#!/usr/bin/env perl

use Modern::Perl;

use Test::More tests => 44;
use C4::Context;
use Koha::Database;
use Koha::Acquisition::Bookseller;
use Koha::Acquisition::Order;
use t::lib::TestBuilder;
use t::lib::Mocks;

# Start transaction
my $schema = Koha::Database->new()->schema();
$schema->storage->txn_begin();

my $builder = t::lib::TestBuilder->new;

my $bookseller_inc_tax = Koha::Acquisition::Bookseller->new(
    {
        name          => "Tax included",
        address1      => "bookseller's address",
        phone         => "0123456",
        active        => 1,
        listincgst    => 1,
        invoiceincgst => 1,
    }
)->store;

my $bookseller_exc_tax = Koha::Acquisition::Bookseller->new(
    {
        name          => "Tax excluded",
        address1      => "bookseller's address",
        phone         => "0123456",
        active        => 1,
        listincgst    => 0,
        invoiceincgst => 0,
    }
)->store;

my $basket_exc_tax = Koha::Acquisition::Basket->new(
    {
        basketname => 'Basket tax excluded',
        booksellerid => $bookseller_exc_tax->id,
    }
)->store;

my $order_exc_tax = Koha::Acquisition::Order->new({
    tax_rate_on_ordering  => .1965,
    tax_rate_on_receiving => .1965,
    discount  => .42,
    rrp       => 16.99,
    unitprice => "0.00",
    quantity  => 8,
    basketno => $basket_exc_tax->basketno,
});

#Vendor prices exclude tax, no rounding, ordering
t::lib::Mocks::mock_preference('OrderPriceRounding', '');
$order_exc_tax->populate_with_prices_for_ordering();

is( $order_exc_tax->rrp_tax_excluded+0      ,16.99      ,"Ordering tax excluded, no round: rrp tax excluded is rrp");
is( $order_exc_tax->rrp_tax_included+0      ,20.328535  ,"Ordering tax excluded, no round: rrp tax included is rr tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->ecost_tax_excluded+0    ,9.8542     ,"Ordering tax excluded, no round: ecost tax excluded is rrp * ( 1 - discount )");
is( $order_exc_tax->ecost_tax_included+0    ,11.7905503 ,"Ordering tax excluded, no round: ecost tax included is ecost tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->tax_value_on_ordering+0 ,15.4908024 ,"Ordering tax excluded, no round: tax value on ordering is quantity * ecost_tax_excluded * tax rate on ordering if no unitprice");

$order_exc_tax->unitprice(9.85);

$order_exc_tax->populate_with_prices_for_ordering();

is( $order_exc_tax->unitprice_tax_excluded+0      ,9.85      ,"Ordering tax excluded, no round: rrp tax excluded is rrp");
is( $order_exc_tax->unitprice_tax_included+0      ,11.785525  ,"Ordering tax excluded, no round: rrp tax included is rr tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->tax_value_on_ordering+0 ,15.4842 ,"Ordering tax excluded, no round: tax value on ordering is quantity * unitprice_tax_excluded * tax rate on ordering if unitprice");

#Vendor prices exclude tax, no rounding, receiving
$order_exc_tax->populate_with_prices_for_receiving();

is( $order_exc_tax->unitprice+0              ,9.8542     ,"Receiving tax excluded, no round, rounded ecost tax excluded = rounded unitprice : unitprice is ecost tax excluded");
is( $order_exc_tax->unitprice_tax_excluded+0 ,9.8542     ,"Receiving tax excluded, no round, rounded ecost tax excluded = rounded unitprice : unitprice tax excluded is ecost tax excluded");
is( $order_exc_tax->unitprice_tax_included+0 ,11.7905503 ,"Receiving tax excluded, no round: unitprice tax included is unitprice tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->tax_value_on_receiving+0  ,15.4908024 ,"Receiving tax excluded, no round: tax value on receiving is quantity * unitprice_tax_excluded * tax rate on receiving");


$order_exc_tax->unitprice(9.85);
#populate order with prices updates the passed in order hashref
#we need to reset after additional tests and changes

#Vendor prices exclude tax, rounding to nearest cent, ordering
t::lib::Mocks::mock_preference('OrderPriceRounding', 'nearest_cent');
$order_exc_tax->populate_with_prices_for_ordering();

is( $order_exc_tax->unitprice_tax_excluded+0      ,9.85      ,"Ordering tax excluded, round: unitprice tax excluded is unitprice");
is( $order_exc_tax->unitprice_tax_included+0      ,11.785525  ,"Ordering tax excluded, round: unitprice tax included is unitprice tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->rrp_tax_excluded+0      ,16.99      ,"Ordering tax excluded, round: rrp tax excluded is rrp");
is( $order_exc_tax->rrp_tax_included+0      ,20.328535  ,"Ordering tax excluded, round: rrp tax included is rr tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->ecost_tax_excluded+0    ,9.8542     ,"Ordering tax excluded, round: ecost tax excluded is rrp * ( 1 - discount )");
is( $order_exc_tax->ecost_tax_included+0    ,11.7905503 ,"Ordering tax excluded, round: ecost tax included is ecost tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->tax_value_on_ordering+0 ,15.4842    ,"Ordering tax excluded, round: tax value on ordering is quantity * ecost_tax_excluded * tax rate on ordering");

#Vendor prices exclude tax, no rounding, receiving
$order_exc_tax->populate_with_prices_for_receiving();

is( $order_exc_tax->unitprice_tax_excluded+0 ,9.8542     ,"Receiving tax excluded, round, rounded ecost tax excluded = rounded unitprice : unitprice tax excluded is ecost tax excluded");
is( $order_exc_tax->unitprice_tax_included+0 ,11.7905503 ,"Receiving tax excluded, round: unitprice tax included is unitprice tax excluded * (1 + tax rate on ordering)");
is( $order_exc_tax->tax_value_on_receiving+0  ,15.4842   ,"Receiving tax excluded, round: tax value on receiving is quantity * unitprice_tax_excluded * tax rate on receiving");


my $basket_inc_tax = Koha::Acquisition::Basket->new(
    {
        basketname => 'Basket tax included',
        booksellerid => $bookseller_inc_tax->id,
    }
)->store;

my $order_inc_tax = Koha::Acquisition::Order->new({
    tax_rate_on_ordering  => .1965,
    tax_rate_on_receiving => .1965,
    discount  => .42,
    rrp       => 20.33,
    unitprice => 0.00,
    quantity  => 8,
    basketno => $basket_inc_tax->basketno,
});

#Vendor prices include tax, no rounding, ordering
t::lib::Mocks::mock_preference('OrderPriceRounding', '');
$order_inc_tax->populate_with_prices_for_ordering();

is( $order_inc_tax->rrp_tax_included+0      ,20.33            ,"Ordering tax included, no round: rrp tax included is rrp");
is( $order_inc_tax->rrp_tax_excluded+0      ,16.9912244045132 ,"Ordering tax included, no round: rrp tax excluded is rrp tax included / (1 + tax rate on ordering)");
is( $order_inc_tax->ecost_tax_included+0    ,11.7914          ,"Ordering tax included, no round: ecost tax included is rrp tax included * (1 - discount)");
is( $order_inc_tax->ecost_tax_excluded+0    ,9.85491015461764 ,"Ordering tax included, no round: ecost tax excluded is rrp tax excluded * ( 1 - discount )");
is( $order_inc_tax->tax_value_on_ordering+0 ,15.4919187630589 ,"Ordering tax included, no round: tax value on ordering is ( ecost tax included - ecost tax excluded ) * quantity if no unitprice");

$order_inc_tax->unitprice(11.79);
$order_inc_tax->populate_with_prices_for_ordering();

is( $order_inc_tax->unitprice_tax_included+0 ,11.79             ,"Ordering tax included, no round: unitprice tax included is unitprice");
is( $order_inc_tax->unitprice_tax_excluded+0 ,9.85374007521939  ,"Ordering tax included, no round: unitprice tax excluded is unitprice tax included / (1 + tax_rate_on_ordering ");
is( $order_inc_tax->tax_value_on_ordering+0  ,15.4900793982449  ,"Ordering tax included, no round: tax value on ordering is ( unitprice tax included - unitprice tax excluded ) * quantity if unitprice");

#Vendor prices include tax, no rounding, receiving
$order_inc_tax->populate_with_prices_for_receiving();

is( $order_inc_tax->unitprice+0              ,11.7914          ,"Receiving tax included, no round, rounded ecost tax excluded = rounded unitprice : unitprice is ecost tax excluded");
is( $order_inc_tax->unitprice_tax_included+0 ,11.7914          ,"Receiving tax included, no round: unitprice tax included is unitprice");
is( $order_inc_tax->unitprice_tax_excluded+0 ,9.85491015461764 ,"Receiving tax included, no round: unitprice tax excluded is unitprice tax included / (1 + tax rate on receiving)");
is( $order_inc_tax->tax_value_on_receiving+0 ,15.4919187630589 ,"Receiving tax included, no round: tax value on receiving is quantity * unitprice_tax_excluded * tax rate on receiving");

#Vendor prices include tax, rounding to nearest cent, ordering
t::lib::Mocks::mock_preference('OrderPriceRounding', 'nearest_cent');
$order_inc_tax->unitprice(11.79);
$order_inc_tax->populate_with_prices_for_ordering();

is( $order_inc_tax->unitprice_tax_included+0      ,11.79      ,"Ordering tax included, round: unitprice tax included is unitprice");
is( $order_inc_tax->unitprice_tax_excluded+0,9.85374007521939 ,"Ordering tax included, round: unitprice tax excluded is unitprice tax included / (1 + tax_rate_on_ordering ");
is( $order_inc_tax->rrp_tax_included+0      ,20.33            ,"Ordering tax included, round: rrp tax included is rrp");
is( $order_inc_tax->rrp_tax_excluded+0      ,16.9912244045132 ,"Ordering tax included, round: rrp tax excluded is rounded rrp tax included * (1 + tax rate on ordering)");
is( $order_inc_tax->ecost_tax_included+0    ,11.7914          ,"Ordering tax included, round: ecost tax included is rounded rrp * ( 1 - discount )");
is( $order_inc_tax->ecost_tax_excluded+0    ,9.85491015461764 ,"Ordering tax included, round: ecost tax excluded is rounded ecost tax excluded * (1 - discount)");
is( $order_inc_tax->tax_value_on_ordering+0 ,15.52            ,"Ordering tax included, round: tax value on ordering is (ecost_tax_included - ecost_tax_excluded) * quantity");

#Vendor prices include tax, no rounding, receiving
$order_inc_tax->populate_with_prices_for_receiving();

is( $order_inc_tax->unitprice_tax_included+0 ,11.7914          ,"Receiving tax included, round: rounded ecost tax included = rounded unitprice : unitprice tax excluded is ecost tax included");
is( $order_inc_tax->unitprice_tax_excluded+0 ,9.85491015461764 ,"Receiving tax included, round: unitprice tax excluded is unitprice tax included / (1 + tax rate on ordering)");
is( $order_inc_tax->tax_value_on_receiving+0  ,15.4842         ,"Receiving tax included, round: tax value on receiving is quantity * (rounded unitprice_tax_excluded) * tax rate on receiving");


$schema->storage->txn_rollback();