package monitor

import "time"

// MaxProbeTimeout is the longest agent probe timeout (currently HTTP).
// Hub requests that run a probe must allow this time in addition to transport overhead.
const MaxProbeTimeout = 10 * time.Second

type SyncAction uint8

const (
	// SyncActionReplace indicates a full sync where the provided configs should replace all existing monitors for the system.
	SyncActionReplace SyncAction = iota
	// SyncActionUpsert indicates an incremental sync where the provided config should be added or updated.
	SyncActionUpsert
	// SyncActionDelete indicates an incremental sync where the provided config should be removed.
	SyncActionDelete
)

// Config defines a network monitor task sent from hub to agent.
type Config struct {
	// ID is the stable network_monitors record ID generated by the hub.
	ID       string `cbor:"0,keyasint"`
	Target   string `cbor:"1,keyasint"`
	Protocol string `cbor:"2,keyasint"` // "icmp", "tcp", "http", or "dns"
	Port     uint16 `cbor:"3,keyasint,omitempty"`
	Interval uint16 `cbor:"4,keyasint"` // seconds
}

// SyncRequest defines an incremental or full monitor sync request sent to the agent.
type SyncRequest struct {
	Action  SyncAction `cbor:"0,keyasint"`
	Config  Config     `cbor:"1,keyasint,omitempty"`
	Configs []Config   `cbor:"2,keyasint,omitempty"`
	RunNow  bool       `cbor:"3,keyasint,omitempty"`
}

// SyncResponse returns the immediate result for an upsert when requested.
type SyncResponse struct {
	Result Result `cbor:"0,keyasint,omitempty"`
}

// Result holds aggregated monitor results for a single target.
//
// 0: avg response in microseconds
//
// 1: 1h average response in microseconds
//
// 2: min response in microseconds
//
// 3: 1h min response in microseconds
//
// 4: max response in microseconds
//
// 5: 1h max response in microseconds
//
// 6: packet loss percentage (0-100)
//
// 7: 1h packet loss percentage (0-100)
type Result struct {
	AvgResponse   int64   `cbor:"0,keyasint,omitempty"`
	AvgResponse1h int64   `cbor:"1,keyasint,omitempty"`
	MinResponse   int64   `cbor:"2,keyasint,omitempty"`
	MinResponse1h int64   `cbor:"3,keyasint,omitempty"`
	MaxResponse   int64   `cbor:"4,keyasint,omitempty"`
	MaxResponse1h int64   `cbor:"5,keyasint,omitempty"`
	PacketLoss    float64 `cbor:"6,keyasint,omitempty"`
	PacketLoss1h  float64 `cbor:"7,keyasint,omitempty"`
	// LastProbeAt is the latest completed probe's Unix timestamp in milliseconds.
	LastProbeAt int64 `cbor:"8,keyasint"`
	// SampleCount includes all completed probes since this monitor started.
	// Used for alert warm-up even when the interval is longer than 20 minutes.
	SampleCount int64 `cbor:"9,keyasint,omitempty"`
	// Counts and sum cover the current response window (or latest-sample
	// fallback), not the hourly window or lifetime SampleCount.
	TotalCount   int64 `cbor:"10,keyasint"`
	SuccessCount int64 `cbor:"11,keyasint"`
	ResponseSum  int64 `cbor:"12,keyasint"`
}

// Stats holds response times in microseconds and packet loss percentage (0-100).
type Stats struct {
	ResAvg       float64 `json:"res_avg" db:"-"` // Derived for display; not stored.
	ResMin       float64 `json:"res_min" db:"res_min"`
	ResMax       float64 `json:"res_max" db:"res_max"`
	Loss         float64 `json:"loss" db:"-"` // Derived for display; not stored.
	TotalCount   int64   `json:"-" db:"total_count"`
	SuccessCount int64   `json:"-" db:"success_count"`
	ResponseSum  int64   `json:"-" db:"res_sum"`
}

func (s Stats) FromResult(result Result) Stats {
	return Stats{
		ResAvg:       float64(result.AvgResponse),
		ResMin:       float64(result.MinResponse),
		ResMax:       float64(result.MaxResponse),
		Loss:         result.PacketLoss,
		TotalCount:   result.TotalCount,
		SuccessCount: result.SuccessCount,
		ResponseSum:  result.ResponseSum,
	}
}