// Package process provides process isolation and security enforcement for worker tasks.
// This file implements Network Micro-Segmentation enforcement hooks (Windows stub).
//go:build windows
// +build windows

package process

import (
	"fmt"
)

// NetworkPolicy defines network segmentation rules for a task
// (Windows stub - policy enforcement handled differently on Windows)
type NetworkPolicy struct {
	Mode             string
	AllowedEndpoints []string
	BlockedSubnets   []string
	DNSResolution    bool
	OutboundTraffic  bool
	InboundTraffic   bool
}

// DefaultNetworkPolicy returns a hardened default network policy (Windows stub)
func DefaultNetworkPolicy() NetworkPolicy {
	return NetworkPolicy{
		Mode:             "none",
		AllowedEndpoints: []string{},
		BlockedSubnets:   []string{},
		DNSResolution:    false,
		OutboundTraffic:  false,
		InboundTraffic:   false,
	}
}

// HIPAACompliantPolicy returns a network policy suitable for HIPAA compliance (Windows stub)
func HIPAACompliantPolicy(allowlist []string) NetworkPolicy {
	return NetworkPolicy{
		Mode:             "none",
		AllowedEndpoints: allowlist,
		BlockedSubnets:   []string{},
		DNSResolution:    false,
		OutboundTraffic:  false,
		InboundTraffic:   false,
	}
}

// Validate checks the network policy for security violations (Windows stub)
func (np *NetworkPolicy) Validate() error {
	// On Windows, only "none" mode is supported without additional tooling
	if np.Mode != "none" && np.Mode != "" {
		return fmt.Errorf("network mode %q not supported on Windows (use 'none' or implement via Windows Firewall)", np.Mode)
	}
	return nil
}

// ApplyNetworkPolicy applies network policy enforcement (Windows stub)
func ApplyNetworkPolicy(policy NetworkPolicy, baseArgs []string) ([]string, error) {
	if err := policy.Validate(); err != nil {
		return nil, fmt.Errorf("invalid network policy: %w", err)
	}

	// On Windows, just set the network mode
	args := append(baseArgs, "--network", policy.Mode)
	return args, nil
}

// SetupExternalFirewall sets up external firewall rules (Windows stub - no-op)
func SetupExternalFirewall(containerID string, policy NetworkPolicy) error {
	// Windows firewall integration would require PowerShell or netsh
	// For now, this is a no-op - rely on container runtime's default restrictions
	return nil
}

// NetworkPolicyFromSandbox creates a NetworkPolicy from sandbox configuration (Windows stub)
func NetworkPolicyFromSandbox(
	networkMode string,
	allowedEndpoints []string,
	blockedSubnets []string,
) NetworkPolicy {
	if networkMode == "" {
		networkMode = "none"
	}
	return NetworkPolicy{
		Mode:             networkMode,
		AllowedEndpoints: allowedEndpoints,
		BlockedSubnets:   blockedSubnets,
		DNSResolution:    false,
		OutboundTraffic:  false,
		InboundTraffic:   false,
	}
}