<?php

namespace app\inquiry\service;

use app\inquiry\utils\PhoneCountryHelper;
use support\Db;

class FbLeadSyncService
{
    /**
     * 同步指定渠道的 fb_leads.sync_status=0 数据到 inquiry_log
     * 并将对应 fb_leads.sync_status 更新为 1
     *
     * @param int $enterUserId  录入人ID
     * @param int $channelId    渠道ID（既用于 fb_leads.channel，也用于 inquiry_log.channel）
     * @return int 同步条数
     */
    public function syncToInquiryLog(int $enterUserId, int $channelId): int
    {
        $leads = Db::table('fb_leads')
            ->where('sync_status', 0)
            ->where('channel', $channelId)
            ->get();

        if ($leads->isEmpty()) {
            return 0;
        }

        $now = time();

        // 转数组，后面循环更快
        $leadArrList = [];
        foreach ($leads as $lead) {
            $leadArrList[] = (array)$lead;
        }

        // ① 收集本批手机号（去重）
        $phoneList = $this->collectPhonesFromLeads($leadArrList);

        // ② 批量查出 inquiry_log 已存在手机号集合（索引加持）
        $existingTelSet = $this->getExistingTelSet($phoneList);

        $insert = [];
        $idsToMarkProcessed = [];   // 插入成功 or 重复跳过，统一标记已处理
        $insertCount = 0;

        Db::transaction(function () use (
            $leadArrList, $existingTelSet, $enterUserId, $channelId, $now,
            &$insert, &$idsToMarkProcessed, &$insertCount
        ) {
            foreach ($leadArrList as $lead) {
                $leadId = (int)($lead['id'] ?? 0);

                $tel = trim((string)($lead['phone'] ?? ''));

                // 如果手机号存在于 inquiry_log，跳过同步（但要标记 fb_leads 已处理）
                if ($tel !== '' && isset($existingTelSet[$tel])) {
                    if ($leadId > 0) {
                        $idsToMarkProcessed[] = $leadId;
                    }
                    continue;
                }

                $insert[] = $this->mapLeadToInquiry($lead, $now, $enterUserId, $channelId);

                if ($leadId > 0) {
                    $idsToMarkProcessed[] = $leadId;
                }
            }

            if (!empty($insert)) {
                Db::table('inquiry_log')->insert($insert);
                $insertCount = count($insert);
            }

            if (!empty($idsToMarkProcessed)) {
                Db::table('fb_leads')
                    ->whereIn('id', $idsToMarkProcessed)
                    ->update([
                        'sync_status' => 1,
                        'updated_at'  => $now,
                    ]);
            }
        });

        return $insertCount;
    }

    /**
     * 从本批 leads 中收集手机号（tel），去重后返回
     */
    protected function collectPhonesFromLeads(array $leadArrList): array
    {
        $phones = [];
        foreach ($leadArrList as $lead) {
            $tel = trim((string)($lead['phone'] ?? ''));
            if ($tel !== '') {
                // 先用原值精确匹配（你后续要做归一化再改这里即可）
                $phones[$tel] = true;
            }
        }
        return array_keys($phones);
    }

    /**
     * 批量查出 inquiry_log 已存在手机号集合（返回 set：tel => true）
     * - 自动分块 whereIn，避免 SQL 过长
     * - 建议给 inquiry_log.tel 加索引 idx_tel
     */
    protected function getExistingTelSet(array $phoneList, int $chunkSize = 800): array
    {
        $phoneList = array_values(array_unique(array_filter(array_map('trim', $phoneList))));
        if (empty($phoneList)) {
            return [];
        }

        $existingTelSet = [];

        foreach (array_chunk($phoneList, $chunkSize) as $chunk) {
            $rows = Db::table('inquiry_log')
                ->select('tel')
                ->where('tel', '<>', '')
                ->whereIn('tel', $chunk)
                ->get();

            foreach ($rows as $r) {
                $t = trim((string)($r->tel ?? ''));
                if ($t !== '') {
                    $existingTelSet[$t] = true;
                }
            }
        }

        return $existingTelSet;
    }

    /**
     * 映射一条 fb_leads -> inquiry_log
     */
    protected function mapLeadToInquiry(array $lead, int $now, int $enterUserId, int $channelId): array
    {
        $email = (string)($lead['email'] ?? '');
        $tel   = (string)($lead['phone'] ?? '');
        $wa    = $tel;

        $countryId = PhoneCountryHelper::detectCountryId($tel ?: $wa);

        return [
            'order_no'      => $this->orderNum(),
            'enter_user_id' => $enterUserId,
            'recipient'     => 0,
            'quality'       => 2,
            'channel'       => $channelId, // 👈 inquiry_log 里同样用这个渠道ID

            'email'         => $email,
            'tel'           => $tel,
            'whatsapp'      => $wa,
            'country'       => $countryId ?: 0,
            'contacts'      => (string)($lead['full_name'] ?? ''),

            'content'       => $this->buildContentHtml($lead),

            'status'        => 0,
            'r_time'        => 0,
            't_time'        => 0,
            'sync_crm'      => 0,

            'created_at'    => $now,
            'updated_at'    => $now,
        ];
    }

    protected function orderNum(): string
    {
        return 'SN' . date('Ymd') . str_pad(mt_rand(1, 99999), 5, '0', STR_PAD_LEFT);
    }

    /**
     * 富文本内容拼装 —— 基于你之前的版本
     */
    protected function buildContentHtml(array $lead): string
    {
        $e = function ($v) {
            return htmlspecialchars((string)$v, ENT_QUOTES | ENT_SUBSTITUTE, 'UTF-8');
        };

        $lines = [];

        if (!empty($lead['car_model'])) {
            $lines[] = '<p><strong>意向车型：</strong>' . $e($lead['car_model']) . '</p>';
        }
        if (!empty($lead['car_quantity']) || !empty($lead['car_quantity_text'])) {
            $qty = $lead['car_quantity'] ?? $lead['car_quantity_text'] ?? '';
            $lines[] = '<p><strong>意向数量：</strong>' . $e($qty) . '</p>';
        }
        if (!empty($lead['favorite_color'])) {
            $lines[] = '<p><strong>意向颜色：</strong>' . $e($lead['favorite_color']) . '</p>';
        }
        if (!empty($lead['usage_type'])) {
            $lines[] = '<p><strong>用途：</strong>' . $e($lead['usage_type']) . '</p>';
        }
        if (!empty($lead['seat_preference'])) {
            $lines[] = '<p><strong>座位数偏好：</strong>' . $e($lead['seat_preference']) . '</p>';
        }
        if (!empty($lead['drive_type'])) {
            $lines[] = '<p><strong>驱动形式偏好：</strong>' . $e($lead['drive_type']) . '</p>';
        }
        if (!empty($lead['extra_data'])) {
            $extra = json_decode((string)$lead['extra_data'], true);
            if (is_array($extra) && $extra) {
                $lines[] = '<hr />';
                $lines[] = '<p><strong>补充问答信息：</strong></p>';
                foreach ($extra as $k => $v) {
                    $lines[] = '<p>' . $e($k) . '：' . $e($v) . '</p>';
                }
            }
        }


        $lines[] = '<hr />';
        $lines[] = '<p><strong>广告与表单信息：</strong></p>';
        $lines[] = '<p>平台：' . $e($lead['platform'] ?? '') . '</p>';
        $lines[] = '<p>Campaign：' . $e($lead['campaign_name'] ?? '') . ' (#' . $e($lead['campaign_id'] ?? '') . ')</p>';
        $lines[] = '<p>Adset：' . $e($lead['adset_name'] ?? '') . ' (#' . $e($lead['adset_id'] ?? '') . ')</p>';
        $lines[] = '<p>Ad：' . $e($lead['ad_name'] ?? '') . ' (#' . $e($lead['ad_id'] ?? '') . ')</p>';
        $lines[] = '<p>Form：' . $e($lead['form_name'] ?? '') . ' (#' . $e($lead['form_id'] ?? '') . ')</p>';

        $lines[] = '<hr />';
        $lines[] = '<p><strong>Meta 信息：</strong></p>';
        $lines[] = '<p>Lead ID：' . $e($lead['fb_lead_id'] ?? '') . '</p>';
        $lines[] = '<p>FB 创建时间原始值：' . $e($lead['fb_created_time'] ?? '') . '</p>';

        if (!empty($lead['inbox_url'])) {
            $url = $e($lead['inbox_url']);
            $lines[] = '<p>Inbox 链接：<a href="' . $url . '" target="_blank">' . $url . '</a></p>';
        }

        return implode("\n", $lines);
    }
}