//go:build windows

package main

import (
	"os/exec"
	"strconv"
	"strings"
	"syscall"

	"hamlog/internal/applog"

	wruntime "github.com/wailsapp/wails/v2/pkg/runtime"
)

// hideConsole keeps a helper process from flashing a console window. OpsLog is
// a GUI application, and every `tasklist`/`taskkill`/`powershell` it runs would
// otherwise blink a black box in front of the operator mid-QSO.
func hideConsole(cmd *exec.Cmd) {
	cmd.SysProcAttr = &syscall.SysProcAttr{HideWindow: true, CreationFlags: 0x08000000} // CREATE_NO_WINDOW
}

// runningProcessNames returns the set of lowercase executable names currently
// running, via the Windows `tasklist`. Best effort — on failure the set is
// empty (we then just attempt to launch, which is acceptable).
func runningProcessNames() map[string]bool {
	out := map[string]bool{}
	cmd := exec.Command("tasklist", "/FO", "CSV", "/NH")
	hideConsole(cmd)
	data, err := cmd.Output()
	if err != nil {
		applog.Printf("autostart: tasklist failed: %v", err)
		return out
	}
	for _, line := range strings.Split(string(data), "\n") {
		line = strings.TrimSpace(line)
		if line == "" {
			continue
		}
		// CSV row: "image.exe","PID",... — take the first quoted field.
		field := line
		if i := strings.Index(line[1:], "\""); i >= 0 && strings.HasPrefix(line, "\"") {
			field = line[1 : i+1]
		}
		field = strings.Trim(field, "\"")
		if field != "" {
			out[strings.ToLower(field)] = true
		}
	}
	return out
}

// closeProcess asks the process to close. `taskkill` without /F sends WM_CLOSE,
// so WSJT-X and friends get to save their state instead of being shot.
func closeProcess(pid int) ([]byte, error) {
	cmd := exec.Command("taskkill", "/PID", strconv.Itoa(pid))
	hideConsole(cmd)
	return cmd.CombinedOutput()
}

// executableFilters is what the "choose a program" dialog offers. Windows knows
// a program by its extension.
func executableFilters() []wruntime.FileFilter {
	return []wruntime.FileFilter{
		{DisplayName: "Programs (*.exe;*.bat;*.cmd)", Pattern: "*.exe;*.bat;*.cmd"},
		{DisplayName: "All files (*.*)", Pattern: "*.*"},
	}
}