// Package domain contains pure domain models with no external dependencies.
package domain

import "time"

// SessionID is a strongly-typed identifier for sessions.
type SessionID string

// SessionStatus represents the state of a session.
type SessionStatus string

const (
	// SessionStatusActive indicates the session is currently in use.
	SessionStatusActive SessionStatus = "active"

	// SessionStatusEnded indicates the session was completed via checkin.
	SessionStatusEnded SessionStatus = "ended"

	// SessionStatusExpired indicates the session expired without checkin.
	SessionStatusExpired SessionStatus = "expired"
)

// Session represents an interactive remote development session.
// A session composes a checkout (git token + branch), pod binding, and ephemeral preview URL.
type Session struct {
	// ID is the unique session identifier.
	ID SessionID

	// ProjectID is the project this session belongs to.
	ProjectID ProjectID

	// CheckoutID links to the checkout that provides git access.
	CheckoutID CheckoutID

	// PodName is the bound project pod for command execution.
	PodName string

	// PreviewURL is the full HTTPS URL for the ephemeral preview.
	// Format: https://{session-slug}.preview.threesix.ai
	PreviewURL string

	// PreviewHost is the hostname for the K8s Ingress.
	// Format: {session-slug}.preview.threesix.ai
	PreviewHost string

	// CreatedBy is the user or API key that created the session.
	CreatedBy string

	// CreatedAt is when the session was created.
	CreatedAt time.Time

	// ExpiresAt is when the session will automatically expire.
	ExpiresAt time.Time

	// Status is the current state of the session.
	Status SessionStatus

	// EndedAt is when the session was ended (if ended or expired).
	EndedAt *time.Time
}

// IsActive returns true if the session can still be used.
func (s *Session) IsActive() bool {
	return s.Status == SessionStatusActive && time.Now().Before(s.ExpiresAt)
}

// IsExpired returns true if the session has expired.
func (s *Session) IsExpired() bool {
	return s.Status == SessionStatusActive && time.Now().After(s.ExpiresAt)
}