<?php

namespace app\chukebao\controller;

use library\ResponseHelper;
use think\Db;

/**
 * 模块 D · 知识库（需求三 §3.2 · 需求六 §6.7）
 * 列表 = 存客宝已分配（enabledForTouchkebao=true），非全量；默认库由存客宝项目配置。
 * 配置真源在存客宝 H5 + Server；触客宝只读已分配。
 * 数据表：ck_kb_touchkebao_config（懒建，存放存客宝下发的分配结果）。
 */
class KnowledgeBaseController extends BaseController
{
    private function ensureTable()
    {
        Db::execute("CREATE TABLE IF NOT EXISTS `ck_kb_touchkebao_config` (
            `id` int(11) NOT NULL AUTO_INCREMENT,
            `companyId` int(11) NOT NULL DEFAULT 0,
            `kbId` int(11) NOT NULL DEFAULT 0,
            `kbName` varchar(128) NOT NULL DEFAULT '',
            `isDefault` tinyint(1) NOT NULL DEFAULT 0,
            `kefuId` int(11) NOT NULL DEFAULT 0,
            `currentKbId` int(11) NOT NULL DEFAULT 0,
            `enabled` tinyint(1) NOT NULL DEFAULT 1,
            `updateTime` int(11) NOT NULL DEFAULT 0,
            PRIMARY KEY (`id`),
            KEY `idx_company` (`companyId`)
        ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4");
    }

    /**
     * 仅返回已分配知识库
     * GET /v1/kefu/ai/knowledge-bases
     */
    public function knowledgeBases()
    {
        $this->ensureTable();
        $companyId = $this->getUserInfo('companyId');
        $kefuId = $this->getUserInfo('id');

        // 仅返回 enabled 的库（存客宝下发）；无分配 → 空列表，触客宝提示联系管理员
        $rows = Db::name('kb_touchkebao_config')
            ->where('companyId', $companyId)
            ->where('enabled', 1)
            ->where('kefuId', 0) // 项目级开放
            ->select();

        $list = [];
        $defaultKbId = null;
        foreach ($rows as $r) {
            $list[] = [
                'id' => (int)$r['kbId'],
                'name' => $r['kbName'],
                'isDefault' => (bool)$r['isDefault'],
            ];
            if ($r['isDefault']) {
                $defaultKbId = (int)$r['kbId'];
            }
        }

        // 客服个人当前选择（覆盖默认，须在已开放范围内）
        $currentKbId = $defaultKbId;
        $myCurrent = Db::name('kb_touchkebao_config')
            ->where('companyId', $companyId)
            ->where('kefuId', $kefuId)
            ->value('currentKbId');
        if ($myCurrent && in_array((int)$myCurrent, array_column($list, 'id'))) {
            $currentKbId = (int)$myCurrent;
        }

        return ResponseHelper::success([
            'defaultKbId' => $defaultKbId,
            'currentKbId' => $currentKbId,
            'list' => $list,
        ]);
    }

    /**
     * 客服在已分配范围内切换默认库
     * POST /v1/kefu/ai/knowledge-base/select
     */
    public function selectKnowledgeBase()
    {
        $this->ensureTable();
        $companyId = $this->getUserInfo('companyId');
        $kefuId = $this->getUserInfo('id');
        $kbId = (int)$this->request->param('kbId', 0);
        if (!$kbId) {
            return ResponseHelper::error('kbId 缺失', 400);
        }
        // 校验是否在已开放范围内
        $allowed = Db::name('kb_touchkebao_config')
            ->where('companyId', $companyId)
            ->where('enabled', 1)
            ->where('kbId', $kbId)
            ->count();
        if (!$allowed) {
            return ResponseHelper::error('该知识库未对触客宝开放', 403);
        }
        $exist = Db::name('kb_touchkebao_config')
            ->where('companyId', $companyId)
            ->where('kefuId', $kefuId)
            ->find();
        if ($exist) {
            Db::name('kb_touchkebao_config')->where('id', $exist['id'])
                ->update(['currentKbId' => $kbId, 'updateTime' => time()]);
        } else {
            Db::name('kb_touchkebao_config')->insert([
                'companyId' => $companyId,
                'kefuId' => $kefuId,
                'currentKbId' => $kbId,
                'enabled' => 0,
                'updateTime' => time(),
            ]);
        }
        return ResponseHelper::success(['currentKbId' => $kbId], '已切换');
    }
}