<?php declare(strict_types=1);
/*
 * This file is part of sebastian/code-unit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace SebastianBergmann\CodeUnit;

use function range;
use function realpath;
use PHPUnit\Framework\Attributes\CoversClass;
use PHPUnit\Framework\Attributes\Small;
use PHPUnit\Framework\Attributes\TestDox;
use PHPUnit\Framework\Attributes\Ticket;
use PHPUnit\Framework\Attributes\UsesClass;
use PHPUnit\Framework\TestCase;
use SebastianBergmann\CodeUnit\Fixture\ClassUsingTraitUsingTrait;
use SebastianBergmann\CodeUnit\Fixture\FixtureAnotherChildClass;
use SebastianBergmann\CodeUnit\Fixture\FixtureAnotherParentClass;
use SebastianBergmann\CodeUnit\Fixture\FixtureClass;
use SebastianBergmann\CodeUnit\Fixture\FixtureClassWithTrait;
use SebastianBergmann\CodeUnit\Fixture\FixtureInterface;
use SebastianBergmann\CodeUnit\Fixture\FixtureTrait;
use SebastianBergmann\CodeUnit\Fixture\Getopt;
use SebastianBergmann\CodeUnit\Fixture\TraitOne;
use SebastianBergmann\CodeUnit\Fixture\TraitTwo;
use Xyz;

#[CoversClass(Mapper::class)]
#[UsesClass(CodeUnit::class)]
#[UsesClass(CodeUnitCollection::class)]
#[UsesClass(CodeUnitCollectionIterator::class)]
#[UsesClass(ClassMethodUnit::class)]
#[UsesClass(FunctionUnit::class)]
#[Small]
final class MapperTest extends TestCase
{
    #[TestDox('Can map "function_name" string to code unit objects')]
    public function testCanMapStringWithFunctionNameToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits('SebastianBergmann\CodeUnit\Fixture\f');

        $this->assertSame('SebastianBergmann\CodeUnit\Fixture\f', $units->asArray()[0]->name());
    }

    #[TestDox('Can map "::function_name" string to code unit objects')]
    public function testCanMapStringWithFunctionNamePrefixedWithDoubleColonsToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits('::f');

        $this->assertSame('f', $units->asArray()[0]->name());
    }

    #[TestDox('Can map "ClassName" string to code unit objects')]
    public function testCanMapStringWithClassNameToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits(FixtureClass::class);

        $this->assertCount(1, $units);
        $this->assertSame(FixtureClass::class, $units->asArray()[0]->name());
    }

    public function testCanMapClassesAndTheTraitsTheyUseToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits(FixtureClassWithTrait::class);

        $this->assertCount(2, $units);
        $this->assertSame(FixtureClassWithTrait::class, $units->asArray()[0]->name());
        $this->assertSame(FixtureTrait::class, $units->asArray()[1]->name());
    }

    #[TestDox('Can map "ClassName::methodName" string to code unit objects')]
    public function testCanMapStringWithClassNameAndMethodNameToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits(FixtureClass::class . '::publicMethod');

        $this->assertSame(FixtureClass::class . '::publicMethod', $units->asArray()[0]->name());
    }

    #[TestDox('Cannot map "ClassName::methodName" string to code unit objects when method does not exist')]
    public function testCannotMapStringWithClassNameAndMethodNameToCodeUnitObjectsWhenMethodDoesNotExist(): void
    {
        $this->expectException(InvalidCodeUnitException::class);

        (new Mapper)->stringToCodeUnits(FixtureClass::class . '::doesNotExist');
    }

    #[TestDox('Can map "InterfaceName" string to code unit objects')]
    public function testCanMapStringWithInterfaceNameToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits(FixtureInterface::class);

        $this->assertSame(FixtureInterface::class, $units->asArray()[0]->name());
    }

    #[TestDox('Can map "InterfaceName::methodName" string to code unit objects')]
    public function testCanMapStringWithInterfaceNameAndMethodNameToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits(FixtureInterface::class . '::method');

        $this->assertSame(FixtureInterface::class . '::method', $units->asArray()[0]->name());
    }

    #[TestDox('Can map "TraitName" string to code unit objects')]
    public function testCanMapStringWithTraitNameToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits(FixtureTrait::class);

        $this->assertSame(FixtureTrait::class, $units->asArray()[0]->name());
    }

    #[TestDox('Can map "TraitName::methodName" string to code unit objects')]
    public function testCanMapStringWithTraitNameAndMethodNameToCodeUnitObjects(): void
    {
        $units = (new Mapper)->stringToCodeUnits(FixtureTrait::class . '::method');

        $this->assertSame(FixtureTrait::class . '::method', $units->asArray()[0]->name());
    }

    public function testCannotMapInvalidStringToCodeUnitObjects(): void
    {
        $this->expectException(InvalidCodeUnitException::class);

        (new Mapper)->stringToCodeUnits('invalid');
    }

    public function testCanMapCodeUnitObjectsToArrayWithSourceLinesInSingleFile(): void
    {
        $codeUnits = CodeUnitCollection::fromList(
            CodeUnit::forFunction('SebastianBergmann\CodeUnit\Fixture\another_function'),
            CodeUnit::forClass(FixtureAnotherParentClass::class),
            CodeUnit::forClass(FixtureAnotherChildClass::class),
        );

        $this->assertSame(
            [
                realpath(__DIR__ . '/../_fixture/file_with_multiple_code_units.php') => [
                    12,
                    13,
                    14,
                    16,
                    17,
                    18,
                    20,
                    21,
                    22,
                ],
            ],
            (new Mapper)->codeUnitsToSourceLines($codeUnits),
        );
    }

    public function testCanMapCodeUnitObjectsToArrayWithSourceLinesInMultipleFiles(): void
    {
        $codeUnits = CodeUnitCollection::fromList(
            CodeUnit::forInterface(FixtureInterface::class),
            CodeUnit::forClass(FixtureClass::class),
            CodeUnit::forClass(FixtureClass::class),
        );

        $this->assertSame(
            [
                realpath(__DIR__ . '/../_fixture/FixtureClass.php')     => range(12, 28),
                realpath(__DIR__ . '/../_fixture/FixtureInterface.php') => range(12, 15),
            ],
            (new Mapper)->codeUnitsToSourceLines($codeUnits),
        );
    }

    public function testCanMapOverlappingCodeUnitObjectsToArrayWithSourceLines(): void
    {
        $codeUnits = CodeUnitCollection::fromList(
            CodeUnit::forClass(FixtureClass::class),
            CodeUnit::forClassMethod(FixtureClass::class, 'publicMethod'),
            CodeUnit::forClassMethod(FixtureClass::class, 'protectedMethod'),
            CodeUnit::forClassMethod(FixtureClass::class, 'privateMethod'),
        );

        $this->assertSame(
            [
                realpath(__DIR__ . '/../_fixture/FixtureClass.php') => range(12, 28),
            ],
            (new Mapper)->codeUnitsToSourceLines($codeUnits),
        );
    }

    #[Ticket('https://github.com/sebastianbergmann/code-unit/issues/3')]
    public function testIssue3(): void
    {
        $units = (new Mapper)->stringToCodeUnits(Getopt::class . '::getopt');

        $this->assertSame(Getopt::class . '::getopt', $units->asArray()[0]->name());
    }

    #[Ticket('https://github.com/sebastianbergmann/code-unit/issues/8')]
    public function testIssue8(): void
    {
        $units = (new Mapper)->stringToCodeUnits(ClassUsingTraitUsingTrait::class);

        $this->assertCount(3, $units);
        $this->assertSame(ClassUsingTraitUsingTrait::class, $units->asArray()[0]->name());
        $this->assertSame(TraitTwo::class, $units->asArray()[1]->name());
        $this->assertSame(TraitOne::class, $units->asArray()[2]->name());
    }

    #[Ticket('https://github.com/sebastianbergmann/code-unit/issues/9')]
    public function testIssue9(): void
    {
        $units = (new Mapper)->stringToCodeUnits(Xyz::class . '::foobar');

        $this->assertCount(1, $units);

        $unit = $units->asArray()[0];

        $this->assertTrue($unit->isClassMethod());
        $this->assertSame(Xyz::class . '::foobar', $unit->name());

        $units = (new Mapper)->stringToCodeUnits('foobar');

        $this->assertCount(1, $units);

        $unit = $units->asArray()[0];

        $this->assertTrue($unit->isFunction());
        $this->assertSame('foobar', $unit->name());
    }
}