# -*- perl -*-
#
# Copyright (C) 2014-2022 Alexis Bienvenüe <paamc@passoire.fr>
#
# This file is part of Auto-Multiple-Choice
#
# Auto-Multiple-Choice is free software: you can redistribute it
# and/or modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation, either version 2 of
# the License, or (at your option) any later version.
#
# Auto-Multiple-Choice is distributed in the hope that it will be
# useful, but WITHOUT ANY WARRANTY; without even the implied warranty
# of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Auto-Multiple-Choice.  If not, see
# <http://www.gnu.org/licenses/>.

use warnings;
use 5.012;

package AMC::Path;

BEGIN {
    use Exporter ();
    our ( $VERSION, @ISA, @EXPORT );

    @ISA    = qw(Exporter);
    @EXPORT = qw( &proj2abs &abs2proj );
}

sub abs2proj {
    my ( $surnoms, $fich ) = @_;
    if ( defined($fich) && $fich ) {

        $fich =~ s/\/{2,}/\//g;

      CLES:
        for
          my $s ( sort { length( $surnoms->{$b} ) <=> length( $surnoms->{$a} ) }
            grep { $_ && $surnoms->{$_} } ( keys %$surnoms ) )
        {
            my $rep = $surnoms->{$s};
            $rep .= "/" if ( $rep !~ /\/$/ );
            $rep =~ s/\/{2,}/\//g;
            if ( $fich =~ s/^\Q$rep\E\/*// ) {
                $fich = "$s/$fich";
                last CLES;
            }
        }

        return ($fich);
    } else {
        return ('');
    }
}

sub proj2abs {
    my ( $surnoms, $fich ) = @_;
    if ( defined($fich) ) {
        if ( $fich =~ /^\// ) {
            return ($fich);
        } else {
            $fich =~ s/^([^\/]*)//;
            my $code = $1;
            my $rep = $surnoms->{$code};
            if ( !$rep ) {
                if($code eq '%HOME') {
                    $rep = $ENV{HOME};
                } elsif($code eq '%PROJETS' && $surnoms->{'%PROJET'}) {
                    $rep = $surnoms->{'%PROJET'};
                    $rep =~ s:/[^/]+/?$::;
                } else {
                    $fich = $code . $fich;
                    $code = $surnoms->{''};
                    $rep = $surnoms->{$code};
                }
            }
            $rep .= "/" if ( $rep !~ /\/$/ );
            $rep .= $fich;
            $rep =~ s/\/{2,}/\//g;
            return ($rep);
        }
    } else {
        return ('');
    }
}

sub new {
    my (%o) = (@_);

    my $self = {
        projects_path => '',
        project_name  => '',
        home_dir      => '',
    };

    for my $k ( keys %o ) {
        $self->{$k} = $o{$k} if ( defined( $self->{$k} ) );
    }

    bless $self;

    return ($self);
}

sub set {
    my ( $self, %p ) = @_;
    for my $key ( keys %p ) {
        $self->{$key} = $p{$key};
    }
}

# builds a shorcuts list

sub shortcuts {
    my ( $self, $proj ) = @_;
    my %s = ();

    $proj = $self->{project_name} if ( !defined($proj) );
    $proj = '' if ( !defined($proj) );
    if ( $proj eq '<HOME>' ) {
        %s = ( '%HOME', $self->{home_dir} );
    } else {
        %s = (
            '%PROJETS' => $self->{projects_path},
            '%HOME', $self->{home_dir},
            '' => '%PROJETS',
        );
        if ($proj) {
            $s{'%PROJET'} = $self->{projects_path} . "/" . $proj;
            $s{''}        = '%PROJET';
        }
    }

    return ( \%s );
}

# expands shortcuts like %PROJET, %HOME from a file path

sub absolu {
    my ( $self, $f, $proj ) = @_;
    return ($f) if ( !defined($f) );
    $f = proj2abs( $self->shortcuts($proj), $f );
    return ($f);
}

# replaces some paths with their shortcuts in a file path

sub relatif {
    my ( $self, $f, $proj ) = @_;
    return ($f) if ( !defined($f) );
    return ( abs2proj( $self->shortcuts($proj), $f ) );
}

# get absolute filename, relative to project directory

sub absolu_base {
    my ( $self, $f ) = @_;
    return ($f) if ( !defined($f) );
    return File::Spec->rel2abs( $f, $self->absolu('%PROJET') );
}

sub relatif_base {
    my ( $self, $f, $proj ) = @_;
    return $self->relatif( $self->absolu_base($f), $proj );
}

1;
