package models

import "rocketgit.ru/rsmon/worker/app/models/concerns"

// Group represents a monitor group.
type Group struct {
	concerns.Model

	AccountID     int64          `gorm:"type:bigint REFERENCES accounts(id)" json:"account_id"`
	Account       *Account       `json:"-"`
	Name          string         `json:"name" gorm:"not null"`
	IsSystem      *bool          `json:"is_system" gorm:"default:false"`
	MonitorsCount int            `gorm:"-:all" json:"monitors_count"`
	Monitors      []Monitor      `json:"-"`
	Notifications []Notification `gorm:"many2many:notification_groups;" json:"-"`

	concerns.Timestamped `json:"-"`
	Audited
}

// SystemGroups returns all groups marked as system/internal (is_system=true).
// These groups are converted to distributed monitors (system checks running
// on the distributed worker pool).
func SystemGroups() ([]Group, error) {
	var groups []Group
	err := DB().Where("is_system = ?", true).Find(&groups).Error
	return groups, err
}

// GroupIdsForAccountId returns all group IDs for the given account.
func GroupIdsForAccountId(accountID int64) []int64 { //nolint:revive // accepted lint exception
	rows, err := DB().Raw("SELECT id FROM groups WHERE account_id = ?", accountID).Rows()
	if err != nil {
		panic(err)
	}
	defer rows.Close() //nolint:errcheck // accepted lint exception
	var cid int64
	groupIDs := make([]int64, 0)
	for rows.Next() {
		rows.Scan(&cid) //nolint:errcheck // accepted lint exception
		groupIDs = append(groupIDs, cid)
	}
	return groupIDs
}

// CountGroups counts monitors per group.
func CountGroups(groupIDs []int64, groupCount *map[int64]int) { //nolint:gocritic // ptrToRefParam: accepted pattern
	rows, err := DB().Raw("select group_id, count(id) from monitors where group_id IN (?) group by group_id ", groupIDs).Rows()
	if err != nil {
		panic(err)
	}
	defer rows.Close() //nolint:errcheck // accepted lint exception

	var gid int64
	var count int
	for rows.Next() {
		rows.Scan(&gid, &count) //nolint:errcheck // accepted lint exception
		(*groupCount)[gid] = count
	}
}

// GroupsCounts fills MonitorsCount for each group.
func GroupsCounts(groups *[]Group) {
	groupIDs := make([]int64, len(*groups))
	groupCount := make(map[int64]int, len(*groups))
	for i, g := range *groups { //nolint:gocritic // range copy is acceptable here
		groupIDs[i] = g.ID
		groupCount[g.ID] = 0
	}

	CountGroups(groupIDs, &groupCount)

	for i, g := range *groups { //nolint:gocritic // range copy is acceptable here
		(*groups)[i].MonitorsCount = groupCount[g.ID]
	}
}