package app

import (
	"fmt"
	"log"
	"os/exec"
)

func pressDiscordMuteHotkey() error {
	script := `
$ErrorActionPreference = "Stop"

Add-Type @"
using System;
using System.Runtime.InteropServices;
public static class Win32 {
  [StructLayout(LayoutKind.Sequential)]
  public struct RECT {
    public int Left;
    public int Top;
    public int Right;
    public int Bottom;
  }
  [DllImport("user32.dll")]
  public static extern bool GetWindowRect(IntPtr hWnd, out RECT lpRect);
  [DllImport("user32.dll")]
  public static extern bool SetCursorPos(int X, int Y);
  [DllImport("user32.dll")]
  public static extern void mouse_event(uint dwFlags, uint dx, uint dy, uint dwData, UIntPtr dwExtraInfo);
}
"@

function Click-WindowCenter($p) {
  if ($null -eq $p) { return }
  $hWnd = [IntPtr]$p.MainWindowHandle
  if ($hWnd -eq [IntPtr]::Zero) { return }

  $rect = New-Object 'Win32+RECT'
  if (-not [Win32]::GetWindowRect($hWnd, [ref]$rect)) { return }

  $x = [int](($rect.Left + $rect.Right) / 2)
  $y = [int](($rect.Top + $rect.Bottom) / 2)
  [Win32]::SetCursorPos($x, $y) | Out-Null
  Start-Sleep -Milliseconds 50
  [Win32]::mouse_event(0x0002, 0, 0, 0, [UIntPtr]::Zero)
  [Win32]::mouse_event(0x0004, 0, 0, 0, [UIntPtr]::Zero)
  Start-Sleep -Milliseconds 100
}

function Get-DiscordWindows {
  $windows = foreach ($p in Get-Process) {
    $title = ($p.MainWindowTitle | Out-String).Trim()
    if (-not $title) { continue }
    if (-not $title.ToLower().Contains('discord')) { continue }
    $p
  }
  if (-not $windows) { return @() }
  return $windows
}

function Get-BestDiscordWindow {
  $windows = Get-DiscordWindows
  if (-not $windows -or $windows.Count -eq 0) { return $null }

  $browserKeywords = @('google chrome', 'microsoft edge', 'mozilla firefox', 'brave', 'opera')
  $ranked = $windows | Sort-Object {
    $title = ($_.MainWindowTitle | Out-String).Trim().ToLower()
    $score = 0
    foreach ($keyword in $browserKeywords) {
      if ($title.Contains($keyword)) { $score += 10 }
    }
    if ($title -match '^\(\d+\)\s*discord') { $score += 20 }
    if ($title.Contains('discord')) { $score += 5 }
    $score
  } -Descending

  return $ranked | Select-Object -First 1
}

function Get-VRChatWindow {
  $windows = Get-Process | Where-Object {
    $_.MainWindowTitle -and (
      $_.MainWindowTitle -eq 'VRChat' -or $_.MainWindowTitle.ToLower().StartsWith('vrchat ')
    )
  }
  if (-not $windows) { return $null }
  return $windows | Sort-Object { $_.MainWindowHandle } -Descending | Select-Object -First 1
}

function Activate-Window($p) {
  if ($null -eq $p) { return }
  $wshell = New-Object -ComObject WScript.Shell
  try { $null = $wshell.AppActivate($p.Id) } catch {}
  Start-Sleep -Milliseconds 200
  Click-WindowCenter $p
}

$discord = Get-BestDiscordWindow
if ($null -eq $discord) { exit 2 }

Activate-Window $discord
$wshell = New-Object -ComObject WScript.Shell
Start-Sleep -Milliseconds 200
$wshell.SendKeys('^+m')
Start-Sleep -Milliseconds 200

$vrchat = Get-VRChatWindow
if ($null -ne $vrchat) {
  Activate-Window $vrchat
}
`

	cmd := exec.Command("powershell", "-NoProfile", "-ExecutionPolicy", "Bypass", "-Command", script)
	out, err := cmd.CombinedOutput()
	if len(out) > 0 {
		log.Printf("discord mute output: %s", string(out))
	}
	if err != nil {
		return fmt.Errorf("discord mute failed: %w", err)
	}
	return nil
}