use Modern::Perl;
use DateTime;
use DateTime::TimeZone;

use C4::Context;

use Test::More tests => 60;

use Test::MockModule;
use Test::Warn;
use Time::HiRes qw/ gettimeofday /;
use t::lib::Mocks;

BEGIN { use_ok('Koha::DateUtils'); }

t::lib::Mocks::mock_preference('dateformat', 'us');
t::lib::Mocks::mock_preference('TimeFormat', 'This_is_not_used_but_called');

my $tz = C4::Context->tz;

isa_ok( $tz, 'DateTime::TimeZone', 'Context returns timezone object' );

my $testdate_iso = '2011-06-16';                   # Bloomsday 2011
my $dt = dt_from_string( $testdate_iso, 'iso' );

isa_ok( $dt, 'DateTime', 'dt_from_string returns a DateTime object' );

cmp_ok( $dt->ymd(), 'eq', $testdate_iso, 'Returned object matches input' );

$dt->set_hour(12);
$dt->set_minute(0);

my $date_string;

my $dateformat = C4::Context->preference('dateformat');
cmp_ok  output_pref({ dt => $dt, dateformat => $dateformat }),
        'eq',
        output_pref($dt),
        'output_pref gives an hashref or a dt';

$date_string = output_pref({ dt => $dt, dateformat => 'iso', timeformat => '24hr' });
cmp_ok $date_string, 'eq', '2011-06-16 12:00', 'iso output';

$date_string = output_pref({ dt => $dt, dateformat => 'iso', timeformat => '12hr' });
cmp_ok $date_string, 'eq', '2011-06-16 12:00 PM', 'iso output 12hr';

# "notime" doesn't actually mean anything in this context, but we
# can't pass undef or output_pref will try to access the database
$date_string = output_pref({ dt => $dt, dateformat => 'iso', timeformat => 'notime', dateonly => 1 });
cmp_ok $date_string, 'eq', '2011-06-16', 'iso output (date only)';

$date_string = output_pref({ dt => $dt, dateformat => 'us', timeformat => '24hr' });
cmp_ok $date_string, 'eq', '06/16/2011 12:00', 'us output';

$date_string = output_pref({ dt => $dt, dateformat => 'us', timeformat => '12hr' });
cmp_ok $date_string, 'eq', '06/16/2011 12:00 PM', 'us output 12hr';

$date_string = output_pref({ dt => $dt, dateformat => 'us', timeformat => 'notime', dateonly => 1 });
cmp_ok $date_string, 'eq', '06/16/2011', 'us output (date only)';

# metric should return the French Revolutionary Calendar Really
$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => '24hr' });
cmp_ok $date_string, 'eq', '16/06/2011 12:00', 'metric output';

$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => 'notime', dateonly => 1 });
cmp_ok $date_string, 'eq', '16/06/2011', 'metric output (date only)';

$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => '24hr' });
cmp_ok $date_string, 'eq', '16/06/2011 12:00',
  'output_pref preserves non midnight HH:SS';

my $dear_dirty_dublin = DateTime::TimeZone->new( name => 'Europe/Dublin' );
my $new_dt = dt_from_string( '16/06/2011', 'metric', $dear_dirty_dublin );
isa_ok( $new_dt, 'DateTime', 'Create DateTime with different timezone' );
cmp_ok( $new_dt->ymd(), 'eq', $testdate_iso,
    'Returned Dublin object matches input' );

SKIP: {
    skip "Don't test execution time of dt_from_string on slow servers", 6 if $ENV{SLOW_SERVER};
    for ( qw/ 2014-01-01 2100-01-01 9999-01-01 / ) {
        my $duration = gettimeofday();
        $new_dt = dt_from_string($_, 'iso', $dear_dirty_dublin);
        $duration = gettimeofday() - $duration;
        cmp_ok $duration, '<', 1, "Create DateTime with dt_from_string() for $_ with TZ in less than 1s";
        $duration = gettimeofday();
        output_pref( { dt => $new_dt } );
        $duration = gettimeofday() - $duration;
        cmp_ok $duration, '<', 1, "Create DateTime with output_pref() for $_ with TZ in less than 1s";
    }
};

$new_dt = dt_from_string( '2011-06-16 12:00', 'sql' );
isa_ok( $new_dt, 'DateTime', 'Create DateTime from (mysql) sql' );
cmp_ok( $new_dt->ymd(), 'eq', $testdate_iso, 'sql returns correct date' );

$new_dt = dt_from_string( $dt, 'iso' );
isa_ok( $new_dt, 'DateTime', 'Passed a DateTime dt_from_string returns it' );

my $ymd = '2012-01-01';
my $dt0 = dt_from_string( '00/01/2012', 'metric' );
isa_ok( $dt0, 'DateTime',
    'dt_from_string returns a DateTime object passed a zero metric day' );
cmp_ok( $dt0->ymd(), 'eq', $ymd, 'Returned object corrects metric day 0' );

$dt0 = dt_from_string( '01/00/2012', 'us' );
isa_ok( $dt0, 'DateTime',
    'dt_from_string returns a DateTime object passed a zero us day' );
cmp_ok( $dt0->ymd(), 'eq', $ymd, 'Returned object corrects us day 0' );

$dt0 = dt_from_string( '2012-01-00', 'iso' );
isa_ok( $dt0, 'DateTime',
    'dt_from_string returns a DateTime object passed a zero iso day' );
cmp_ok( $dt0->ymd(), 'eq', $ymd, 'Returned object corrects iso day 0' );

# Return undef if passed mysql 0 dates
$dt0 = dt_from_string( '0000-00-00', 'iso' );
is( $dt0, undef, "undefined returned for 0 iso date" );

# Return undef if passed mysql 9999-* date
my $dt9999 = dt_from_string( '9999-12-31', 'sql' );
is( $dt9999->ymd(), '9999-12-31', "dt_from_string should return a DateTime object for 9999-12-31" );

my $formatted = format_sqldatetime( '2011-06-16 12:00:07', 'metric', '24hr' );
cmp_ok( $formatted, 'eq', '16/06/2011 12:00', 'format_sqldatetime conversion' );

$formatted = format_sqldatetime( undef, 'metric' );
cmp_ok( $formatted, 'eq', q{},
    'format_sqldatetime formats undef as empty string' );

# Test the as_due_date parameter
$dt = DateTime->new(
    year       => 2013,
    month      => 12,
    day        => 11,
    hour       => 23,
    minute     => 59,
);
$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => '24hr', as_due_date => 1 });
cmp_ok $date_string, 'eq', '11/12/2013', 'as_due_date with hours and timeformat 24hr';

$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => '24hr', dateonly => 1, as_due_date => 1});
cmp_ok $date_string, 'eq', '11/12/2013', 'as_due_date without hours and timeformat 24hr';

$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => '12hr', as_due_date => 1 });
cmp_ok $date_string, 'eq', '11/12/2013', 'as_due_date with hours and timeformat 12hr';

$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => '12hr', dateonly => 1, as_due_date => 1});
cmp_ok $date_string, 'eq', '11/12/2013', 'as_due_date without hours and timeformat 12hr';

# Test as_due_date for hourly loans
$dt = DateTime->new(
    year       => 2013,
    month      => 12,
    day        => 11,
    hour       => 18,
    minute     => 35,
);
$date_string = output_pref({ dt => $dt, dateformat => 'metric', timeformat => '24hr', as_due_date => 1 });
cmp_ok $date_string, 'eq', '11/12/2013 18:35', 'as_due_date with hours and timeformat 24hr (non-midnight time)';
$date_string = output_pref({ dt => $dt, dateformat => 'us', timeformat => '12hr', as_due_date => 1 });
cmp_ok $date_string, 'eq', '12/11/2013 06:35 PM', 'as_due_date with hours and timeformat 12hr (non-midnight time)';

my $now = DateTime->now;
is( dt_from_string, $now, "Without parameter, dt_from_string should return today" );

my $module_context = new Test::MockModule('C4::Context');
$module_context->mock(
    'tz',
    sub {
        return DateTime::TimeZone->new( name => 'Europe/Lisbon' );
    }
);

$dt = dt_from_string('1979-04-01');
isa_ok( $dt, 'DateTime', 'dt_from_string should return a DateTime object if a DST is given' );

$module_context->mock(
    'tz',
    sub {
        return DateTime::TimeZone->new( name => 'Europe/Paris' );
    }
);

$dt = dt_from_string('2014-03-30 02:00:00');
isa_ok( $dt, 'DateTime', 'dt_from_string should return a DateTime object if a DST is given' );

# Test dt_from_string
t::lib::Mocks::mock_preference('dateformat', 'metric');
t::lib::Mocks::mock_preference('TimeFormat', '24hr');

# dt_from_string should take into account the dateformat pref, or the given parameter
$dt = dt_from_string('31/01/2015');
is( ref($dt), 'DateTime', '31/01/2015 is a correct date in metric format' );
is( output_pref( { dt => $dt, dateonly => 1 } ), '31/01/2015' );
$dt = eval { dt_from_string( '31/01/2015', 'iso' ); };
is( ref($dt), '', '31/01/2015 is not a correct date in iso format' );
$dt = eval { dt_from_string( '01/01/2015', 'iso' ); };
is( ref($dt), '', '01/01/2015 is not a correct date in iso format' );
$dt = eval { dt_from_string( '31/01/2015', 'us' ); };
is( ref($dt), '', '31/01/2015 is not a correct date in us format' );
$dt = dt_from_string( '01/01/2015', 'us' );
is( ref($dt), 'DateTime', '01/01/2015 is a correct date in us format' );
$dt = dt_from_string( '01.01.2015', 'dmydot' );
is( ref($dt), 'DateTime', '01.01.2015 is a correct date in dmydot format' );


# default value for hh and mm is 00:00
$dt = dt_from_string('31/01/2015');
is( output_pref( { dt => $dt } ), '31/01/2015 00:00', 'dt_from_string should generate a DT object with 00:00 as default hh:mm' );

$dt = dt_from_string('31/01/2015 12:34');
is( output_pref( { dt => $dt } ), '31/01/2015 12:34', 'dt_from_string should match hh:mm' );

$dt = dt_from_string('31/01/2015 12:34:56');
is( output_pref( { dt => $dt } ), '31/01/2015 12:34', 'dt_from_string should match hh:mm:ss' );

# date before 1900
$dt = dt_from_string('01/01/1900');
is( output_pref( { dt => $dt, dateonly => 1 } ), '01/01/1900', 'dt_from_string should manage date < 1900' );

# fallback
$dt = dt_from_string('2015-01-31 01:02:03');
is( output_pref( {dt => $dt} ), '31/01/2015 01:02', 'dt_from_string should fallback to sql format' );

# output_pref with str parameter
is( output_pref( { 'str' => $testdate_iso, dateformat => 'iso', dateonly => 1 } ), $testdate_iso, 'output_pref should handle correctly the iso parameter' );
my $output_for_invalid_date;
warning_like { $output_for_invalid_date = output_pref( { str => 'invalid_date' } ) }
             { carped => qr[^Invalid date 'invalid_date' passed to output_pref] },
             'output_pref should carp if an invalid date is passed for the str parameter';
is( $output_for_invalid_date, undef, 'output_pref should return undef if an invalid date is passed' );
warning_is { output_pref( { 'str' => $testdate_iso, dt => $dt, dateformat => 'iso', dateonly => 1 } ) }
           { carped => 'output_pref should not be called with both dt and str parameters' },
           'output_pref should carp if str and dt parameters are passed together';