//go:build windows

package core

import (
	"context"
	"os/exec"

	"github.com/smart-mcp-proxy/mcpproxy-go/internal/shellwrap"
	"go.uber.org/zap"
)

// ProcessGroup represents a Windows process group for proper child process management
type ProcessGroup struct {
	PGID   int
	logger *zap.Logger
}

// createProcessGroupCommandFunc creates a custom CommandFunc for Windows systems
// Note: Windows process group management is different from Unix and requires different approaches
func createProcessGroupCommandFunc(client *Client, workingDir string, logger *zap.Logger) func(ctx context.Context, command string, env []string, args []string) (*exec.Cmd, error) {
	return func(ctx context.Context, command string, env []string, args []string) (*exec.Cmd, error) {
		cmd := exec.CommandContext(ctx, command, args...)
		cmd.Env = env

		// Set working directory if specified
		if workingDir != "" {
			cmd.Dir = workingDir
		}

		// TODO: Implement Windows-specific process group management
		// Windows uses Job Objects instead of process groups
		// For now, we'll use the standard command creation

		logger.Debug("Process group configuration applied (Windows)",
			zap.String("command", command),
			zap.Strings("args", shellwrap.RedactDockerArgs(args)),
			zap.String("working_dir", workingDir))

		if client != nil {
			client.processCmd = cmd
		}

		return cmd, nil
	}
}

// killProcessGroup terminates processes on Windows systems
// This is a simplified implementation for Windows compatibility
func killProcessGroup(pgid int, logger *zap.Logger, serverName string) error {
	// TODO: Implement proper Windows process termination
	// For now, this is a placeholder that does nothing
	// Windows process management would require Win32 API calls or Job Objects

	logger.Debug("Process group termination requested (Windows placeholder)",
		zap.String("server", serverName),
		zap.Int("pgid", pgid))

	return nil
}

// extractProcessGroupID extracts the process group ID from a running command on Windows
func extractProcessGroupID(cmd *exec.Cmd, logger *zap.Logger, serverName string) int {
	// Windows doesn't have Unix-style process groups
	// Return the PID as a fallback identifier
	if cmd == nil || cmd.Process == nil {
		return 0
	}

	logger.Debug("Process group ID extracted (Windows - using PID)",
		zap.String("server", serverName),
		zap.Int("pid", cmd.Process.Pid))

	return cmd.Process.Pid
}

// isProcessGroupAlive checks if processes are still running on Windows
func isProcessGroupAlive(pgid int) bool {
	// TODO: Implement Windows-specific process checking
	// For now, return false as a safe default
	return false
}
