<?php

namespace WP_Ultimo\Models;

use WP_Error;
use WP_UnitTestCase;

class Discount_Code_Test extends WP_UnitTestCase {

	/**
	 * Tests that a valid discount code returns true.
	 */
	public function test_is_valid_active_discount_code() {
		$discount_code = new Discount_Code();
		$discount_code->set_active( true );

		$result = $discount_code->is_valid();

		$this->assertTrue( $result );
	}

	/**
	 * Tests that an inactive discount code returns an error.
	 */
	public function test_is_valid_inactive_discount_code() {
		$discount_code = new Discount_Code();
		$discount_code->set_active( false );

		$result = $discount_code->is_valid();

		$this->assertInstanceOf( WP_Error::class, $result );
		$this->assertEquals( 'discount_code', $result->get_error_code() );
		$this->assertEquals( 'This coupon code is not valid.', $result->get_error_message() );
	}

	/**
	 * Tests that a discount code with max uses returns an error after being used maximum times.
	 */
	public function test_is_valid_max_uses_exceeded() {
		$discount_code = new Discount_Code();
		$discount_code->set_active( true );
		$discount_code->set_max_uses( 5 );
		$discount_code->set_uses( 5 );

		$result = $discount_code->is_valid();

		$this->assertInstanceOf( WP_Error::class, $result );
		$this->assertEquals( 'discount_code', $result->get_error_code() );
		$this->assertEquals( 'This discount code was already redeemed the maximum amount of times allowed.',
			$result->get_error_message() );
	}

	/**
	 * Tests that a discount code before the start date is invalid.
	 */
	public function test_is_valid_before_start_date() {
		$discount_code = new Discount_Code();
		$discount_code->set_active( true );
		$discount_code->set_date_start( date( 'Y-m-d H:i:s', strtotime( '+1 day' ) ) );

		$result = $discount_code->is_valid();

		$this->assertInstanceOf( WP_Error::class, $result );
		$this->assertEquals( 'discount_code', $result->get_error_code() );
		$this->assertEquals( 'This coupon code is not valid.', $result->get_error_message() );
	}

	/**
	 * Tests that a discount code after the expiration date is invalid.
	 */
	public function test_is_valid_after_expiration_date() {
		$discount_code = new Discount_Code();
		$discount_code->set_active( true );
		$discount_code->set_date_expiration( date( 'Y-m-d H:i:s', strtotime( '-1 day' ) ) );

		$result = $discount_code->is_valid();

		$this->assertInstanceOf( WP_Error::class, $result );
		$this->assertEquals( 'discount_code', $result->get_error_code() );
		$this->assertEquals( 'This coupon code is not valid.', $result->get_error_message() );
	}

	/**
	 * Tests that a discount code limited to specific products returns true for allowed products.
	 */
	public function test_is_valid_for_allowed_product() {
		$product_id    = 123;
		$discount_code = new Discount_Code();
		$discount_code->set_active( true );
		$discount_code->set_limit_products( true );
		$discount_code->set_allowed_products( [ $product_id ] );

		$result = $discount_code->is_valid( $product_id );

		$this->assertTrue( $result );
	}

	/**
	 * Tests that a discount code limited to specific products returns an error for disallowed products.
	 */
	public function test_is_valid_for_disallowed_product() {
		$allowed_product_id    = 123;
		$disallowed_product_id = 456;
		$discount_code         = new Discount_Code();
		$discount_code->set_active( true );
		$discount_code->set_limit_products( true );
		$discount_code->set_allowed_products( [ $allowed_product_id ] );

		$result = $discount_code->is_valid( $disallowed_product_id );

		$this->assertInstanceOf( WP_Error::class, $result );
		$this->assertEquals( 'discount_code', $result->get_error_code() );
		$this->assertEquals( 'This coupon code is not valid.', $result->get_error_message() );
	}

	/**
	 * Tests that a discount code with no product limits returns true.
	 */
	public function test_is_valid_no_product_limits() {
		$discount_code = new Discount_Code();
		$discount_code->set_active( true );
		$discount_code->set_limit_products( false );

		$result = $discount_code->is_valid();

		$this->assertTrue( $result );
	}
}