# Copyright 2012 Catalyst IT Ltd.
# Copyright 2015 Koha Development team
#
# This file is part of Koha.
#
# Koha is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 3 of the License, or
# (at your option) any later version.
#
# Koha is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Koha; if not, see <http://www.gnu.org/licenses>.

use Modern::Perl;

use Test::More tests => 9;
use Test::Warn;

use t::lib::TestBuilder;
use C4::Context;
use Koha::Database;
use Koha::Reports;

use_ok('C4::Reports::Guided');
can_ok(
    'C4::Reports::Guided',
    qw(save_report delete_report execute_query)
);

my $schema = Koha::Database->new->schema;
$schema->storage->txn_begin;
my $builder = t::lib::TestBuilder->new;

subtest 'strip_limit' => sub {
    # This is the query I found that triggered bug 8594.
    my $sql = "SELECT aqorders.ordernumber, biblio.title, biblio.biblionumber, items.homebranch,
        aqorders.entrydate, aqorders.datereceived,
        (SELECT DATE(datetime) FROM statistics
            WHERE itemnumber=items.itemnumber AND
                (type='return' OR type='issue') LIMIT 1)
        AS shelvedate,
        DATEDIFF(COALESCE(
            (SELECT DATE(datetime) FROM statistics
                WHERE itemnumber=items.itemnumber AND
                (type='return' OR type='issue') LIMIT 1),
        aqorders.datereceived), aqorders.entrydate) AS totaldays
    FROM aqorders
    LEFT JOIN biblio USING (biblionumber)
    LEFT JOIN items ON (items.biblionumber = biblio.biblionumber
        AND dateaccessioned=aqorders.datereceived)
    WHERE (entrydate >= '2011-01-01' AND (datereceived < '2011-02-01' OR datereceived IS NULL))
        AND items.homebranch LIKE 'INFO'
    ORDER BY title";

    my ($res_sql, $res_lim1, $res_lim2) = C4::Reports::Guided::strip_limit($sql);
    is($res_sql, $sql, "Not breaking subqueries");
    is($res_lim1, 0, "Returns correct default offset");
    is($res_lim2, undef, "Returns correct default LIMIT");

    # Now the same thing, but we want it to remove the LIMIT from the end

    my $test_sql = $res_sql . " LIMIT 242";
    ($res_sql, $res_lim1, $res_lim2) = C4::Reports::Guided::strip_limit($test_sql);
    # The replacement drops a ' ' where the limit was
    is(trim($res_sql), $sql, "Correctly removes only final LIMIT");
    is($res_lim1, 0, "Returns correct default offset");
    is($res_lim2, 242, "Returns correct extracted LIMIT");

    $test_sql = $res_sql . " LIMIT 13,242";
    ($res_sql, $res_lim1, $res_lim2) = C4::Reports::Guided::strip_limit($test_sql);
    # The replacement drops a ' ' where the limit was
    is(trim($res_sql), $sql, "Correctly removes only final LIMIT (with offset)");
    is($res_lim1, 13, "Returns correct extracted offset");
    is($res_lim2, 242, "Returns correct extracted LIMIT");

    # After here is the simpler case, where there isn't a WHERE clause to worry
    # about.

    # First case with nothing to change
    $sql = "SELECT * FROM items";
    ($res_sql, $res_lim1, $res_lim2) = C4::Reports::Guided::strip_limit($sql);
    is($res_sql, $sql, "Not breaking simple queries");
    is($res_lim1, 0, "Returns correct default offset");
    is($res_lim2, undef, "Returns correct default LIMIT");

    $test_sql = $sql . " LIMIT 242";
    ($res_sql, $res_lim1, $res_lim2) = C4::Reports::Guided::strip_limit($test_sql);
    is(trim($res_sql), $sql, "Correctly removes LIMIT in simple case");
    is($res_lim1, 0, "Returns correct default offset");
    is($res_lim2, 242, "Returns correct extracted LIMIT");

    $test_sql = $sql . " LIMIT 13,242";
    ($res_sql, $res_lim1, $res_lim2) = C4::Reports::Guided::strip_limit($test_sql);
    is(trim($res_sql), $sql, "Correctly removes LIMIT in simple case (with offset)");
    is($res_lim1, 13, "Returns correct extracted offset");
    is($res_lim2, 242, "Returns correct extracted LIMIT");
};

$_->delete for Koha::AuthorisedValues->search({ category => 'XXX' });
Koha::AuthorisedValue->new({category => 'LOC'})->store;

subtest 'GetReservedAuthorisedValues' => sub {
    plan tests => 1;
    # This one will catch new reserved words not added
    # to GetReservedAuthorisedValues
    my %test_authval = (
        'date' => 1,
        'branches' => 1,
        'itemtypes' => 1,
        'cn_source' => 1,
        'categorycode' => 1,
        'biblio_framework' => 1,
    );

    my $reserved_authorised_values = GetReservedAuthorisedValues();
    is_deeply(\%test_authval, $reserved_authorised_values,
                'GetReservedAuthorisedValues returns a fixed list');
};

subtest 'IsAuthorisedValueValid' => sub {
    plan tests => 8;
    ok( IsAuthorisedValueValid('LOC'),
        'User defined authorised value category is valid');

    ok( ! IsAuthorisedValueValid('XXX'),
        'Not defined authorised value category is invalid');

    # Loop through the reserved authorised values
    foreach my $authorised_value ( keys %{GetReservedAuthorisedValues()} ) {
        ok( IsAuthorisedValueValid($authorised_value),
            '\''.$authorised_value.'\' is a reserved word, and thus a valid authorised value');
    }
};

subtest 'GetParametersFromSQL+ValidateSQLParameters' => sub  {
    plan tests => 3;
    my $test_query_1 = "
        SELECT date_due
        FROM old_issues
        WHERE YEAR(timestamp) = <<Year|custom_list>> AND
              branchcode = <<Branch|branches>> AND
              borrowernumber = <<Borrower>>
    ";

    my @test_parameters_with_custom_list = (
        { 'name' => 'Year', 'authval' => 'custom_list' },
        { 'name' => 'Branch', 'authval' => 'branches' },
        { 'name' => 'Borrower', 'authval' => undef }
    );

    is_deeply( GetParametersFromSQL($test_query_1), \@test_parameters_with_custom_list,
        'SQL params are correctly parsed');

    my @problematic_parameters = ();
    push @problematic_parameters, { 'name' => 'Year', 'authval' => 'custom_list' };
    is_deeply( ValidateSQLParameters( $test_query_1 ),
               \@problematic_parameters,
               '\'custom_list\' not a valid category' );

    my $test_query_2 = "
        SELECT date_due
        FROM old_issues
        WHERE YEAR(timestamp) = <<Year|date>> AND
              branchcode = <<Branch|branches>> AND
              borrowernumber = <<Borrower|LOC>>
    ";

    is_deeply( ValidateSQLParameters( $test_query_2 ),
        [],
        'All parameters valid, empty problematic authvals list'
    );
};

subtest 'get_saved_reports' => sub {
    plan tests => 16;
    my $dbh = C4::Context->dbh;
    $dbh->do(q|DELETE FROM saved_sql|);
    $dbh->do(q|DELETE FROM saved_reports|);

    #Test save_report
    my $count = scalar @{ get_saved_reports() };
    is( $count, 0, "There is no report" );

    my @report_ids;
    foreach my $ii ( 1..3 ) {
        my $id = $builder->build({ source => 'Borrower' })->{ borrowernumber };
        push @report_ids, save_report({
            borrowernumber => $id,
            sql            => "SQL$id",
            name           => "Name$id",
            area           => "area$ii", # ii vs id area is varchar(6)
            group          => "group$id",
            subgroup       => "subgroup$id",
            type           => "type$id",
            notes          => "note$id",
            cache_expiry   => undef,
            public         => 0,
        });
        $count++;
    }
    like( $report_ids[0], '/^\d+$/', "Save_report returns an id for first" );
    like( $report_ids[1], '/^\d+$/', "Save_report returns an id for second" );
    like( $report_ids[2], '/^\d+$/', "Save_report returns an id for third" );

    is( scalar @{ get_saved_reports() },
        $count, "$count reports have been added" );

    ok( 0 < scalar @{ get_saved_reports( $report_ids[0] ) }, "filter takes report id" );

    #Test delete_report
    is (delete_report(),undef, "Without id delete_report returns undef");

    is( delete_report( $report_ids[0] ), 1, "report 1 is deleted" );
    $count--;

    is( scalar @{ get_saved_reports() }, $count, "Report1 has been deleted" );

    is( delete_report( $report_ids[1], $report_ids[2] ), 2, "report 2 and 3 are deleted" );
    $count -= 2;

    is( scalar @{ get_saved_reports() },
        $count, "Report2 and report3 have been deleted" );

    my $sth = execute_query('SELECT COUNT(*) FROM systempreferences', 0, 10);
    my $results = $sth->fetchall_arrayref;
    is(scalar @$results, 1, 'running a query returned a result');

    my $version = C4::Context->preference('Version');
    $sth = execute_query(
        'SELECT value FROM systempreferences WHERE variable = ?',
        0,
        10,
        [ 'Version' ],
    );
    $results = $sth->fetchall_arrayref;
    is_deeply(
        $results,
        [ [ $version ] ],
        'running a query with a parameter returned the expected result'
    );

    # for next test, we want to let execute_query capture any SQL errors
    $dbh->{RaiseError} = 0;
    my $errors;
    warning_like { ($sth, $errors) = execute_query(
            'SELECT surname FRM borrowers',  # error in the query is intentional
            0, 10 ) }
            qr/^DBD::mysql::st execute failed: You have an error in your SQL syntax;/,
            "Wrong SQL syntax raises warning";
    ok(
        defined($errors) && exists($errors->{queryerr}),
        'attempting to run a report with an SQL syntax error returns error message (Bug 12214)'
    );

    is_deeply( get_report_areas(), [ 'CIRC', 'CAT', 'PAT', 'ACQ', 'ACC', 'SER' ],
        "get_report_areas returns the correct array of report areas");
};

subtest 'Ensure last_run is populated' => sub {
    plan tests => 3;

    my $rs = Koha::Database->new()->schema()->resultset('SavedSql');

    my $report = $rs->new(
        {
            report_name => 'Test Report',
            savedsql    => 'SELECT * FROM branches',
            notes       => undef,
        }
    )->insert();

    is( $report->last_run, undef, 'Newly created report has null last_run ' );

    execute_query( $report->savedsql, undef, undef, undef, $report->id );
    $report->discard_changes();

    isnt( $report->last_run, undef, 'First run of report populates last_run' );

    my $previous_last_run = $report->last_run;
    sleep(1); # last_run is stored to the second, so we need to ensure at least one second has passed between runs
    execute_query( $report->savedsql, undef, undef, undef, $report->id );
    $report->discard_changes();

    isnt( $report->last_run, $previous_last_run, 'Second run of report updates last_run' );
};

subtest 'convert_sql' => sub {
    plan tests => 4;

    my $sql = q|
    SELECT biblionumber, ExtractValue(marcxml,
'count(//datafield[@tag="505"])') AS count505
    FROM biblioitems
    HAVING count505 > 1|;
    my $expected_converted_sql = q|
    SELECT biblionumber, ExtractValue(metadata,
'count(//datafield[@tag="505"])') AS count505
    FROM biblio_metadata
    HAVING count505 > 1|;

    is( C4::Reports::Guided::convert_sql( $sql ), $expected_converted_sql, "Simple query should have been correctly converted");

    $sql = q|
    SELECT biblionumber, substring(
ExtractValue(marcxml,'//controlfield[@tag="008"]'), 8,4 ) AS 'PUB DATE',
title
    FROM biblioitems
    INNER JOIN biblio USING (biblionumber)
    WHERE biblionumber = 14|;

    $expected_converted_sql = q|
    SELECT biblionumber, substring(
ExtractValue(metadata,'//controlfield[@tag="008"]'), 8,4 ) AS 'PUB DATE',
title
    FROM biblio_metadata
    INNER JOIN biblio USING (biblionumber)
    WHERE biblionumber = 14|;
    is( C4::Reports::Guided::convert_sql( $sql ), $expected_converted_sql, "Query with biblio info should have been correctly converted");

    $sql = q|
    SELECT concat(b.title, ' ', ExtractValue(m.marcxml,
'//datafield[@tag="245"]/subfield[@code="b"]')) AS title, b.author,
count(h.reservedate) AS 'holds'
    FROM biblio b
    LEFT JOIN biblioitems m USING (biblionumber)
    LEFT JOIN reserves h ON (b.biblionumber=h.biblionumber)
    GROUP BY b.biblionumber
    HAVING count(h.reservedate) >= 42|;

    $expected_converted_sql = q|
    SELECT concat(b.title, ' ', ExtractValue(m.metadata,
'//datafield[@tag="245"]/subfield[@code="b"]')) AS title, b.author,
count(h.reservedate) AS 'holds'
    FROM biblio b
    LEFT JOIN biblio_metadata m USING (biblionumber)
    LEFT JOIN reserves h ON (b.biblionumber=h.biblionumber)
    GROUP BY b.biblionumber
    HAVING count(h.reservedate) >= 42|;
    is( C4::Reports::Guided::convert_sql( $sql ), $expected_converted_sql, "Query with 2 joins should have been correctly converted");

    $sql = q|
    SELECT t1.marcxml AS first, t2.marcxml AS second,
    FROM biblioitems t1
    LEFT JOIN biblioitems t2 USING ( biblionumber )|;

    $expected_converted_sql = q|
    SELECT t1.metadata AS first, t2.metadata AS second,
    FROM biblio_metadata t1
    LEFT JOIN biblio_metadata t2 USING ( biblionumber )|;
    is( C4::Reports::Guided::convert_sql( $sql ), $expected_converted_sql, "Query with multiple instances of marcxml and biblioitems should have them all replaced");
};

$schema->storage->txn_rollback;

sub trim {
    my ($s) = @_;
    $s =~ s/^\s*(.*?)\s*$/$1/s;
    return $s;
}