import express, { NextFunction, Request, Response, Router } from 'express'
import { User } from '../shared/model'

const createRouter =
    <T>(setup: (r: Router, options?: T) => void) =>
    (options: T) => {
        const r = express.Router()
        setup(r, options)
        return r
    }

export const createStatusRouter = createRouter(r => {
    r.get('/', (req, res) => {
        res.json({ url: req.originalUrl, status: 'ok' })
    })
}) as () => Router

// export class PingRouter extends express.Router {
//     constructor() {
//         super()

//         this.post('/', (req, res) => {
//             if (req.body?.message === 'ping') {
//                 res.json('pong')
//             } else {
//                 res.status(400)
//                 res.json('Invalid request')
//             }
//         })
//     }
// }

export const INVALID_SESSION = `invalid session token`

export const authMiddleware =
    <U>(getUserForSession: (sid: string) => U) =>
    async (req: Request, res: Response, next: NextFunction) => {
        if (req.cookies.sid) {
            const user = await getUserForSession(req.cookies.sid)
            if (user) {
                // @ts-ignore
                req.user = user
            } else {
                res.cookie('sid', '', { expires: new Date() })
            }
        }

        next()
    }

interface AuthenticatedRequest extends Request {
    user: User | null
}

export const authenticatedMiddleware = (req: AuthenticatedRequest, res: Response, next: NextFunction) => {
    req.user && next()
}