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#!/usr/bin/perl

# 在windows获取当前的桌面壁纸
# See also: https://www.winhelponline.com/blog/find-current-wallpaper-file-path-windows-10/

use v5.26;
use strict;
use utf8;
use autodie;
use warnings;
use Encode qw(decode encode);
use experimental 'smartmatch'; # 忽略智能匹配的错误警告
use Getopt::Long qw(GetOptions);
use File::Copy;
use File::Spec::Functions;
use File::Basename;
use Term::ANSIColor;
use Data::Dumper;

# my $cmd = $ENV{COMSPEC}; 可能不存在此环境变量
my $reg = $ENV{SYSTEMROOT} . '\System32\reg.exe'; # 通过命令行指定reg.exe的位置
my $cmd = $ENV{SYSTEMROOT} . '\System32\cmd.exe'; # cmd.exe路径
my $open; # 是否打开
my $help;

GetOptions(
  "reg=s"   => \$reg, 
  "open"    => \$open, 
  "cmd=s"   => \$cmd,
  "help"    => \$help
);

if(defined($help)){
  print color('green');
  say encode("utf-8", "
  \$ awinwp [reg] [cmd] [open] [help]
  --reg \t指定reg.exe路径\tdefault: %SystemRoot%\\System32\\reg.exe
  --cmd \t指定cmd.exe路径\tdefault: %SystemRoot%\\system32\\cmd.exe
  --open\t打开WallPaper \tdefault: false
  ");
  exit;
}

$reg =~ s/([\\\p{space}])/\\$1/g;
$cmd =~ s/([\\\p{space}])/\\$1/g;

# 查看reg.exe是否存在
unless(-e $reg) {
  print color('red');
  say encode("utf-8", "[reg.exe]路径不存在: $reg");
  exit;
}

# 查看cmd.exe是否存在
if(defined($open) && !(-e $cmd)) {
  print color('red');
  say encode("utf-8", "[cmd.exe]路径不存在: $cmd");
  exit;
}

# 查询注册表的命令
# See also: https://docs.microsoft.com/en-us/windows-server/administration/windows-commands/reg-query
my $query = 'HKEY_CURRENT_USER\Control Panel\Desktop' =~ s/([\\\p{space}])/\\$1/gr;
my @lines = `$reg QUERY $query //v WallPaper`;

# 提取出值
for(@lines) {
  if(/WallPaper/){
    s/WallPaper    REG_SZ//;
    s/^\s+|\s+$//g;
    if($_) {
      say $_;
      fileparse_set_fstype("MSWin32");
      my($filename) = fileparse($_);
      my $newPath = catfile("./", $filename);
      copy($_, $newPath); # 拷贝到当前目录
      system "$cmd /C $filename && explorer ." if(defined($open));
    }
  }
}

perl 在windows上获取当前桌面壁纸