const VIEWS = new Set(["edit", "split", "preview"]);
const MODES = new Set(["markdown", "text"]);

export function readEditorState() {
  const params = new URLSearchParams(window.location.search);
  return {
    view: VIEWS.has(params.get("view")) ? params.get("view") : "split",
    mode: MODES.has(params.get("mode")) ? params.get("mode") : "markdown",
  };
}

export function writeEditorState(state, { replace = false } = {}) {
  const url = new URL(window.location.href);
  url.searchParams.set("view", state.view);
  url.searchParams.set("mode", state.mode);
  const method = replace ? "replaceState" : "pushState";
  window.history[method]({ ...state }, "", `${url.pathname}${url.search}${url.hash}`);
  window.dispatchEvent(new CustomEvent("rustpad:urlchange", { detail: { url: url.href } }));
  return url.href;
}

export function currentShareUrl(state) {
  const url = new URL(window.location.href);
  url.searchParams.set("view", state.view);
  url.searchParams.set("mode", state.mode);
  return url.href;
}