// What the vote under an article and the basket share: one way to send votes
// to the server (managed groups), and the news of what entered into force.

import { api, ApiError } from './api';
import type { DocState } from './doc.svelte';
import { i18n, t, type Key } from './i18n/index.svelte';
import { toasts } from './toast.svelte';
import { moduleName, sectionLabel } from './labels';
import type { Entered } from './types';

/** A line of a vote: one version, for or against, or null to withdraw one's vote. */
export interface Line {
  proposalId: string;
  choice: 'for' | 'against' | null;
}

/** Cents of Ğ1, as the person reads them: « 0,1 » in French. */
export function g1Amount(cents: number): string {
  return i18n.number(cents / 100);
}

export function errorText(e: unknown): string {
  return t(`error.${e instanceof ApiError ? e.code : 'internal'}` as Key);
}

/** Tells, one by one, the texts that just entered into force. */
export function announce(doc: DocState, entered: Entered[]) {
  for (const e of entered) {
    const u = doc.unit(e.unitId);
    // A module is named for what it is (ADR 0009); an article, by its title.
    const title = u?.kind ? moduleName(u) : (u?.inForce?.title ?? u?.code ?? '');
    const said =
      e.kind === 'order'
        ? t('vote.entered.order', { section: sectionLabel(u?.section) ?? u?.section ?? '' })
        : e.kind === 'title'
          ? t('vote.entered.title', { title: u?.inForce?.title ?? '' })
          : t(e.kind === 'remove' ? 'vote.entered.remove' : e.kind === 'inertia' ? 'vote.entered.inertia' : 'vote.entered', { title });
    toasts.show(said, 'rise', 6000);
  }
}

/**
 * Every line in one write on the server: a managed group, or the simulation while the chain
 * is closed (ADR 0012). Returns how many were written, and whether they were simulated.
 */
export async function voteDirect(doc: DocState, lines: Line[]): Promise<{ count: number; simulated: boolean }> {
  const id = doc.view?.doc.id;
  if (!id) return { count: 0, simulated: false };
  const r = await api.post<{ count: number; entered: Entered[]; simulated?: boolean }>(`/docs/${id}/votes`, { lines });
  await doc.reload();
  announce(doc, r.entered);
  return { count: r.count, simulated: !!r.simulated };
}