# File: Quotegrabs_SQLite.pm
# Author: pragma_
#
# Purpose: SQLite back-end for storing and retreiving quotegrabs

package PBot::Quotegrabs_SQLite;

use warnings;
use strict;

use DBI;
use Carp qw(shortmess);

sub new {
  if(ref($_[1]) eq 'HASH') {
    Carp::croak("Options to " . __FILE__ . " should be key/value pairs, not hash reference");
  }

  my ($class, %conf) = @_;

  my $self = bless {}, $class;
  $self->initialize(%conf);
  return $self;
}

sub initialize {
  my ($self, %conf) = @_;

  $self->{pbot} = delete $conf{pbot} // Carp::croak("Missing pbot reference in " . __FILE__);
  $self->{filename} = delete $conf{filename};
}

sub begin {
  my $self = shift;

  $self->{pbot}->{logger}->log("Opening quotegrabs SQLite database: $self->{filename}\n");

  $self->{dbh} = DBI->connect("dbi:SQLite:dbname=$self->{filename}", "", "", { RaiseError => 1, PrintError => 0 }) or die $DBI::errstr;

  eval {
    $self->{dbh}->do(<< 'SQL');
CREATE TABLE IF NOT EXISTS Quotegrabs (
  id         INTEGER PRIMARY KEY,
  nick       TEXT,
  channel    TEXT,
  grabbed_by TEXT,
  text       TEXT,
  timestamp  NUMERIC
)
SQL
  };

  $self->{pbot}->{logger}->log($@) if $@;
}

sub end {
  my $self = shift;

  $self->{pbot}->{logger}->log("Closing quotegrabs SQLite database\n");

  if(exists $self->{dbh} and defined $self->{dbh}) {
    $self->{dbh}->disconnect();
    delete $self->{dbh};
  }
}

sub add_quotegrab {
  my ($self, $quotegrab) = @_;

  my $id = eval {
    my $sth = $self->{dbh}->prepare('INSERT INTO Quotegrabs VALUES (?, ?, ?, ?, ?, ?)');
    $sth->bind_param(1, undef);
    $sth->bind_param(2, $quotegrab->{nick});
    $sth->bind_param(3, $quotegrab->{channel});
    $sth->bind_param(4, $quotegrab->{grabbed_by});
    $sth->bind_param(5, $quotegrab->{text});
    $sth->bind_param(6, $quotegrab->{timestamp});
    $sth->execute();

    return $self->{dbh}->sqlite_last_insert_rowid();
  };

  $self->{pbot}->{logger}->log($@) if $@;
  return $id;
}

sub get_quotegrab {
  my ($self, $id) = @_;

  my $quotegrab = eval {
    my $sth = $self->{dbh}->prepare('SELECT * FROM Quotegrabs WHERE id == ?');
    $sth->bind_param(1, $id);
    $sth->execute();
    return $sth->fetchrow_hashref();
  };

  $self->{pbot}->{logger}->log($@) if $@;
  return $quotegrab;
}

sub get_random_quotegrab {
  my ($self, $nick, $channel, $text) = @_;

  $nick =~ s/\.?\*\??/%/g if defined $nick;
  $channel =~ s/\.?\*\??/%/g if defined $channel;
  $text =~ s/\.?\*\??/%/g if defined $text;

  $nick =~ s/\./_/g if defined $nick;
  $channel =~ s/\./_/g if defined $channel;
  $text =~ s/\./_/g if defined $text;

  my $quotegrab = eval {
    my $sql = 'SELECT * FROM Quotegrabs ';
    my @params;
    my $where = 'WHERE ';
    my $and = '';

    if(defined $nick) {
      $sql .= $where . 'nick LIKE ? ';
      push @params, "%$nick%";
      $where = '';
      $and = 'AND ';
    } 

    if(defined $channel) {
      $sql .= $where . $and . 'channel LIKE ? ';
      push @params, $channel;
      $where = '';
      $and = 'AND ';
    }

    if(defined $text) {
      $sql .= $where . $and . 'text LIKE ? ';
      push @params, "%$text%";
    }

    $sql .= 'ORDER BY RANDOM() LIMIT 1';

    my $sth = $self->{dbh}->prepare($sql);
    $sth->execute(@params);
    return $sth->fetchrow_hashref();
  };

  $self->{pbot}->{logger}->log($@) if $@;
  return $quotegrab;
}

sub get_all_quotegrabs {
  my $self = shift;

  my $quotegrabs = eval {
    my $sth = $self->{dbh}->prepare('SELECT * from Quotegrabs');
    $sth->execute();
    return $sth->fetchall_arrayref({});
  };

  $self->{pbot}->{logger}->log($@) if $@;
  return $quotegrabs;
}

sub delete_quotegrab {
  my ($self, $id) = @_;

  eval {
    my $sth = $self->{dbh}->prepare('DELETE FROM Quotegrabs WHERE id == ?');
    $sth->bind_param(1, $id);
    $sth->execute();
  };

  $self->{pbot}->{logger}->log($@) if $@;
}

1;