//go:build linux || freebsd
// +build linux freebsd

package core

import (
	"context"
	"time"
)

// RequestContext holds metadata about the request across layers
type RequestContext struct {
	// Request ID for logging
	RequestID string

	// Start of operation
	StartTime time.Time

	// Protocols used in the chain
	ProtocolChain []string

	// IP address to which was connected
	ConnectedIP string

	// IP version (4 or 6)
	IPVersion int

	// Number of attempts
	AttemptCount int

	// Context for cancellation
	Context context.Context
}

// NewRequestContext creates a new request context
func NewRequestContext(ctx context.Context, requestID string) *RequestContext {
	return &RequestContext{
		RequestID:     requestID,
		StartTime:     time.Now(),
		ProtocolChain: make([]string, 0),
		IPVersion:     0,
		AttemptCount:  0,
		Context:       ctx,
	}
}

// Duration returns the duration of operation
func (rc *RequestContext) Duration() time.Duration {
	return time.Since(rc.StartTime)
}

// AddProtocol adds a protocol to the chain
func (rc *RequestContext) AddProtocol(protocol string) {
	rc.ProtocolChain = append(rc.ProtocolChain, protocol)
}

// IsCancelled returns whether the context was cancelled
func (rc *RequestContext) IsCancelled() bool {
	select {
	case <-rc.Context.Done():
		return true
	default:
		return false
	}
}