNECTION")
	ErrMaxIncrementsExceeded            = errors.New("MAX_INCREMENTS_EXCEEDED")
	ErrUncomputableIncrement            = errors.New("UNCOMPUTABLE_INCREMENT")
	ErrIndexOutOfBounds                 = errors.New("INDEX_OUT_OF_BOUNDS")
	ErrWrongPath                        = errors.New("WRONG_PATH")
	ErrServiceAlreadyRunning            = fmt.Errorf("service already running")
	ErrMaxConcurrentRPCExceededNoCaps   = errors.New("max concurrent rpc exceeded") // on internal we return this error for concureq
	ErrMaxConcurrentRPCExceeded         = errors.New("MAX_CONCURRENT_RPC_EXCEEDED") // but the codec will rewrite it with this one to be sure that we corectly dealocate the request
	ErrMaxIterationsReached             = errors.New("maximum iterations reached")
	ErrNegative                         = errors.New("NEGATIVE")
	ErrCastFailed                       = errors.New("CAST_FAILED")
	ErrNoBackupFound                    = errors.New("NO_BACKUP_FOUND")
	ErrCorrelationUndefined             = errors.New("CORRELATION_UNDEFINED")

	ErrMap = map[string]error{
		ErrNoMoreData.Error():                       ErrNoMoreData,
		ErrNotImplemented.Error():                   ErrNotImplemented,
		ErrDSPProfileNotFound.Error():               ErrDSPProfileNotFound,
		ErrDSPHostNotFound.Error():                  ErrDSPHostNotFound,
		ErrNotFound.Error():                         ErrNotFound,
		ErrTimedOut.Error():                         ErrTimedOut,
		ErrServerError.Error():                      ErrServerError,
		ErrMaxRecursionDepth.Error():                ErrMaxRecursionDepth,
		ErrExists.Error():                           ErrExists,
		ErrBrokenReference.Error():                  ErrBrokenReference,
		ErrParserError.Error():                      ErrParserError,
		ErrInvalidPath.Error():                      ErrInvalidPath,
		ErrInvalidKey.Error():                       ErrInvalidKey,
		ErrUnauthorizedDestination.Error():          ErrUnauthorizedDestination,
		ErrRatingPlanNotFound.Error():               ErrRatingPlanNotFound,
		ErrInsufficientCredit.Error():               ErrInsufficientCredit,
		ErrInsufficientCreditBalanceBlocker.Error(): ErrInsufficientCreditBalanceBlocker,
		ErrNotConvertible.Error():                   ErrNotConvertible,
		ErrResourceUnavailable.Error():              ErrResourceUnavailable,
		ErrResourceUnauthorized.Error():             ErrResourceUnauthorized,
		ErrIPUnavailable.Error():                    ErrIPUnavailable,
		ErrIPUnauthorized.Error():                   ErrIPUnauthorized,
		ErrNoActiveSession.Error():                  ErrNoActiveSession,
		ErrPartiallyExecuted.Error():                ErrPartiallyExecuted,
		ErrMaxUsageExceeded.Error():                 ErrMaxUsageExceeded,
		ErrFilterNotPassingNoCaps.Error():           ErrFilterNotPassingNoCaps,
		ErrNotConvertibleNoCaps.Error():             ErrNotConvertibleNoCaps,
		ErrUnauthorizedApi.Error():                  ErrUnauthorizedApi,
		ErrUnknownApiKey.Error():                    ErrUnknownApiKey,
		ErrReqUnsynchronized.Error():                ErrReqUnsynchronized,
		ErrUnsupporteServiceMethod.Error():          ErrUnsupporteServiceMethod,
		ErrDisconnected.Error():                     ErrDisconnected,
		ErrReplyTimeout.Error():                     ErrReplyTimeout,
		ErrSessionNotFound.Error():                  ErrSessionNotFound,
		ErrJsonIncompleteComment.Error():            ErrJsonIncompleteComment,
		ErrNotEnoughParameters.Error():              ErrNotEnoughParameters,
		ErrUnsupportedFormat.Error():                ErrUnsupportedFormat,
		ErrNoDatabaseConn.Error():                   ErrNoDatabaseConn,
		ErrMaxIncrementsExceeded.Error():            ErrMaxIncrementsExceeded,
		ErrIndexOutOfBounds.Error():                 ErrIndexOutOfBounds,
		ErrWrongPath.Error():                        ErrWrongPath,
		ErrDSPHostNotFound.Error():                  ErrDSPHostNotFound,
	}
)

// NewCGRError initialises a new CGRError
func NewCGRError(context, apiErr, shortErr, longErr string) *CGRError {
	return &CGRError{context: context, apiError: apiErr,
		shortError: shortErr, longError: longErr, errorMessage: shortErr}
}

// CGRError is a context based error
// returns always errorMessage but this can be switched based on methods called on it
type CGRError struct {
	context      string
	apiError     string
	shortError   string
	longError    string
	errorMessage string
}

func (err *CGRError) Context() string {
	return err.context
}

func (err *CGRError) Error() string {
	return err.errorMessage
}

func (err *CGRError) ActivateAPIError() {
	err.errorMessage = err.apiError
}

func (err *CGRError) ActivateShortError() {
	err.errorMessage = err.shortError
}

func (err *CGRError) ActivateLongError() {
	err.errorMessage = err.longError
}

func NewErrMandatoryIeMissing(fields ...string) error {
	return fmt.Errorf("MANDATORY_IE_MISSING: %v", fields)
}

func NewErrServerError(err error) error {
	return fmt.Errorf("SERVER_ERROR: %s", err)
}

func NewErrServiceNotOperational(serv string) error {
	return fmt.Errorf("SERVICE_NOT_OPERATIONAL: %s", serv)
}

func NewErrNotConnected(serv string) error {
	return fmt.Errorf("NOT_CONNECTED: %s", serv)
}

func NewErrRALs(err error) error {
	return fmt.Errorf("%s:%s", RalsErrorPrfx, err)
}

func NewErrResourceS(err error) error {
	return fmt.Errorf("RESOURCES_ERROR:%s", err)
}

func NewErrRouteS(err error) error {
	return fmt.Errorf("ROUTES_ERROR:%s", err)
}

func NewErrAttributeS(err error) error {
	return fmt.Errorf("ATTRIBUTES_ERROR:%s", err)
}

func NewErrChargerS(err error) error {
	return fmt.Errorf("CHARGERS_ERROR:%s", err)
}

func NewErrStatS(err error) error {
	return fmt.Errorf("STATS_ERROR:%s", err)
}

func NewErrCDRS(err error) error {
	return fmt.Errorf("CDRS_ERROR:%s", err)
}

func NewErrThresholdS(err error) error {
	return fmt.Errorf("THRESHOLDS_ERROR:%s", err)
}

func NewErrDispatcherS(err error) error {
	return fmt.Errorf("%s:%s", DispatcherErrorPrefix, err.Error())
}

func NewErrRateS(err error) error {
	return fmt.Errorf("%s:%s", RateSErrPrfx, err.Error())
}

// Centralized returns for APIs
func APIErrorHandler(errIn error) (err error) {
	cgrErr, ok := errIn.(*CGRError)
	if !ok {
		err = errIn
		if err != ErrNotFound && err != ErrDSPProfileNotFound && err != ErrDSPHostNotFound {
			err = NewErrServerError(err)
		}
		return
	}
	cgrErr.ActivateAPIError()
	return cgrErr
}

func NewErrStringCast(valIface any) error {
	return fmt.Errorf("cannot cast value: %v to string", valIface)
}

func NewErrFldStringCast(fldName string, valIface any) error {
	return fmt.Errorf("cannot cast field: %s with value: %v to string", fldName, valIface)
}

func ErrHasPrefix(err error, prfx string) (has bool) {
	if err == nil {
		return
	}
	return strings.HasPrefix(err.Error(), prfx)
}

func ErrPrefix(err error, reason string) error {
	return fmt.Errorf("%s:%s", err.Error(), reason)
}

func ErrPrefixNotFound(reason string) error {
	return ErrPrefix(ErrNotFound, reason)
}

func ErrPrefixNotErrNotImplemented(reason string) error {
	return ErrPrefix(ErrNotImplemented, reason)
}

func ErrEnvNotFound(key string) error {
	return ErrPrefix(ErrNotFound, "ENV_VAR:"+key)
}

func ErrPathNotReachable(path string) error {
	return fmt.Errorf("path:%+q is not reachable", path)
}

func ErrNotConvertibleTF(from, to string) error {
	return fmt.Errorf("%s : from: %s to:%s", ErrNotConvertibleNoCaps.Error(), from, to)
}

func ErrInvalidTime(s string) error {
	return fmt.Errorf("INVALID_TIME:%s", s)
}

// NewSTIRError returns a error with a *stir_authorize prefix
func NewSTIRError(reason string) error {
	return fmt.Errorf("%s: %s", MetaSTIRAuthenticate, reason)
}