<?php
declare(strict_types=1);

class TaskLookupRepository
{
    public function listTaskCategories(bool $includeInactive = false): array
    {
        $sql = 'SELECT id, name, slug, sort_order, active
                FROM task_category';
        if (!$includeInactive) {
            $sql .= ' WHERE active = 1';
        }
        $sql .= ' ORDER BY sort_order ASC, name ASC';

        return TaskCertDb::fetchAll(
            $sql
        );
    }

    public function listMandants(): array
    {
        return TaskCertDb::fetchAll(
            'SELECT id, description FROM main_mandant ORDER BY description ASC'
        );
    }

    public function listDepartments(): array
    {
        return TaskCertDb::fetchAll(
            'SELECT id, description FROM main_department ORDER BY description ASC'
        );
    }

    public function listRoles(): array
    {
        return TaskCertDb::fetchAll(
            'SELECT id, description FROM main_role ORDER BY description ASC'
        );
    }

    public function listEinrichts(): array
    {
        return TaskCertDb::fetchAll(
            'SELECT id, description FROM organigramm_einricht ORDER BY description ASC'
        );
    }

    public function listFachbereiche(): array
    {
        return TaskCertDb::fetchAll(
            'SELECT id, description FROM organogramm_space ORDER BY description ASC'
        );
    }

    public function listActiveContacts(): array
    {
        return TaskCertDb::fetchAll(
            'SELECT id, name, email FROM main_contact WHERE active = 1 ORDER BY name ASC'
        );
    }

    public function searchContacts(string $term, int $limit = 15): array
    {
        $term = trim($term);
        if ($term === '' || mb_strlen($term) < 2) {
            return [];
        }

        $limit = max(1, min(50, $limit));
        $likeTerm = '%' . $term . '%';

        return TaskCertDb::fetchAll(
            'SELECT id, name, email
             FROM main_contact
             WHERE active = 1
               AND (name LIKE ? OR email LIKE ?)
             ORDER BY name ASC
             LIMIT ' . $limit,
            'ss',
            [$likeTerm, $likeTerm]
        );
    }

    public function getContactById(int $contactId): ?array
    {
        if ($contactId <= 0) {
            return null;
        }

        $rows = TaskCertDb::fetchAll(
            'SELECT id, name, email FROM main_contact WHERE id = ? AND active = 1',
            'i',
            [$contactId]
        );

        return $rows[0] ?? null;
    }

    public function listKnowledgePosts(int $languageId, int $limit = 500): array
    {
        $languageId = $languageId > 0 ? $languageId : 1;
        $limit = max(1, min(1000, $limit));

        return TaskCertDb::fetchAll(
            'SELECT
                p.id,
                COALESCE(NULLIF(v.title, ""), CONCAT("Beitrag #", p.id)) AS title
             FROM knowledgecenter_posts p
             LEFT JOIN knowledgecenter_post_versions v
                ON v.post_id = p.id
               AND v.language_id = ?
               AND v.version_number = (
                   SELECT MAX(v2.version_number)
                   FROM knowledgecenter_post_versions v2
                   WHERE v2.post_id = p.id
                     AND v2.language_id = ?
               )
             ORDER BY p.id DESC
             LIMIT ' . $limit,
            'ii',
            [$languageId, $languageId]
        );
    }

    public function mapKnowledgePostTitlesByIds(int $languageId, array $postIds): array
    {
        $languageId = $languageId > 0 ? $languageId : 1;
        $ids = array_values(array_unique(array_filter(array_map('intval', $postIds), static fn(int $id): bool => $id > 0)));
        if ($ids === []) {
            return [];
        }

        $placeholders = implode(',', array_fill(0, count($ids), '?'));
        $types = 'ii' . str_repeat('i', count($ids));
        $params = array_merge([$languageId, $languageId], $ids);

        $rows = TaskCertDb::fetchAll(
            'SELECT
                p.id,
                COALESCE(NULLIF(v.title, ""), CONCAT("Beitrag #", p.id)) AS title
             FROM knowledgecenter_posts p
             LEFT JOIN knowledgecenter_post_versions v
                ON v.post_id = p.id
               AND v.language_id = ?
               AND v.version_number = (
                   SELECT MAX(v2.version_number)
                   FROM knowledgecenter_post_versions v2
                   WHERE v2.post_id = p.id
                     AND v2.language_id = ?
               )
             WHERE p.id IN (' . $placeholders . ')',
            $types,
            $params
        );

        $map = [];
        foreach ($rows as $row) {
            $id = (int) ($row['id'] ?? 0);
            if ($id <= 0) {
                continue;
            }

            $map[$id] = trim((string) ($row['title'] ?? ('Beitrag #' . $id)));
        }

        foreach ($ids as $id) {
            if (!isset($map[$id])) {
                $map[$id] = 'Beitrag #' . $id;
            }
        }

        return $map;
    }
}