const router = require('koa-router')();
const jwt = require('jsonwebtoken');
const userModel = require('../models/userModel.js');

router.post('/login', async (ctx) => {
	const data = ctx.request.body;
	if(!data.name || !data.password){
		return ctx.body = {
			code: '000002',
			data: null,
			msg: '参数不合法'
		}
	}
	const result = await userModel.findOne({
		name: data.name,
		password: data.password
	})
	if(result !== null){
		const token = jwt.sign({
			name: result.name,
			_id: result._id
		}, 'my_token', { expiresIn: '2h' });
		return ctx.body = {
			code: '000001',
			data: token,
			msg: '登录成功'
		}
	}else{
		return ctx.body = {
			code: '000002',
			data: null,
			msg: '用户名或密码错误'
		}
	}
});

module.exports = router;

submit(){
	axios.post('/login', {
		name: this.username,
		password: this.password
	}).then(res => {
		if(res.code === '000001'){
			localStorage.setItem('token', res.data);
			localStorage.setItem('token_exp', new Date().getTime());
			this.$router.push('/');
		}else{
			alert(res.msg);
		}
	})
}

axios.interceptors.request.use(config => {
    const token = localStorage.getItem('token');
    config.headers.common['Authorization'] = 'Bearer ' + token;
    return config;
})

const koa = require('koa');
const koajwt = require('koa-jwt');
const app = new koa();

// 错误处理
app.use((ctx, next) => {
    return next().catch((err) => {
        if(err.status === 401){
            ctx.status = 401;
      		ctx.body = 'Protected resource, use Authorization header to get access\n';
        }else{
            throw err;
        }
    })
})

app.use(koajwt({
	secret: 'my_token'
}).unless({
	path: [/\/user\/login/]
}));

module.exports = function resolveAuthorizationHeader(ctx, opts) {
    if (!ctx.header || !ctx.header.authorization) {
        return;
    }
    const parts = ctx.header.authorization.split(' ');
    if (parts.length === 2) {
        const scheme = parts[0];
        const credentials = parts[1];
        if (/^Bearer$/i.test(scheme)) {
            return credentials;
        }
    }
    if (!opts.passthrough) {
        ctx.throw(401, 'Bad Authorization header format. Format is "Authorization: Bearer <token>"');
    }
};

const jwt = require('jsonwebtoken');

module.exports = (...args) => {
    return new Promise((resolve, reject) => {
        jwt.verify(...args, (error, decoded) => {
            error ? reject(error) : resolve(decoded);
        });
    });
};

const decodedToken = await verify(token, secret, opts);
if (isRevoked) {
	const tokenRevoked = await isRevoked(ctx, decodedToken, token);
	if (tokenRevoked) {
		throw new Error('Token revoked');
	}
}
ctx.state[key] = decodedToken;  // 这里的key = 'user'
if (tokenKey) {
	ctx.state[tokenKey] = token;
}