package CPAN::Mirrored::By;

sub new { 
    my($self,@arg) = @_;
    bless [@arg], $self;
}
sub continent { shift->[0] }
sub country { shift->[1] }
sub url { shift->[2] }

package CPAN::FirstTime;

use strict;
use ExtUtils::MakeMaker qw(prompt);
use FileHandle ();
use File::Path ();
use vars qw($VERSION);
$VERSION = substr q$Revision: 1.20 $, 10;

=head1 NAME

CPAN::FirstTime - Utility for CPAN::Config file Initialization

=head1 SYNOPSIS

CPAN::FirstTime::init()

=head1 DESCRIPTION

The init routine asks a few questions and writes a CPAN::Config
file. Nothing special.

=cut


sub init {
    my($configpm) = @_;
    use Config;
    require CPAN::Nox;
    eval {require CPAN::Config;};
    $CPAN::Config ||= {};
    local($/) = "\n";
    local($\) = "";

    my($ans,$default,$local,$cont,$url,$expected_size);
    
    #
    # Files, directories
    #

    print qq{
The CPAN module needs a directory of its own to cache important
index files and maybe keep a temporary mirror of CPAN files. This may
be a site-wide directory or a personal directory.
};

    my $cpan_home = $CPAN::Config->{cpan_home} || MM->catdir($ENV{HOME}, ".cpan");
    if (-d $cpan_home) {
	print qq{

I see you already have a  directory
    $cpan_home
Shall we use it as the general CPAN build and cache directory?

};
    } else {
	print qq{

First of all, I\'d like to create this directory. Where?

};
    }

    $default = $cpan_home;
    while ($ans = prompt("CPAN build and cache directory?",$default)) {
	File::Path::mkpath($ans); # dies if it can't
	if (-d $ans && -w _) {
	    last;
	} else {
	    warn "Couldn't find directory $ans
  or directory is not writable. Please retry.\n";
	}
    }
    $CPAN::Config->{cpan_home} = $ans;
    
    print qq{

If you want, I can keep the source files after a build in the cpan
home directory. If you choose so then future builds will take the
files from there. If you don\'t want to keep them, answer 0 to the
next question.

};

    $CPAN::Config->{keep_source_where} = MM->catdir($CPAN::Config->{cpan_home},"sources");
    $CPAN::Config->{build_dir} = MM->catdir($CPAN::Config->{cpan_home},"build");

    #
    # Cache size, Index expire
    #

    print qq{

How big should the disk cache be for keeping the build directories
with all the intermediate files?

};

    $default = $CPAN::Config->{build_cache} || 10;
    $ans = prompt("Cache size for build directory (in MB)?", $default);
    $CPAN::Config->{build_cache} = $ans;

    # XXX This the time when we refetch the index files (in days)
    $CPAN::Config->{'index_expire'} = 1;

    #
    # External programs
    #

    print qq{

The CPAN module will need a few external programs to work
properly. Please correct me, if I guess the wrong path for a program.
Don\'t panic if you do not have some of them, just press ENTER for
those.

};

    my(@path) = split /$Config{'path_sep'}/, $ENV{'PATH'};
    my $prog;
    for $prog (qw/gzip tar unzip make lynx ncftp ftp/){
	my $path = $CPAN::Config->{$prog} || "";
	if (MM->file_name_is_absolute($path)) {
	    warn "Warning: configured $path does not exist\n" unless -e $path;
	    $path = "";
	} else {
	    $path = '';
	}
	$path ||= find_exe($prog,[@path]);
	warn "Warning: $prog not found in PATH\n" unless -e $path;
	$ans = prompt("Where is your $prog program?",$path) || $path;
	$CPAN::Config->{$prog} = $ans;
    }
    my $path = $CPAN::Config->{'pager'} || 
	$ENV{PAGER} || find_exe("less",[@path]) || 
	    find_exe("more",[@path]) || "more";
    $ans = prompt("What is your favorite pager program?",$path);
    $CPAN::Config->{'pager'} = $ans;
    $path = $CPAN::Config->{'shell'};
    if (MM->file_name_is_absolute($path)) {
	warn "Warning: configured $path does not exist\n" unless -e $path;
	$path = "";
    }
    $path ||= $ENV{SHELL};
    $ans = prompt("What is your favorite shell?",$path);
    $CPAN::Config->{'shell'} = $ans;

    #
    # Arguments to make etc.
    #

    print qq{

Every Makefile.PL is run by perl in a separate process. Likewise we
run \'make\' and \'make install\' in processes. If you have any parameters
\(e.g. PREFIX, INSTALLPRIVLIB, UNINST or the like\) you want to pass to
the calls, please specify them here.

If you don\'t understand this question, just press ENTER.

};

    $default = $CPAN::Config->{makepl_arg} || "";
    $CPAN::Config->{makepl_arg} =
	prompt("Parameters for the 'perl Makefile.PL' command?",$default);
    $default = $CPAN::Config->{make_arg} || "";
    $CPAN::Config->{make_arg} = prompt("Parameters for the 'make' command?",$default);

    $default = $CPAN::Config->{make_install_arg} || $CPAN::Config->{make_arg} || "";
    $CPAN::Config->{make_install_arg} =
	prompt("Parameters for the 'make install' command?",$default);

    #
    # Alarm period
    #

    print qq{

Sometimes you may wish to leave the processes run by CPAN alone
without caring about them. As sometimes the Makefile.PL contains
question you\'re expected to answer, you can set a timer that will
kill a 'perl Makefile.PL' process after the specified time in seconds.

If you set this value to 0, these processes will wait forever. This is
the default and recommended setting.

};

    $default = $CPAN::Config->{inactivity_timeout} || 0;
    $CPAN::Config->{inactivity_timeout} =
	prompt("Timeout for inacivity during Makefile.PL?",$default);


    #
    # MIRRORED.BY
    #

    $local = 'MIRRORED.BY';
    $local = MM->catfile($CPAN::Config->{keep_source_where},"MIRRORED.BY") unless -f $local;
    if (@{$CPAN::Config->{urllist}||[]}) {
	print qq{
I found a list of URLs in CPAN::Config and will use this.
You can change it later with the 'o conf' command.

}
    } elsif (
	     -s $local
	     &&
	     -M $local < 30
	    ) {
	read_mirrored_by($local);
    } else {
	$CPAN::Config->{urllist} ||= [];
	while (! @{$CPAN::Config->{urllist}}) {
	    my($input) = prompt(qq{
We need to know the URL of your favorite CPAN site.
Please enter it here:});
	    $input =~ s/\s//g;
	    next unless $input;
	    my($wanted) = "MIRRORED.BY";
	    print qq{
Testing "$input" ...
};
	    push @{$CPAN::Config->{urllist}}, $input;
	    CPAN::FTP->localize($wanted,$local,"force");
	    if (-s $local) {
		print qq{
"$input" seems to work
};
	    } else {
		my $ans = prompt(qq{$input doesn\'t seem to work. Keep it in the list?},"n");
		last unless $ans =~ /^n/i;
		pop @{$CPAN::Config->{urllist}};
	    }
	}
    }

    unless (@{$CPAN::Config->{'wait_list'}||[]}) {
	print qq{

WAIT support is available as a Plugin. You need the CPAN::WAIT module
to actually use it.  But we need to know your favorite WAIT server. If
you don\'t know a WAIT server near you, just press ENTER.

};
	$default = "wait://ls6.informatik.uni-dortmund.de:1404";
	$ans = prompt("Your favorite WAIT server?\n  ",$default);
	push @{$CPAN::Config->{'wait_list'}}, $ans;
    }

    print qq{

If you\'re accessing the net via proxies, you can specify them in the
CPAN configuration or via environment variables. The variable in
the \$CPAN::Config takes precedence.

};

    for (qw/ftp_proxy http_proxy no_proxy/) {
	$default = $CPAN::Config->{$_} || $ENV{$_};
	$CPAN::Config->{$_} = prompt("Your $_?",$default);
    }

    # We don't ask that now, it will be noticed in time, won't it?
    $CPAN::Config->{'inhibit_startup_message'} = 0;
    $CPAN::Config->{'getcwd'} = 'cwd';

    print "\n\n";
    CPAN::Config->commit($configpm);
}

sub find_exe {
    my($exe,$path) = @_;
    my($dir);
    #warn "in find_exe exe[$exe] path[@$path]";
    for $dir (@$path) {
	my $abs = MM->catfile($dir,$exe);
	if (MM->maybe_command($abs)) {
	    return $abs;
	}
    }
}

sub read_mirrored_by {
    my($local) = @_;
    my(%all,$url,$expected_size,$default,$ans,$host,$dst,$country,$continent,@location);
    my $fh = FileHandle->new;
    $fh->open($local) or die "Couldn't open $local: $!";
    while (<$fh>) {
	($host) = /^([\w\.\-]+)/ unless defined $host;
	next unless defined $host;
	next unless /\s+dst_(dst|location)/;
	/location\s+=\s+\"([^\"]+)/ and @location = (split /\s*,\s*/, $1) and
	    ($continent, $country) = @location[-1,-2];
	$continent =~ s/\s\(.*//;
	/dst_dst\s+=\s+\"([^\"]+)/  and $dst = $1;
	next unless $host && $dst && $continent && $country;
	$all{$continent}{$country}{$dst} = CPAN::Mirrored::By->new($continent,$country,$dst);
	undef $host;
	$dst=$continent=$country="";
    }
    $fh->close;
    $CPAN::Config->{urllist} ||= [];
    if ($expected_size = @{$CPAN::Config->{urllist}}) {
	for $url (@{$CPAN::Config->{urllist}}) {
	    # sanity check, scheme+colon, not "q" there:
	    next unless $url =~ /^\w+:\/./;
	    $all{"[From previous setup]"}{"found URL"}{$url}=CPAN::Mirrored::By->new('[From previous setup]','found URL',$url);
	}
	$CPAN::Config->{urllist} = [];
    } else {
	$expected_size = 6;
    }
    
    print qq{

Now we need to know, where your favorite CPAN sites are located. Push
a few sites onto the array (just in case the first on the array won\'t
work). If you are mirroring CPAN to your local workstation, specify a
file: URL.

You can enter the number in front of the URL on the next screen, a
file:, ftp: or http: URL, or "q" to finish selecting.

};

    $ans = prompt("Press RETURN to continue");
    my $other;
    $ans = $other = "";
    my(%seen);
    
    my $pipe = -t *STDIN ? "| $CPAN::Config->{'pager'}" : ">/dev/null";
    while () {
	my(@valid,$previous_best);
	my $fh = FileHandle->new;
	$fh->open($pipe);
	{
	    my($cont,$country,$url,$item);
	    my(@cont) = sort keys %all;
	    for $cont (@cont) {
		$fh->print("    $cont\n");
		for $country (sort {lc $a cmp lc $b} keys %{$all{$cont}}) {
		    for $url (sort {lc $a cmp lc $b} keys %{$all{$cont}{$country}}) {
			my $t = sprintf(
					"      %-18s (%2d) %s\n",
					$country,
					++$item,
					$url
				       );
			if ($cont =~ /^\[/) {
			    $previous_best ||= $item;
			}
			push @valid, $all{$cont}{$country}{$url};
			$fh->print($t);
		    }
		}
	    }
	}
	$fh->close;
	$previous_best ||= 1;
	$default =
	    @{$CPAN::Config->{urllist}} >= $expected_size ? "q" : $previous_best;
	$ans = prompt(
		      "\nSelect an$other ftp or file URL or a number (q to finish)",
		      $default
		     );
	my $sel;
	if ($ans =~ /^\d/) {
	    my $this = $valid[$ans-1];
	    my($con,$cou,$url) = ($this->continent,$this->country,$this->url);
	    push @{$CPAN::Config->{urllist}}, $url unless $seen{$url}++;
	    delete $all{$con}{$cou}{$url};
	    #	    print "Was a number [$ans] con[$con] cou[$cou] url[$url]\n";
	} elsif (@{$CPAN::Config->{urllist}} && $ans =~ /^q/i) {
	    last;
	} else {
	    $ans =~ s|/?$|/|; # has to end with one slash
	    $ans = "file:$ans" unless $ans =~ /:/; # without a scheme is a file:
	    if ($ans =~ /^\w+:\/./) {
		push @{$CPAN::Config->{urllist}}, $ans unless $seen{$ans}++;
	    } else {
		print qq{"$ans" doesn\'t look like an URL at first sight.
I\'ll ignore it for now. You can add it to lib/CPAN/Config.pm
later and report a bug in my Makefile.PL to me (andreas koenig).
Thanks.\n};
	    }
	}
	$other ||= "other";
    }
}

1;
