<?php

declare(strict_types=1);

namespace app\adminapi\lists\qywx;

use app\adminapi\lists\BaseAdminDataLists;
use app\adminapi\logic\qywx\CustomerLogic;
use app\common\lists\ListsSearchInterface;
use app\common\model\auth\Admin;
use app\common\model\QywxExternalContact;
use think\facade\Db;

/**
 * 企业微信客户列表
 */
class CustomerLists extends BaseAdminDataLists implements ListsSearchInterface
{
    /**
     * @notes 搜索条件
     */
    public function setSearch(): array
    {
        // 表无 follow_user 列，跟进人在 follow_users(JSON)；跟进人筛选在 baseQuery() 中处理
        return [
            '%like%' => ['name'],
        ];
    }

    /**
     * @return int[] 入参 tag_ids 规范化后的非空字符串数组（实际为 string[]）
     */
    private function normalizeTagIds(): array
    {
        $raw = $this->params['tag_ids'] ?? null;
        if ($raw === null || $raw === '') {
            return [];
        }
        if (is_string($raw)) {
            $raw = explode(',', $raw);
        }
        if (!is_array($raw)) {
            return [];
        }
        $ids = [];
        foreach ($raw as $v) {
            $s = trim((string) $v);
            if ($s !== '') {
                $ids[] = $s;
            }
        }

        return array_values(array_unique($ids));
    }

    private function baseQuery()
    {
        $query = QywxExternalContact::where($this->searchWhere);
        if (!empty($this->params['follow_user'])) {
            $kw = addcslashes((string) $this->params['follow_user'], '%_\\');
            $query->whereLike('follow_users', '%' . $kw . '%');
        }

        // 标签筛选：JOIN 关系表按 tag_id 过滤；多个标签为 OR（命中任一即返回）。
        // 走 zyt_qywx_external_contact_tag.idx_tag 索引，比 LIKE follow_users 快得多
        $tagIds = $this->normalizeTagIds();
        if ($tagIds !== []) {
            $matchedExtIds = Db::name('qywx_external_contact_tag')
                ->whereIn('tag_id', $tagIds)
                ->group('external_userid')
                ->column('external_userid');
            if ($matchedExtIds === []) {
                // 没人命中：直接给一个不可能成立的条件，避免下面命中所有客户
                $query->whereRaw('1=0');
            } else {
                $query->whereIn('external_userid', $matchedExtIds);
            }
        }

        return $query;
    }

    /**
     * @notes 获取列表
     */
    public function lists(): array
    {
        // 按首次添加时间倒序：库字段 external_first_add_time；未回填(0)时回退 create_time（与列表「添加时间」展示一致）
        $lists = $this->baseQuery()
            ->orderRaw(
                '(COALESCE(NULLIF(external_first_add_time, 0), create_time) = 0) ASC, '
                . 'COALESCE(NULLIF(external_first_add_time, 0), create_time) DESC, id DESC'
            )
            ->limit($this->limitOffset, $this->limitLength)
            ->select()
            ->toArray();

        $wxUserids = [];
        foreach ($lists as $item) {
            $raw = json_decode($item['follow_users'] ?? '[]', true);
            if (!is_array($raw)) {
                continue;
            }
            foreach ($raw as $fu) {
                if (!is_array($fu)) {
                    continue;
                }
                $wx = trim((string) ($fu['userid'] ?? ''));
                if ($wx !== '') {
                    $wxUserids[$wx] = true;
                }
            }
        }
        $wxUserids = array_keys($wxUserids);
        $adminNameByWx = [];
        if ($wxUserids !== []) {
            $adminNameByWx = Admin::whereIn('work_wechat_userid', $wxUserids)->column('name', 'work_wechat_userid');
        }

        foreach ($lists as &$item) {
            $followUsers = json_decode($item['follow_users'] ?? '[]', true);
            $followUsers = is_array($followUsers) ? $followUsers : [];
            foreach ($followUsers as &$fu) {
                if (!is_array($fu)) {
                    continue;
                }
                $wx = trim((string) ($fu['userid'] ?? ''));
                if ($wx !== '' && isset($adminNameByWx[$wx]) && $adminNameByWx[$wx] !== '') {
                    $fu['admin_name'] = $adminNameByWx[$wx];
                }
            }
            unset($fu);
            $item['follow_users'] = $followUsers;
            $followAdminIds = json_decode($item['follow_admin_ids'] ?? '[]', true);
            $item['follow_admin_ids'] = is_array($followAdminIds) ? $followAdminIds : [];

            // 解析标签 JSON 数组（值由 CustomerLogic::extractFollowUserTags 写入；按 tag_id 去重）
            $tags = json_decode((string) ($item['tags'] ?? '[]'), true);
            $item['tags'] = is_array($tags) ? $tags : [];

            $fromDb = (int) ($item['external_first_add_time'] ?? 0);
            $fromJson = CustomerLogic::minFollowCreatetime($followUsers);
            $item['external_first_add_time'] = $fromDb > 0 ? $fromDb : $fromJson;
        }
        unset($item);

        return $lists;
    }

    /**
     * @notes 获取数量
     */
    public function count(): int
    {
        return $this->baseQuery()->count();
    }
}