#!/usr/bin/perl -w

my $Is_VMS = $^OS_NAME eq 'VMS';


use Config < qw|config_keys config_value|;
use Cwd;
use File::Path;
use File::Basename;
use File::Spec;

use Test::More tests => 51;

BEGIN { use_ok( 'ExtUtils::Installed' ) }

my $mandirs = ! ! config_value("man1direxp") + ! ! config_value("man3direxp");

# saves having to qualify package name for class methods
my $ei = bless( \%(), 'ExtUtils::Installed' );

# Make sure meta info is available
$ei->{+':private:'}->{+Config} = \%:<
  @+: map { @($_ => config_value($_)) }, config_keys();
$ei->{':private:'}->{+INC} = \$^INCLUDE_PATH;

# _is_prefix
ok( $ei->_is_prefix('foo/bar', 'foo'),
        '_is_prefix() should match valid path prefix' );
ok( !$ei->_is_prefix('\foo\bar', '\bar'),
        '... should not match wrong prefix' );

# _is_type
ok( $ei->_is_type(0, 'all'), '_is_type() should be true for type of "all"' );

foreach my $path (qw( man1dir man3dir )) {
    SKIP: do {
        my $dir = config_value($path.'exp');
        skip("no man directory $path on this system", 2 ) unless $dir;

        my $file = $dir . '/foo';
        ok( $ei->_is_type($file, 'doc'),   "... should find doc file in $path" );
        ok( !$ei->_is_type($file, 'prog'), "... but not prog file in $path" );
    };
}

# VMS 5.6.1 doesn't seem to have $Config{prefixexp}
my $prefix = config_value("prefix") || config_value("prefixexp");

# You can concatenate /foo but not foo:, which defaults in the current
# directory
$prefix = VMS::Filespec::unixify($prefix) if $Is_VMS;

# ActivePerl 5.6.1/631 has $Config{prefixexp} as 'p:' for some reason
$prefix = config_value("prefix") if $prefix eq 'p:' && $^OS_NAME eq 'MSWin32';

ok( $ei->_is_type( File::Spec->catfile($prefix, 'bar'), 'prog'),
        "... should find prog file under $prefix" );

SKIP: do {
    skip('no man directories on this system', 1) unless $mandirs;
    is( $ei->_is_type('bar', 'doc'), 0,
	'... should not find doc file outside path' );
};

ok( !$ei->_is_type('bar', 'prog'),
        '... nor prog file outside path' );
ok( !$ei->_is_type('whocares', 'someother'), '... nor other type anywhere' );

# _is_under
ok( $ei->_is_under('foo'), '_is_under() should return true with no dirs' );

my @under = qw( boo bar baz );
ok( !$ei->_is_under('foo', < @under), '... should find no file not under dirs');
ok( $ei->_is_under('baz', < @under),  '... should find file under dir' );


rmtree 'auto/FakeMod';
ok( mkpath('auto/FakeMod') );
END { rmtree 'auto' }

ok(open(my $packlist, ">", 'auto/FakeMod/.packlist'));
print $packlist, 'list';
close $packlist;

ok(open(my $fakemod, ">", 'auto/FakeMod/FakeMod.pm'));

print $fakemod, <<'FAKE';
package FakeMod;
use vars qw( $VERSION );
$VERSION = '1.1.1';
1;
FAKE

close $fakemod;

my $fake_mod_dir = File::Spec->catdir(cwd(), 'auto', 'FakeMod');

# Do the same thing as the last block, but with overrides for
# %Config and $^INCLUDE_PATH.
do {
    my $config_override = \%:<
      @+: map { @: $_ => Config::config_value($_) },
      Config::config_keys();
    $config_override->{+archlibexp} = cwd();
    $config_override->{+sitearchexp} = $fake_mod_dir;
    $config_override->{+version} = 'fake_test_version';

    my @inc_override = @(< $^INCLUDE_PATH, $fake_mod_dir);

    my $realei = ExtUtils::Installed->new(
        'config_override' => $config_override,
        'inc_override' => \@inc_override,
    );
    isa_ok( $realei, 'ExtUtils::Installed' );
    isa_ok( $realei->{Perl}->{?packlist}, 'ExtUtils::Packlist' );
    is( $realei->{Perl}->{?version}, 'fake_test_version',
        'new(config_override => HASH) overrides %Config' );

    ok( exists $realei->{FakeMod}, 'new() with overrides should find modules with .packlists');
    isa_ok( $realei->{FakeMod}->{?packlist}, 'ExtUtils::Packlist' );
    is( $realei->{FakeMod}->{?version}, '1.1.1',
	'... should find version in modules' );
};

push $^INCLUDE_PATH, $fake_mod_dir;

# Check if extra_libs works.
do {
    my $realei = ExtUtils::Installed->new(
        'extra_libs' => \@( cwd() ),
    );
    isa_ok( $realei, 'ExtUtils::Installed' );
    isa_ok( $realei->{Perl}->{?packlist}, 'ExtUtils::Packlist' );
    ok( exists $realei->{FakeMod}, 
        'new() with extra_libs should find modules with .packlists');
    
    #{ use Data::Dumper; local $realei->{':private:'}{Config};
    #  warn Dumper($realei); }
    
    isa_ok( $realei->{FakeMod}->{?packlist}, 'ExtUtils::Packlist' );
    is( $realei->{FakeMod}->{?version}, '1.1.1',
	'... should find version in modules' );
};

# modules
$ei->{+$_} = 1 for qw( abc def ghi );
is( join(' ', $ei->modules()), 'abc def ghi',
    'modules() should return sorted keys' );

# This didn't work for a long time due to a sort in scalar context oddity.
is( (nelems $ei->modules), 3,    'modules() in scalar context' );

# files
$ei->{+goodmod} = \%(
        packlist => \%(
                (config_value("man1direxp") ??
                    (File::Spec->catdir(config_value("man1direxp"), 'foo') => 1) !!
                        ()),
                (config_value("man3direxp") ??
                    (File::Spec->catdir(config_value("man3direxp"), 'bar') => 1) !!
                        ()),
                File::Spec->catdir($prefix, 'foobar') => 1,
                foobaz  => 1,
        ),
);

dies_like( sub { $ei->files('badmod') },
           qr/badmod is not installed/,'files() should croak given bad modname');
dies_like( sub { $ei->files('goodmod', 'badtype' ) },
           qr/type must be/,'files() should croak given bad type' );

my @files;
SKIP: do {
    skip('no man directory man1dir on this system', 2)
      unless config_value("man1direxp");
    @files = $ei->files('goodmod', 'doc', config_value("man1direxp"));
    is( scalar nelems @files, 1, '... should find doc file under given dir' );
    is( nelems(grep { m/foo$/ }, @files), 1, '... checking file name' );
};
SKIP: do {
    skip('no man directories on this system', 1) unless $mandirs;
    @files = $ei->files('goodmod', 'doc');
    is( scalar nelems @files, $mandirs, '... should find all doc files with no dir' );
};

@files = $ei->files('goodmod', 'prog', 'fake', 'fake2');
is( scalar nelems @files, 0, '... should find no doc files given wrong dirs' );
@files = $ei->files('goodmod', 'prog');
is( scalar nelems @files, 1, '... should find doc file in correct dir' );
like( @files[0], qr/foobar[>\]]?$/, '... checking file name' );
@files = $ei->files('goodmod');
is( scalar nelems @files, 2 + $mandirs, '... should find all files with no type specified' );
my %dirnames = %( < @+: map { @: lc($_) => dirname($_) }, @files );

# directories
my @dirs = $ei->directories('goodmod', 'prog', 'fake');
is( scalar nelems @dirs, 0, 'directories() should return no dirs if no files found' );

SKIP: do {
    skip('no man directories on this system', 1) unless $mandirs;
    @dirs = $ei->directories('goodmod', 'doc');
    is( scalar nelems @dirs, $mandirs, '... should find all files files() would' );
};
@dirs = $ei->directories('goodmod');
is( scalar nelems @dirs, 2 + $mandirs, '... should find all files files() would, again' );
@files = sort map { exists %dirnames{lc($_)} ?? %dirnames{?lc($_)} !! '' }, @files;
is( join(' ', @files), join(' ', @dirs), '... should sort output' );

# directory_tree
my $expectdirs =
       ($mandirs == 2) &&
       (dirname(config_value("man1direxp")) eq dirname(config_value("man3direxp")))
       ?? 3 !! 2;

SKIP: do {
    skip('no man directories on this system', 1) unless $mandirs;
    @dirs = $ei->directory_tree('goodmod', 'doc', config_value("man1direxp") ??
       dirname(config_value("man1direxp")) !! dirname(config_value("man3direxp")));
    is( scalar nelems @dirs, $expectdirs,
        'directory_tree() should report intermediate dirs to those requested' );
};

my $fakepak = Fakepak->new(102);

$ei->{+yesmod} = \%(
        version         => 101,
        packlist        => $fakepak,
);

# these should all croak
foreach my $sub (qw( validate packlist version )) {
    dies_like( sub { $ei->?$sub('nomod') },
               qr/nomod is not installed/,
               "$sub() should croak when asked about uninstalled module" );
}

# validate
is( $ei->validate('yesmod'), 'validated',
        'validate() should return results of packlist validate() call' );

# packlist
is( ${ $ei->packlist('yesmod') }, 102,
        'packlist() should report installed mod packlist' );

# version
is( $ei->version('yesmod'), 101,
        'version() should report installed mod version' );


package Fakepak;

sub new {
    my $class = shift;
    bless(\(my $scalar = shift), $class);
}

sub validate {
    return 'validated'
}