#!/usr/bin/perl
use warnings;
use strict;
use lib '../lib';

use YTYT;

my %ytyt_args = (
    host => 'www.youtube.com'
);

foreach my $arg (qw/ YTYT_DB_PATH YTYT_HOST /) {
    if (defined($ENV{$arg}) && $ENV{$arg} != '') {
        my ($ytyt_arg) = $arg =~ m/YTYT_(.*)/;
        $ytyt_args{lc($ytyt_arg)} = $ENV{$arg};
    }
}

my $youtube = YTYT::new( %ytyt_args );

my $content;

unless (defined $ARGV[0]) {
    die "Requires at least one argument with a User ID, Channel ID or URL string\n" .
    "with either of these values included. RegEx argument optional" . (scalar @ARGV) . "\n";
}

my %params;
if (defined $ARGV[1]) {
    $params{regex} = $ARGV[1];
}

# channelID is unambiguous, but not typical for a user to see.
# Treat it as most accurate, but fall back to more common identifiers
if ($ARGV[0] =~ m%^UC[a-zA-Z0-9\-\_]{22}$%) {
    $params{channelId} = $ARGV[0];
    #print "Found raw channelId " . $params{channelId} . "\n";
# YouTube now presents the '@Handle' in the public URL, so this is the next most likely to be seen
} elsif ($ARGV[0] =~ m%^(?:(?:https://)?(?:www\.|m\.)?youtube\.com/)?\@([^\/]+)%) {
    $params{channelHandle} = $1;
    #die("Found \@$params{channelHandle}\n");
# Channels that have not yet declared a handle will still have the ID in the URL
} elsif ($ARGV[0] =~ m%^(https://)?(www\.|m\.)?youtube\.com/channel/UC[a-zA-Z0-9\-\_]{22}%) {
    $params{channelId} = $ARGV[0];
    $params{channelId} =~ s%(https://)?(www\.|m\.)?youtube\.com/channel/(UC[^/]{22})(/.*)?%$3%;
    #print "Found URL encoded channelId " . $params{channelId} . "\n";
# Channel names used to be presented in the URL.
# This is probably deprecated, but it does not hurt to maintain support
} elsif ($ARGV[0] =~ m%^(https://)?(www\.|m\.)?youtube\.com/c/%) {
    $params{channelName} = $ARGV[0];
    $params{channelName} =~ s%(https://)?(www\.|m\.)?youtube\.com/c/([^/]*)/?.*%$4%;
    #print "Found URL encoded channelName " . $params{channelName} . "\n";
# The '/user/' path still technically works, though I don't think it is used anywhere
} elsif ($ARGV[0] =~ m%^(https://)?(www\.|m\.)?youtube\.com/user/%) {
    $params{userName} = $ARGV[0];
    $params{userName} =~ s%(https://)?(www\.|m\.)?youtube\.com/user/([^/]*)/?.*%$4%;
    #print "Found URL encoded channelName " . $params{userName} . "\n";
# As a last attempt, assume that it is a raw channel name if no '@' is included.
} else {
    $params{channelName} = $ARGV[0];
    #print "Found raw channelName " . $params{channelName} . "\n";
}

# Fetch page to fill in missing columns

$content = $youtube->get_videos_page( %params );

unless (defined $params{channelName}) {
    $params{channelName} = $content->{metadata}->{channelMetadataRenderer}->{title};
}
unless (defined $params{channelId}) {
    $params{channelId} = $content->{metadata}->{channelMetadataRenderer}->{externalId};
}

$params{channelThumbnail} = $content->{metadata}->{channelMetadataRenderer}->{avatar}->{thumbnails}->[0]->{url};

$youtube->db_connect();

my @check = $youtube->{dbh}->selectrow_array("SELECT channelId FROM channels WHERE channelId = '$params{channelId}';");
if (scalar @check) {
    $youtube->db_disconnect();
    die "Channel already exists in database.\n";
}

$youtube->db_insert( table => 'channels', %params ) || die "Failed to insert: $!\n";
$youtube->db_disconnect();
print "Channel added successfully\n";