<?php

declare(strict_types=1);

namespace App\Tests\Translation\Release;

use App\Entity\Locale;
use App\Entity\Organization;
use App\Entity\Platform;
use App\Entity\Project;
use App\Entity\Translation;
use App\Entity\TranslationKey;
use App\Enum\ExportLayout;
use App\Enum\MessageFormat;
use App\Enum\PlatformKind;
use App\Enum\TextDirection;
use App\Enum\TranslationStatus;
use App\Translation\Format\Exception\UnsupportedMessageFeatureException;
use App\Translation\Format\MessageFormatRegistry;
use App\Translation\Format\Parser\I18nextParser;
use App\Translation\Format\Parser\IcuParser;
use App\Translation\Format\Serializer\I18nextSerializer;
use App\Translation\Format\Serializer\IcuSerializer;
use App\Translation\Release\BundleBuilder;
use PHPUnit\Framework\TestCase;

/**
 * Vérifie ce qui entre — et surtout ce qui n'entre PAS — dans un fichier livré.
 *
 * Ces règles sont invisibles à l'exécution : un bundle contenant un brouillon
 * n'échoue pas, il livre du texte non validé en production. D'où des tests.
 */
final class BundleBuilderTest extends TestCase
{
    private BundleBuilder $builder;
    private Project $project;
    private Locale $french;
    private Locale $spanish;
    private Locale $canadianFrench;

    protected function setUp(): void
    {
        $this->builder = new BundleBuilder(
            new MessageFormatRegistry(
                [new IcuParser(), new I18nextParser()],
                [new IcuSerializer(), new I18nextSerializer()],
            ),
            new IcuParser(),
        );

        $organization = new Organization('Test', 'test');
        $this->french = new Locale('fr-FR', 'French', 'Français', TextDirection::Ltr, ['one', 'many', 'other']);
        $this->spanish = new Locale('es-ES', 'Spanish', 'Español', TextDirection::Ltr, ['one', 'many', 'other']);
        $this->canadianFrench = new Locale('fr-CA', 'French (CA)', 'Français (CA)', TextDirection::Ltr, ['one', 'many', 'other']);
        $this->canadianFrench->setFallbackLocale($this->french);

        $this->project = new Project($organization, 'Test', 'test', $this->french);
    }

    public function testOnlyKeysOfThePlatformAreIncluded(): void
    {
        $web = $this->platform('web', MessageFormat::Icu, ExportLayout::Flat);
        $ios = $this->platform('ios', MessageFormat::Icu, ExportLayout::Flat);

        $shared = $this->key('common.save', ['fr-FR' => 'Enregistrer'], [$web, $ios]);
        $iosOnly = $this->key('ios.settings', ['fr-FR' => 'Réglages'], [$ios]);

        $bundle = $this->builder->build($web, $this->french, [$shared, $iosOnly]);

        self::assertSame(['common.save' => 'Enregistrer'], $this->decode($bundle->payload));
        self::assertSame(1, $bundle->keyCount);
    }

    /**
     * La garantie structurelle de la décision 4 : un brouillon ne PEUT PAS
     * atteindre la production.
     */
    public function testUntranslatedKeysAreAbsentRatherThanEmpty(): void
    {
        $web = $this->platform('web', MessageFormat::Icu, ExportLayout::Flat);

        $key = $this->key('common.save', ['fr-FR' => 'Enregistrer'], [$web]);
        // Ligne espagnole présente en base, mais vide et non traduite.
        new Translation($key, $this->spanish);

        $bundle = $this->builder->build($web, $this->spanish, [$key]);

        // Repli sur la source plutôt qu'une chaîne vide : une valeur vide
        // s'afficherait comme un blanc dans l'application cliente.
        self::assertSame(['common.save' => 'Enregistrer'], $this->decode($bundle->payload));
        self::assertSame(1, $bundle->fallbackCount);
    }

    public function testFallbackChainIsFollowedBeforeTheSource(): void
    {
        $web = $this->platform('web', MessageFormat::Icu, ExportLayout::Flat);

        $key = $this->key('common.save', [
            'fr-FR' => 'Enregistrer',
            'fr-CA' => 'Sauvegarder',
        ], [$web]);

        // fr-CA a sa propre valeur : aucun repli.
        $direct = $this->builder->build($web, $this->canadianFrench, [$key]);
        self::assertSame(['common.save' => 'Sauvegarder'], $this->decode($direct->payload));
        self::assertSame(0, $direct->fallbackCount);
    }

    public function testArchivedKeysAreExcluded(): void
    {
        $web = $this->platform('web', MessageFormat::Icu, ExportLayout::Flat);
        $ios = $this->platform('ios', MessageFormat::Icu, ExportLayout::Flat);

        $key = $this->key('legacy.key', ['fr-FR' => 'Ancien'], [$web, $ios]);
        $key->removePlatform($web);
        $key->removePlatform($ios); // plus aucune plateforme : archivée

        $bundle = $this->builder->build($web, $this->french, [$key]);

        self::assertSame([], $this->decode($bundle->payload));
    }

    /**
     * Le format de la plateforme décide de la forme du fichier — c'est tout
     * l'intérêt du stockage canonique.
     */
    public function testTheSameKeyRendersDifferentlyPerPlatform(): void
    {
        $web = $this->platform('web', MessageFormat::I18next, ExportLayout::Nested);
        $ios = $this->platform('ios', MessageFormat::Icu, ExportLayout::Flat);

        $key = $this->key(
            'cart.items',
            ['fr-FR' => '{count, plural, one {# article} other {# articles}}'],
            [$web, $ios],
        );

        // i18next : une clé par forme plurielle, interpolation en double accolade.
        self::assertSame(
            ['cart' => ['items_one' => '{{count}} article', 'items_other' => '{{count}} articles']],
            $this->decode($this->builder->build($web, $this->french, [$key])->payload),
        );

        // ICU : le pluriel reste dans la chaîne, structure plate.
        self::assertSame(
            ['cart.items' => '{count, plural, one {# article} other {# articles}}'],
            $this->decode($this->builder->build($ios, $this->french, [$key])->payload),
        );
    }

    /**
     * Décision 6, règle 3 : une construction non exprimable fait ÉCHOUER la
     * publication. L'alternative serait de livrer un texte faux pour la moitié
     * des utilisateurs, sans que personne ne le remarque.
     */
    public function testUnsupportedConstructAbortsTheBundle(): void
    {
        $web = $this->platform('web', MessageFormat::I18next, ExportLayout::Nested);

        $key = $this->key(
            'welcome',
            ['fr-FR' => '{genre, select, femme {Bienvenue} other {Bienvenu}}'],
            [$web],
        );

        $this->expectException(UnsupportedMessageFeatureException::class);
        $this->expectExceptionMessageMatches('/contexte i18next/');

        $this->builder->build($web, $this->french, [$key]);
    }

    /**
     * Une clé à la fois valeur et groupe produirait un JSON ambigu, dont la
     * bibliothèque cliente perdrait silencieusement une des deux entrées.
     */
    public function testNestingConflictIsRejected(): void
    {
        $web = $this->platform('web', MessageFormat::Icu, ExportLayout::Nested);

        $keys = [
            $this->key('cart', ['fr-FR' => 'Panier'], [$web]),
            $this->key('cart.total', ['fr-FR' => 'Total'], [$web]),
        ];

        $this->expectException(\RuntimeException::class);
        $this->expectExceptionMessageMatches('/Conflit de structure/');

        $this->builder->build($web, $this->french, $keys);
    }

    public function testFlatLayoutToleratesWhatNestedRefuses(): void
    {
        $web = $this->platform('web', MessageFormat::Icu, ExportLayout::Flat);

        $keys = [
            $this->key('cart', ['fr-FR' => 'Panier'], [$web]),
            $this->key('cart.total', ['fr-FR' => 'Total'], [$web]),
        ];

        self::assertSame(
            ['cart' => 'Panier', 'cart.total' => 'Total'],
            $this->decode($this->builder->build($web, $this->french, $keys)->payload),
        );
    }

    /**
     * Le contenu doit être stable d'une publication à l'autre : sinon le
     * checksum change sans raison et toutes les applications retéléchargent.
     */
    public function testOutputIsDeterministic(): void
    {
        $web = $this->platform('web', MessageFormat::Icu, ExportLayout::Flat);

        $keys = [
            $this->key('zeta', ['fr-FR' => 'Z'], [$web]),
            $this->key('alpha', ['fr-FR' => 'A'], [$web]),
        ];

        $first = $this->builder->build($web, $this->french, $keys);
        $second = $this->builder->build($web, $this->french, array_reverse($keys));

        self::assertSame($first->payload, $second->payload);
        self::assertSame($first->checksum(), $second->checksum());
    }

    // ── Utilitaires ───────────────────────────────────────────────────────

    private function platform(string $slug, MessageFormat $format, ExportLayout $layout): Platform
    {
        $platform = new Platform($this->project, $slug, $slug, PlatformKind::Web, $format);
        $platform->setExportLayout($layout);

        return $platform;
    }

    /**
     * @param array<string, string> $values        code de langue => valeur ICU
     * @param list<Platform>        $platforms
     */
    private function key(string $path, array $values, array $platforms): TranslationKey
    {
        $key = new TranslationKey($this->project, $path);

        foreach ($platforms as $platform) {
            $key->addPlatform($platform);
        }

        $locales = [
            'fr-FR' => $this->french,
            'es-ES' => $this->spanish,
            'fr-CA' => $this->canadianFrench,
        ];

        foreach ($values as $code => $value) {
            $translation = new Translation($key, $locales[$code]);
            $translation->write($value, TranslationStatus::Reviewed, $value);
        }

        return $key;
    }

    /**
     * @return array<string, mixed>
     */
    private function decode(string $payload): array
    {
        $decoded = json_decode($payload, true);
        self::assertIsArray($decoded);

        return $decoded;
    }
}