/**
 * 后台管理员数据模型
 *
 * @author CaiAoLin
 * @date 2017/6/1
 * @version
 */
import BaseModel from "../../common/base/base_model";
import ManagerSchema from "./schemas/manager";
import crypto from "crypto";

class ManagerModel extends BaseModel {

    /**
     * 构造函数
     *
     * @return {void}
     */
    constructor() {
        let parent = super();
        parent.model = ManagerSchema;
        parent.init();
    }

    /**
     * 设置场景
     *
     * @param {string} scene
     * @return {void}
     */
    setScene(scene = '') {
        switch (scene) {
            // 更改密码验证规则
            case 'changePassword':
                this.model.schema.path('password').required(true);
                break;
        }
    }

    /**
     * 获取列表
     *
     * @param {object} condition
     * @param {number} page
     * @return {Promise}
     */
    getList(condition = null, page = 1) {
        page = parseInt(page);
        page = page <= 1 ? 1 : page;
        let option = {page: page};
        return this.db.find(condition, null, option);
    }

    /**
     * 用户密码加密
     *
     * @param {string} token
     * @param {string} password
     * @return {string}
     */
    encryptPassword(token, password) {
        let encryptPassword = crypto.createHmac('sha1', token).update(password)
            .digest().toString('base64');
        return encryptPassword;
    }

    /**
     * 更改密码
     *
     * @param {string} username
     * @param {string} password
     * @param {string} newPassword
     * @throws {string}
     * @return {Promise}
     */
    async changePassword(username, password, newPassword) {

        // 查找对应用户
        let managerData = await this.findDataByCondition({username: username});
        if (managerData.length <= 0) {
            return false;
        }

        // 验证旧密码
        let encryptPassword = this.encryptPassword(managerData.token, password);
        if (encryptPassword !== managerData.password) {
            throw '用户名或密码错误';
        }

        // 加密新密码
        let encryptNewPassword = this.encryptPassword(managerData.token, newPassword);
        let result = await this.db.update({username: username}, {password: encryptNewPassword});

        return result.ok === 1;
    }

    /**
     * 创建管理员用户
     *
     * @return {Promise}
     */
    createManager() {
        let insertData = {
            username: 'test',
            password: this.encryptPassword('DjfDTys2dh2', 'test123'),
            token: 'DjfDTys2dh2',
            create_time: new Date().getTime(),
            role: 1,
            super_admin: 1
        };
        return this.db.create(insertData);
    }

}

export default ManagerModel;