<?php

declare(strict_types=1);

namespace app\common\library\scrm;

use think\Config;

/**
 * 云控蜘蛛 antiBot 配置构建器
 *
 * 约定：sessionKey = "{ticketType}:{host}"；profile=real 当 ticket_type 在 site 配置列表中
 */
class AntiBotConfigBuilder
{
    /**
     * 为指定工单类型与落地页 URL 构建 Node antiBot 配置；未启用类型返回 null
     *
     * @param string $landingUrlHint HTTP 预解析或历史上次落地的长链（可选）
     * @return array<string, mixed>|null
     */
    public static function build(string $ticketType, string $pageUrl, string $landingUrlHint = ''): ?array
    {
        $enabledTypes = self::getEnabledTypes();
        if (!in_array($ticketType, $enabledTypes, true)) {
            return null;
        }

        $sessionScope = self::resolveSessionScope($ticketType, $pageUrl, $landingUrlHint);
        if ($sessionScope === '') {
            return null;
        }

        $sessionKey = $ticketType . ':' . $sessionScope;
        $ttlMinutes = self::getSessionTtlMinutes();

        $businessHostHint = self::resolveBusinessHostHint($ticketType, $pageUrl, $landingUrlHint);

        return [
            'enabled'             => true,
            'profile'             => 'real',
            'turnstile'           => self::defaultTurnstile($ticketType),
            'solverFallback'      => self::defaultSolverFallback($ticketType),
            'cfClearanceRequired' => self::defaultCfClearanceRequired($ticketType),
            'sessionKey'          => $sessionKey,
            'challengeTimeoutMs'  => 60000,
            'sessionTtlMinutes'   => $ttlMinutes,
            'businessHostHint'    => $businessHostHint,
            'landingUrlHint'      => $landingUrlHint !== '' ? $landingUrlHint : '',
            'cfCloudflareSolver'  => self::defaultCfCloudflareSolver($ticketType),
            'cfChallengeMode'     => self::defaultCfChallengeMode($ticketType),
        ] + self::postCfReadyExtras($ticketType);
    }

    /**
     * 会话 scope：A2C 业务域+分享 id；火箭长链用动态 host、短链用 share.{token}
     */
    public static function resolveSessionScope(string $ticketType, string $pageUrl, string $landingUrlHint = ''): string
    {
        if ($ticketType === 'a2c') {
            return self::resolveA2cSessionScope($pageUrl, $landingUrlHint);
        }

        if ($ticketType === 'huojian') {
            return self::resolveHuojianSessionScope($pageUrl, $landingUrlHint);
        }

        $host = strtolower(trim((string) parse_url($pageUrl, PHP_URL_HOST)));

        return $host !== '' ? $host : '';
    }

    /**
     * @deprecated 兼容旧调用，等价 resolveSessionScope
     */
    public static function resolveSessionHost(string $ticketType, string $pageUrl): string
    {
        return self::resolveSessionScope($ticketType, $pageUrl, '');
    }

    /**
     * 解析 sessionKey（供 cron 分组调度使用）
     */
    public static function resolveSessionKey(string $ticketType, string $pageUrl, string $landingUrlHint = ''): string
    {
        $scope = self::resolveSessionScope($ticketType, $pageUrl, $landingUrlHint);

        return $ticketType . ':' . ($scope !== '' ? $scope : 'unknown');
    }

    /**
     * 是否对该工单类型启用 antiBot
     */
    public static function isEnabledForType(string $ticketType): bool
    {
        return in_array($ticketType, self::getEnabledTypes(), true);
    }

    /**
     * @return list<string>
     */
    public static function getEnabledTypes(): array
    {
        $raw = (string) Config::get('site.split_scrm_antibot_types');
        if ($raw === '') {
            return ['whatshub', 'chatknow'];
        }
        $parts = array_map('trim', explode(',', $raw));
        return array_values(array_filter($parts, static function (string $v): bool {
            return $v !== '';
        }));
    }

    public static function getSessionTtlMinutes(): int
    {
        $minutes = (int) Config::get('site.split_scrm_session_ttl_minutes');
        return $minutes > 0 ? $minutes : 120;
    }

    /**
     * 按工单类型附加 CF 过盾后的业务页就绪等待
     *
     * @return array<string, mixed>
     */
    private static function postCfReadyExtras(string $ticketType): array
    {
        if ($ticketType === 'whatshub') {
            return [
                'postCfReadyUrlContains' => 'work-order-sharing',
                'postCfReadySelector'    => '.el-input__inner',
                'postCfReadyTimeoutMs'   => 30000,
                'postCfSettleMs'         => 500,
                'postCfSpaWaitMs'        => 4000,
            ];
        }

        if ($ticketType === 'a2c') {
            return [
                'postCfReadyUrlContains' => '/visitors/counter/share',
                'postCfReadySelector'    => '.el-table',
                'postCfReadyApiUrl'      => '/api/talk/counter/share/record/list',
                'postCfReadyTimeoutMs'   => 60000,
                'postCfSettleMs'         => 500,
                'postCfSpaWaitMs'        => 8000,
            ];
        }

        if ($ticketType === 'huojian') {
            return [
                'postCfReadyUrlContains' => HuojianUrlHelper::BUSINESS_PATH_NEEDLE,
                'postCfReadySelector'    => '.el-message-box__input',
                'postCfReadyTimeoutMs'   => 45000,
                'postCfSettleMs'         => 500,
                'postCfSpaWaitMs'        => 8000,
            ];
        }

        return [];
    }

    private static function defaultTurnstile(string $ticketType): bool
    {
        return true;
    }

    private static function defaultSolverFallback(string $ticketType): bool
    {
        return true;
    }

    private static function defaultCfClearanceRequired(string $ticketType): bool
    {
        if ($ticketType === 'a2c') {
            return false;
        }

        return true;
    }

    /**
     * A2C 等为 CF Managed Challenge（5s 盾），非独立 Turnstile 挂件
     */
    private static function defaultCfChallengeMode(string $ticketType): string
    {
        if ($ticketType === 'a2c') {
            return 'managed';
        }

        return '';
    }

    /**
     * sitekey 缺失时是否允许 CapSolver AntiCloudflareTask（需 Node 侧 CAPTCHA_PROXY）
     */
    private static function defaultCfCloudflareSolver(string $ticketType): bool
    {
        return $ticketType === 'a2c';
    }

    /**
     * 火箭/A2C 业务域 hint：优先长链动态 host，其次 landing 预解析
     */
    private static function resolveBusinessHostHint(string $ticketType, string $pageUrl, string $landingUrlHint): string
    {
        if ($ticketType === 'a2c') {
            return self::resolveA2cSessionHost($pageUrl, $landingUrlHint);
        }

        if ($ticketType === 'huojian') {
            $host = HuojianUrlHelper::extractBusinessHost($pageUrl);
            if ($host !== '') {
                return $host;
            }
            if ($landingUrlHint !== '') {
                $hintHost = HuojianUrlHelper::extractBusinessHost($landingUrlHint);
                if ($hintHost !== '') {
                    return $hintHost;
                }
            }

            return '';
        }

        return '';
    }

    private static function resolveA2cSessionHost(string $pageUrl, string $landingUrlHint = ''): string
    {
        $candidates = [];
        if ($landingUrlHint !== '') {
            $candidates[] = (string) parse_url($landingUrlHint, PHP_URL_HOST);
        }
        $candidates[] = (string) parse_url($pageUrl, PHP_URL_HOST);

        foreach ($candidates as $host) {
            $host = strtolower(trim($host));
            if ($host !== '' && strpos($host, 'a2c.chat') !== false) {
                return $host;
            }
        }

        return 'user.a2c.chat';
    }

    /**
     * A2C 会话 scope：业务域 + 分享 id（避免多工单共用温池 Browser 互相干扰）
     */
    private static function resolveA2cSessionScope(string $pageUrl, string $landingUrlHint = ''): string
    {
        $host = self::resolveA2cSessionHost($pageUrl, $landingUrlHint);
        $shareId = self::extractA2cShareId($pageUrl);
        if ($shareId === '' && $landingUrlHint !== '') {
            $shareId = self::extractA2cShareId($landingUrlHint);
        }

        return $shareId !== '' ? $host . ':' . $shareId : $host;
    }

    /**
     * 从 A2C 分享 URL 提取 id 查询参数
     */
    private static function extractA2cShareId(string $url): string
    {
        $query = (string) parse_url($url, PHP_URL_QUERY);
        if ($query === '') {
            return '';
        }
        parse_str($query, $params);
        $id = isset($params['id']) ? trim((string) $params['id']) : '';

        return $id !== '' ? $id : '';
    }

    private static function resolveHuojianSessionScope(string $pageUrl, string $landingUrlHint = ''): string
    {
        $scope = HuojianUrlHelper::resolveSessionScope($pageUrl);
        if ($scope !== '') {
            return $scope;
        }

        if ($landingUrlHint !== '') {
            $fromLanding = HuojianUrlHelper::resolveSessionScope($landingUrlHint);
            if ($fromLanding !== '') {
                return $fromLanding;
            }
        }

        return '';
    }
}