use strict;
use warnings;

use Test::Fatal;
use Test::More 0.88;

use DateTime;

my %vals = (
    year       => 50,
    month      => 3,
    day        => 15,
    hour       => 10,
    minute     => 55,
    second     => 17,
    nanosecond => 1234,
);

{
    my $dt = DateTime->new(%vals);
    $dt->truncate( to => 'second' );
    foreach my $f (qw( year month day hour minute second )) {
        is( $dt->$f(), $vals{$f}, "$f should be $vals{$f}" );
    }

    foreach my $f (qw( nanosecond )) {
        is( $dt->$f(), 0, "$f should be 0" );
    }
}

{
    my $dt = DateTime->new(%vals);
    $dt->truncate( to => 'minute' );
    foreach my $f (qw( year month day hour minute )) {
        is( $dt->$f(), $vals{$f}, "$f should be $vals{$f}" );
    }

    foreach my $f (qw( second nanosecond )) {
        is( $dt->$f(), 0, "$f should be 0" );
    }
}

{
    my $dt = DateTime->new(%vals);
    $dt->truncate( to => 'hour' );
    foreach my $f (qw( year month day hour )) {
        is( $dt->$f(), $vals{$f}, "$f should be $vals{$f}" );
    }

    foreach my $f (qw( minute second nanosecond )) {
        is( $dt->$f(), 0, "$f should be 0" );
    }
}

{
    my $dt = DateTime->new(%vals);
    $dt->truncate( to => 'day' );
    foreach my $f (qw( year month day )) {
        is( $dt->$f(), $vals{$f}, "$f should be $vals{$f}" );
    }

    foreach my $f (qw( hour minute second nanosecond )) {
        is( $dt->$f(), 0, "$f should be 0" );
    }
}

{
    my $dt = DateTime->new(%vals);
    $dt->truncate( to => 'month' );
    foreach my $f (qw( year month )) {
        is( $dt->$f(), $vals{$f}, "$f should be $vals{$f}" );
    }

    foreach my $f (qw( day )) {
        is( $dt->$f(), 1, "$f should be 1" );
    }

    foreach my $f (qw( hour minute second nanosecond )) {
        is( $dt->$f(), 0, "$f should be 0" );
    }
}

{
    my $dt = DateTime->new(%vals);
    $dt->truncate( to => 'year' );
    foreach my $f (qw( year )) {
        is( $dt->$f(), $vals{$f}, "$f should be $vals{$f}" );
    }

    foreach my $f (qw( month day )) {
        is( $dt->$f(), 1, "$f should be 1" );
    }

    foreach my $f (qw( hour minute second nanosecond )) {
        is( $dt->$f(), 0, "$f should be 0" );
    }
}

{
    my $dt = DateTime->new( year => 2003, month => 11, day => 17 );

    for ( 1 .. 6 ) {
        my $trunc = $dt->clone->add( days => $_ )->truncate( to => 'week' );

        is( $trunc->day, 17,
            'truncate to week should always truncate to monday of week' );
    }

    {
        my $trunc = $dt->clone->add( days => 7 )->truncate( to => 'week' );

        is( $trunc->day, 24,
            'truncate to week should always truncate to monday of week' );
    }

    {
        my $dt = DateTime->new( year => 2003, month => 10, day => 2 )
            ->truncate( to => 'week' );

        is( $dt->year,  2003, 'truncation to week across month boundary' );
        is( $dt->month, 9,    'truncation to week across month boundary' );
        is( $dt->day,   29,   'truncation to week across month boundary' );
    }
}

{
    my $dt = DateTime->new(%vals);

    for my $bad (qw( seconds minutes year_foo month_bar )) {
        like(
            exception { $dt->truncate( to => $bad ) },
            qr/\QThe 'to' parameter/,
            "bad truncate parameter ($bad) throws an error"
        );
    }
}

done_testing();