import { AsyncLocalStorage } from 'node:async_hooks';
import koa from 'koa';
import { Core } from './core';
import { SetupHelper } from './setup';
export type State = koa.DefaultState;
/**
 * 统一 Conext 实体，用于注入识别
 */
export declare class Context {
    constructor();
}
/**
 * Context 不再支持使用 `[key: string]: any` 容易引发运行时 bug，
 * 让 TS 编译时检查属性必须存在
 */
export interface Context extends koa.ParameterizedContext<State, koa.DefaultContextExtends> {
    core: Core;
}
declare module 'koa' {
    interface Context {
        core: Core;
    }
}
/**
 * 中间件方法
 */
export interface Middleware extends koa.Middleware<State, Context> {
}
/**
 * 中间件下一步处理调用
 */
export type Next = koa.Next;
/**
 * koa 应用实例
 */
export interface Application extends koa<State, Context> {
    ctxStorage: AsyncLocalStorage<Context> | undefined;
    readonly currentContext: Context | undefined;
}
export interface CoreOption {
    /**
     * Environment
     * default: development
     */
    env?: string;
    /**
     * Signed cookie keys
     */
    keys?: string[];
    /**
     * Trust proxy headers
     */
    proxy?: boolean;
    /**
     * Subdomain offset
     */
    subdomainOffset?: number;
    /**
     * proxy ip header, default to X-Forwarded-For
     */
    proxyIpHeader?: string;
    /**
     * max ips read from proxy ip header, default to 0 (means infinity)
     */
    maxIpsCount?: number;
    /**
     * 是否启用 asyncLocalStorage
     * @default false
     */
    asyncLocalStorage?: boolean;
}
export type SetupFunction = (setup: SetupHelper) => void | Promise<void>;
export type SetupAfterFunction = () => void | Promise<void>;
export type SetupDestroyFunction = () => void | Promise<void>;
export interface SetupOption {
    /**
     * 模块名称
     * - 不指定则取模块函数名
     */
    name?: string;
    /**
     * 模块加载顺序
     * - 顺序按照从小到大排序
     * - 在安装模块时如果没有指定会自动根据代码顺序自增
     */
    order?: number;
}
export interface LoadedModule extends Required<SetupOption> {
    /**
     * 模块安装函数
     */
    setup: SetupFunction;
    /**
     * 模块初始化位置信息，用于查错
     */
    location?: string;
    /**
     * setup 助手
     */
    helper: SetupHelper;
}