#! /usr/bin/env perl
# vim: set filetype=perl ts=4 sw=4 sts=4 et:
use common::sense;
use Term::ANSIColor;
use JSON;

use File::Basename;
use lib dirname(__FILE__) . '/../../../lib/perl';
use OVH::Result;
use OVH::Bastion;
use OVH::Bastion::Plugin qw( :DEFAULT help );

# globally allow sys_getpw* and sys_getgr* cache use
$ENV{'PW_GR_CACHE'} = 1;

my $remainingOptions = OVH::Bastion::Plugin::begin(
    argv    => \@ARGV,
    header  => "list bastion accounts",
    options => {
        "inactive-only"    => \my $inactiveOnly,
        "realm-only"       => \my $realmOnly,
        "account=s"        => \my $account,
        "audit"            => \my $audit,
        "no-password-info" => \my $noPasswordInfo,
        "no-output"        => \my $noOutput,
        'exclude=s'        => \my @excludes,
        'include=s'        => \my @includes,
    },
    helptext => <<'EOF',
List the bastion accounts

Usage: --osh SCRIPT_NAME [OPTIONS]

  --account ACCOUNT   Only list the specified account. This is an easy way to check whether the account exists
  --inactive-only     Only list inactive accounts
  --audit             Show more verbose information (SLOW!), you need to be a bastion auditor
  --no-password-info  Don't gather password info in audit mode (makes --audit way faster)
  --no-output         Don't print human-readable output (faster, use with --json)
  --include PATTERN   Only show accounts whose name match the given PATTERN (see below)
                         This option can be used multiple times to refine results
  --exclude PATTERN   Omit accounts whose name match the given PATTERN (see below)
                         This option can be used multiple times.
                         Note that --exclude takes precedence over --include

**Note:** PATTERN supports the ``*`` and ``?`` wildcards.
If PATTERN is a simple string without wildcards, then names containing this string will be considered.
EOF
);

sub tristate2str {
    my $v = shift;
    my $r = shift;
    return (
        defined $v
        ? ($v ? colored('yes', $r ? 'red' : 'green') : colored('no', $r ? 'green' : 'red'))
        : colored('-', 'blue')
    );
}

if ($realmOnly) {
    osh_exit(R('ERR_INVALID_PARAMETER'), "Option --realm-only is no longer supported, use realmList instead");
}

my $fnret;
if ($account) {
    $fnret = OVH::Bastion::get_account_list(accounts => [$account]);
}
else {
    $fnret = OVH::Bastion::get_account_list();
}

$fnret or osh_exit $fnret;
my $accounts = $fnret->value;

if ($audit && !OVH::Bastion::is_auditor(account => $self)) {
    osh_exit(R('ERR_PERMISSION_DENIED', msg => "You need to be a bastion auditor to use --audit"));
}

my $fnretPassword;
if ($audit && !$noPasswordInfo) {
    # get UNIX password info for all accounts
    my @command = qw{ sudo -n -u root -- /usr/bin/env perl -T };
    push @command, $OVH::Bastion::BASEPATH . '/bin/helper/osh-accountGetPasswordInfo', '--all';
    $fnretPassword = OVH::Bastion::helper(cmd => \@command);
}

# if we have excludes and/or includes, transform those into regexes
my $includere = OVH::Bastion::build_re_from_wildcards(wildcards => \@includes, implicit_contains => 1)->value;
my $excludere = OVH::Bastion::build_re_from_wildcards(wildcards => \@excludes, implicit_contains => 1)->value;

my $result_hash = {};
foreach my $account (sort keys %$accounts) {

    # if we have excludes, match name against the built regex
    next if ($excludere && $account =~ $excludere);

    # same for includes
    next if ($includere && $account !~ $includere);

    my %states;
    $states{'is_active'} = undef;
    $fnret = OVH::Bastion::is_account_active(account => $account);
    if ($fnret->is_ok) {
        next if $inactiveOnly;
        $states{'is_active'} = 1;
    }
    elsif ($fnret->is_ko) {
        $states{'is_active'} = 0;
    }

    if ($audit) {
        $fnret = OVH::Bastion::is_account_nonfrozen(account => $account);
        $states{'is_frozen'} = undef;
        if ($fnret->is_ok) {
            $states{'is_frozen'} = 0;
        }
        elsif ($fnret->is_ko) {
            $states{'is_frozen'}   = 1;
            $states{'freeze_info'} = $fnret->value;
        }

        $fnret = OVH::Bastion::is_account_ttl_nonexpired(sysaccount => $account, account => $account);
        $states{'is_ttl_expired'} = undef;
        if ($fnret->is_ok) {
            $states{'is_ttl_expired'} = 0;
        }
        elsif ($fnret->is_ko) {
            $states{'is_ttl_expired'}      = 1;
            $states{'ttl_expired_details'} = $fnret->value->{'details'};
        }

        $fnret = OVH::Bastion::is_account_nonexpired(sysaccount => $account);
        $states{'is_expired'} = undef;
        if ($fnret->is_ok) {
            $states{'is_expired'} = 0;
        }
        elsif ($fnret->is_ko) {
            $states{'is_expired'}   = 1;
            $states{'expired_days'} = $fnret->value->{'days'};
        }

        $states{'already_seen_before'} = undef;
        if ($fnret->value && defined $fnret->value->{'already_seen_before'}) {
            $states{'already_seen_before'} = $fnret->value->{'already_seen_before'} ? 1 : 0;
        }

        $states{'last_activity'}           = undef;
        $states{'last_activity_timestamp'} = undef;
        my $seconds = $fnret->value->{'seconds'};
        if (defined $seconds) {
            $fnret = OVH::Bastion::duration2human(seconds => $seconds, tense => "past");
            if ($fnret) {
                $states{'last_activity_timestamp'} = time() - $seconds;
                $states{'last_activity'}           = sprintf(
                    "%s on %s (%s ago)",
                    (
                        defined $states{'already_seen_before'}
                        ? ($states{'already_seen_before'} ? "Last seen" : "Created")
                        : "Last activity"
                    ),
                    $fnret->value->{'date'},
                    $fnret->value->{'duration'}
                );
            }
        }

        $states{'can_connect'} = 1;
        $states{'can_connect'} = 0 if (!defined $states{'is_active'} || $states{'is_active'} == 0);
        $states{'can_connect'} = 0 if (!defined $states{'is_frozen'} || $states{'is_frozen'} == 0);
        $states{'can_connect'} = 0 if (!defined $states{'is_expired'} || $states{'is_expired'} == 0);
        $states{'can_connect'} = 0 if (!defined $states{'is_ttl_expired'} || $states{'is_ttl_expired'} == 0);

        $states{'mfa_password_required'} = OVH::Bastion::is_user_in_group(
            user  => $account,
            group => OVH::Bastion::MFA_PASSWORD_REQUIRED_GROUP,
        ) ? 1 : 0;
        $states{'mfa_password_configured'} =
          OVH::Bastion::is_user_in_group(
            user  => $account,
            group => OVH::Bastion::MFA_PASSWORD_CONFIGURED_GROUP,
          )
          ? 1
          : 0;
        $states{'mfa_password_bypass'} = OVH::Bastion::is_user_in_group(
            user  => $account,
            group => OVH::Bastion::MFA_PASSWORD_BYPASS_GROUP,
        ) ? 1 : 0;
        $states{'mfa_totp_required'} =
          OVH::Bastion::is_user_in_group(user => $account, group => OVH::Bastion::MFA_TOTP_REQUIRED_GROUP)
          ? 1
          : 0;
        $states{'mfa_totp_configured'} = OVH::Bastion::is_user_in_group(
            user  => $account,
            group => OVH::Bastion::MFA_TOTP_CONFIGURED_GROUP,
        ) ? 1 : 0;
        $states{'mfa_totp_bypass'} =
          OVH::Bastion::is_user_in_group(user => $account, group => OVH::Bastion::MFA_TOTP_BYPASS_GROUP)
          ? 1
          : 0;
        $states{'pam_auth_bypass'} =
          OVH::Bastion::is_user_in_group(user => $account, group => OVH::Bastion::PAM_AUTH_BYPASS_GROUP)
          ? 1
          : 0;
        $states{'pubkey_auth_optional'} =
          OVH::Bastion::is_user_in_group(
            user  => $account,
            group => OVH::Bastion::OSH_PUBKEY_AUTH_OPTIONAL_GROUP,
          )
          ? 1
          : 0;

        if ($fnretPassword) {
            $states{"password_$_"} = $fnretPassword->value->{$account}{$_}
              for (keys %{$fnretPassword->value->{$account}});
        }
    }

    $fnret = OVH::Bastion::account_config(account => $account, key => "creation_info");
    if ($fnret && $fnret->value) {
        eval {
            my $data = decode_json($fnret->value);
            $states{'created_by'} = $data->{'by'};
        };
        if ($@) {
            osh_warn("Error decoding creation_info of account '$account' ($@)");
        }
    }

    $result_hash->{$account}         = \%states;
    $result_hash->{$account}{'name'} = $account;
    $result_hash->{$account}{'uid'}  = $accounts->{$account}{'uid'};

    # don't print human-readable version (usually used with --json)
    next if $noOutput;

    if ($audit) {
        my @mfaPassword;
        push @mfaPassword, 'required' if $states{'mfa_password_required'};
        push @mfaPassword, 'enabled'  if $states{'mfa_password_configured'};
        push @mfaPassword, 'bypass'   if $states{'mfa_password_bypass'};
        my @mfaTOTP;
        push @mfaTOTP, 'required' if $states{'mfa_totp_required'};
        push @mfaTOTP, 'enabled'  if $states{'mfa_totp_configured'};
        push @mfaTOTP, 'bypass'   if $states{'mfa_totp_bypass'};

        osh_info sprintf(
            "%-18s %6d active:%-12s expired:%-12s frozen:%-12s ttl_expired:%-12s"
              . "can_connect:%-12s already_seen:%-12s mfa_password:%-25s "
              . "mfa_totp:%-25s pam_bypass:%-12s pubkey_auth_optional:%-12s "
              . "pass_status:%-15s pass_changed:%-10s pass_min_days:%-3d "
              . "pass_max_days:%-3d pass_warn_days:%-3d created_by:%-12s " . " %s\n",
            $account,
            $accounts->{$account}{'uid'},
            tristate2str($states{'is_active'}),
            tristate2str($states{'is_expired'},     1),
            tristate2str($states{'is_frozen'},      1),
            tristate2str($states{'is_ttl_expired'}, 1),
            tristate2str($states{'can_connect'}),
            tristate2str($states{'already_seen_before'}),
            @mfaPassword ? colored(join(',', @mfaPassword), 'green') : colored('-', 'blue'),
            @mfaTOTP     ? colored(join(',', @mfaTOTP),     'green') : colored('-', 'blue'),
            tristate2str($states{'pam_auth_bypass'},      1),
            tristate2str($states{'pubkey_auth_optional'}, 1),
            (
                $states{'password_password'} eq 'locked' ? colored('locked', 'blue')
                : (
                    $states{'password_password'} eq 'set' ? colored('set', 'green')
                    : colored($states{'password_password'}, 'red')
                )
            ),
            $states{'password_date_changed'},
            $states{'password_min_days'},
            $states{'password_max_days'},
            $states{'password_warn_days'},
            $states{'created_by'},
            $states{'last_activity'},
        );
    }
    else {
        osh_info sprintf("%-18s %6d\n", $account, $accounts->{$account}{'uid'});
    }
}

if ($noOutput) {
    osh_info "No-output requested, if you see only this message, you might have omitted --json";
}

osh_ok $result_hash;