#!/usr/bin/perl -w

sub gettok {
    if(/\G\"([^\"]*)\"\s+/gc) {
	return $1;
    } elsif(/\G(\S+)\s+/gc) {
	return $1;
    } else {
	return undef;
    }
}

while(@ARGV) {
    if(!open IF, $ARGV[0]) {
	last;
    }
    shift @ARGV;
    while(<IF>) {
	if(/^prod\s+/g) {
	    $cp = {};
	    $id = gettok;
	    $cp->{"s"} = gettok;
	    $cp->{"p"} = gettok;
	    $cp->{"w"} = gettok;
	    $prod{$id} = $cp;
	}
	if(/^prt\s+/g) {
	    $id = gettok;
	    $prts{$id} = {"name" => gettok, "items" => {}};
	}
	if(/^item\s+/g) {
	    $prt = gettok;
	    if(!exists $prts{$prt}) {
		die "invalid participant $prt in item line";
	    }
	    $a = 1;
	    while($t = gettok) {
		if($t =~ /^\d+(\.\d+)?$/) {
		    $a = $t;
		    next;
		}
		$i = $prts{$prt}->{"items"};
		if(exists $i->{$t}) {
		    $i->{$t} += $a;
		} else {
		    $i->{$t} = $a;
		}
		$a = 1;
	    }
	}
	if(/^freight\s+(\d+)/) {
	    $fc = $1;
	}
	if(/^realprice\s+(\d+)/) {
	    $rp = $1;
	}
    }
    close IF;
}

$yt = $wt = 0;
for $p (sort keys %prts) {
    $I = $prts{$p}->{"items"};
    $sp = $sw = 0;
    for $i (keys %$I) {
	$yt += $I->{$i} * $prod{$i}->{"p"};
	$wt += $I->{$i} * $prod{$i}->{"w"};
	$sp += $I->{$i} * $prod{$i}->{"p"};
	$sw += $I->{$i} * $prod{$i}->{"w"};
    }
    $prts{$p}->{"sp"} = $sp;
    $prts{$p}->{"sw"} = $sw;
}
$er = (($yt + $fc) / $rp);

while($cmd = shift @ARGV) {
    if($cmd eq "stat") {
	print "Total:   $yt ($rp SEK), $wt g\n";
	print "Freight: $fc\n";
	print ("Ratio:   " . $er . "\n");
    } elsif($cmd eq "judgement") {
	for $prt (keys %prts) {
	    print "$prts{$prt}->{name}:\n";
	    $sp = $prts{$prt}->{"sp"};
	    $sw = $prts{$prt}->{"sw"};
	    printf "\tProducts ¥%i (%i SEK), %i g\n", $sp, ($sp / $er), $sw;
	    $ff = $sw / $wt;
	    $sfc = $fc * $ff;
	    printf "\tFreight ¥%i (%.1f%%, %i SEK)\n", $sfc, (100 * $ff), ($sfc / $er);
	    $st = $sfc + $sp;
	    printf "\tTotal: ¥%i (%i SEK)\n", $st, ($st / $er);
	}
    } elsif($cmd eq "rcpt-txt") {
	$prt = shift @ARGV;
	$I = $prts{$prt}->{"items"};
	for $i (keys %$I) {
	    printf "%.1f %s\t\t%i (%i SEK)\t%i g\n", $I->{$i}, $prod{$i}->{"s"}, $I->{$i} * $prod{$i}->{"p"}, $I->{$i} * $prod{$i}->{"p"} / $er, $I->{$i} * $prod{$i}->{"w"};
	}
    } elsif($cmd eq "rcpt-tex") {
	print <<EOF
\\documentclass[a4paper,11pt]{article}
\\usepackage[swedish]{babel}
\\usepackage[T1]{fontenc}
\\usepackage[utf8x]{inputenc}
\\usepackage{longtable}
\\title{Kvitto}
\\begin{document}
\\begin{longtable}{lllllll}
Artikel & Antal & \\\'{A}-pris & Pris & Pris (SEK) & Vikt \\\\
\\hline
EOF
;
	$prt = shift @ARGV;
	$I = $prts{$prt}->{"items"};
	$ni = 0;
	for $i (keys %$I) {
	    printf "%s & ", $prod{$i}->{"s"};
	    printf "%.1f & ", $I->{$i};
	    printf "%i & ", $prod{$i}->{"p"};
	    printf "%i & ", $prod{$i}->{"p"} * $I->{$i};
	    printf "%.2f & ", $prod{$i}->{"p"} * $I->{$i} / $er;
	    printf "%i & ", $prod{$i}->{"w"} * $I->{$i};
	    #printf "%.1f %s\t\t%i (%i SEK)\t%i g", $I->{$i}, $prod{$i}->{"s"}, $I->{$i} * $prod{$i}->{"p"}, $I->{$i} * $prod{$i}->{"p"} / $er, $I->{$i} * $prod{$i}->{"w"};
	    print "\\\\\n";
	    $ni += $I->{$i};
	}
	print "\\hline\nDelsumma & ";
	printf "%i & & ", $ni;
	printf "%i & ", $prts{$prt}->{"sp"};
	printf "%.2f & ", $prts{$prt}->{"sp"} / $er;
	printf "%i & ", $prts{$prt}->{"sw"};
	print "\\\\\n";
	$ff = $prts{$prt}->{"sw"} / $wt;
	printf "Frakt & %.1f\\%% & ", 100 * $ff;
	printf "%i & ", $fc;
	printf "%i & ", $fc * $ff;
	printf "%.2f", $fc * $ff / $er;
	print "\\\\\n";
	print "\\hline\nTotalt & & & ";
	printf "%i & ", $fc * $ff + $prts{$prt}->{"sp"};
	printf "\\textbf{%.2f} & ", ($fc * $ff + $prts{$prt}->{"sp"}) / $er;
	print "\n";
	print "\\end{longtable}\n";
	print "\n";
	print "\\end{document}\n";
    } else {
	print STDERR "usage: ordershare DESCFILE... COMMAND...\n";
	print STDERR "\tcommands:\n";
	print STDERR "\tstat                     General statistics\n";
	print STDERR "\tjudgement                Overview for each participant\n";
	print STDERR "\trcpt-txt PARTICIPANT     Receipt in text format\n";
	print STDERR "\trcpt-tex PARTICIPANT     Receipt in LaTeX format\n";
    }
}