package models

import (
	"database/sql"

	"gorm.io/gen"
	"gorm.io/gorm"
)

// Notifications inform users of inbound events
// happening to their content
type Notification struct {
	gorm.Model
	ForUser      User // The user the notification is for
	ForUserId    string
	SourceNote   *Note // The note where the notification originates from
	SourceNoteId sql.NullString
	SourceUser   *User // The user causing the notification
	SourceUserId sql.NullString
	Cause        NotificationCauseType   // What the cause of the notification is
	ViewedState  NotificationViewedState // What the last known state of the notification is
}

type INotification interface {
	// Update a given set of notifications to a given viewed state.
	// State should be a [NotificationViewedStateType]
	//
	// UPDATE @@table SET viewed_state = @state WHERE id IN @ids
	SetState(state uint8, ids ...uint) error

	// Get the lastest count amount of notifications with a given offset for a user
	//
	// SELECT * FROM @@table WHERE for_user_id = @userId
	// ORDER BY id DESC
	// {{if count > 0 }}
	//   LIMIT @count
	// {{else}}
	//   LIMIT 20
	// {{end}}
	// OFFSET @offset
	GetLatestWithOffset(userId string, count uint, offset uint) ([]gen.T, error)
}