<?php
/**
 * MetaPieChartTest.php
 * Copyright (c) 2017 thegrumpydictator@gmail.com
 *
 * This file is part of Firefly III.
 *
 * Firefly III 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.
 *
 * Firefly III 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 Firefly III. If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Tests\Unit\Helpers\Chart;

use Carbon\Carbon;
use FireflyIII\Helpers\Chart\MetaPieChart;
use FireflyIII\Helpers\Collector\TransactionCollectorInterface;
use FireflyIII\Helpers\Filter\NegativeAmountFilter;
use FireflyIII\Helpers\Filter\OpposingAccountFilter;
use FireflyIII\Helpers\Filter\PositiveAmountFilter;
use FireflyIII\Helpers\Filter\TransferFilter;
use FireflyIII\Models\Account;
use FireflyIII\Models\Transaction;
use FireflyIII\Models\TransactionType;
use FireflyIII\Repositories\Account\AccountRepositoryInterface;
use Illuminate\Support\Collection;
use Tests\TestCase;
use Log;

/**
 * Class MetaPieChartTest
 *
 * @SuppressWarnings(PHPMD.TooManyPublicMethods)
 * @SuppressWarnings(PHPMD.ExcessiveMethodLength)
 * @SuppressWarnings(PHPMD.CouplingBetweenObjects)
 */
class MetaPieChartTest extends TestCase
{
    /**
     *
     */
    public function setUp(): void
    {
        parent::setUp();
        Log::debug(sprintf('Now in %s.', \get_class($this)));
    }

    /**
     * @covers \FireflyIII\Helpers\Chart\MetaPieChart
     */
    public function testGenerateExpenseAccount(): void
    {
        $som        = (new Carbon())->startOfMonth();
        $eom        = (new Carbon())->endOfMonth();
        $collection = $this->fakeTransactions();
        $accounts   = [
            1 => factory(Account::class)->make(),
            2 => factory(Account::class)->make(),
        ];

        // mock collector so the correct set of journals is returned:
        // then verify the results.
        $collector = $this->mock(TransactionCollectorInterface::class);

        $collector->shouldReceive('addFilter')->withArgs([PositiveAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('removeFilter')->withArgs([NegativeAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('addFilter')->withArgs([NegativeAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('addFilter')->withArgs([OpposingAccountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('setUser')->andReturnSelf()->once();
        $collector->shouldReceive('setAccounts')->andReturnSelf()->once();
        $collector->shouldReceive('setRange')->andReturnSelf()->once();
        $collector->shouldReceive('setBudgets')->andReturnSelf()->once();
        $collector->shouldReceive('setCategories')->andReturnSelf()->once();
        $collector->shouldReceive('setTypes')->withArgs([[TransactionType::WITHDRAWAL, TransactionType::TRANSFER]])->andReturnSelf()->once();
        $collector->shouldReceive('withOpposingAccount')->andReturnSelf()->once();
        $collector->shouldReceive('getTransactions')->andReturn($collection);

        // mock all repositories:
        $accountRepos = $this->mock(AccountRepositoryInterface::class);

        $accountRepos->shouldReceive('setUser');
        $accountRepos->shouldReceive('findNull')->withArgs([1])->andReturn($accounts[1]);
        $accountRepos->shouldReceive('findNull')->withArgs([2])->andReturn($accounts[2]);

        $helper = new MetaPieChart();
        $helper->setUser($this->user());
        $helper->setStart($som);
        $helper->setEnd($eom);
        $chart = $helper->generate('expense', 'account');

        // since the set is pretty basic the result is easy to validate:
        $keys = array_keys($chart);
        $this->assertEquals($keys[0], $accounts[1]->name);
        $this->assertEquals($keys[1], $accounts[2]->name);
        $this->assertSame(0, bccomp('1000', $chart[$accounts[1]->name]));
        $this->assertSame(0, bccomp('1000', $chart[$accounts[2]->name]));

        $this->assertTrue(true);
    }

    /**
     * @covers \FireflyIII\Helpers\Chart\MetaPieChart
     */
    public function testGenerateExpenseAccountWithOthers(): void
    {
        $som        = (new Carbon())->startOfMonth();
        $eom        = (new Carbon())->endOfMonth();
        $collection = $this->fakeTransactions();
        $others     = $this->fakeOthers();
        $accounts   = [
            1 => factory(Account::class)->make(),
            2 => factory(Account::class)->make(),
        ];

        // mock collector so the correct set of journals is returned:
        // then verify the results.
        $collector = $this->mock(TransactionCollectorInterface::class);
        $collector->shouldReceive('addFilter')->withArgs([NegativeAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('addFilter')->withArgs([PositiveAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('addFilter')->withArgs([OpposingAccountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('removeFilter')->withArgs([NegativeAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('setUser')->andReturnSelf()->twice();
        $collector->shouldReceive('setAccounts')->andReturnSelf()->twice();
        $collector->shouldReceive('setRange')->andReturnSelf()->twice();
        $collector->shouldReceive('setBudgets')->andReturnSelf()->once();
        $collector->shouldReceive('setCategories')->andReturnSelf()->once();
        $collector->shouldReceive('setTypes')->withArgs([[TransactionType::WITHDRAWAL, TransactionType::TRANSFER]])->andReturnSelf()->once();
        $collector->shouldReceive('withOpposingAccount')->andReturnSelf()->once();
        $collector->shouldReceive('getTransactions')->andReturn($collection)->once();

        $collector->shouldReceive('setTypes')->withArgs([[TransactionType::WITHDRAWAL]])->andReturnSelf()->once();
        $collector->shouldReceive('getTransactions')->andReturn($others)->once();

        // mock all repositories:
        $accountRepos = $this->mock(AccountRepositoryInterface::class);

        $accountRepos->shouldReceive('setUser');
        $accountRepos->shouldReceive('findNull')->withArgs([1])->andReturn($accounts[1]);
        $accountRepos->shouldReceive('findNull')->withArgs([2])->andReturn($accounts[2]);

        $helper = new MetaPieChart();
        $helper->setCollectOtherObjects(true);
        $helper->setUser($this->user());
        $helper->setStart($som);
        $helper->setEnd($eom);
        $chart = $helper->generate('expense', 'account');

        // since the set is pretty basic the result is easy to validate:
        $keys = array_keys($chart);
        $this->assertEquals($keys[0], $accounts[1]->name);
        $this->assertEquals($keys[1], $accounts[2]->name);
        $this->assertSame(0, bccomp('1000', $chart[$accounts[1]->name]));
        $this->assertSame(0, bccomp('1000', $chart[$accounts[2]->name]));
        $this->assertSame(0, bccomp('-5000', $chart['Everything else']));

        $this->assertTrue(true);
    }


    /**
     * @covers \FireflyIII\Helpers\Chart\MetaPieChart
     */
    public function testGenerateIncomeAccount(): void
    {
        $som        = (new Carbon())->startOfMonth();
        $eom        = (new Carbon())->endOfMonth();
        $collection = $this->fakeTransactions();
        $accounts   = [
            1 => factory(Account::class)->make(),
            2 => factory(Account::class)->make(),
        ];

        // mock collector so the correct set of journals is returned:
        // then verify the results.
        $collector = $this->mock(TransactionCollectorInterface::class);

        $collector->shouldReceive('addFilter')->withArgs([NegativeAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('addFilter')->withArgs([OpposingAccountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('removeFilter')->withArgs([TransferFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('setUser')->andReturnSelf()->once();
        $collector->shouldReceive('setAccounts')->andReturnSelf()->once();
        $collector->shouldReceive('setRange')->andReturnSelf()->once();
        $collector->shouldReceive('setBudgets')->andReturnSelf()->once();
        $collector->shouldReceive('setCategories')->andReturnSelf()->once();
        $collector->shouldReceive('setTypes')->withArgs([[TransactionType::DEPOSIT, TransactionType::TRANSFER]])->andReturnSelf()->once();
        $collector->shouldReceive('withOpposingAccount')->andReturnSelf()->once();
        $collector->shouldReceive('getTransactions')->andReturn($collection);

        // mock all repositories:
        $accountRepos = $this->mock(AccountRepositoryInterface::class);

        $accountRepos->shouldReceive('setUser');
        $accountRepos->shouldReceive('findNull')->withArgs([1])->andReturn($accounts[1]);
        $accountRepos->shouldReceive('findNull')->withArgs([2])->andReturn($accounts[2]);

        $helper = new MetaPieChart();
        $helper->setUser($this->user());
        $helper->setStart($som);
        $helper->setEnd($eom);
        $chart = $helper->generate('income', 'account');

        // since the set is pretty basic the result is easy to validate:
        $keys = array_keys($chart);
        $this->assertEquals($keys[0], $accounts[1]->name);
        $this->assertEquals($keys[1], $accounts[2]->name);
        $this->assertSame(0, bccomp('1000', $chart[$accounts[1]->name]));
        $this->assertSame(0, bccomp('1000', $chart[$accounts[2]->name]));

        $this->assertTrue(true);
    }

    /**
     * @covers \FireflyIII\Helpers\Chart\MetaPieChart
     */
    public function testGenerateIncomeAccountWithOthers(): void
    {
        $som        = (new Carbon())->startOfMonth();
        $eom        = (new Carbon())->endOfMonth();
        $collection = $this->fakeTransactions();
        $others     = $this->fakeOthers();
        $accounts   = [
            1 => factory(Account::class)->make(),
            2 => factory(Account::class)->make(),
        ];

        // mock collector so the correct set of journals is returned:
        // then verify the results.
        $collector = $this->mock(TransactionCollectorInterface::class);
        $collector->shouldReceive('addFilter')->withArgs([NegativeAmountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('addFilter')->withArgs([OpposingAccountFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('removeFilter')->withArgs([TransferFilter::class])->andReturnSelf()->once();
        $collector->shouldReceive('setUser')->andReturnSelf()->twice();
        $collector->shouldReceive('setAccounts')->andReturnSelf()->twice();
        $collector->shouldReceive('setRange')->andReturnSelf()->twice();
        $collector->shouldReceive('setBudgets')->andReturnSelf()->once();
        $collector->shouldReceive('setCategories')->andReturnSelf()->once();
        $collector->shouldReceive('setTypes')->withArgs([[TransactionType::DEPOSIT, TransactionType::TRANSFER]])->andReturnSelf()->once();
        $collector->shouldReceive('withOpposingAccount')->andReturnSelf()->once();
        $collector->shouldReceive('getTransactions')->andReturn($collection)->once();

        $collector->shouldReceive('setTypes')->withArgs([[TransactionType::DEPOSIT]])->andReturnSelf()->once();
        $collector->shouldReceive('getTransactions')->andReturn($others)->once();

        // mock all repositories:
        $accountRepos = $this->mock(AccountRepositoryInterface::class);

        $accountRepos->shouldReceive('setUser');
        $accountRepos->shouldReceive('findNull')->withArgs([1])->andReturn($accounts[1]);
        $accountRepos->shouldReceive('findNull')->withArgs([2])->andReturn($accounts[2]);

        $helper = new MetaPieChart();
        $helper->setCollectOtherObjects(true);
        $helper->setUser($this->user());
        $helper->setStart($som);
        $helper->setEnd($eom);
        $chart = $helper->generate('income', 'account');

        // since the set is pretty basic the result is easy to validate:
        $keys = array_keys($chart);
        $this->assertEquals($keys[0], $accounts[1]->name);
        $this->assertEquals($keys[1], $accounts[2]->name);
        $this->assertSame(0, bccomp('1000', $chart[$accounts[1]->name]));
        $this->assertSame(0, bccomp('1000', $chart[$accounts[2]->name]));
        $this->assertSame(0, bccomp('1000', $chart['Everything else']));

        $this->assertTrue(true);
    }

    /**
     * @return Collection
     */
    private function fakeOthers(): Collection
    {
        $set = new Collection;

        for ($i = 0; $i < 30; ++$i) {
            $transaction = new Transaction;

            // basic fields.
            $transaction->opposing_account_id             = 3;
            $transaction->transaction_journal_budget_id   = 3;
            $transaction->transaction_budget_id           = 3;
            $transaction->transaction_journal_category_id = 3;
            $transaction->transaction_category_id         = 3;
            $transaction->transaction_amount              = '100';
            $set->push($transaction);
        }

        return $set;
    }

    /**
     * @return Collection
     */
    private function fakeTransactions(): Collection
    {
        $set = new Collection;
        for ($i = 0; $i < 10; ++$i) {
            $transaction = new Transaction;

            // basic fields.
            $transaction->opposing_account_id             = 1;
            $transaction->transaction_journal_budget_id   = 1;
            $transaction->transaction_budget_id           = 1;
            $transaction->transaction_journal_category_id = 1;
            $transaction->transaction_category_id         = 1;
            $transaction->transaction_amount              = '100';
            $set->push($transaction);
        }

        for ($i = 0; $i < 10; ++$i) {
            $transaction = new Transaction;

            // basic fields.
            $transaction->opposing_account_id             = 2;
            $transaction->transaction_journal_budget_id   = 2;
            $transaction->transaction_budget_id           = 2;
            $transaction->transaction_journal_category_id = 2;
            $transaction->transaction_category_id         = 2;
            $transaction->transaction_amount              = '100';
            $set->push($transaction);
        }

        return $set;
    }
}