<?php

namespace App\Services;

use Illuminate\Support\Facades\DB;

class BlockService
{
    /**
     * 检查患者是否允许在指定渠道预约
     *
     * @param int $channelId 渠道ID (channel表的id)
     * @param string $patientIdCardNo 患者身份证号
     * @return array ['status'=>bool, 'msg'=>string]
     */
    public function checkAppointmentPermission($channelId, $patientIdCardNo)
    {
        // 1. 检查黑名单功能是否启用
        $config = DB::table('sys_config')
            ->where('config_key', 'block_list_config')
            ->where('deleted', 0)
            ->where('status', 1)
            ->first();

        // 如果功能未启用,直接返回允许
        if (!$config) {
            return ['status' => true, 'msg' => ''];
        }

        // 2. 查询患者的生效中黑名单记录
        $blockList = DB::table('blocklist')
            ->where('patient_id_card_no', $patientIdCardNo)
            ->where('status', 1)
            ->where('deleted', 0)
            ->where(function ($query) {
                $query->whereNull('end_time')
                      ->orWhere('end_time', '>', date('Y-m-d H:i:s'));
            })
            ->get();

        // 如果没有生效中的黑名单记录,允许预约
        if ($blockList->isEmpty()) {
            return ['status' => true, 'msg' => ''];
        }

        // 3. 解析黑名单配置
        $configValue = json_decode($config->config_value, true);

        if (!is_array($configValue) || empty($configValue)) {
            // 配置为空,不限制
            return ['status' => true, 'msg' => ''];
        }

        // 4. 检查每个黑名单类型的渠道限制
        $blockedTypes = [];
        foreach ($blockList as $block) {
            $blockType = $block->block_type;

            // 查找该黑名单类型的配置
            $typeConfig = null;
            foreach ($configValue as $item) {
                if (isset($item['type']) && $item['type'] == $blockType) {
                    $typeConfig = $item;
                    break;
                }
            }

            // 如果该类型有配置且包含当前渠道,则被限制
            if ($typeConfig && isset($typeConfig['disabled_channel']) && is_array($typeConfig['disabled_channel'])) {
                if (in_array((string)$channelId, $typeConfig['disabled_channel'])) {
                    $blockedTypes[] = $blockType;
                }
            }
        }

        // 如果有任何类型限制了该渠道,返回不允许
        if (!empty($blockedTypes)) {
            return ['status' => false, 'msg' => '患者被限制在该渠道预约'];
        }

        // 所有类型都没有限制该渠道,允许预约
        return ['status' => true, 'msg' => ''];
    }
}