<?php

namespace SilverStripe\ORM\Tests;

use SilverStripe\ORM\FieldType\DBMoney;
use SilverStripe\ORM\ManyManyList;
use SilverStripe\Core\Convert;
use SilverStripe\Dev\SapphireTest;
use SilverStripe\ORM\Tests\DataObjectTest\Player;
use SilverStripe\ORM\Tests\DataObjectTest\Team;

class ManyManyListTest extends SapphireTest {

	protected static $fixture_file = 'DataObjectTest.yml';

	public static $extra_data_objects = [
		ManyManyListTest\Category::class,
		ManyManyListTest\ExtraFieldsObject::class,
		ManyManyListTest\Product::class,
	];

	protected function getExtraDataObjects()
	{
		return array_merge(
			DataObjectTest::$extra_data_objects,
			ManyManyListTest::$extra_data_objects
		);
	}

	public function testAddCompositedExtraFields() {
		$obj = new ManyManyListTest\ExtraFieldsObject();
		$obj->write();

		$money = new DBMoney();
		$money->setAmount(100);
		$money->setCurrency('USD');

		// the actual test is that this does not generate an error in the sql.
		$obj->Clients()->add($obj, array(
			'Worth' => $money,
			'Reference' => 'Foo'
		));

		$check = $obj->Clients()->First();

		$this->assertEquals('Foo', $check->Reference, 'Basic scalar fields should exist');
		$this->assertInstanceOf(DBMoney::class, $check->Worth, 'Composite fields should exist on the record');
		$this->assertEquals(100, $check->Worth->getAmount());
	}

	public function testCreateList() {
		$list = ManyManyList::create(Team::class,'DataObjectTest_Team_Players', 'DataObjectTest_TeamID',
			'DataObjectTest_PlayerID');
		$this->assertEquals(2, $list->count());
	}


	public function testRelationshipEmptyOnNewRecords() {
		// Relies on the fact that (unrelated) teams exist in the fixture file already
		$newPlayer = new Player(); // many_many Teams
		$this->assertEquals(array(), $newPlayer->Teams()->column('ID'));
	}

	public function testAddingSingleDataObjectByReference() {
		$player1 = $this->objFromFixture(Player::class, 'player1');
		$team1 = $this->objFromFixture(Team::class, 'team1');
		$player1->Teams()->add($team1);
		$player1->flushCache();

		$compareTeams = new ManyManyList(Team::class,'DataObjectTest_Team_Players', 'DataObjectTest_TeamID',
			'DataObjectTest_PlayerID');
		$compareTeams = $compareTeams->forForeignID($player1->ID);
		$this->assertEquals($player1->Teams()->column('ID'),$compareTeams->column('ID'),
			"Adding single record as DataObject to many_many");
	}

	public function testRemovingSingleDataObjectByReference() {
		$player1 = $this->objFromFixture(Player::class, 'player1');
		$team1 = $this->objFromFixture(Team::class, 'team1');
		$player1->Teams()->remove($team1);
		$player1->flushCache();
		$compareTeams = new ManyManyList(Team::class,'DataObjectTest_Team_Players', 'DataObjectTest_TeamID',
			'DataObjectTest_PlayerID');
		$compareTeams = $compareTeams->forForeignID($player1->ID);
		$this->assertEquals($player1->Teams()->column('ID'),$compareTeams->column('ID'),
			"Removing single record as DataObject from many_many");
	}

	public function testAddingSingleDataObjectByID() {
		$player1 = $this->objFromFixture(Player::class, 'player1');
		$team1 = $this->objFromFixture(Team::class, 'team1');
		$player1->Teams()->add($team1->ID);
		$player1->flushCache();
		$compareTeams = new ManyManyList(Team::class,'DataObjectTest_Team_Players', 'DataObjectTest_TeamID',
			'DataObjectTest_PlayerID');
		$compareTeams = $compareTeams->forForeignID($player1->ID);
		$this->assertEquals($player1->Teams()->column('ID'), $compareTeams->column('ID'),
			"Adding single record as ID to many_many");
	}

	public function testRemoveByID() {
		$player1 = $this->objFromFixture(Player::class, 'player1');
		$team1 = $this->objFromFixture(Team::class, 'team1');
		$player1->Teams()->removeByID($team1->ID);
		$player1->flushCache();
		$compareTeams = new ManyManyList(Team::class,'DataObjectTest_Team_Players', 'DataObjectTest_TeamID',
			'DataObjectTest_PlayerID');
		$compareTeams = $compareTeams->forForeignID($player1->ID);
		$this->assertEquals($player1->Teams()->column('ID'), $compareTeams->column('ID'),
			"Removing single record as ID from many_many");
	}

	public function testSetByIdList() {
		$player1 = $this->objFromFixture(Player::class, 'player1');
		$team1 = $this->objFromFixture(Team::class, 'team1');
		$team2 = $this->objFromFixture(Team::class, 'team2');
		$player1->Teams()->setByIdList(array($team1->ID, $team2->ID));
		$this->assertEquals(array($team1->ID, $team2->ID), $player1->Teams()->sort('Title')->column());
		$player1->Teams()->setByIdList(array($team1->ID));
		$this->assertEquals(array($team1->ID), $player1->Teams()->sort('Title')->column());
		$player1->Teams()->setByIdList(array($team2->ID));
		$this->assertEquals(array($team2->ID), $player1->Teams()->sort('Title')->column());
	}

	public function testAddingWithMultipleForeignKeys() {
		$newPlayer = new Player();
		$newPlayer->write();
		$team1 = $this->objFromFixture(Team::class, 'team1');
		$team2 = $this->objFromFixture(Team::class, 'team2');

		$playersTeam1Team2 = Team::get()->relation('Players')
			->forForeignID(array($team1->ID, $team2->ID));
		$playersTeam1Team2->add($newPlayer);
		$this->assertEquals(
			array($team1->ID, $team2->ID),
			$newPlayer->Teams()->sort('Title')->column('ID')
		);
	}

	public function testAddingExistingDoesntRemoveExtraFields() {
		$player = new Player();
		$player->write();
		$team1 = $this->objFromFixture(Team::class, 'team1');

		$team1->Players()->add($player, array('Position' => 'Captain'));
		$this->assertEquals(
			array('Position' => 'Captain'),
			$team1->Players()->getExtraData('Teams', $player->ID),
			'Writes extrafields'
		);

		$team1->Players()->add($player);
		$this->assertEquals(
			array('Position' => 'Captain'),
			$team1->Players()->getExtraData('Teams', $player->ID),
			'Retains extrafields on subsequent adds with NULL fields'
		);

		$team1->Players()->add($player, array('Position' => 'Defense'));
		$this->assertEquals(
			array('Position' => 'Defense'),
			$team1->Players()->getExtraData('Teams', $player->ID),
			'Updates extrafields on subsequent adds with fields'
		);

		$team1->Players()->add($player, array('Position' => null));
		$this->assertEquals(
			array('Position' => null),
			$team1->Players()->getExtraData('Teams', $player->ID),
			'Allows clearing of extrafields on subsequent adds'
		);
	}

	public function testSubtractOnAManyManyList() {
		$allList = ManyManyList::create(
			Player::class,
			'DataObjectTest_Team_Players',
			'DataObjectTest_PlayerID',
			'DataObjectTest_TeamID'
		);
		$this->assertEquals(3, $allList->count(),
			'Precondition; we have all 3 players connected to a team in the list');

		$teamOneID = $this->idFromFixture(Team::class, 'team1');
		$teamTwoID = $this->idFromFixture(Team::class, 'team2');

		// Captain 1 belongs to one team; team1
		$captain1 = $this->objFromFixture(Player::class, 'captain1');
		$this->assertEquals(array($teamOneID),$captain1->Teams()->column("ID"),
			'Precondition; player2 belongs to team1');

		// Player 2 belongs to both teams: team1, team2
		$player2 = $this->objFromFixture(Player::class, 'player2');
		$this->assertEquals(array($teamOneID,$teamTwoID), $player2->Teams()->sort('Title')->column('ID'),
			'Precondition; player2 belongs to team1 and team2');

		// We want to find the teams for player2 where the captain does not belong to
		$teamsWithoutTheCaptain = $player2->Teams()->subtract($captain1->Teams());

		// Assertions
		$this->assertEquals(1, $teamsWithoutTheCaptain->count(),
			'The ManyManyList should onlu contain one team');
		$this->assertEquals($teamTwoID, $teamsWithoutTheCaptain->first()->ID,
			'The ManyManyList contains the wrong team');
	}

	public function testRemoveAll() {
		$first = new Team();
		$first->write();

		$second = new Team();
		$second->write();

		$firstPlayers = $first->Players();
		$secondPlayers = $second->Players();

		$a = new Player();
		$a->ShirtNumber = 'a';
		$a->write();

		$b = new Player();
		$b->ShirtNumber = 'b';
		$b->write();

		$firstPlayers->add($a);
		$firstPlayers->add($b);

		$secondPlayers->add($a);
		$secondPlayers->add($b);

		$this->assertEquals(array('a', 'b'), $firstPlayers->sort('ShirtNumber')->column('ShirtNumber'));
		$this->assertEquals(array('a', 'b'), $secondPlayers->sort('ShirtNumber')->column('ShirtNumber'));

		$firstPlayers->removeAll();

		$this->assertEquals(0, count($firstPlayers));
		$this->assertEquals(2, count($secondPlayers));

		$firstPlayers->removeAll();

		$firstPlayers->add($a);
		$firstPlayers->add($b);

		$this->assertEquals(array('a', 'b'), $firstPlayers->sort('ShirtNumber')->column('ShirtNumber'));

		$firstPlayers->filter('ShirtNumber', 'b')->removeAll();

		$this->assertEquals(array('a'), $firstPlayers->column('ShirtNumber'));
		$this->assertEquals(array('a', 'b'), $secondPlayers->sort('ShirtNumber')->column('ShirtNumber'));

		$this->assertNotNull(Player::get()->byID($a->ID));
		$this->assertNotNull(Player::get()->byID($b->ID));
	}

	public function testAppendExtraFieldsToQuery() {
		$list = new ManyManyList(
			ManyManyListTest\ExtraFieldsObject::class,
			'ManyManyListTest_ExtraFields_Clients',
			'ManyManyListTest_ExtraFieldsID',
			'ChildID', array(
				'Worth' => 'Money',
				'Reference' => 'Varchar'
			)
		);

		// ensure that ManyManyListTest_ExtraFields_Clients.ValueCurrency is
		// selected.
		$expected = 'SELECT DISTINCT "ManyManyListTest_ExtraFields_Clients"."WorthCurrency",'
			.' "ManyManyListTest_ExtraFields_Clients"."WorthAmount", "ManyManyListTest_ExtraFields_Clients"."Reference",'
			.' "ManyManyListTest_ExtraFields"."ClassName", "ManyManyListTest_ExtraFields"."LastEdited",'
			.' "ManyManyListTest_ExtraFields"."Created", "ManyManyListTest_ExtraFields"."ID",'
			.' CASE WHEN "ManyManyListTest_ExtraFields"."ClassName" IS NOT NULL THEN'
			.' "ManyManyListTest_ExtraFields"."ClassName" ELSE '. Convert::raw2sql(ManyManyListTest\ExtraFieldsObject::class, true)
			.' END AS "RecordClassName" FROM "ManyManyListTest_ExtraFields" INNER JOIN'
			.' "ManyManyListTest_ExtraFields_Clients" ON'
			.' "ManyManyListTest_ExtraFields_Clients"."ManyManyListTest_ExtraFieldsID" ='
			.' "ManyManyListTest_ExtraFields"."ID"';

		$this->assertSQLEquals($expected, $list->sql($parameters));
	}

	public function testFilteringOnPreviouslyJoinedTable() {

		/** @var ManyManyListTest\Category $category */
		$category = $this->objFromFixture(ManyManyListTest\Category::class, 'categorya');

		/** @var ManyManyList $productsRelatedToProductB */
		$productsRelatedToProductB = $category->Products()->filter('RelatedProducts.Title', 'Product B');

		$this->assertEquals(1, $productsRelatedToProductB->count());
	}


}