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

export const handler: Handlers<null, AuthenticatedState> = {
  // #23 GET /modules
  async GET(
    _request: Request,
    context: FreshContext<AuthenticatedState>,
  ): Promise<Response> {
    if (context.state.session.eduPersonPrimaryAffiliation !== "employee") {
      return new Response(JSON.stringify([]), {
        headers: { "content-type": "application/json" },
      });
    }

    const rows = await db.select().from(modules);
    return new Response(JSON.stringify(rows), {
      headers: { "content-type": "application/json" },
    });
  },

  // #24 POST /modules
  async POST(
    request: Request,
    context: FreshContext<AuthenticatedState>,
  ): Promise<Response> {
    if (context.state.session.eduPersonPrimaryAffiliation !== "employee") {
      return new Response(null, { status: 403 });
    }

    const body: { id: string; nom: string } = await request.json();

    if (!body.id || !body.nom) {
      return new Response(null, { status: 400 });
    }

    const existing = await db
      .select()
      .from(modules)
      .where(eq(modules.id, body.id))
      .then((rows) => rows[0] ?? null);

    if (existing) {
      return new Response(
        JSON.stringify({ error: "Un module avec cet identifiant existe déjà" }),
        { status: 409, headers: { "content-type": "application/json" } },
      );
    }

    const [created] = await db
      .insert(modules)
      .values({ id: body.id, nom: body.nom })
      .returning();

    return new Response(JSON.stringify(created), {
      status: 201,
      headers: { "content-type": "application/json" },
    });
  },
};