<?php

namespace App\Service;

use App\BaseApp\BaseService;
use App\Models\WxAppModel;
use App\Service\common\FieldEncryptService;

/**
 * 小程序应用配置管理（后台）
 *
 * 密钥列只写不读：列表与详情一律返回掩码，前端留空表示不修改。
 * 这么做的原因是老项目把 AppSecret 明文放源码里、还进了 git 历史。
 */
class WxAppConfigService extends BaseService
{
    /**
     * @var array<int, string> 密文列
     */
    private const SECRET_FIELDS = ['app_secret', 'mch_key', 'mch_private_key'];

    public function __construct()
    {
        parent::__construct();
        $this->model = WxAppModel::class;
        $this->selectField = [
            'id', 'code', 'name', 'app_id', 'mch_id', 'mch_serial_no', 'notify_url',
            'template_code', 'status', 'remark', 'created_at', 'updated_at',
        ];
        $this->queryField = ['code' => '=', 'name' => 'like', 'status' => '='];
        $this->orderBy = ['name' => 'id', 'sort' => 'asc'];
    }

    public function list(): array
    {
        $result = $this->getPageList();
        foreach ($result['items'] as &$item) {
            $item = $this->withSecretFlags($item);
        }
        unset($item);
        return $result;
    }

    public function option(): mixed
    {
        $this->optionField = ['id', 'name', 'code'];
        return $this->getOption();
    }

    public function detail($id): mixed
    {
        $info = $this->getDetail($id);
        return $this->withSecretFlags(is_array($info) ? $info : $info->toArray());
    }

    public function create($params): mixed
    {
        return $this->insert($this->encryptSecrets($params));
    }

    public function update($id, $params): mixed
    {
        return $this->save($id, $this->encryptSecrets($params));
    }

    public function delete($ids): mixed
    {
        return $this->del($ids);
    }

    public function status($id, $status): mixed
    {
        return $this->save($id, ['status' => (int) $status]);
    }

    /**
     * 按 .env 的 WX_DEFAULT_APP_CODE / WX_APP_ID 引导落库一条空密钥记录
     * 方便首次部署：先建壳子，再进后台填 AppSecret（密钥仍不进 .env）
     */
    public function initFromEnv(): array
    {
        $code = trim((string) config('nl.wx.default_app_code', ''));
        $appId = trim((string) config('nl.wx.env_app_id', ''));
        $name = trim((string) config('nl.wx.env_app_name', ''));
        if ($code === '' || $appId === '') {
            $this->utils->errorThrow('请先在 .env 配置 WX_DEFAULT_APP_CODE 与 WX_APP_ID，再点初始化');
        }
        $row = WxAppModel::where('code', $code)->where('deleted_at', 0)->first();
        if (!empty($row)) {
            $row->update([
                'app_id' => $appId,
                'name' => $name !== '' ? $name : $row->name,
                'updated_at' => time(),
            ]);
            return [
                'created' => false,
                'id' => (int) $row->id,
                'code' => $code,
                'app_id' => $appId,
                'app_secret_set' => trim((string) ($row->app_secret ?? '')) !== '',
                'message' => '已更新 AppID/名称，请编辑该行填写 AppSecret',
            ];
        }
        $id = WxAppModel::insertGetId([
            'code' => $code,
            'name' => $name !== '' ? $name : $code,
            'app_id' => $appId,
            'status' => 0,
            'created_at' => time(),
            'updated_at' => time(),
        ]);
        return [
            'created' => true,
            'id' => (int) $id,
            'code' => $code,
            'app_id' => $appId,
            'app_secret_set' => false,
            'message' => '已创建应用记录，请编辑填写 AppSecret',
        ];
    }

    /**
     * 加密要落库的密钥；留空表示不改动
     */
    private function encryptSecrets(array $params): array
    {
        $encrypt = FieldEncryptService::getInstance();
        foreach (self::SECRET_FIELDS as $field) {
            if (!array_key_exists($field, $params)) {
                continue;
            }
            $value = trim((string) $params[$field]);
            if ($value === '') {
                unset($params[$field]);
                continue;
            }
            if ($encrypt->isEncrypted($value)) {
                continue;
            }
            $params[$field] = $encrypt->encryptForStorage($value);
        }
        return $params;
    }

    /**
     * 只告诉前端「配没配」，不回显密文也不回显明文
     */
    private function withSecretFlags(array $row): array
    {
        $raw = WxAppModel::where('id', $row['id'] ?? 0)->first(self::SECRET_FIELDS);
        foreach (self::SECRET_FIELDS as $field) {
            $row[$field . '_set'] = !empty($raw[$field] ?? '');
            unset($row[$field]);
        }
        return $row;
    }
}