//go:build windows

package core

import (
	"bufio"
	"fmt"
	"io"
	"os/exec"
	"regexp"
	"strconv"
	"strings"
	"syscall"
)

var ansiEscape = regexp.MustCompile(`\x1b\[[0-9;]*m`)

// procAttr returns platform-specific process attributes.
// On Windows, hides the console window.
func procAttr() *syscall.SysProcAttr {
	return &syscall.SysProcAttr{
		HideWindow:    true,
		CreationFlags: 0x08000000, // CREATE_NO_WINDOW
	}
}

// killProcessByName kills all processes with the given name.
func killProcessByName(name string, onKill func(pid int)) {
	// Use tasklist to find processes
	out, err := exec.Command("tasklist", "/FI", fmt.Sprintf("IMAGENAME eq %s.exe", name), "/FO", "CSV", "/NH").Output()
	if err != nil {
		return
	}

	for _, line := range strings.Split(string(out), "\n") {
		line = strings.TrimSpace(line)
		if line == "" || strings.Contains(line, "No tasks") {
			continue
		}
		// CSV format: "name.exe","PID","Session Name","Session#","Mem Usage"
		parts := strings.Split(line, ",")
		if len(parts) < 2 {
			continue
		}
		pidStr := strings.Trim(parts[1], "\" ")
		pid, err := strconv.Atoi(pidStr)
		if err != nil {
			continue
		}
		if onKill != nil {
			onKill(pid)
		}
		_ = exec.Command("taskkill", "/F", "/T", "/PID", pidStr).Run()
	}
}

// scanPipe reads lines from a pipe and calls handler for each.
// ANSI escape codes are stripped before passing to handler.
func scanPipe(r io.Reader, handler func(string)) {
	if r == nil {
		return
	}
	scanner := bufio.NewScanner(r)
	for scanner.Scan() {
		line := ansiEscape.ReplaceAllString(scanner.Text(), "")
		if line != "" {
			handler(line)
		}
	}
}