+my $nottax = 'cust_bill_pkg.pkgnum != 0';
+
+# one query for each column of the report
+# plus separate queries for the totals row
+my (%sql, %all_sql);
+
+# general form
+my $exempt = "SELECT cust_main_county.taxnum, SUM(exempt_charged)
+ FROM cust_main_county
+ JOIN ($pkg_tax_exempt) AS pkg_tax_exempt
+ USING (taxnum)
+ JOIN cust_bill_pkg USING (billpkgnum)
+ $join_cust $where AND $nottax $group";
+
+my $all_exempt = "SELECT SUM(exempt_charged)
+ FROM cust_main_county
+ JOIN ($pkg_tax_exempt) AS pkg_tax_exempt
+ USING (taxnum)
+ JOIN cust_bill_pkg USING (billpkgnum)
+ $join_cust $where AND $nottax";
+
+# sales to tax-exempt customers
+$sql{exempt_cust} = $exempt;
+$sql{exempt_cust} =~ s/EXEMPT_WHERE/WHERE exempt_cust = 'Y' OR exempt_cust_taxname = 'Y'/;
+$all_sql{exempt_cust} = $all_exempt;
+$all_sql{exempt_cust} =~ s/EXEMPT_WHERE/WHERE exempt_cust = 'Y' OR exempt_cust_taxname = 'Y'/;
+
+# sales of tax-exempt packages
+$sql{exempt_pkg} = $exempt;
+$sql{exempt_pkg} =~ s/EXEMPT_WHERE/WHERE exempt_setup = 'Y' OR exempt_recur = 'Y'/;
+$all_sql{exempt_pkg} = $all_exempt;
+$all_sql{exempt_pkg} =~ s/EXEMPT_WHERE/WHERE exempt_setup = 'Y' OR exempt_recur = 'Y'/;
+
+# monthly per-customer exemptions
+$sql{exempt_monthly} = $exempt;
+$sql{exempt_monthly} =~ s/EXEMPT_WHERE/WHERE exempt_monthly = 'Y'/;
+$all_sql{exempt_monthly} = $all_exempt;
+$all_sql{exempt_monthly} =~ s/EXEMPT_WHERE/WHERE exempt_monthly = 'Y'/;
+
+# taxable sales
+$sql{taxable} = "SELECT cust_main_county.taxnum,
+ SUM(cust_bill_pkg.setup + cust_bill_pkg.recur - COALESCE(exempt_charged, 0))
+ FROM cust_main_county
+ JOIN ($pkg_tax) AS pkg_tax USING (taxnum)
+ JOIN cust_bill_pkg USING (invnum, pkgnum)
+ LEFT JOIN ($pkg_tax_exempt) AS pkg_tax_exempt
+ ON (pkg_tax_exempt.billpkgnum = cust_bill_pkg.billpkgnum
+ AND pkg_tax_exempt.taxnum = cust_main_county.taxnum)
+ $join_cust $where AND $nottax $group";
+
+# Here we're going to sum all line items that are taxable _at all_,
+# under any tax. exempt_charged is the sum of all exemptions for a
+# particular billpkgnum + taxnum; we take the taxnum that has the
+# smallest sum of exemptions and subtract that from the charged amount.
+$all_sql{taxable} = "SELECT
+ SUM(cust_bill_pkg.setup + cust_bill_pkg.recur - COALESCE(min_exempt, 0))
+ FROM cust_bill_pkg
+ JOIN (
+ SELECT invnum, pkgnum, MIN(exempt_charged) AS min_exempt
+ FROM ($pkg_tax) AS pkg_tax
+ JOIN cust_bill_pkg USING (invnum, pkgnum)
+ LEFT JOIN ($pkg_tax_exempt) AS pkg_tax_exempt USING (billpkgnum, taxnum)
+ GROUP BY invnum, pkgnum
+ ) AS pkg_is_taxable
+ USING (invnum, pkgnum)
+ $join_cust $where AND $nottax";
+ # we don't join pkg_tax_exempt.taxnum here, because
+
+$sql{taxable} =~ s/EXEMPT_WHERE//; # unrestricted
+$all_sql{taxable} =~ s/EXEMPT_WHERE//;
+
+# there isn't one for 'sales', because we calculate sales by adding up
+# the taxable and exempt columns.
+
+# sum of billed tax:
+# join cust_bill_pkg to cust_main_county via cust_bill_pkg_tax_location
+my $taxfrom = " FROM cust_bill_pkg
+ $join_cust
+ LEFT JOIN cust_bill_pkg_tax_location USING ( billpkgnum )
+ LEFT JOIN cust_main_county USING ( taxnum )";
+
+my $istax = "cust_bill_pkg.pkgnum = 0";
+my $named_tax = "(
+ taxname = itemdesc
+ OR ( taxname IS NULL
+ AND ( itemdesc IS NULL OR itemdesc = '' OR itemdesc = 'Tax' )
+ )
+)";
+
+$sql{tax} = "SELECT cust_main_county.taxnum,
+ SUM(cust_bill_pkg_tax_location.amount)
+ $taxfrom
+ $where AND $istax AND $named_tax
+ $group";
+
+$all_sql{tax} = "SELECT SUM(cust_bill_pkg.setup)
+ FROM cust_bill_pkg
+ $join_cust
+ $where AND $istax";
+
+# sum of credits applied against billed tax
+my $creditfrom = $taxfrom .
+ ' JOIN cust_credit_bill_pkg USING (billpkgtaxlocationnum)';
+my $creditfromwhere = $where .
+ ' AND billpkgtaxratelocationnum IS NULL';
+
+$sql{credit} = "SELECT cust_main_county.taxnum,
+ SUM(cust_credit_bill_pkg.amount)
+ $creditfrom
+ $creditfromwhere AND $istax AND $named_tax
+ $group";
+
+$all_sql{credit} = "SELECT SUM(cust_credit_bill_pkg.amount)
+ FROM cust_credit_bill_pkg
+ JOIN cust_bill_pkg USING (billpkgnum)
+ $join_cust
+ $where AND $istax";
+
+my %data;
+my %total = (owed => 0);
+foreach my $k (keys(%sql)) {
+ my $stmt = $sql{$k};
+ warn "\n".uc($k).":\n".$stmt."\n" if $DEBUG;
+ my $sth = dbh->prepare($stmt);
+ # two columns => key/value
+ $sth->execute
+ or die "failed to execute $k query: ".$sth->errstr;
+ $data{$k} = +{ map { @$_ } @{ $sth->fetchall_arrayref([]) } };
+
+ warn "\n".$all_sql{$k}."\n" if $DEBUG;
+ $total{$k} = FS::Record->scalar_sql( $all_sql{$k} );
+ warn Dumper($data{$k}) if $DEBUG > 1;
+}
+# so $data{tax}, for example, is now a hash with one entry
+# for each taxnum, containing the tax billed on that taxnum.
+
+# oddball cases:
+# "out of taxable region" sales
+my %out;
+my $out_sales_sql =
+ "SELECT SUM(cust_bill_pkg.setup + cust_bill_pkg.recur)
+ FROM (cust_bill_pkg $join_cust)
+ LEFT JOIN ($pkg_tax) AS pkg_tax USING (invnum, pkgnum)
+ LEFT JOIN ($pkg_tax_exempt) AS pkg_tax_exempt USING (billpkgnum)
+ $where AND $nottax
+ AND pkg_tax.taxnum IS NULL AND pkg_tax_exempt.taxnum IS NULL"
+;
+
+$out_sales_sql =~ s/EXEMPT_WHERE//;
+
+$out{sales} = FS::Record->scalar_sql($out_sales_sql);
+
+# unlinked tax collected (for diagnostics)
+my $out_tax_sql =
+ "SELECT SUM(cust_bill_pkg.setup)
+ FROM (cust_bill_pkg $join_cust)
+ LEFT JOIN cust_bill_pkg_tax_location USING (billpkgnum)
+ $where AND $istax AND cust_bill_pkg_tax_location.billpkgnum IS NULL"
+;
+$out{tax} = FS::Record->scalar_sql($out_tax_sql);
+# unlinked tax credited (for diagnostics)
+my $out_credit_sql =
+ "SELECT SUM(cust_credit_bill_pkg.amount)
+ FROM cust_credit_bill_pkg
+ JOIN cust_bill_pkg USING (billpkgnum)
+ $join_cust
+ $where AND $istax AND cust_credit_bill_pkg.billpkgtaxlocationnum IS NULL"
+;
+$out{credit} = FS::Record->scalar_sql($out_credit_sql);
+
+# all sales
+$total{sales} = FS::Record->scalar_sql(
+ "SELECT SUM(cust_bill_pkg.setup + cust_bill_pkg.recur)
+ FROM cust_bill_pkg $join_cust $where AND $nottax"
+);
+
+#tax-report_groups filtering
+my($group_op, $group_value) = ( '', '' );
+if ( $cgi->param('report_group') =~ /^(=|!=) (.*)$/ ) {
+ ( $group_op, $group_value ) = ( $1, $2 );
+}
+my $group_test = sub { # to be applied to a tax label
+ my $label = shift;
+ return 1 unless $group_op; #in case we get called inadvertantly
+ if ( $label eq $out ) { #don't display "out of taxable region" in this case
+ 0;
+ } elsif ( $group_op eq '=' ) {
+ $label =~ /^$group_value/;
+ } elsif ( $group_op eq '!=' ) {
+ $label !~ /^$group_value/;
+ } else {
+ die "guru meditation #00de: group_op $group_op\n";
+ }
+};
+
+# if show_taxclasses is on, %base_regions will contain the same data
+# as %regions, but with taxclasses merged together (and ignoring report_group
+# filtering).
+my (%regions, %base_regions);
+my $tot_tax = 0;
+my $tot_credit = 0;
+
+my @loc_params = qw(country state county);
+push @loc_params, qw(city district) if $cgi->param('show_cities');
+
+foreach my $r ( qsearch({ 'table' => 'cust_main_county', })) {
+ my $taxnum = $r->taxnum;
+ # set up a %regions entry for this region's tax label
+ my $label = $r->label(%label_opt);
+ next if $label eq $out;
+ $regions{$label} ||= { label => $label };
+
+ $regions{$label}->{$_} = $r->get($_) foreach @loc_params;
+ $regions{$label}->{taxnums} ||= [];
+ push @{ $regions{$label}->{taxnums} }, $r->taxnum;
+
+ my %x; # keys are data items (like 'tax', 'exempt_cust', etc.)
+ foreach my $k (keys %data) {
+ next unless exists($data{$k}->{$taxnum});
+ $x{$k} = $data{$k}->{$taxnum};
+ $regions{$label}->{$k} += $x{$k};
+ if ( $k eq 'taxable' or $k =~ /^exempt/ ) {
+ $regions{$label}->{'sales'} += $x{$k};
+ }