import { Context, Effect, Layer } from "effect"
import jwt from "jsonwebtoken"


export class JSONWebToken extends Context.Tag("JSONWebToken")<JSONWebToken, {
    sign: (
        payload:             string | object | Buffer,
        secretOrPrivateKey:  jwt.Secret,
        options:             jwt.SignOptions,
    ) => Effect.Effect<
        string,
        Error,
        never
    >,

    verify: (
        token:              string,
        secretOrPublicKey:  jwt.Secret,
        options:            jwt.VerifyOptions,
    ) => Effect.Effect<
        string | jwt.Jwt | jwt.JwtPayload,
        jwt.VerifyErrors | Error,
        never
    >,
}>() {}


export const JSONWebTokenLive = Layer.succeed(JSONWebToken, {
    sign: (payload, secretOrPrivateKey, options) => Effect.async(resume =>
        jwt.sign(payload, secretOrPrivateKey, options, (err, token) => {
            resume(token
                ? Effect.succeed(token)
                : Effect.fail(err || new Error("Unknown error"))
            )
        })
    ),

    verify: (token, secretOrPublicKey, options) => Effect.async(resume =>
        jwt.verify(token, secretOrPublicKey, options, (err, decoded) => {
            resume(decoded
                ? Effect.succeed(decoded)
                : Effect.fail(err || new Error("Unknown error"))
            )
        })
    ),
})