const yapi = require('./yapi.js');
const plugin_path = yapi.path.join(yapi.WEBROOT, 'node_modules');
const plugin_system_path = yapi.path.join(yapi.WEBROOT, 'exts');
const initPlugins = require('../common/lib.js').initPlugins;
var extConfig = require('../common/config.js').exts;

/**
 * 钩子配置
 */
var hooks = {
    /**
     * 第三方sso登录钩子，暂只支持设置一个
     * @param ctx 
     * @return 必需返回一个 promise 对象，resolve({username: '', email: ''})
     */
    'third_login': {
        type: 'single',
        listener: null
    },
    /**
     * 客户端增加接口成功后触发
     * @param id 接口id
     */
    'interface_add': {
        type: 'multi',
        listener: []
    },
    /**
     * 客户端删除接口成功后触发
     * @param id 接口id
     */
    'interface_del': {
        type: 'multi',
        listener: []
    },
    /**
    * 客户端更新接口成功后触发
    * @param id 接口id
    */
    'interface_update':{
        type: 'multi',
        listener: []
    },
    /**
     * 客户端获取接口数据列表
     * @param id project_id
     */
    'interface_list':{
        type: 'multi',
        listener: []
    },
    /**
     * 客户端获取一条接口信息触发
     * @param id 接口id
     */
    'interface_get':{
        type: 'multi',
        listener: []
    },
    /**
     * 客户端增加一个新项目
     * @param id 项目id
     */
    'project_add':{
        type: 'multi',
        listener: []
    },
    /**
     * 客户端删除删除一个项目
     * @param id 项目id
     */
    'project_del':{
        type: 'multi',
        listener: []
    },
    /**
     * MockServer生成mock数据后触发
     * @param context Object
     * {
     *  projectData: project,
        interfaceData: interfaceData,
        ctx: ctx,
        mockJson: res 
     * }
     * 
     */
    mock_after: {
        type: 'multi',
        listener: []
    },
    /**
     * 增加路由的钩子
     * type Sync
     * @param addPluginRouter Function 
     * addPLuginPLugin(config)
     * config = {
     *  path,      // String
     *  method,    // String
     *  controller // Class 继承baseController的class
     *  action     // String controller的Action
     * }
     */
    add_router: {
        type: 'multi',
        listener: []
    }
};

function bindHook(name, listener) {
    if (!name) throw new Error('缺少hookname');
    if (name in hooks === false) {
        throw new Error('不存在的hookname');
    }
    if (hooks[name].type === 'multi') {
        hooks[name].listener.push(listener);
    } else {
        if (typeof hooks[name].listener === 'function') {
            throw new Error('重复绑定singleHook(' + name + '), 请检查');
        }
        hooks[name].listener = listener;
    }

}

/**
 * 
 * @param {*} hookname
 * @return promise 
 */
function emitHook(name) {
    if (hooks[name] && typeof hooks[name] === 'object') {
        let args = Array.prototype.slice.call(arguments, 1);
        if (hooks[name].type === 'single' && typeof hooks[name].listener === 'function') {
            return  Promise.resolve(hooks[name].listener.apply(yapi, args));
        }
        let promiseAll = [];
        if (Array.isArray(hooks[name].listener)) {
            let listenerList = hooks[name].listener;
            for(let i=0, l = listenerList.length; i< l; i++){
                promiseAll.push(Promise.resolve(listenerList[i].apply(yapi, args)));
            }
        }
        return Promise.all(promiseAll);
    }
}

function emitHookSync(name) {
    if (hooks[name] && typeof hooks[name] === 'object') {
        let args = Array.prototype.slice.call(arguments, 1);
        if (hooks[name].type === 'single' && typeof hooks[name].listener === 'function') {
            return hooks[name].listener.apply(yapi, args);
        }
        if (Array.isArray(hooks[name].listener)) {
            hooks[name].listener.forEach((listener) => {
                listener.apply(yapi, args)
            })
        }
    }
}


yapi.bindHook = bindHook;
yapi.emitHook = emitHook;
yapi.emitHookSync = emitHook;



let pluginsConfig = initPlugins(yapi.WEBCONFIG.plugins, 'plugin');
pluginsConfig.forEach(plugin => {
    if (!plugin || plugin.enable === false || plugin.server === false) return null;

    if (!yapi.commons.fileExist(yapi.path.join(plugin_path, 'yapi-plugin-' + plugin.name + '/server.js'))) {
        throw new Error(`config.json配置了插件${plugin},但plugins目录没有找到此插件，请安装此插件`);
    }
    let pluginModule = require(yapi.path.join(plugin_path, 'yapi-plugin-' + plugin.name + '/server.js'));
    pluginModule.call(yapi, plugin.options)
})

extConfig = initPlugins(extConfig, 'ext');

extConfig.forEach(plugin => {
    if (!plugin || plugin.enable === false || plugin.server === false) return null;

    if (!yapi.commons.fileExist(yapi.path.join(plugin_system_path, 'yapi-plugin-' + plugin.name + '/server.js'))) {
        throw new Error(`config.json配置了插件${plugin},但plugins目录没有找到此插件，请安装此插件`);
    }
    let pluginModule = require(yapi.path.join(plugin_system_path, 'yapi-plugin-' + plugin.name + '/server.js'));
    pluginModule.call(yapi, plugin.options)
    yapi.commons.log('init plugins success...')
})

//delete bindHook方法，避免误操作
delete yapi.bindHook