<?php

namespace MintyPHP\Repository\Auth;

use MintyPHP\DB;

class PasswordResetRepository implements PasswordResetRepositoryInterface
{
    private function unwrapList($rows): array
    {
        if (!is_array($rows)) {
            return [];
        }
        $list = [];
        foreach ($rows as $row) {
            $data = $row['password_resets'] ?? $row;
            if (is_array($data)) {
                $list[] = $data;
            }
        }
        return $list;
    }

    public function create(int $userId, string $codeHash, string $expiresAt): ?int
    {
        $id = DB::insert(
            'insert into password_resets (user_id, code_hash, expires_at, attempts, used_at, created) values (?,?,?,?,NULL,NOW())',
            (string) $userId,
            $codeHash,
            $expiresAt,
            0
        );
        return $id ? (int) $id : null;
    }

    public function invalidateForUser(int $userId): bool
    {
        $result = DB::update(
            'update password_resets set used_at = NOW() where user_id = ? and used_at is null',
            (string) $userId
        );
        return $result !== false;
    }

    public function findActiveByUserId(int $userId): ?array
    {
        $row = DB::selectOne(
            'select id, user_id, code_hash, expires_at, attempts, used_at from password_resets where user_id = ? and used_at is null and expires_at > UTC_TIMESTAMP() order by id desc limit 1',
            (string) $userId
        );
        if (!$row || !isset($row['password_resets'])) {
            return null;
        }
        return $row['password_resets'];
    }

    public function findById(int $id): ?array
    {
        $row = DB::selectOne(
            'select id, user_id, code_hash, expires_at, attempts, used_at from password_resets where id = ? limit 1',
            (string) $id
        );
        if (!$row || !isset($row['password_resets'])) {
            return null;
        }
        return $row['password_resets'];
    }

    public function incrementAttempts(int $id): bool
    {
        $result = DB::update(
            'update password_resets set attempts = attempts + 1 where id = ?',
            (string) $id
        );
        return $result !== false;
    }

    public function markUsed(int $id): bool
    {
        $result = DB::update(
            'update password_resets set used_at = NOW() where id = ?',
            (string) $id
        );
        return $result !== false;
    }

    public function listByUserId(int $userId, int $limit = 20): array
    {
        if ($userId <= 0) {
            return [];
        }
        if ($limit < 1) {
            $limit = 20;
        } elseif ($limit > 100) {
            $limit = 100;
        }
        $rows = DB::select(
            'select id, user_id, expires_at, attempts, used_at, created from password_resets where user_id = ? order by id desc limit ?',
            (string) $userId,
            (string) $limit
        );
        return $this->unwrapList($rows);
    }
}
