package handlers

import (
	"time"

	"github.com/valyala/fasthttp"
)

const (
	// ActionTOTPRegistration is the string representation of the action for which the token has been produced.
	ActionTOTPRegistration = "RegisterTOTPDevice"

	// ActionWebauthnRegistration is the string representation of the action for which the token has been produced.
	ActionWebauthnRegistration = "RegisterWebauthnDevice"

	// ActionResetPassword is the string representation of the action for which the token has been produced.
	ActionResetPassword = "ResetPassword"
)

var (
	headerAuthorization      = []byte(fasthttp.HeaderAuthorization)
	headerProxyAuthorization = []byte(fasthttp.HeaderProxyAuthorization)

	headerSessionUsername = []byte("Session-Username")
	headerRemoteUser      = []byte("Remote-User")
	headerRemoteGroups    = []byte("Remote-Groups")
	headerRemoteName      = []byte("Remote-Name")
	headerRemoteEmail     = []byte("Remote-Email")
)

const (
	queryArgRD         = "rd"
	queryArgID         = "id"
	queryArgConsentID  = "consent_id"
	queryArgWorkflow   = "workflow"
	queryArgWorkflowID = "workflow_id"
)

var (
	qryArgID        = []byte(queryArgID)
	qryArgConsentID = []byte(queryArgConsentID)
)

const (
	// Forbidden means the user is forbidden the access to a resource.
	Forbidden authorizationMatching = iota
	// NotAuthorized means the user can access the resource with more permissions.
	NotAuthorized authorizationMatching = iota
	// Authorized means the user is authorized given her current permissions.
	Authorized authorizationMatching = iota
)

const (
	messageOperationFailed                 = "Operation failed."
	messageAuthenticationFailed            = "Authentication failed. Check your credentials."
	messageUnableToRegisterOneTimePassword = "Unable to set up one-time passwords." //nolint:gosec
	messageUnableToRegisterSecurityKey     = "Unable to register your security key."
	messageUnableToResetPassword           = "Unable to reset your password."
	messageMFAValidationFailed             = "Authentication failed, please retry later."
	messagePasswordWeak                    = "Your supplied password does not meet the password policy requirements"
)

const (
	workflowOpenIDConnect = "openid_connect"
)

const (
	logFmtErrParseRequestBody     = "Failed to parse %s request body: %+v"
	logFmtErrWriteResponseBody    = "Failed to write %s response body for user '%s': %+v"
	logFmtErrRegulationFail       = "Failed to perform %s authentication regulation for user '%s': %+v"
	logFmtErrSessionRegenerate    = "Could not regenerate session during %s authentication for user '%s': %+v"
	logFmtErrSessionReset         = "Could not reset session during %s authentication for user '%s': %+v"
	logFmtErrSessionSave          = "Could not save session with the %s during %s authentication for user '%s': %+v"
	logFmtErrObtainProfileDetails = "Could not obtain profile details during %s authentication for user '%s': %+v"
	logFmtTraceProfileDetails     = "Profile details for user '%s' => groups: %s, emails %s"
)

const (
	logFmtAuthorizationPrefix = "Authorization Request with id '%s' on client with id '%s' "

	logFmtErrConsentCantDetermineConsentMode = logFmtAuthorizationPrefix + "could not be processed: error occurred generating consent: client consent mode could not be reliably determined"

	logFmtConsentPrefix = logFmtAuthorizationPrefix + "using consent mode '%s' "

	logFmtErrConsentParseChallengeID = logFmtConsentPrefix + "could not be processed: error occurred parsing the consent id (challenge) '%s': %+v"
	logFmtErrConsentPreConfLookup    = logFmtConsentPrefix + "had error looking up pre-configured consent sessions: %+v"
	logFmtErrConsentPreConfRowsClose = logFmtConsentPrefix + "had error closing rows while looking up pre-configured consent sessions: %+v"
	logFmtErrConsentZeroID           = logFmtConsentPrefix + "could not be processed: the consent id had a zero value"
	logFmtErrConsentCantGetSubject   = logFmtConsentPrefix + "could not be processed: error occurred retrieving subject identifier for user '%s' and sector identifier '%s': %+v"
	logFmtErrConsentGenerateError    = logFmtConsentPrefix + "could not be processed: error occurred %s consent: %+v"

	logFmtDbgConsentGenerate                  = logFmtConsentPrefix + "proceeding to generate a new consent session"
	logFmtDbgConsentAuthenticationSufficiency = logFmtConsentPrefix + "authentication level '%s' is %s for client level '%s'"
	logFmtDbgConsentRedirect                  = logFmtConsentPrefix + "is being redirected to '%s'"
	logFmtDbgConsentPreConfSuccessfulLookup   = logFmtConsentPrefix + "successfully looked up pre-configured consent with signature of client id '%s' and subject '%s' and scopes '%s' with id '%d'"
	logFmtDbgConsentPreConfUnsuccessfulLookup = logFmtConsentPrefix + "unsuccessfully looked up pre-configured consent with signature of client id '%s' and subject '%s' and scopes '%s'"
	logFmtDbgConsentPreConfTryingLookup       = logFmtConsentPrefix + "attempting to discover pre-configurations with signature of client id '%s' and subject '%s' and scopes '%s'"

	logFmtErrConsentWithIDCouldNotBeProcessed = logFmtConsentPrefix + "could not be processed: error occurred performing consent for consent session with id '%s': "

	logFmtErrConsentLookupLoadingSession        = logFmtErrConsentWithIDCouldNotBeProcessed + "error occurred while loading session: %+v"
	logFmtErrConsentSessionSubjectNotAuthorized = logFmtErrConsentWithIDCouldNotBeProcessed + "user '%s' with subject '%s' is not authorized to consent for subject '%s'"
	logFmtErrConsentCantGrant                   = logFmtErrConsentWithIDCouldNotBeProcessed + "the session does not appear to be valid for %s consent: either the subject is null, the consent has already been granted, or the consent session is a pre-configured session"
	logFmtErrConsentCantGrantPreConf            = logFmtErrConsentWithIDCouldNotBeProcessed + "the session does not appear to be valid for pre-configured consent: either the subject is null, the consent has been granted and is either not pre-configured, or the pre-configuration is expired"
	logFmtErrConsentCantGrantRejected           = logFmtErrConsentWithIDCouldNotBeProcessed + "the user explicitly rejected this consent session"
	logFmtErrConsentSaveSessionResponse         = logFmtErrConsentWithIDCouldNotBeProcessed + "error occurred saving consent session response: %+v"
	logFmtErrConsentSaveSession                 = logFmtErrConsentWithIDCouldNotBeProcessed + "error occurred saving consent session: %+v"
	logFmtErrConsentGenerate                    = logFmtConsentPrefix + "could not be processed: error occurred generating consent: %+v"
)

const (
	testInactivity     = time.Second * 10
	testRedirectionURL = "http://redirection.local"
	testUsername       = "john"
	exampleDotCom      = "example.com"
)

// Duo constants.
const (
	allow  = "allow"
	deny   = "deny"
	enroll = "enroll"
	auth   = "auth"
)

const authPrefix = "Basic "

const ldapPasswordComplexityCode = "0000052D."

var ldapPasswordComplexityCodes = []string{
	"0000052D", "SynoNumber", "SynoMixedCase", "SynoExcludeNameDesc", "SynoSpecialChar",
}

var ldapPasswordComplexityErrors = []string{
	"LDAP Result Code 19 \"Constraint Violation\": Password fails quality checking policy",
	"LDAP Result Code 19 \"Constraint Violation\": Password is too young to change",
}