package database

import "time"

// TargetType represents the type of delivery target
type TargetType string

// Target type values.
const (
	TargetTypeHTTP     TargetType = "http"
	TargetTypeDatabase TargetType = "database"
	TargetTypeLog      TargetType = "log"
	TargetTypeSlack    TargetType = "slack"
)

// Target represents a delivery target for a webhook. Its settings
// are the fields from URL to ArchiveRotation; each type uses some of
// them, and the ones a type does not use stay empty.
type Target struct {
	BaseModel

	WebhookID string     `gorm:"type:uuid;not null" json:"webhookId"`
	Name      string     `gorm:"not null"           json:"name"`
	Type      TargetType `gorm:"not null"           json:"type"`
	Active    bool       `gorm:"default:true"       json:"active"`

	// URL is where an http or slack target sends each event.
	//
	// json:"-" because the URL is the target's credential: a Slack
	// incoming-webhook URL, or an http destination whose path segments
	// are the secret. delivery.TargetView is the masking barrier for
	// the HTML path; this tag is the barrier for any handler that
	// marshals the model itself.
	URL string `json:"-"`

	// Headers is an http target's extra request headers, name to
	// value, stored as JSON text. json:"-" for the same reason as URL:
	// a header value is routinely an authorization token.
	Headers map[string]string `gorm:"serializer:json" json:"-"`

	// TimeoutSeconds is an http target's per-request timeout; 0 uses
	// the delivery engine's shared client timeout.
	TimeoutSeconds int `json:"timeoutSeconds,omitempty"`

	// ForwardQuery passes each event's query string on to an http
	// target, appended to URL. Off, URL is sent exactly as stored.
	ForwardQuery bool `json:"forwardQuery,omitempty"`

	// ArchiveExpiry is how long a database target keeps each archived
	// event; 0 keeps them forever.
	ArchiveExpiry time.Duration `json:"archiveExpiry,omitempty"`

	// ArchiveRotation is how often a database target starts a new
	// archive file: none, monthly, daily or hourly.
	ArchiveRotation string `json:"archiveRotation,omitempty"`

	// MaxAttempts is how many times an HTTP or Slack target attempts
	// each delivery in all, at least 1. 1 is a single attempt with no
	// circuit breaker; above 1, a failed attempt is retried with
	// backoff behind the breaker. The table's check constraint refuses
	// a target saved with less than 1, whatever its type.
	MaxAttempts int `gorm:"not null;check:max_attempts >= 1" json:"maxAttempts,omitempty"`

	// Relations. No model marshals the record it belongs to:
	// Webhook.Targets leads back here, and the JSON could loop.
	Webhook    Webhook    `json:"-"`
	Deliveries []Delivery `json:"deliveries,omitempty"`
}