package db

import "time"

// Validator and IP lifecycle states. Kept as typed string constants rather
// than a Go enum type so they round-trip through SQLite TEXT columns and
// JSON without conversion.
const (
	ValidatorUnregistered = "unregistered"
	ValidatorIdle         = "idle"
	ValidatorAssigned     = "assigned"
	ValidatorChecking     = "checking"
	ValidatorUnreachable  = "unreachable"

	// Site (prober) availability states — no assigned/checking equivalent,
	// since a prober isn't bound to one IP at a time.
	SiteUnregistered = "unregistered"
	SiteIdle         = "idle"
	SiteUnreachable  = "unreachable"

	IPQueued            = "queued"
	IPAssigningFIP      = "assigning_fip"
	IPAwaitingSelfCheck = "awaiting_self_check"
	IPChecking          = "checking"
	IPAggregating       = "aggregating"
	IPDone              = "done"
	IPFailed            = "failed"

	ResultPass      = "pass"
	ResultPartial   = "partial"
	ResultFail      = "fail"
	ResultCancelled = "cancelled"

	SourceEgress = "egress"
)

// InboundSource returns the checks.source value for the given prober site
// index (1-based), e.g. InboundSource(1) == "inbound-site-1".
func InboundSource(siteIndex int) string {
	return "inbound-site-" + itoa(siteIndex)
}

func itoa(n int) string {
	if n == 0 {
		return "0"
	}
	neg := n < 0
	if neg {
		n = -n
	}
	var buf [20]byte
	i := len(buf)
	for n > 0 {
		i--
		buf[i] = byte('0' + n%10)
		n /= 10
	}
	if neg {
		i--
		buf[i] = '-'
	}
	return string(buf[i:])
}

type Validator struct {
	ValidatorID     string
	Hostname        string
	OSPortID        string
	State           string
	CurrentIPID     *int64
	AgentVersion    string
	LastHeartbeatAt *time.Time
	CreatedAt       time.Time
	UpdatedAt       time.Time
}

type IPQueueItem struct {
	ID               int64
	IPAddress        string
	Sequence         int
	State            string
	OwnerValidatorID *string
	FIPID            string
	AttemptNumber    int
	RetryCount       int
	LeaseExpiresAt   *time.Time
	EgressComplete   bool
	OverallResult    string
	AssignedAt       *time.Time
	FIPAssociatedAt  *time.Time
	AggregatedAt     *time.Time
	FIPReleasedAt    *time.Time
	CreatedAt        time.Time
	UpdatedAt        time.Time
}

type Check struct {
	ID            int64
	IPID          int64
	IPAddress     string
	AttemptNumber int
	ValidatorID   string
	Source        string
	CheckType     string
	Target        string
	Success       bool
	LatencyMS     int64
	Detail        string
	CheckedAt     time.Time
	CreatedAt     time.Time
}

type Event struct {
	ID         int64
	SourceType string
	SourceID   string
	IPID       *int64
	EventType  string
	Payload    string
	OccurredAt time.Time
	CreatedAt  time.Time
}

type Site struct {
	Index           int
	SiteID          string
	Hostname        string
	State           string
	LastHeartbeatAt *time.Time
	CreatedAt       time.Time
	UpdatedAt       time.Time
}

type TargetGroup struct {
	Name      string
	Targets   []string
	CreatedAt time.Time
	UpdatedAt time.Time
}

type CheckType struct {
	Name         string
	Enabled      bool
	TargetGroups []string
	CreatedAt    time.Time
	UpdatedAt    time.Time
}

// ResolvedCheckType is a check type with its target groups already expanded
// into a flat target list — what AssignmentForValidator hands to an agent.
type ResolvedCheckType struct {
	Type    string
	Targets []string
}

// SubmitIPsResult categorizes how each address in a SubmitIPs call was
// handled.
type SubmitIPsResult struct {
	Added             []string
	Requeued          []string
	Reordered         []string
	SkippedInProgress []string
}

// DeleteIPsResult categorizes how each address in a DeleteIPs call (or a
// ClearQueue call, which is DeleteIPs given every currently queued address)
// was handled.
type DeleteIPsResult struct {
	Deleted  []string
	NotFound []string
}

// Settings is the singleton row of orchestrator-wide scalar knobs that are
// admin-configurable at runtime (see queries_settings.go).
type Settings struct {
	FIPSettleSeconds int
	CreatedAt        time.Time
	UpdatedAt        time.Time
}

// InboundChecksSettings is the singleton row describing what the prober
// checks on every site for every in-flight IP (TCP ports + optional ICMP).
// Admin-configurable at runtime (see queries_inbound.go).
type InboundChecksSettings struct {
	Ports     []int
	ICMP      bool
	CreatedAt time.Time
	UpdatedAt time.Time
}