// Package core is the backbone of PocketBase.
//
// It defines the main PocketBase App interface and its base implementation.
package core

import (
	"github.com/pocketbase/dbx"
	"github.com/pocketbase/pocketbase/daos"
	"github.com/pocketbase/pocketbase/tools/filesystem"
	"github.com/pocketbase/pocketbase/tools/hook"
	"github.com/pocketbase/pocketbase/tools/mailer"
	"github.com/pocketbase/pocketbase/tools/store"
	"github.com/pocketbase/pocketbase/tools/subscriptions"
)

// App defines the main PocketBase app interface.
type App interface {
	// DB returns the default app database instance.
	DB() *dbx.DB

	// Dao returns the default app Dao instance.
	//
	// This Dao could operate only on the tables and models
	// associated with the default app database. For example,
	// trying to access the request logs table will result in error.
	Dao() *daos.Dao

	// LogsDB returns the app logs database instance.
	LogsDB() *dbx.DB

	// LogsDao returns the app logs Dao instance.
	//
	// This Dao could operate only on the tables and models
	// associated with the logs database. For example, trying to access
	// the users table from LogsDao will result in error.
	LogsDao() *daos.Dao

	// DataDir returns the app data directory path.
	DataDir() string

	// EncryptionEnv returns the name of the app secret env key
	// (used for settings encryption).
	EncryptionEnv() string

	// IsDebug returns whether the app is in debug mode
	// (showing more detailed error logs, executed sql statements, etc.).
	IsDebug() bool

	// Settings returns the loaded app settings.
	Settings() *Settings

	// Cache returns the app internal cache store.
	Cache() *store.Store[any]

	// SubscriptionsBroker returns the app realtime subscriptions broker instance.
	SubscriptionsBroker() *subscriptions.Broker

	// NewMailClient creates and returns a configured app mail client.
	NewMailClient() mailer.Mailer

	// NewFilesystem creates and returns a configured filesystem.System instance.
	//
	// NB! Make sure to call `Close()` on the returned result
	// after you are done working with it.
	NewFilesystem() (*filesystem.System, error)

	// RefreshSettings reinitializes and reloads the stored application settings.
	RefreshSettings() error

	// Bootstrap takes care for initializing the application
	// (open db connections, load settings, etc.)
	Bootstrap() error

	// ResetBootstrapState takes care for releasing initialized app resources
	// (eg. closing db connections).
	ResetBootstrapState() error

	// ---------------------------------------------------------------
	// App event hooks
	// ---------------------------------------------------------------

	// OnBeforeServe hook is triggered before serving the internal router (echo),
	// allowing you to adjust its options and attach new routes.
	OnBeforeServe() *hook.Hook[*ServeEvent]

	// ---------------------------------------------------------------
	// Dao event hooks
	// ---------------------------------------------------------------

	// OnModelBeforeCreate hook is triggered before inserting a new
	// entry in the DB, allowing you to modify or validate the stored data.
	OnModelBeforeCreate() *hook.Hook[*ModelEvent]

	// OnModelAfterCreate hook is triggered after successfully
	// inserting a new entry in the DB.
	OnModelAfterCreate() *hook.Hook[*ModelEvent]

	// OnModelBeforeUpdate hook is triggered before updating existing
	// entry in the DB, allowing you to modify or validate the stored data.
	OnModelBeforeUpdate() *hook.Hook[*ModelEvent]

	// OnModelAfterUpdate hook is triggered after successfully updating
	// existing entry in the DB.
	OnModelAfterUpdate() *hook.Hook[*ModelEvent]

	// OnModelBeforeDelete hook is triggered before deleting an
	// existing entry from the DB.
	OnModelBeforeDelete() *hook.Hook[*ModelEvent]

	// OnModelAfterDelete is triggered after successfully deleting an
	// existing entry from the DB.
	OnModelAfterDelete() *hook.Hook[*ModelEvent]

	// ---------------------------------------------------------------
	// Mailer event hooks
	// ---------------------------------------------------------------

	// OnMailerBeforeAdminResetPasswordSend hook is triggered right before
	// sending a password reset email to an admin.
	//
	// Could be used to send your own custom email template if
	// hook.StopPropagation is returned in one of its listeners.
	OnMailerBeforeAdminResetPasswordSend() *hook.Hook[*MailerAdminEvent]

	// OnMailerAfterAdminResetPasswordSend hook is triggered after
	// admin password reset email was successfully sent.
	OnMailerAfterAdminResetPasswordSend() *hook.Hook[*MailerAdminEvent]

	// OnMailerBeforeUserResetPasswordSend hook is triggered right before
	// sending a password reset email to a user.
	//
	// Could be used to send your own custom email template if
	// hook.StopPropagation is returned in one of its listeners.
	OnMailerBeforeUserResetPasswordSend() *hook.Hook[*MailerUserEvent]

	// OnMailerAfterUserResetPasswordSend hook is triggered after
	// a user password reset email was successfully sent.
	OnMailerAfterUserResetPasswordSend() *hook.Hook[*MailerUserEvent]

	// OnMailerBeforeUserVerificationSend hook is triggered right before
	// sending a verification email to a user.
	//
	// Could be used to send your own custom email template if
	// hook.StopPropagation is returned in one of its listeners.
	OnMailerBeforeUserVerificationSend() *hook.Hook[*MailerUserEvent]

	// OnMailerAfterUserVerificationSend hook is triggered after a user
	// verification email was successfully sent.
	OnMailerAfterUserVerificationSend() *hook.Hook[*MailerUserEvent]

	// OnMailerBeforeUserChangeEmailSend hook is triggered right before
	// sending a confirmation new address email to a a user.
	//
	// Could be used to send your own custom email template if
	// hook.StopPropagation is returned in one of its listeners.
	OnMailerBeforeUserChangeEmailSend() *hook.Hook[*MailerUserEvent]

	// OnMailerAfterUserChangeEmailSend hook is triggered after a user
	// change address email was successfully sent.
	OnMailerAfterUserChangeEmailSend() *hook.Hook[*MailerUserEvent]

	// ---------------------------------------------------------------
	// Realtime API event hooks
	// ---------------------------------------------------------------

	// OnRealtimeConnectRequest hook is triggered right before establishing
	// the SSE client connection.
	OnRealtimeConnectRequest() *hook.Hook[*RealtimeConnectEvent]

	// OnRealtimeBeforeSubscribeRequest hook is triggered before changing
	// the client subscriptions, allowing you to further validate and
	// modify the submitted change.
	OnRealtimeBeforeSubscribeRequest() *hook.Hook[*RealtimeSubscribeEvent]

	// OnRealtimeAfterSubscribeRequest hook is triggered after the client
	// subscriptions were successfully changed.
	OnRealtimeAfterSubscribeRequest() *hook.Hook[*RealtimeSubscribeEvent]

	// ---------------------------------------------------------------
	// Settings API event hooks
	// ---------------------------------------------------------------

	// OnSettingsListRequest hook is triggered on each successful
	// API Settings list request.
	//
	// Could be used to validate or modify the response before
	// returning it to the client.
	OnSettingsListRequest() *hook.Hook[*SettingsListEvent]

	// OnSettingsBeforeUpdateRequest hook is triggered before each API
	// Settings update request (after request data load and before settings persistence).
	//
	// Could be used to additionally validate the request data or
	// implement completely different persistence behavior
	// (returning hook.StopPropagation).
	OnSettingsBeforeUpdateRequest() *hook.Hook[*SettingsUpdateEvent]

	// OnSettingsAfterUpdateRequest hook is triggered after each
	// successful API Settings update request.
	OnSettingsAfterUpdateRequest() *hook.Hook[*SettingsUpdateEvent]

	// ---------------------------------------------------------------
	// File API event hooks
	// ---------------------------------------------------------------

	// OnFileDownloadRequest hook is triggered before each API File download request.
	//
	// Could be used to validate or modify the file response before
	// returning it to the client.
	OnFileDownloadRequest() *hook.Hook[*FileDownloadEvent]

	// ---------------------------------------------------------------
	// Admin API event hooks
	// ---------------------------------------------------------------

	// OnAdminsListRequest hook is triggered on each API Admins list request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnAdminsListRequest() *hook.Hook[*AdminsListEvent]

	// OnAdminViewRequest hook is triggered on each API Admin view request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnAdminViewRequest() *hook.Hook[*AdminViewEvent]

	// OnAdminBeforeCreateRequest hook is triggered before each API
	// Admin create request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnAdminBeforeCreateRequest() *hook.Hook[*AdminCreateEvent]

	// OnAdminAfterCreateRequest hook is triggered after each
	// successful API Admin create request.
	OnAdminAfterCreateRequest() *hook.Hook[*AdminCreateEvent]

	// OnAdminBeforeUpdateRequest hook is triggered before each API
	// Admin update request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnAdminBeforeUpdateRequest() *hook.Hook[*AdminUpdateEvent]

	// OnAdminAfterUpdateRequest hook is triggered after each
	// successful API Admin update request.
	OnAdminAfterUpdateRequest() *hook.Hook[*AdminUpdateEvent]

	// OnAdminBeforeDeleteRequest hook is triggered before each API
	// Admin delete request (after model load and before actual deletion).
	//
	// Could be used to additionally validate the request data or implement
	// completely different delete behavior (returning hook.StopPropagation).
	OnAdminBeforeDeleteRequest() *hook.Hook[*AdminDeleteEvent]

	// OnAdminAfterDeleteRequest hook is triggered after each
	// successful API Admin delete request.
	OnAdminAfterDeleteRequest() *hook.Hook[*AdminDeleteEvent]

	// OnAdminAuthRequest hook is triggered on each successful API Admin
	// authentication request (sign-in, token refresh, etc.).
	//
	// Could be used to additionally validate or modify the
	// authenticated admin data and token.
	OnAdminAuthRequest() *hook.Hook[*AdminAuthEvent]

	// ---------------------------------------------------------------
	// User API event hooks
	// ---------------------------------------------------------------

	// OnUsersListRequest hook is triggered on each API Users list request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnUsersListRequest() *hook.Hook[*UsersListEvent]

	// OnUserViewRequest hook is triggered on each API User view request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnUserViewRequest() *hook.Hook[*UserViewEvent]

	// OnUserBeforeCreateRequest hook is triggered before each API User
	// create request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnUserBeforeCreateRequest() *hook.Hook[*UserCreateEvent]

	// OnUserAfterCreateRequest hook is triggered after each
	// successful API User create request.
	OnUserAfterCreateRequest() *hook.Hook[*UserCreateEvent]

	// OnUserBeforeUpdateRequest hook is triggered before each API User
	// update request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnUserBeforeUpdateRequest() *hook.Hook[*UserUpdateEvent]

	// OnUserAfterUpdateRequest hook is triggered after each
	// successful API User update request.
	OnUserAfterUpdateRequest() *hook.Hook[*UserUpdateEvent]

	// OnUserBeforeDeleteRequest hook is triggered before each API User
	// delete request (after model load and before actual deletion).
	//
	// Could be used to additionally validate the request data or implement
	// completely different delete behavior (returning hook.StopPropagation).
	OnUserBeforeDeleteRequest() *hook.Hook[*UserDeleteEvent]

	// OnUserAfterDeleteRequest hook is triggered after each
	// successful API User delete request.
	OnUserAfterDeleteRequest() *hook.Hook[*UserDeleteEvent]

	// OnUserAuthRequest hook is triggered on each successful API User
	// authentication request (sign-in, token refresh, etc.).
	//
	// Could be used to additionally validate or modify the
	// authenticated user data and token.
	OnUserAuthRequest() *hook.Hook[*UserAuthEvent]

	// OnUserBeforeOauth2Register hook is triggered before each User OAuth2
	// authentication request (when the client config has enabled new users registration).
	//
	// Could be used to additionally validate or modify the new user
	// before persisting in the DB.
	OnUserBeforeOauth2Register() *hook.Hook[*UserOauth2RegisterEvent]

	// OnUserAfterOauth2Register hook is triggered after each successful User
	// OAuth2 authentication sign-up request (right after the new user persistence).
	OnUserAfterOauth2Register() *hook.Hook[*UserOauth2RegisterEvent]

	// ---------------------------------------------------------------
	// Record API event hooks
	// ---------------------------------------------------------------

	// OnRecordsListRequest hook is triggered on each API Records list request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnRecordsListRequest() *hook.Hook[*RecordsListEvent]

	// OnRecordViewRequest hook is triggered on each API Record view request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnRecordViewRequest() *hook.Hook[*RecordViewEvent]

	// OnRecordBeforeCreateRequest hook is triggered before each API Record
	// create request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnRecordBeforeCreateRequest() *hook.Hook[*RecordCreateEvent]

	// OnRecordAfterCreateRequest hook is triggered after each
	// successful API Record create request.
	OnRecordAfterCreateRequest() *hook.Hook[*RecordCreateEvent]

	// OnRecordBeforeUpdateRequest hook is triggered before each API Record
	// update request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnRecordBeforeUpdateRequest() *hook.Hook[*RecordUpdateEvent]

	// OnRecordAfterUpdateRequest hook is triggered after each
	// successful API Record update request.
	OnRecordAfterUpdateRequest() *hook.Hook[*RecordUpdateEvent]

	// OnRecordBeforeDeleteRequest hook is triggered before each API Record
	// delete request (after model load and before actual deletion).
	//
	// Could be used to additionally validate the request data or implement
	// completely different delete behavior (returning hook.StopPropagation).
	OnRecordBeforeDeleteRequest() *hook.Hook[*RecordDeleteEvent]

	// OnRecordAfterDeleteRequest hook is triggered after each
	// successful API Record delete request.
	OnRecordAfterDeleteRequest() *hook.Hook[*RecordDeleteEvent]

	// ---------------------------------------------------------------
	// Collection API event hooks
	// ---------------------------------------------------------------

	// OnCollectionsListRequest hook is triggered on each API Collections list request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnCollectionsListRequest() *hook.Hook[*CollectionsListEvent]

	// OnCollectionViewRequest hook is triggered on each API Collection view request.
	//
	// Could be used to validate or modify the response before returning it to the client.
	OnCollectionViewRequest() *hook.Hook[*CollectionViewEvent]

	// OnCollectionBeforeCreateRequest hook is triggered before each API Collection
	// create request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnCollectionBeforeCreateRequest() *hook.Hook[*CollectionCreateEvent]

	// OnCollectionAfterCreateRequest hook is triggered after each
	// successful API Collection create request.
	OnCollectionAfterCreateRequest() *hook.Hook[*CollectionCreateEvent]

	// OnCollectionBeforeUpdateRequest hook is triggered before each API Collection
	// update request (after request data load and before model persistence).
	//
	// Could be used to additionally validate the request data or implement
	// completely different persistence behavior (returning hook.StopPropagation).
	OnCollectionBeforeUpdateRequest() *hook.Hook[*CollectionUpdateEvent]

	// OnCollectionAfterUpdateRequest hook is triggered after each
	// successful API Collection update request.
	OnCollectionAfterUpdateRequest() *hook.Hook[*CollectionUpdateEvent]

	// OnCollectionBeforeDeleteRequest hook is triggered before each API
	// Collection delete request (after model load and before actual deletion).
	//
	// Could be used to additionally validate the request data or implement
	// completely different delete behavior (returning hook.StopPropagation).
	OnCollectionBeforeDeleteRequest() *hook.Hook[*CollectionDeleteEvent]

	// OnCollectionAfterDeleteRequest hook is triggered after each
	// successful API Collection delete request.
	OnCollectionAfterDeleteRequest() *hook.Hook[*CollectionDeleteEvent]
}