'use strict'
const JWT = require('jsonwebtoken')
const crypto = require('crypto')

const hashToken = async token => {
    const salt = process.env.APP_SESSION_SALT
    try {
        return crypto.createHmac('sha256', salt).update(token).digest('hex')
    } catch (err) {
        throw new Error(err.message)
    }
}

module.exports = options => {
    return {
        key: options.jwtKey,
        verifyOptions: {
            algorithms: ['HS256'],
        },
        //  TODO: Always check rawAccessToken, if it fails, we check the session, if
        // session is valid, then we reissue it if session is NOT valid, DELETE
        // the session (and kick user back to login)
        // TODO: set up cron job to occassionaly clean up activeSessions
        validate: async (decoded, request, h) => {
            const accessTokenFromHeaders = request.headers.authorization
            const hashedAccessTokenFromHeaders = await hashToken(
                accessTokenFromHeaders,
            )
            const accessToken =
                request.server.app.activeSessions[hashedAccessTokenFromHeaders]
                    .accessToken
            const sessionToken =
                request.server.app.activeSessions[hashedAccessTokenFromHeaders]
                    .sessionToken
            console.log('sessionToken from jwt strategy :=>', sessionToken)
            try {
                const validatedJwt = JWT.verify(
                    accessToken,
                    process.env.APP_SECRET,
                )
                return { isValid: true, credentials: validatedJwt.email }
            } catch (err) {
                console.error('ERROR :=>', err)
                return { isValid: false, error: err.message }
            }
        },
    }
}