import { FreshContext, Handlers } from "$fresh/server.ts";
import { CasContent, LoginJWT, State } from "$root/defaults/interfaces.ts";
import { createJwt } from "@popov/jwt";
import { setCookie } from "$std/http/cookie.ts";
import { getKey } from "$root/routes/_middleware.ts";

function makeFakeUser(
  role: "employee" | "student",
  numEtud?: string,
): CasContent {
  if (role === "student" && numEtud) {
    return {
      amuCampus: "local",
      amuComposante: "local",
      amuDateValidation: "",
      coGroup: "",
      eduPersonPrimaryAffiliation: "student",
      eduPersonPrincipalName: `${numEtud}@local`,
      mail: `${numEtud}@local`,
      displayName: `Etudiant ${numEtud}`,
      givenName: "",
      memberOf: [],
      sn: "",
      supannCivilite: "",
      supannEntiteAffectation: "",
      supannEtuAnneeInscription: "",
      supannEtuEtape: "",
      uid: `e${numEtud}`,
    };
  }
  return {
    amuCampus: "local",
    amuComposante: "local",
    amuDateValidation: "",
    coGroup: "",
    eduPersonPrimaryAffiliation: "employee",
    eduPersonPrincipalName: "admin@local",
    mail: "admin@local",
    displayName: "Admin Local",
    givenName: "Admin",
    memberOf: [],
    sn: "Local",
    supannCivilite: "",
    supannEntiteAffectation: "",
    supannEtuAnneeInscription: "",
    supannEtuEtape: "",
    uid: "admin-local",
  };
}

export const handler: Handlers<null, State> = {
  async GET(request: Request, _context: FreshContext<State, null>) {
    if (Deno.env.get("LOCAL") !== "true") {
      return new Response("Not available outside LOCAL mode.", { status: 403 });
    }

    const url = new URL(request.url);
    const role = url.searchParams.get("role") === "student"
      ? "student"
      : "employee";
    const numEtud = url.searchParams.get("numEtud") ?? undefined;
    const user = makeFakeUser(role, numEtud);

    const now = Math.floor(Date.now() / 1000);
    const payload: LoginJWT = {
      iss: "PolyMPR",
      iat: now,
      exp: now + 0xe10,
      aud: "PolyMPR",
      user,
    };

    const token = await createJwt(payload, getKey(user.uid));
    const headers = new Headers();
    setCookie(headers, { name: "sessionToken", value: token });
    headers.set("Location", "/apps");

    return new Response(null, { status: 302, headers });
  },
};