#!/usr/bin/perl -w
use strict;

use Data::Dumper;

#use blib;
use Fuse qw(fuse_get_context);
use POSIX qw(ENOENT EISDIR EINVAL);

my $handle;

my (%files) = (
	'.' => {
		type => 0040,
		mode => 0755,
		ctime => time()-1000
	},
	bbc_one => {
		type => 0100,
		mode => 0644,
		ctime => time()-2000
	},
	bbc_two => {
		type => 0100,
		mode => 0644,
		ctime => time()-1000
	},
	bbc_three => {
		type => 0100,
		mode => 0644,
		ctime => time()-1000
	},
	bbc_four => {
		type => 0100,
		mode => 0644,
		ctime => time()-1000
	},
);

sub filename_fixup {
	my ($file) = shift;
	$file =~ s,^/,,;
	$file = '.' unless length($file);
	return $file;
}

sub e_getattr {
	my ($file) = filename_fixup(shift);
	$file =~ s,^/,,;
	$file = '.' unless length($file);
	return -ENOENT() unless exists($files{$file});
	# This is something of a hack
	my $size = 0xffffffff;
	my ($modes) = ($files{$file}{type}<<9) + $files{$file}{mode};
	my ($dev, $ino, $rdev, $blocks, $gid, $uid, $nlink, $blksize) = (0,0,0,1,0,0,1,1024);
	my ($atime, $ctime, $mtime);
	$atime = $ctime = $mtime = $files{$file}{ctime};
	return ($dev,$ino,$modes,$nlink,$uid,$gid,$rdev,$size,$atime,$mtime,$ctime,$blksize,$blocks);
}

sub e_getdir {
	# return as many text filenames as you like, followed by the retval.
	print((scalar keys %files)."\n");
	return (keys %files),0;
}

sub e_open {
	# VFS sanity check; it keeps all the necessary state, not much to do here.
    	my $file = filename_fixup(shift);
	my ($flags, $fileinfo) = @_;
	return -ENOENT() unless exists($files{$file});
	return -EISDIR() if $files{$file}{type} & 0040;
    
	my $fh = [ rand() ];
	open ($handle, "ssh cavan.codon.org.uk get_iplayer --pid tv:$file --stdout --nowrite |");
	return (0);
}

sub e_read {
	my ($file) = filename_fixup(shift);
	my ($count, $off, $fh) = @_;
	my $buffer;
	return -ENOENT() unless exists($files{$file});
        read $handle, $buffer, $count;
	return $buffer;
}

sub e_release {
        my ($file) = filename_fixup(shift);
	close $handle;
}

sub e_statfs { return 255, 1, 1, 1, 1, 2 }

# If you run the script directly, it will run fusermount, which will in turn
# re-run this script.  Hence the funky semantics.
my ($mountpoint) = "";
$mountpoint = shift(@ARGV) if @ARGV;
Fuse::main(
	debug=>1,
	mountpoint=>$mountpoint,
	getattr=>"main::e_getattr",
	getdir =>"main::e_getdir",
	open   =>"main::e_open",
	statfs =>"main::e_statfs",
	read   =>"main::e_read",
	release   =>"main::e_release",
	threaded=>0
);