//go:build !windows

package runtime

import (
	"os"
	"os/exec"
)

type execManagedProcess struct {
	cmd *exec.Cmd
}

func startManagedProcess(command ProcessCommand, files managedProcessFiles, _ string) (managedProcess, error) {
	cmd := exec.Command(command.Args[0], command.Args[1:]...)
	cmd.Dir = command.WorkDir
	cmd.Env = os.Environ()
	for key, value := range command.Env {
		cmd.Env = append(cmd.Env, key+"="+value)
	}
	cmd.Stdout = files.stdout
	cmd.Stderr = files.stderr
	if err := cmd.Start(); err != nil {
		return nil, err
	}
	return &execManagedProcess{cmd: cmd}, nil
}

func requestManagedProcessStop(identity ProcessIdentity) error {
	process, err := os.FindProcess(identity.PID)
	if err != nil {
		return err
	}
	return process.Kill()
}

func forceManagedProcessStop(identity ProcessIdentity) error {
	return requestManagedProcessStop(identity)
}

func (process *execManagedProcess) PID() int {
	return process.cmd.Process.Pid
}

func (process *execManagedProcess) TargetPID() int {
	return process.PID()
}

func (process *execManagedProcess) Wait() (int, error) {
	err := process.cmd.Wait()
	if process.cmd.ProcessState == nil {
		return -1, err
	}
	return process.cmd.ProcessState.ExitCode(), err
}

func (process *execManagedProcess) Kill() error {
	return process.cmd.Process.Kill()
}