import { fail, handleOptions, json } from "../_shared/http.ts";
import { requireUser } from "../_shared/supabase.ts";

Deno.serve(async (req) => {
  const preflight = handleOptions(req);
  if (preflight) return preflight;

  if (req.method !== "POST") return fail("Method not allowed", 405);

  const { client, user, error: userError } = await requireUser(req);
  if (!user) return fail(userError ?? "Unauthorized", 401);

  let body: { organization_id?: string };
  try {
    body = await req.json();
  } catch {
    return fail("Invalid JSON body");
  }

  const organizationId = body.organization_id;
  if (!organizationId) return fail("organization_id is required");

  const { data: membership, error: membershipError } = await client
    .from("organization_members")
    .select("organization_id")
    .eq("organization_id", organizationId)
    .eq("user_id", user.id)
    .maybeSingle();

  if (membershipError) return fail(membershipError.message, 400);
  if (!membership) return fail("forbidden", 403);

  const { data: channels, error } = await client
    .from("channels")
    .select("id, organization_id, name, description, slug, type, topic, is_private, position, created_at")
    .eq("organization_id", organizationId)
    .order("position", { ascending: true });

  if (error) return fail(error.message, 400);

  return json({ channels: channels ?? [] });
});