<?php

declare(strict_types=1);

namespace Steuerkram\Models;

use Steuerkram\Database;

class Account
{
    public static function all(array $filter = []): array
    {
        $where = ['1=1'];
        $params = [];

        if (!empty($filter['search'])) {
            $where[] = '(kontonummer LIKE ? OR bezeichnung LIKE ?)';
            $params[] = '%' . $filter['search'] . '%';
            $params[] = '%' . $filter['search'] . '%';
        }
        if (!empty($filter['kontenart'])) {
            $where[] = 'kontenart = ?';
            $params[] = $filter['kontenart'];
        }
        if (isset($filter['aktiv'])) {
            $where[] = 'aktiv = ?';
            $params[] = (int)$filter['aktiv'];
        }

        $sql = 'SELECT * FROM accounts WHERE ' . implode(' AND ', $where) . ' ORDER BY kontonummer';
        return Database::fetchAll($sql, $params);
    }

    public static function find(int $id): array|false
    {
        return Database::fetchOne('SELECT * FROM accounts WHERE id = ?', [$id]);
    }

    public static function findByKontonummer(string $nr): array|false
    {
        return Database::fetchOne('SELECT * FROM accounts WHERE kontonummer = ?', [$nr]);
    }

    public static function abschreibungskonten(): array
    {
        return Database::fetchAll(
            "SELECT id, kontonummer, bezeichnung FROM accounts
             WHERE kontonummer BETWEEN '4815' AND '4899' AND aktiv = 1
             ORDER BY kontonummer ASC"
        );
    }

    public static function search(string $q, int $limit = 20): array
    {
        return Database::fetchAll(
            'SELECT id, kontonummer, bezeichnung, kontenart FROM accounts
             WHERE aktiv = 1 AND (kontonummer LIKE ? OR bezeichnung LIKE ?)
             ORDER BY kontonummer LIMIT ?',
            ['%' . $q . '%', '%' . $q . '%', $limit]
        );
    }

    public static function create(array $data): int
    {
        Database::execute(
            'INSERT INTO accounts (kontonummer, bezeichnung, kontenart, beschreibung, steuercode, ustva_kz, euer_zeile)
             VALUES (?, ?, ?, ?, ?, ?, ?)',
            [
                $data['kontonummer'],
                $data['bezeichnung'],
                $data['kontenart'],
                $data['beschreibung'] ?? null,
                $data['steuercode'] ?? null,
                $data['ustva_kz'] ?? null,
                $data['euer_zeile'] !== '' ? ($data['euer_zeile'] ?? null) : null,
            ]
        );
        return (int)Database::lastInsertId();
    }

    public static function update(int $id, array $data): void
    {
        Database::execute(
            'UPDATE accounts SET kontonummer=?, bezeichnung=?, kontenart=?, beschreibung=?, steuercode=?, ustva_kz=?, euer_zeile=?, aktiv=?
             WHERE id=?',
            [
                $data['kontonummer'],
                $data['bezeichnung'],
                $data['kontenart'],
                $data['beschreibung'] ?? null,
                $data['steuercode'] ?? null,
                $data['ustva_kz'] ?? null,
                $data['euer_zeile'] !== '' ? ($data['euer_zeile'] ?? null) : null,
                (int)($data['aktiv'] ?? 1),
                $id,
            ]
        );
    }

    public static function delete(int $id): bool
    {
        // Check if any bookings reference this account
        $used = Database::fetchOne(
            'SELECT COUNT(*) as cnt FROM bookings WHERE kategorie_konto_id = ? OR zahlungskonto_id = ?',
            [$id, $id]
        );
        if ($used && $used['cnt'] > 0) {
            return false; // cannot delete
        }
        Database::execute('DELETE FROM accounts WHERE id = ? AND is_system = 0', [$id]);
        return true;
    }

    public static function isKontonummerTaken(string $nr, ?int $excludeId = null): bool
    {
        if ($excludeId) {
            $row = Database::fetchOne('SELECT id FROM accounts WHERE kontonummer = ? AND id != ?', [$nr, $excludeId]);
        } else {
            $row = Database::fetchOne('SELECT id FROM accounts WHERE kontonummer = ?', [$nr]);
        }
        return (bool)$row;
    }
}