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";

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

export const handler: Handlers<null, AuthenticatedState> = {
  // #25 GET /modules/{idModule}
  async GET(
    _request: Request,
    context: FreshContext<AuthenticatedState>,
  ): Promise<Response> {
    const module = await db
      .select()
      .from(modules)
      .where(eq(modules.id, context.params.idModule))
      .then((rows) => rows[0] ?? null);

    if (!module) return NOT_FOUND;

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

  // #26 PUT /modules/{idModule}
  async PUT(
    request: Request,
    context: FreshContext<AuthenticatedState>,
  ): Promise<Response> {
    const body: { nom: string } = await request.json();

    const [updated] = await db
      .update(modules)
      .set({ nom: body.nom })
      .where(eq(modules.id, context.params.idModule))
      .returning();

    if (!updated) return NOT_FOUND;

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

  // #27 DELETE /modules/{idModule}
  async DELETE(
    _request: Request,
    context: FreshContext<AuthenticatedState>,
  ): Promise<Response> {
    const [deleted] = await db
      .delete(modules)
      .where(eq(modules.id, context.params.idModule))
      .returning();

    if (!deleted) return NOT_FOUND;

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