<?php

declare(strict_types=1);

namespace App\Tests\Config;

use App\Config\EmailTextCatalog;
use App\Config\EmailTextKey;
use Symfony\Bundle\FrameworkBundle\Test\KernelTestCase;

/**
 * The delivered wording is what every mail falls back to, and it is also the text an admin
 * starts editing from. A default that references a placeholder nobody declared would print
 * a dash forever without anyone noticing, which is what these tests are here to prevent.
 *
 * Since the wording moved to config/email_texts.yaml, building every definition here is
 * also what proves that file is complete: a missing entry or a placeholder without a
 * description fails in build() before any assertion runs.
 */
class EmailTextCatalogTest extends KernelTestCase
{
    public function testEveryKeyHasADefinition(): void
    {
        $catalog = $this->catalog();

        foreach (EmailTextKey::cases() as $key) {
            $definition = $catalog->get($key);

            $this->assertSame($key, $definition->key);
            $this->assertNotSame('', $definition->label);
            $this->assertNotSame('', $definition->defaultSubject);
            $this->assertNotSame('', $definition->defaultBody);
        }
    }

    public function testDefaultsOnlyUseDeclaredPlaceholders(): void
    {
        $catalog = $this->catalog();

        foreach (EmailTextKey::cases() as $key) {
            $definition = $catalog->get($key);
            $declared = $definition->getPlaceholderNames();

            preg_match_all(
                '/\{(\w+)\}/',
                $definition->defaultSubject.' '.$definition->defaultHeadline.' '.$definition->defaultBody,
                $matches
            );
            $used = array_unique($matches[1]);

            $this->assertSame(
                [],
                array_diff($used, $declared),
                sprintf('Default wording of "%s" uses undeclared placeholders', $key->value)
            );
        }
    }

    /**
     * A placeholder nobody prints is either a leftover or a hint that the wording lost a
     * detail it used to carry.
     */
    public function testEveryDeclaredPlaceholderIsUsedByTheDefaults(): void
    {
        $catalog = $this->catalog();

        foreach (EmailTextKey::cases() as $key) {
            $definition = $catalog->get($key);
            $text = $definition->defaultSubject.' '.$definition->defaultHeadline.' '.$definition->defaultBody;

            foreach ($definition->getPlaceholderNames() as $name) {
                $this->assertStringContainsString(
                    '{'.$name.'}',
                    $text,
                    sprintf('Placeholder "%s" of "%s" is declared but never used', $name, $key->value)
                );
            }
        }
    }

    public function testEveryPlaceholderIsDescribedForTheAdmin(): void
    {
        $catalog = $this->catalog();

        foreach (EmailTextKey::cases() as $key) {
            foreach ($catalog->get($key)->placeholders as $name => $description) {
                $this->assertNotSame('', trim($description), sprintf('Placeholder "%s" has no description', $name));
            }
        }
    }

    private function catalog(): EmailTextCatalog
    {
        self::bootKernel();

        return self::getContainer()->get(EmailTextCatalog::class);
    }
}