import { FreshContext, Handlers } from "$fresh/server.ts";
import { db } from "$root/databases/db.ts";
import { enseignements } from "$root/databases/schema.ts";
import { AuthenticatedState } from "$root/defaults/interfaces.ts";
import { and, eq } from "npm:drizzle-orm@0.45.2";

const NOT_FOUND = new Response(
  JSON.stringify({ error: "Ressource introuvable" }),
  { status: 404, headers: { "content-type": "application/json" } },
);

const FORBIDDEN = new Response(null, { status: 403 });

export const handler: Handlers<null, AuthenticatedState> = {
  // #30 GET /enseignements/{idProf}/{idModule}/{idPromo}
  async GET(
    _request: Request,
    context: FreshContext<AuthenticatedState>,
  ): Promise<Response> {
    if (context.state.session.eduPersonPrimaryAffiliation !== "employee") {
      return FORBIDDEN;
    }

    const idProf = context.params.idProf;
    const idModule = context.params.idModule;
    const idPromo = context.params.idPromo;

    const enseignement = await db
      .select()
      .from(enseignements)
      .where(
        and(
          eq(enseignements.idProf, idProf),
          eq(enseignements.idModule, idModule),
          eq(enseignements.idPromo, idPromo),
        ),
      )
      .then((rows) => rows[0] ?? null);

    if (!enseignement) return NOT_FOUND;

    return new Response(JSON.stringify(enseignement), {
      headers: { "content-type": "application/json" },
    });
  },

  // #31 DELETE /enseignements/{idProf}/{idModule}/{idPromo}
  async DELETE(
    _request: Request,
    context: FreshContext<AuthenticatedState>,
  ): Promise<Response> {
    if (context.state.session.eduPersonPrimaryAffiliation !== "employee") {
      return FORBIDDEN;
    }

    const idProf = context.params.idProf;
    const idModule = context.params.idModule;
    const idPromo = context.params.idPromo;

    const [deleted] = await db
      .delete(enseignements)
      .where(
        and(
          eq(enseignements.idProf, idProf),
          eq(enseignements.idModule, idModule),
          eq(enseignements.idPromo, idPromo),
        ),
      )
      .returning();

    if (!deleted) return NOT_FOUND;

    return new Response(null, { status: 204 });
  },
};