// Contracts tab: opportunities to seize, active effects, the active contract
// and the board of offers.

import { t } from '../services/i18n.js';
import { h } from './dom.js';
import { formatDuration, moneyFormatter, rewardText, setText } from './text.js';

const BUFF_LABEL = {
  demand_mult: 'contracts.buff.demand',
  global_mult: 'contracts.buff.production',
  material_price_mult: 'contracts.buff.material',
};

export function createContractsView(root, actions) {
  let ctx;
  let fmt;
  let els;
  let offersSignature = '';
  let buffsSignature = '';

  function rebuild(newCtx, formatter) {
    ctx = newCtx;
    fmt = formatter;
    offersSignature = '';
    buffsSignature = '';

    els = {
      eventTitle: h('h3', { class: 'card__title' }),
      eventText: h('p', { class: 'card__desc' }),
      eventTime: h('p', { class: 'card__meta' }),
      claim: h('button', { class: 'btn btn--primary', type: 'button', text: t('contracts.claim'), onclick: () => actions.claimEvent() }),
      eventBox: h('div', { class: 'callout' }),
      eventNone: h('p', { class: 'hint', text: t('contracts.eventNone') }),
      buffs: h('ul', { class: 'cards' }),
      activeBox: h('div', { class: 'callout' }),
      activeTitle: h('h3', { class: 'card__title' }),
      activeReward: h('p', { class: 'card__desc' }),
      activeProgress: h('progress', { class: 'progress', max: 1, value: 0 }),
      activeText: h('p', { class: 'card__meta' }),
      abandon: h('button', { class: 'btn', type: 'button', text: t('contracts.abandon'), onclick: () => actions.abandon() }),
      activeNone: h('p', { class: 'hint', text: t('contracts.activeNone') }),
      offers: h('ul', { class: 'cards' }),
      offersNone: h('p', { class: 'hint', text: t('contracts.offersNone') }),
    };
    els.eventBox.append(els.eventTitle, els.eventText, els.eventTime, els.claim);
    els.activeBox.append(els.activeTitle, els.activeReward, els.activeProgress, els.activeText, els.abandon);

    root.replaceChildren(
      h(
        'section',
        { class: 'panel' },
        h('h2', { class: 'panel__title', text: t('contracts.events') }),
        els.eventBox,
        els.eventNone,
        h('h3', { class: 'dialog__subtitle', text: t('contracts.effects') }),
        els.buffs,
      ),
      h(
        'section',
        { class: 'panel' },
        h('h2', { class: 'panel__title', text: t('contracts.active') }),
        els.activeBox,
        els.activeNone,
        h('h3', { class: 'dialog__subtitle', text: t('contracts.board') }),
        h('p', { class: 'hint', text: t('contracts.boardInfo', { seconds: ctx.rules.contracts.offerEverySeconds }) }),
        els.offers,
        els.offersNone,
      ),
    );
  }

  function eventText(type) {
    const cfg = ctx.rules.events.types.find((e) => e.id === type);
    return t(`event.${type}.text`, {
      value: cfg?.buff ? fmt.number(cfg.buff.value) : '',
      seconds: cfg?.buff ? cfg.buff.seconds : '',
    });
  }

  function updateEvent(state) {
    const current = state.events.current;
    els.eventBox.hidden = !current;
    els.eventNone.hidden = Boolean(current);
    if (!current) return;
    setText(els.eventTitle, t(`event.${current.type}.title`));
    setText(els.eventText, eventText(current.type));
    setText(els.eventTime, t('contracts.timeLeft', { time: formatDuration(current.remaining) }));
  }

  function updateBuffs(state) {
    const signature = state.events.buffs.map((b) => `${b.type}:${b.value}`).join();
    if (signature !== buffsSignature) {
      buffsSignature = signature;
      els.buffs.replaceChildren(
        ...state.events.buffs.map((b) =>
          h(
            'li',
            { class: 'card' },
            h('div', { class: 'card__body' }, h('h3', { class: 'card__title', text: t(BUFF_LABEL[b.type], { value: fmt.number(b.value) }) }), h('p', { class: 'card__meta' })),
          ),
        ),
      );
    }
    [...els.buffs.children].forEach((li, i) => {
      const buff = state.events.buffs[i];
      if (buff) setText(li.querySelector('.card__meta'), t('contracts.timeLeft', { time: formatDuration(buff.remaining) }));
    });
  }

  function updateActive(state) {
    const active = state.contracts.active;
    els.activeBox.hidden = !active;
    els.activeNone.hidden = Boolean(active);
    if (!active) return;
    const { offer } = active;
    setText(els.activeTitle, t(`contracts.template.${offer.template}`));
    setText(els.activeReward, rewardText(offer.reward, fmt, offer.seconds));
    els.activeProgress.max = offer.target;
    els.activeProgress.value = active.progress;
    setText(
      els.activeText,
      t('contracts.progress', {
        done: fmt.number(Math.floor(active.progress)),
        target: fmt.number(offer.target),
        time: formatDuration(active.remaining),
      }),
    );
  }

  function updateOffers(state) {
    const offers = state.contracts.offers;
    const signature = offers.map((o) => `${o.template}:${o.target}:${o.reward.type}:${o.reward.amount}`).join();
    if (signature !== offersSignature) {
      offersSignature = signature;
      els.offers.replaceChildren(
        ...offers.map((offer, index) =>
          h(
            'li',
            { class: 'card' },
            h(
              'div',
              { class: 'card__body' },
              h('h3', { class: 'card__title', text: t(`contracts.template.${offer.template}`) }),
              h('p', { class: 'card__desc', text: t('contracts.goal', { target: fmt.number(offer.target), duration: formatDuration(offer.seconds) }) }),
              h('p', { class: 'card__meta', text: rewardText(offer.reward, fmt, offer.seconds) }),
            ),
            h('button', { class: 'btn btn--buy', type: 'button', text: t('contracts.accept'), 'data-index': index, onclick: () => actions.accept(index) }),
          ),
        ),
      );
    }
    els.offersNone.hidden = offers.length > 0;
    for (const button of els.offers.querySelectorAll('button')) button.disabled = Boolean(state.contracts.active);
  }

  function update(state) {
    updateEvent(state);
    updateBuffs(state);
    updateActive(state);
    updateOffers(state);
  }

  return { rebuild, update };
}