import { normalizeLanguage } from '../lib/settings.js';
import { prepareAction } from '../lib/prepare-action.js';

export function createDialogController({ payload, open, render, close }) {
  let request = structuredClone(payload.request);
  let state = { ...payload.preparation, busy: false };
  let cancelled = false;
  const show = () => render({ ...state });
  show();
  return {
    cancel() {
      if (state.busy || cancelled) return;
      cancelled = true;
      request = null;
      close();
    },
    async submit(language) {
      if (cancelled || state.busy || state.kind === 'error') return;
      if (state.kind === 'language') {
        const normalized = normalizeLanguage(language);
        if (!normalized) {
          state.message = 'Enter a language using up to 100 characters.';
          show(); return;
        }
        request.language = normalized;
        state = { ...prepareAction(request), busy: false };
        show();
        if (state.kind !== 'ready') return;
      }
      if (!['ready', 'shortened'].includes(state.kind)) return;
      state.busy = true;
      state.message = '';
      show();
      try {
        await open(state.url, request.settings.openIn);
        cancelled = true;
        request = null;
        close();
      } catch {
        state.busy = false;
        state.message = 'Could not open ChatGPT. Please try again or cancel.';
        show();
      }
    },
  };
}