#!/usr/bin/perl -w
###############################################################################
=pod

=head1 NAME

mig-convert 

Attempts to invoke B<csv2sql> on the .utf8.clean version of the specified
tracked file, creating either [file].utf8.clean.stage.sql or
<parent table>_stage.sql depending on whether the file has been linked to a
parent table within the migration schema or not.

If given no other arguments, the invocation will lool like

=over 5

csv2sql --config scripts/clean.conf --add-x-migrate --schema <MIGSCHEMA> [--parent <PARENT TABLE>] --outfile <[<FILE>.utf8.clean.stage.sql]|[parent_table_stage.sql]> <FILE>.utf8.clean

=back

otherwise, the arguments will be passed through like so

=over 5

csv2sql [other arguments...] --schema <MIGSCHEMA> [--parent <PARENT TABLE>] --outfile <[<FILE>.utf8.clean.stage.sql]|[parent_table_stage.sql]> <FILE>.utf8.clean

=back

=head1 SYNOPSIS

B<mig-convert> <file> [other arguments...]

=cut

###############################################################################

use strict;
use Switch;
use Env qw(
    HOME PGHOST PGPORT PGUSER PGDATABASE MIGSCHEMA
    MIGBASEWORKDIR MIGBASEGITDIR MIGGITDIR MIGWORKDIR
);
use Pod::Usage;
use DBI;
use Cwd 'abs_path';
use FindBin;
my $mig_bin = "$FindBin::Bin/";
use lib "$FindBin::Bin/";
use Mig;

pod2usage(-verbose => 2) if ! $ARGV[0] || $ARGV[0] eq '--help';

Mig::die_if_no_env_migschema();
Mig::die_if_mig_tracking_table_does_not_exist();

my $file = abs_path($ARGV[0]);
if ($file =~ /^$MIGBASEWORKDIR/) {
    call_convert_csv(@ARGV);
} else {
    print "File falls outside of MIGWORKDIR ($MIGWORKDIR): $file\n";
}

exit 0;

###############################################################################

sub call_convert_csv {
    my $file = abs_path(shift);
    my @args = @_;

    my $stage_sql_filename;
    my $tracked_file_id = Mig::check_for_tracked_file($file);
    if ($tracked_file_id) {
        my $data = Mig::status_this_file($file);

        if (! $data->{'utf8_filename'}) {
            die "mig-iconv or mig-skip-iconv needed for UTF8 version of file: $file\n";
        }

        if (! $data->{'clean_filename'}) {
            die "mig-clean or mig-skip-clean needed for .clean version of file: $file\n";
        }

        my $clean_file = $data->{'clean_filename'};
        if (! -e $clean_file) {
            die "missing file: $clean_file\n";
        }

        print "converting tracked file: $file\n";

        if (scalar(@args) == 0) {
            @args = (
                 '--config'
                ,'scripts/clean.conf'
                ,'--add-x-migrate'
            );
        }
        push @args, '--use-no-headers-file';
        push @args, '--schema';
        push @args, $MIGSCHEMA;
        if ($data->{'parent_table'}) {
            push @args, '--parent';
            push @args, $data->{'parent_table'};
            $stage_sql_filename = $data->{'parent_table'} . '.stage.sql';
        } else {
            $stage_sql_filename = "$clean_file.stage.sql";
        }
        push @args, '--outfile';
        push @args, $stage_sql_filename;

        print "args: " . join(',',@args) . "\n";
        system('csv2sql', @args, $clean_file);

        my $dbh = Mig::db_connect();
        if (! -e $stage_sql_filename) {
            print "SQL converted file does not exist: $stage_sql_filename\n";
            $stage_sql_filename = '';
        }

        my $rv = $dbh->do("
            UPDATE $MIGSCHEMA.tracked_file
            SET stage_sql_filename = " . $dbh->quote($stage_sql_filename) . "
            WHERE base_filename = " . $dbh->quote($file) . "
            ;
        ") || die "Error updating table $MIGSCHEMA.tracked_file: $!\n";
        Mig::db_disconnect($dbh);
    } else {
        print "File not currently tracked: $file\n";
    }
}