<?php

use PHPUnit\Framework\Attributes\DataProvider;
use PHPUnit\Framework\TestCase;

/**
 * AccentInsensitiveSearchTest — regression tests ensuring all search paths
 * (public search, student preview, admin list) treat accented and
 * non-accented queries as equivalent. "Théophile" must match "Theophile",
 * "sévère" must match "severe", etc.
 */
class AccentInsensitiveSearchTest extends TestCase
{
    protected function setUp(): void
    {
        TestDatabase::resetData();
    }

    #[DataProvider('foldProvider')]
    public function testFoldStripsDiacritics(string $input, string $expected): void
    {
        $this->assertSame($expected, AccentFolding::fold($input));
    }

    public static function foldProvider(): array
    {
        return [
            'french name'       => ['Théophile', 'Theophile'],
            'lowercase + mixed' => ['sévère où ça', 'severe ou ca'],
            // Upper diacritics fold to lower base letters (LIKE is case-insensitive in SQLite,
            // so this is fine for matching; the point is É and é both fold to e).
            'upper diacritics'  => ['ÉCOLE À ö', 'eCOLE a o'],
            'cedilla'           => ['garçon', 'garcon'],
            'n tilde'           => ['señor', 'senor'],
            'umlauts'           => ['üöä', 'uoa'],
            'apex/apostrophe'   => ['l\'erg', "l'erg"],
            'empty'             => ['', ''],
            'no diacritics'     => ['plain text', 'plain text'],
        ];
    }

    public function testFoldReturnsNullForNull(): void
    {
        $this->assertNull(AccentFolding::fold(null));
    }

    public function testPublicSearchMatchedWithoutAccent(): void
    {
        TestDatabase::seedBasicThesis('TFE ac', 'Théophile Dupont', 2024);
        $db = TestDatabase::getInstance();
        $res = $db->searchTheses(['query' => 'theophile']);
        $this->assertCount(1, $res);
        $this->assertStringContainsString('Théophile', $res[0]['authors']);
    }

    public function testPublicSearchMatchedWithAccent(): void
    {
        TestDatabase::seedBasicThesis('TFE ac', 'Théophile Dupont', 2024);
        $db = TestDatabase::getInstance();
        $res = $db->searchTheses(['query' => 'Théophile']);
        $this->assertCount(1, $res);
    }

    public function testTitleSearchIgnoresAccent(): void
    {
        TestDatabase::seedBasicThesis('Sévère étude', 'Auteur', 2024);
        $db = TestDatabase::getInstance();
        $res = $db->searchTheses(['query' => 'severe']);
        $this->assertCount(1, $res);
    }

    public function testSearchReturnsNothingForMismatch(): void
    {
        TestDatabase::seedBasicThesis('Distinct Title', 'Autre Auteur', 2024);
        $db = TestDatabase::getInstance();
        $this->assertCount(0, $db->searchTheses(['query' => 'xyzzy-no-match']));
    }

    public function testAuthorNamePreviewIgnoresAccent(): void
    {
        [$authorId, $thesisId] = TestDatabase::seedBasicThesis('P', 'Théophile Dupont', 2024);
        $db = TestDatabase::getInstance();
        $this->assertCount(1, $db->getThesesByAuthorName('Theophile Dupont'));
        $this->assertCount(1, $db->getThesesByAuthorName('Théophile Dupont'));
        $this->assertCount(0, $db->getThesesByAuthorName('Jean-Claude'));
    }

    public function testAdminListIgnoresAccent(): void
    {
        TestDatabase::seedBasicThesis('Étude de cas', 'Théophile Martin', 2025);
        $db = TestDatabase::getInstance();

        $accented = $db->getThesesList(['search' => 'Théophile'], 0, 0);
        $plain    = $db->getThesesList(['search' => 'theophile'], 0, 0);

        $this->assertCount(1, $accented);
        $this->assertEquals($accented, $plain);
        $this->assertSame(0, $db->getThesesListCount(['search' => 'zz-nope']));
    }

    public function testAdminIdentifierSearchStillMatchesAscii(): void
    {
        [$authorId, $thesisId] = TestDatabase::seedBasicThesis('X', 'Auteur', 2024);
        $db = TestDatabase::getInstance();
        // seedBasicThesis uses identifier "$year-001" → "2024-001"
        $pdo = TestDatabase::getPDO();
        $id  = $pdo->query("SELECT identifier FROM theses WHERE id = $thesisId")->fetchColumn();
        $this->assertCount(1, $db->getThesesList(['search' => $id], 0, 0));
    }
}