// Copyright (c) 2025-2026 Probo Inc <hello@probo.com>.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
// SOFTWARE.

package iam

import (
	"fmt"

	"go.probo.inc/probo/pkg/coredata"
	"go.probo.inc/probo/pkg/gid"
	"go.probo.inc/probo/pkg/mail"
)

type ErrInvalidToken struct{ message string }

func NewInvalidTokenError() error {
	return &ErrInvalidToken{"invalid token"}
}

func (e ErrInvalidToken) Error() string {
	return e.message
}

type ErrTokenAlreadyUsed struct{ message string }

func NewTokenAlreadyUsedError() error {
	return &ErrTokenAlreadyUsed{"this magic link has already been used"}
}

func (e ErrTokenAlreadyUsed) Error() string {
	return e.message
}

type ErrExpiredToken struct{ message string }

func NewExpiredTokenError() error {
	return &ErrExpiredToken{"token has expired"}
}

func (e ErrExpiredToken) Error() string {
	return e.message
}

type ErrInvitationAlreadyAccepted struct{ InvitationID gid.GID }

func NewInvitationAlreadyAcceptedError(invitationID gid.GID) error {
	return &ErrInvitationAlreadyAccepted{InvitationID: invitationID}
}

func (e ErrInvitationAlreadyAccepted) Error() string {
	return fmt.Sprintf("invitation %q already accepted", e.InvitationID)
}

type ErrInvitationNotFound struct{ InvitationID gid.GID }

func NewInvitationNotFoundError(invitationID gid.GID) error {
	return &ErrInvitationNotFound{InvitationID: invitationID}
}

func (e ErrInvitationNotFound) Error() string {
	return fmt.Sprintf("invitation %q not found", e.InvitationID)
}

type ErrInvitationExpired struct{ InvitationID gid.GID }

func NewInvitationExpiredError(invitationID gid.GID) error {
	return &ErrInvitationExpired{InvitationID: invitationID}
}

func (e ErrInvitationExpired) Error() string {
	return fmt.Sprintf("invitation %q expired", e.InvitationID)
}

type ErrIdentityAlreadyExists struct{ EmailAddress mail.Addr }

func NewIdentityAlreadyExistsError(emailAddress mail.Addr) error {
	return &ErrIdentityAlreadyExists{EmailAddress: emailAddress}
}

func (e ErrIdentityAlreadyExists) Error() string {
	return fmt.Sprintf("identity %q already exists", e.EmailAddress.String())
}

type ErrEmailAlreadyVerified struct{ message string }

func NewEmailAlreadyVerifiedError() error {
	return &ErrEmailAlreadyVerified{"email already verified"}
}

func (e ErrEmailAlreadyVerified) Error() string {
	return e.message
}

type ErrEmailNotVerified struct{ message string }

func NewEmailNotVerifiedError() error {
	return &ErrEmailNotVerified{"email address not verified"}
}

func (e ErrEmailNotVerified) Error() string {
	return e.message
}

type ErrIdentityNotFound struct{ IdentityID gid.GID }

func NewIdentityNotFoundError(identityID gid.GID) error {
	return &ErrIdentityNotFound{identityID}
}

func (e ErrIdentityNotFound) Error() string {
	return fmt.Sprintf("identity %q not found", e.IdentityID)
}

type ErrInvalidPassword struct{ message string }

func NewInvalidPasswordError(message string) error {
	return &ErrInvalidPassword{message}
}

func (e ErrInvalidPassword) Error() string {
	return e.message
}

type ErrEmailVerificationMismatch struct{ message string }

func NewEmailVerificationMismatchError() error {
	return &ErrEmailVerificationMismatch{"email verification mismatch"}
}

func (e ErrEmailVerificationMismatch) Error() string {
	return e.message
}

type ErrMembershipNotFound struct {
	MembershipID gid.GID
}

func NewMembershipNotFoundError(membershipID gid.GID) error {
	return &ErrMembershipNotFound{MembershipID: membershipID}
}

func (e ErrMembershipNotFound) Error() string {
	return fmt.Sprintf("membership %q not found", e.MembershipID)
}

type ErrUserInactive struct {
	ProfileID gid.GID
}

func NewUserInactiveError(profileID gid.GID) error {
	return &ErrUserInactive{ProfileID: profileID}
}

func (e ErrUserInactive) Error() string {
	return fmt.Sprintf("user %q is inactive", e.ProfileID)
}

type ErrUserManagedBySCIM struct {
	ProfileID gid.GID
}

func NewUserManagedBySCIMError(profileID gid.GID) error {
	return &ErrUserManagedBySCIM{ProfileID: profileID}
}

func (e ErrUserManagedBySCIM) Error() string {
	return fmt.Sprintf("user %q is managed by SCIM and cannot be deleted manually", e.ProfileID)
}

type ErrLastActiveOwner struct {
	MembershipID gid.GID
}

func NewLastActiveOwnerError(membershipID gid.GID) error {
	return &ErrLastActiveOwner{MembershipID: membershipID}
}

func (e ErrLastActiveOwner) Error() string {
	return fmt.Sprintf("cannot remove profile %q: last active owner of the organization", e.MembershipID)
}

type ErrProfileInUse struct {
	ProfileID gid.GID
}

func NewProfileInUseError(profileID gid.GID) error {
	return &ErrProfileInUse{ProfileID: profileID}
}

func (e ErrProfileInUse) Error() string {
	return fmt.Sprintf("cannot remove profile %q: referenced by other resources", e.ProfileID)
}

type ErrOrganizationNotFound struct{ OrganizationID gid.GID }

func NewOrganizationNotFoundError(organizationID gid.GID) error {
	return &ErrOrganizationNotFound{OrganizationID: organizationID}
}

func (e ErrOrganizationNotFound) Error() string {
	return fmt.Sprintf("organization %q not found", e.OrganizationID)
}

type ErrInsufficientPermissions struct {
	IdentityID gid.GID
	EntityID   gid.GID
	Action     Action
}

func NewInsufficientPermissionsError(identityID gid.GID, entityID gid.GID, action Action) error {
	return &ErrInsufficientPermissions{IdentityID: identityID, EntityID: entityID, Action: action}
}

func (e ErrInsufficientPermissions) Error() string {
	return fmt.Sprintf("identity %q does not have sufficient permissions to perform action %s on entity %q", e.IdentityID, e.Action, e.EntityID)
}

type ErrInsufficientOAuth2Scope struct {
	IdentityID gid.GID
	Scopes     []coredata.OAuth2Scope
}

func NewInsufficientOAuth2ScopeError(identityID gid.GID, scopes ...coredata.OAuth2Scope) error {
	return &ErrInsufficientOAuth2Scope{IdentityID: identityID, Scopes: scopes}
}

func (e ErrInsufficientOAuth2Scope) Error() string {
	return fmt.Sprintf(
		"identity %q does not have an OAuth2 scope granting the requested action",
		e.IdentityID,
	)
}

type ErrMixedOrganizationBatch struct {
	Action          Action
	OrganizationIDs []string
}

func NewMixedOrganizationBatchError(action Action, organizationIDs []string) error {
	return &ErrMixedOrganizationBatch{Action: action, OrganizationIDs: organizationIDs}
}

func (e ErrMixedOrganizationBatch) Error() string {
	return fmt.Sprintf(
		"cannot authorize batch action %s across organization ids %q",
		e.Action,
		e.OrganizationIDs,
	)
}

type ErrMixedEntityTypeBatch struct {
	Action      Action
	EntityTypes []uint16
}

func NewMixedEntityTypeBatchError(action Action, entityTypes []uint16) error {
	return &ErrMixedEntityTypeBatch{Action: action, EntityTypes: entityTypes}
}

func (e ErrMixedEntityTypeBatch) Error() string {
	return fmt.Sprintf(
		"cannot authorize batch action %s across entity types %v",
		e.Action,
		e.EntityTypes,
	)
}

type ErrEmptyResourceBatch struct {
	Action Action
}

func NewEmptyResourceBatchError(action Action) error {
	return &ErrEmptyResourceBatch{Action: action}
}

func (e ErrEmptyResourceBatch) Error() string {
	return fmt.Sprintf("cannot authorize batch action %s with an empty resource set", e.Action)
}

type ErrBatchAuthorizationUnsupportedResourceType struct {
	EntityType uint16
}

func NewBatchAuthorizationUnsupportedResourceTypeError(entityType uint16) error {
	return &ErrBatchAuthorizationUnsupportedResourceType{EntityType: entityType}
}

func (e ErrBatchAuthorizationUnsupportedResourceType) Error() string {
	return fmt.Sprintf("resource type %d does not support batch authorization attributes", e.EntityType)
}

type ErrAssumptionRequired struct {
	IdentityID   gid.GID
	MembershipID gid.GID
}

func NewAssumptionRequiredError(identityID gid.GID, membershipID gid.GID) error {
	return &ErrAssumptionRequired{IdentityID: identityID, MembershipID: membershipID}
}

func (e ErrAssumptionRequired) Error() string {
	return fmt.Sprintf("assumption for identity %q required for membership %q", e.IdentityID, e.MembershipID)
}

type ErrSessionNotFound struct{ SessionID gid.GID }

func NewSessionNotFoundError(sessionID gid.GID) error {
	return &ErrSessionNotFound{SessionID: sessionID}
}

func (e ErrSessionNotFound) Error() string {
	if e.SessionID == gid.Nil {
		return "session not found"
	}

	return fmt.Sprintf("session %q not found", e.SessionID)
}

type ErrSessionExpired struct{ SessionID gid.GID }

func NewSessionExpiredError(sessionID gid.GID) error {
	return &ErrSessionExpired{SessionID: sessionID}
}

func (e ErrSessionExpired) Error() string {
	return fmt.Sprintf("session %q expired", e.SessionID)
}

type ErrUserAlreadyExists struct {
	IdentityID     gid.GID
	OrganizationID gid.GID
}

func NewUserAlreadyExistsError(identityID gid.GID, organizationID gid.GID) error {
	return &ErrUserAlreadyExists{IdentityID: identityID, OrganizationID: organizationID}
}

func (e ErrUserAlreadyExists) Error() string {
	return fmt.Sprintf("user already exists for identity %q in organization %q", e.IdentityID, e.OrganizationID)
}

type ErrSAMLConfigurationNotFound struct{ ConfigID gid.GID }

func NewSAMLConfigurationNotFoundError(configID gid.GID) error {
	return &ErrSAMLConfigurationNotFound{ConfigID: configID}
}

func (e ErrSAMLConfigurationNotFound) Error() string {
	return fmt.Sprintf("SAML configuration %q not found", e.ConfigID)
}

type ErrPersonalAPIKeyNotFound struct{ PersonalAPIKeyID gid.GID }

func NewPersonalAPIKeyNotFoundError(personalAPIKeyID gid.GID) error {
	return &ErrPersonalAPIKeyNotFound{PersonalAPIKeyID: personalAPIKeyID}
}

func (e ErrPersonalAPIKeyNotFound) Error() string {
	return fmt.Sprintf("personal API key %q not found", e.PersonalAPIKeyID)
}

type ErrProfileNotFound struct{ ProfileID gid.GID }

func NewProfileNotFoundError(profileID gid.GID) error {
	return &ErrProfileNotFound{ProfileID: profileID}
}

func (e ErrProfileNotFound) Error() string {
	return fmt.Sprintf("profile %q not found", e.ProfileID)
}

type ErrPersonalAPIKeyExpired struct{ PersonalAPIKeyID gid.GID }

func NewPersonalAPIKeyExpiredError(personalAPIKeyID gid.GID) error {
	return &ErrPersonalAPIKeyExpired{PersonalAPIKeyID: personalAPIKeyID}
}

func (e ErrPersonalAPIKeyExpired) Error() string {
	return fmt.Sprintf("personal API key %q expired", e.PersonalAPIKeyID)
}

type ErrSAMLConfigurationDomainNotVerified struct{ ConfigID gid.GID }

func NewSAMLConfigurationDomainNotVerifiedError(configID gid.GID) error {
	return &ErrSAMLConfigurationDomainNotVerified{ConfigID: configID}
}

func (e ErrSAMLConfigurationDomainNotVerified) Error() string {
	return fmt.Sprintf("SAML configuration %q domain not verified", e.ConfigID)
}

type ErrUnsupportedPrincipalType struct{ EntityType uint16 }

func NewUnsupportedPrincipalTypeError(entityType uint16) error {
	return &ErrUnsupportedPrincipalType{EntityType: entityType}
}

func (e ErrUnsupportedPrincipalType) Error() string {
	return fmt.Sprintf("unsupported principal type: %d", e.EntityType)
}

type ErrSignupDisabled struct{}

func NewErrSignupDisabled() error {
	return &ErrSignupDisabled{}
}

func (e ErrSignupDisabled) Error() string {
	return "signup is disabled"
}

type ErrInvalidCredentials struct{ message string }

func NewInvalidCredentialsError(message string) error {
	return &ErrInvalidCredentials{message}
}

func (e ErrInvalidCredentials) Error() string {
	return e.message
}

type ErrPasswordAuthenticationRequired struct {
	Reason string
}

func NewPasswordAuthenticationRequiredError(reason string) *ErrPasswordAuthenticationRequired {
	return &ErrPasswordAuthenticationRequired{Reason: reason}
}

func (e *ErrPasswordAuthenticationRequired) Error() string {
	return fmt.Sprintf("password authentication required: %s", e.Reason)
}

type ErrSAMLAuthenticationRequired struct {
	Reason string
}

func NewSAMLAuthenticationRequiredError(reason string) *ErrSAMLAuthenticationRequired {
	return &ErrSAMLAuthenticationRequired{Reason: reason}
}

func (e *ErrSAMLAuthenticationRequired) Error() string {
	return fmt.Sprintf("SAML authentication required: %s", e.Reason)
}

type ErrSAMLConfigurationEmailDomainAlreadyExists struct{ EmailDomain string }

func NewSAMLConfigurationEmailDomainAlreadyExistsError(emailDomain string) error {
	return &ErrSAMLConfigurationEmailDomainAlreadyExists{EmailDomain: emailDomain}
}

func (e ErrSAMLConfigurationEmailDomainAlreadyExists) Error() string {
	return fmt.Sprintf("SAML configuration email domain %q already exists", e.EmailDomain)
}

type ErrNoSCIMConfigurationFound struct{ OrganizationID gid.GID }

func NewNoSCIMConfigurationFoundError(organizationID gid.GID) error {
	return &ErrNoSCIMConfigurationFound{OrganizationID: organizationID}
}

func (e ErrNoSCIMConfigurationFound) Error() string {
	return fmt.Sprintf("SCIM configuration not found for organization %q", e.OrganizationID)
}

type ErrSCIMBridgeNotFound struct{ BridgeID gid.GID }

func NewSCIMBridgeNotFoundError(bridgeID gid.GID) error {
	return &ErrSCIMBridgeNotFound{BridgeID: bridgeID}
}

func (e ErrSCIMBridgeNotFound) Error() string {
	return fmt.Sprintf("SCIM bridge %q not found", e.BridgeID)
}

type ErrConnectorNotFound struct{ ConnectorID gid.GID }

func NewConnectorNotFoundError(connectorID gid.GID) error {
	return &ErrConnectorNotFound{ConnectorID: connectorID}
}

func (e ErrConnectorNotFound) Error() string {
	return fmt.Sprintf("connector %q not found", e.ConnectorID)
}