package Cualsea::Server::Mail;

use v5.30.0;

use strict;
use warnings;

use Const::Fast;
use Email::Sender::Transport::SMTP;
use Email::Sender::Simple qw/sendmail/;
use Email::MIME;

const my $MAIL_CONFIG_FILE      => '/etc/cualsea/mail.conf';
const my $REPORT_TO_CONFIG_FILE => '/etc/cualsea/report_to';
const my $FROM_CONFIG_FILE      => '/etc/cualsea/from';

sub new {
    my $class = shift;
    return bless {}, $class;
}

sub notify_service_down {
    my $self = shift;
    my $name = shift;

    my $mime = Email::MIME->create(
        header_str => [
            From    => $self->from,
            To      => [ $self->report_to ],
            Subject => "Service $name down",
        ],
        parts => [
            Email::MIME->create(
                attributes => {
                    content_type => 'text/plain',
                    disposition  => 'attachment',
                    charset      => 'UTF-8',
                    encoding     => "8bit",
                },
                body_str => "$name is not up",
            )
        ]
    );
    sendmail( $mime, { transport => $self->transport } );
}

sub report {
    my $self         = shift;
    my $dbh          = Cualsea::Server::DB->dbh();
    my $current_date = DateTime->now;
    my $message      = "$current_date\n\n";
    $message .= "@{[`uname -a`]} @{[`free -m`]} @{[`uptime`]}\n\n";
    $message .= "List of services\n\n";
    my $services = $dbh->selectall_arrayref( <<'EOF', { Slice => {} } );
SELECT name FROM services;
EOF
    for my $service (@$services) {
        $message .= "@{[$service->{name}]}\n";
    }
    $message .= "\nLast hour monitor\n\n";
    my $monitor = $dbh->selectall_arrayref(
        <<'EOF', { Slice => {} }, $current_date->clone->add( hours => -1 ) . '' );
SELECT date_execution, name, is_up FROM monitor where date_execution > ?;
EOF

    for my $register (@$monitor) {
        my $date_execution = $register->{date_execution};
        my $name           = $register->{name};
        my $is_up          = $register->{is_up};

        $message .=
          "$date_execution @{[ defined $name ? $name : '']} @{[$is_up ? 'started' : 'stopped']}\n";
    }

    $message .= "\nLast 20 commands\n\n";

    my $log = $dbh->selectall_arrayref( <<'EOF', { Slice => {} } );
SELECT date_execution, parameters, result FROM log ORDER BY id DESC LIMIT 20;
EOF
    for my $register (@$log) {
        my $date_execution = $register->{date_execution};
        my $parameters     = $register->{parameters};
        my $result         = $register->{result};

        $message .= "$date_execution $parameters $result\n";
    }

    my $mime = Email::MIME->create(
        header_str => [
            From    => $self->from,
            To      => [ $self->report_to ],
            Subject => "Service report.",
        ],
        parts => [
            Email::MIME->create(
                attributes => {
                    content_type => 'text/plain',
                    disposition  => 'attachment',
                    charset      => 'UTF-8',
                    encoding     => "8bit",
                },
                body_str => $message,
            )
        ]
    );
    sendmail( $mime, { transport => $self->transport } );

}

sub report_to {
    my $self = shift;
    if ( !defined $self->{report_to} ) {
        open my $fh, '<', $REPORT_TO_CONFIG_FILE
          or die "Unable to get mail to report from config file";
        my $email = <$fh>;
        chomp $email;
        close $fh;
        $self->{report_to} = $email;
    }
    return $self->{report_to};
}

sub from {
    my $self = shift;
    if ( !defined $self->{from} ) {
        open my $fh, '<', $FROM_CONFIG_FILE
          or die "Unable to get mail From from config file";
        my $email = <$fh>;
        chomp $email;
        close $fh;
        $self->{from} = $email;
    }
    return $self->{from};
}

sub transport {
    my $self = shift;
    if ( !defined $self->{transport} ) {
        my %parameters;
        open my $fh, '<', $MAIL_CONFIG_FILE
          or die "Unable to get transport from config file";
        while ( my $line = <$fh> ) {
            my ( $key, $value ) = $line =~ /^(.*?)=(.*?)\s*$/;
            if ( $key eq 'hosts' ) {
                $value = [$value];
            }
            $parameters{$key} = $value;
        }
        close $fh;
        $self->{transport} = Email::Sender::Transport::SMTP->new(%parameters);
    }
    return $self->{transport};
}
1;