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<?php

declare(strict_types=1);

namespace Drupal\Tests\field\Kernel\Number;

use Drupal\Core\Field\FieldItemInterface;
use Drupal\Core\Field\FieldItemListInterface;
use Drupal\Core\Field\Plugin\Field\FieldType\NumericItemBase;
use Drupal\Core\Form\FormState;
use Drupal\entity_test\Entity\EntityTest;
use Drupal\field\Entity\FieldConfig;
use Drupal\Tests\field\Kernel\FieldKernelTestBase;
use Drupal\field\Entity\FieldStorageConfig;

/**
 * Tests the new entity API for the number field type.
 *
 * @group field
 */
class NumberItemTest extends FieldKernelTestBase {

  /**
   * {@inheritdoc}
   */
  protected static $modules = [];

  /**
   * {@inheritdoc}
   */
  protected function setUp(): void {
    parent::setUp();

    // Create number field storages and fields for validation.
    foreach (['integer', 'float', 'decimal'] as $type) {
      FieldStorageConfig::create([
        'entity_type' => 'entity_test',
        'field_name' => 'field_' . $type,
        'type' => $type,
      ])->save();
      FieldConfig::create([
        'entity_type' => 'entity_test',
        'field_name' => 'field_' . $type,
        'bundle' => 'entity_test',
      ])->save();
    }
  }

  /**
   * Tests using entity fields of the number field type.
   */
  public function testNumberItem(): void {
    // Verify entity creation.
    $entity = EntityTest::create();
    $integer = rand(0, 10);
    $entity->field_integer = $integer;
    $float = 3.14;
    $entity->field_float = $float;
    $entity->field_decimal = '20-40';
    $violations = $entity->validate();
    $this->assertCount(1, $violations, 'Wrong decimal value causes validation error');
    $decimal = '31.3';
    $entity->field_decimal = $decimal;
    $entity->name->value = $this->randomMachineName();
    $entity->save();

    // Verify entity has been created properly.
    $id = $entity->id();
    $entity = EntityTest::load($id);
    $this->assertInstanceOf(FieldItemListInterface::class, $entity->field_integer);
    $this->assertInstanceOf(FieldItemInterface::class, $entity->field_integer[0]);
    $this->assertEquals($integer, $entity->field_integer->value);
    $this->assertEquals($integer, $entity->field_integer[0]->value);
    $this->assertInstanceOf(FieldItemListInterface::class, $entity->field_float);
    $this->assertInstanceOf(FieldItemInterface::class, $entity->field_float[0]);
    $this->assertEquals($float, $entity->field_float->value);
    $this->assertEquals($float, $entity->field_float[0]->value);
    $this->assertInstanceOf(FieldItemListInterface::class, $entity->field_decimal);
    $this->assertInstanceOf(FieldItemInterface::class, $entity->field_decimal[0]);
    $this->assertEquals((float) $decimal, $entity->field_decimal->value);
    $this->assertEquals((float) $decimal, $entity->field_decimal[0]->value);

    // Verify changing the number value.
    $new_integer = rand(11, 20);
    $new_float = rand(1001, 2000) / 100;
    $new_decimal = '18.2';
    $entity->field_integer->value = $new_integer;
    $this->assertEquals($new_integer, $entity->field_integer->value);
    $entity->field_float->value = $new_float;
    $this->assertEquals($new_float, $entity->field_float->value);
    $entity->field_decimal->value = $new_decimal;
    $this->assertEquals((float) $new_decimal, $entity->field_decimal->value);

    // Read changed entity and assert changed values.
    $entity->save();
    $entity = EntityTest::load($id);
    $this->assertEquals($new_integer, $entity->field_integer->value);
    $this->assertEquals($new_float, $entity->field_float->value);
    $this->assertEquals((float) $new_decimal, $entity->field_decimal->value);

    // Test sample item generation.
    $entity = EntityTest::create();

    // Make sure that field settings are respected by the generation.
    $entity->field_decimal
      ->getFieldDefinition()
      ->setSetting('min', 99)
      ->setSetting('max', 100);

    $entity->field_float
      ->getFieldDefinition()
      ->setSetting('min', 99)
      ->setSetting('max', 100);

    $entity->field_integer
      ->getFieldDefinition()
      ->setSetting('min', 99)
      ->setSetting('max', 100);

    $entity->field_decimal->generateSampleItems();
    $entity->field_integer->generateSampleItems();
    $entity->field_float->generateSampleItems();

    // Confirm that the generated sample values are within range.
    $this->entityValidateAndSave($entity);
  }

  /**
   * Tests constraints on numeric item fields.
   *
   * @dataProvider dataNumberFieldSettingsProvider
   *
   * @param string $type
   *   The field type.
   * @param int|float $min
   *   The minimum field value.
   * @param int|float $max
   *   The maximum field value.
   * @param int|float $value
   *   The test value.
   * @param bool $expect_constraints
   *   If TRUE this data set will trigger a validation constraint.
   * @param string $expected_constraint_message
   *   The expected constraint violation message.
   *
   * @throws \Drupal\Core\Entity\EntityStorageException
   */
  public function testConstraints($type, $min, $max, $value, $expect_constraints, $expected_constraint_message = ''): void {
    $field = FieldConfig::loadByName('entity_test', 'entity_test', 'field_' . $type);
    $field->setSetting('min', $min);
    $field->setSetting('max', $max);
    $field->save();

    $entity = EntityTest::create();
    $entity->{'field_' . $type} = $value;
    $violations = $entity->validate();
    $this->assertEquals($expect_constraints, $violations->count() > 0);
    if ($expect_constraints) {
      $this->assertEquals($expected_constraint_message, $violations->get(0)->getMessage());
    }

  }

  /**
   * Data provider for testConstraints.
   *
   * @return \Generator
   *   The test data.
   */
  public static function dataNumberFieldSettingsProvider() {
    yield ['integer', NULL, NULL, -100, FALSE];
    yield ['integer', 0, NULL, -100, TRUE, 'field_integer: the value may be no less than 0.'];
    yield ['integer', 10, NULL, 100, FALSE];
    yield ['integer', 10, NULL, 5, TRUE, 'field_integer: the value may be no less than 10.'];
    yield ['integer', 10, 20, 25, TRUE, 'field_integer: the value may be no greater than 20.'];
    yield ['integer', 10, 20, 15, FALSE];

    yield ['float', NULL, NULL, -100, FALSE];
    yield ['float', 0.003, NULL, 0.0029, TRUE, 'field_float: the value may be no less than 0.003.'];
    yield ['float', 10.05, NULL, 13.4, FALSE];
    yield ['float', 10, NULL, 9.999, TRUE, 'field_float: the value may be no less than 10.'];
    yield ['float', 1, 2, 2.5, TRUE, 'field_float: the value may be no greater than 2.'];
    yield ['float', 1, 2, 1.5, FALSE];

    yield ['decimal', NULL, NULL, -100, FALSE];
    yield ['decimal', 0.001, NULL, -0.05, TRUE, 'field_decimal: the value may be no less than 0.001.'];
    yield ['decimal', 10.05, NULL, 13.4, FALSE];
    yield ['decimal', 10, NULL, 9.999, TRUE, 'field_decimal: the value may be no less than 10.'];
    yield ['decimal', 1, 2, 2.5, TRUE, 'field_decimal: the value may be no greater than 2.'];
    yield ['decimal', 1, 2, 1.5, FALSE];
  }

  /**
   * Tests the validation of minimum and maximum values.
   *
   * @param int|float|string $min
   *   Min value to be tested.
   * @param int|float|string $max
   *   Max value to be tested.
   * @param int|float|string $value
   *   Value to be tested with min and max values.
   * @param bool $hasError
   *   Expected validation result.
   * @param string $message
   *   (optional) Error message result.
   *
   * @dataProvider dataTestMinMaxValue
   */
  public function testFormFieldMinMaxValue(int|float|string $min, int|float|string $max, int|float|string $value, bool $hasError, string $message = ''): void {
    $element = [
      '#type' => 'number',
      '#title' => 'min',
      '#default_value' => $min,
      '#element_validate' => [[NumericItemBase::class, 'validateMinAndMaxConfig']],
      '#description' => 'The minimum value that should be allowed in this field. Leave blank for no minimum.',
      '#parents' => [],
      '#name' => 'min',
    ];

    $form_state = new FormState();
    $form_state->setValue('min', $value);
    $form_state->setValue('settings', [
      'min' => $min,
      'max' => $max,
      'prefix' => '',
      'suffix' => '',
      'precision' => 10,
      'scale' => 2,
    ]);
    $completed_form = [];
    NumericItemBase::validateMinAndMaxConfig($element, $form_state, $completed_form);
    $errors = $form_state->getErrors();
    $this->assertEquals($hasError, count($errors) > 0);
    if ($errors) {
      $error = current($errors);
      $this->assertEquals($error, $message);
    }
  }

  /**
   * Data provider for testFormFieldMinMaxValue().
   *
   * @return \Generator
   *   The test data.
   */
  public static function dataTestMinMaxValue() {
    yield [1, 10, 5, FALSE, ''];
    yield [10, 5, 6, TRUE, 'The minimum value must be less than or equal to 5.'];
    yield [1, 0, 6, TRUE, 'The minimum value must be less than or equal to 0.'];
    yield [0, -2, 0.5, TRUE, 'The minimum value must be less than or equal to -2.'];
    yield [-10, -20, -5, TRUE, 'The minimum value must be less than or equal to -20.'];
    yield [1, '', -5, FALSE, ''];
    yield ['', '', '', FALSE, ''];
    yield ['2', '1', '', TRUE, 'The minimum value must be less than or equal to 1.'];
  }

}