<?php
declare(strict_types=1);

namespace Tests\Category;

use App\Category\Category;
use App\Category\Http\CategoryController as CategoryController;
use App\Category\CategoryServiceInterface;
use App\Shared\Http\FlashServiceInterface;
use App\Shared\Pagination\PaginatedResult;
use PHPUnit\Framework\MockObject\MockObject;
use Tests\ControllerTestBase;

/**
 * Tests unitaires pour CategoryController.
 *
 * Couvre index(), create() et delete() :
 * rendu de la liste, création réussie, erreur de création,
 * suppression avec catégorie introuvable, succès et erreur métier.
 */
#[\PHPUnit\Framework\Attributes\AllowMockObjectsWithoutExpectations]
final class CategoryControllerTest extends ControllerTestBase
{
    /** @var \Slim\Views\Twig&MockObject */
    private \Slim\Views\Twig $view;

    /** @var CategoryServiceInterface&MockObject */
    private CategoryServiceInterface $categoryService;

    /** @var FlashServiceInterface&MockObject */
    private FlashServiceInterface $flash;

    private CategoryController $controller;

    protected function setUp(): void
    {
        $this->view            = $this->makeTwigMock();
        $this->categoryService = $this->createMock(CategoryServiceInterface::class);
        $this->flash           = $this->createMock(FlashServiceInterface::class);

        $this->controller = new CategoryController(
            $this->view,
            $this->categoryService,
            $this->flash,
        );
    }

    // ── index ────────────────────────────────────────────────────────

    /**
     * index() doit rendre la vue avec la liste des catégories.
     */
    public function testIndexRendersWithCategories(): void
    {
        $this->categoryService->method('findPaginated')->willReturn(new PaginatedResult([], 0, 1, 20));

        $this->view->expects($this->once())
            ->method('render')
            ->with($this->anything(), 'admin/categories/index.twig', $this->anything())
            ->willReturnArgument(0);

        $res = $this->controller->index($this->makeGet('/admin/categories'), $this->makeResponse());

        $this->assertStatus($res, 200);
    }

    // ── create ───────────────────────────────────────────────────────

    /**
     * create() doit flasher un succès et rediriger en cas de création réussie.
     */
    public function testCreateRedirectsWithSuccessFlash(): void
    {
        $this->categoryService->method('create')->willReturn(1);

        $this->flash->expects($this->once())->method('set')
            ->with('category_success', $this->stringContains('PHP'));

        $req = $this->makePost('/admin/categories/create', ['name' => 'PHP']);
        $res = $this->controller->create($req, $this->makeResponse());

        $this->assertRedirectTo($res, '/admin/categories');
    }

    /**
     * create() doit flasher une erreur si le service lève une InvalidArgumentException.
     */
    public function testCreateRedirectsWithErrorOnInvalidArgument(): void
    {
        $this->categoryService->method('create')
            ->willThrowException(new \InvalidArgumentException('Catégorie déjà existante'));

        $this->flash->expects($this->once())->method('set')
            ->with('category_error', 'Catégorie déjà existante');

        $req = $this->makePost('/admin/categories/create', ['name' => 'Duplicate']);
        $res = $this->controller->create($req, $this->makeResponse());

        $this->assertRedirectTo($res, '/admin/categories');
    }

    /**
     * create() doit flasher une erreur générique pour toute autre exception.
     */
    public function testCreateRedirectsWithGenericErrorOnUnexpectedException(): void
    {
        $this->categoryService->method('create')
            ->willThrowException(new \RuntimeException('DB error'));

        $this->flash->expects($this->once())->method('set')
            ->with('category_error', $this->stringContains('inattendue'));

        $req = $this->makePost('/admin/categories/create', ['name' => 'PHP']);
        $res = $this->controller->create($req, $this->makeResponse());

        $this->assertRedirectTo($res, '/admin/categories');
    }

    // ── delete ───────────────────────────────────────────────────────

    /**
     * delete() doit flasher une erreur et rediriger si la catégorie est introuvable.
     */
    public function testDeleteRedirectsWithErrorWhenNotFound(): void
    {
        $this->categoryService->method('findById')->willReturn(null);

        $this->flash->expects($this->once())->method('set')
            ->with('category_error', 'Catégorie introuvable');

        $res = $this->controller->delete(
            $this->makePost('/admin/categories/delete/99'),
            $this->makeResponse(),
            ['id' => '99'],
        );

        $this->assertRedirectTo($res, '/admin/categories');
    }

    /**
     * delete() doit flasher un succès et rediriger en cas de suppression réussie.
     */
    public function testDeleteRedirectsWithSuccessFlash(): void
    {
        $category = new Category(3, 'PHP', 'php');
        $this->categoryService->method('findById')->willReturn($category);
        $this->flash->expects($this->once())->method('set')
            ->with('category_success', $this->stringContains('PHP'));

        $res = $this->controller->delete(
            $this->makePost('/admin/categories/delete/3'),
            $this->makeResponse(),
            ['id' => '3'],
        );

        $this->assertRedirectTo($res, '/admin/categories');
    }

    /**
     * delete() doit flasher une erreur si le service refuse la suppression
     * (ex: des articles sont rattachés à la catégorie).
     */
    public function testDeleteRedirectsWithErrorWhenServiceRefuses(): void
    {
        $category = new Category(3, 'PHP', 'php');
        $this->categoryService->method('findById')->willReturn($category);
        $this->categoryService->method('delete')
            ->willThrowException(new \InvalidArgumentException('Des articles utilisent cette catégorie'));

        $this->flash->expects($this->once())->method('set')
            ->with('category_error', 'Des articles utilisent cette catégorie');

        $res = $this->controller->delete(
            $this->makePost('/admin/categories/delete/3'),
            $this->makeResponse(),
            ['id' => '3'],
        );

        $this->assertRedirectTo($res, '/admin/categories');
    }

    /**
     * delete() doit passer l'identifiant de route au service findById().
     */
    public function testDeletePassesCorrectIdToService(): void
    {
        $this->categoryService->expects($this->once())
            ->method('findById')
            ->with(7)
            ->willReturn(null);

        $this->flash->method('set');

        $this->controller->delete(
            $this->makePost('/admin/categories/delete/7'),
            $this->makeResponse(),
            ['id' => '7'],
        );
    }
}