#!/usr/bin/perl

use Palm::PDB;
use Palm::Datebook;
use Time::Local;
use POSIX;

$us= $0 =~ m,[^/]+$, ? $& : $0;

$detail= 86400*2;
$lookforward= 86400*(7*4+1);
# run at 15:00 daily

sub setfilename($) {
    die "$us: only one filename at a time please\n" if defined $filename;
    $filename= $_[0];
}

while (@ARGV) {
    $_= shift @ARGV;
    if (m,^(?:\-t)?(\d+)/(\d+)$,) {
	($detail,$lookforward)=($1+0,$2+0);
    } elsif (m,^[./],) {
	setfilename($_);
    } elsif (m/^\-f/) {
	setfilename($');
    } else {
	die "$us: unknown argument/option \`$_'\n";
    }
}

$filename= "DatebookDB.pdb" if !defined $filename;

defined($now= time) or die $!;
stat $filename or die "$us: $filename: $!\n";
$backuptime= (stat _)[10];

$pdb = new Palm::PDB or die $!;
$pdb->Load($filename) or die $!;



foreach $record (@{ $pdb->{records} }) {
    if ($record->{start_hour} != 255) {
	$timestr= sprintf("%02d:%02d-%02d:%02d",
			  $record->{start_hour},
			  $record->{start_minute},
			  $record->{end_hour},
			  $record->{end_minute});
	@lt=(0, $record->{start_minute}, $record->{start_hour});
    } else {
	@lt=(0, 0, 9);
	$timestr= "           ";
    }
    if ($record->{repeat}{type}) {
	$timestr= "onwards    ";
    }
    
    push @lt, $record->{day}, $record->{month}-1,  $record->{year}-1900;
    defined($ettt= timelocal @lt) or die $!;

    next if ($ettt < $now - 86400 ||
	     $ettt > $now + $lookforward);

    @lt2= localtime($ettt) or die $!;
    defined($dowstr= strftime "%a", @lt2) or die $!;

    $datestr= sprintf("%04d-%02d-%02d",
		      $record->{year},
		      $record->{month},
		      $record->{day});
    
    $timesortkey= "$datestr $timestr";
    $evhead= "$datestr $dowstr $timestr";

    $desc= $record->{description};
    $desc =~ s/\x93/\~/g;
    $desc =~ s/\xa3/L/g;
    $desc =~ s/[^\n -\176]/ sprintf "\\x%02x", ord $& /eg;
    $desc =~ s/^ +//;
    $desc =~ s/\n+$//;
    $desc .= "\n";

    if ($desc =~ m/^(.{0,51})\n/) {
	$descsumm= $1;
    } elsif ($desc =~ m/^.{48}/) {
	$descsumm= $&.'...';
    } else {
	$descsumm= " --- no description ?! ---";
    }
    $kind= $ettt < $now + $detail ? 'detail' : 'forward';

    push @{ $events{$kind} }, {
	TSK => $timesortkey,
	Headline => sprintf("%s  %s", $evhead, $descsumm),
	Desc => $desc
	};
}

sub sectline_detail(){ return "Imminent events"; }
sub sectline_forward(){ return "Forthcoming events"; }

sub headline(){
    printf("%s\n", $ev->{Headline})
	or die $!;
}

sub print_forward(){ headline(); }
sub print_detail(){
    print "\n" or die $!;
    headline();
    $_= $ev->{Desc};
    s/^/    /gm;
    print $_ or die $!;
}

foreach $kind (qw(detail forward)) {
    $sectline= &{"sectline_$kind"};
    printf("%s\n%s\n",
	   $sectline,
	   '-'x(length $sectline))
	or die $!;
    if (!@{ $events{$kind} }) {
	printf("None scheduled.\n")
	    or die $!;
    }
    foreach $ev (sort { $a->{TSK} cmp $b->{TSK} } @{ $events{$kind} }) {
	&{"print_$kind"};
    }
    print "\n" or die $!;
}

@lt2= localtime $backuptime or die $!;
defined ($syncstr= strftime "%Y-%m-%d %a %H:%M", @lt2) or die $!;

print("Date of last synch: $syncstr\n".
      "Events entered on PDA after this date are omitted.\n")
    or die $!;
       
close STDOUT or die $!;