// The turn screen, in two phases.
//
// Choosing: the scenario and its options, with locked ones shown greyed and
// labelled with what they are waiting for — a player should be able to see the
// door they cannot open yet, because that is most of what makes the numbers
// mean anything.
//
// Outcome: what happened, what moved, and what the day cost regardless of the
// choice. The feedback widget lives here rather than in the choosing phase,
// because this is the moment a player has an opinion.

import { h } from '../dom.js';
import { statPanel, characterCard, changeList, statusBar } from '../components.js';
import { requirementText, turnHeading, upcomingUpkeep } from '../format.js';
import { presentPeople } from '../../engine/cast.js';
import { fillText } from '../../engine/text.js';

export function turnScreen(pack, state, schema, view, actions) {
  const heading = turnHeading(pack, state);

  return h('div', { class: 'screen screen--turn' },
    statusBar(pack, state),

    h('header', { class: 'hud' },
      h('div', { class: 'hud__where' },
        h('p', { class: 'hud__stage' }, pack.stages?.[state.stage]?.title ?? state.stage),
        h('h1', { class: 'hud__day' }, heading.title),
        heading.detail && h('p', { class: 'hud__detail' }, heading.detail),
      ),
      statPanel(pack, state, schema),
    ),

    diary(pack, state),

    h('div', { class: 'layout' },
      h('main', { class: 'scene' },
        view.phase === 'outcome'
          ? outcomeView(pack, state, view, actions)
          : choosingView(pack, state, view, actions),
      ),
      h('aside', { class: 'people' },
        h('h2', { class: 'people__heading' }, pack.peopleHeading ?? 'The people'),
        presentPeople(pack, state).map((person) => characterCard(pack, state, schema, person)),
      ),
    ),

    // Order here is tab order. "Wrap up my career" used to sit first, directly
    // after the last option — so a player tabbing to reach an option, going one
    // past it, and pressing Enter got the retrospective instead of a turn. That
    // happened in a real session at day 31 and read as the game ending. It goes
    // last now, behind buttons that do nothing frightening if pressed by
    // accident, and Import save is next to Export save where it belongs.
    h('footer', { class: 'controls' },
      h('button', { class: 'button button--quiet', onClick: actions.onExportSave }, 'Export save'),
      h('button', { class: 'button button--quiet', onClick: actions.onImportSave }, 'Import save'),
      h('button', { class: 'button button--quiet', onClick: actions.onExportFeedback },
        'Export feedback log'),
      h('button', { class: 'button button--quiet', onClick: actions.onPacks }, 'Change setting'),
      h('button', { class: 'button button--quiet', onClick: actions.onNewGame }, 'New game'),
      h('button', { class: 'button', onClick: actions.onRetrospective },
        'Wrap up my career'),
    ),
  );
}

/**
 * What is coming and when. A player asked what the daily drain was for; the
 * answer is that most of it is not daily, and this says so before the money
 * moves rather than after.
 */
function diary(pack, state) {
  const upcoming = upcomingUpkeep(pack, state);
  if (!upcoming.length) return null;

  const unit = pack.turnUnit ?? 'turn';
  return h('p', { class: 'diary' },
    upcoming.map((entry, index) => h('span', {
      class: `diary__entry diary__entry--${entry.incoming ? 'in' : 'out'}`,
    },
      index > 0 ? ' · ' : '',
      entry.label,
      entry.turnsAway === 0
        ? ' today'
        : entry.turnsAway === 1 ? ` tomorrow` : ` in ${entry.turnsAway} ${unit}s`,
    )),
  );
}

function choosingView(pack, state, view, actions) {
  const { event, options } = view.turn;
  const text = (t) => fillText(pack, state, t, view.turn.bindings);
  const visible = options.filter((o) => !o.hidden);
  // The first option a player can actually take gets the focus, so Enter plays
  // it and Tab walks to the others.
  const firstAvailable = visible.find((o) => o.available)?.option.id;

  return h('section', { class: 'scenario' },
    h('p', { class: 'scenario__text' }, text(event.description)),
    h('ul', { class: 'options' },
      visible.map(({ option, available, failed, odds }) => h('li', { class: 'options__item' },
        h('button', {
          class: `option${available ? '' : ' option--locked'}`,
          disabled: !available,
          dataset: option.id === firstAvailable ? { autofocus: 'true' } : {},
          onClick: available ? () => actions.onChoose(option.id) : null,
        },
          h('span', { class: 'option__label' }, text(option.label)),
          // Odds are shown in words, never as a number: "a long shot", "likely".
          available && odds && h('span', { class: 'option__odds' }, odds.words),
          !available && h('span', { class: 'option__requirement' }, requirementText(pack, failed, state)),
        ),
      )),
    ),
  );
}

function outcomeView(pack, state, view, actions) {
  const { record, option } = view;
  // The state has already moved on to the next event, so the names in this
  // outcome come from the bindings the turn was played with, not the new ones.
  const text = (t) => fillText(pack, state, t, record.bindings ?? {});
  const branch = record.check ? option[record.check.outcome] : null;
  const result = branch ? branch.result : option.result;
  const said = pack.checks?.said ?? { success: 'It came off.', failure: 'It did not come off.' };

  return h('section', { class: 'outcome' },
    h('p', { class: 'outcome__chose' }, record.optionLabel ?? text(option.label)),
    record.check && h('p', { class: `outcome__check outcome__check--${record.check.outcome}` },
      `${capitalise(record.check.odds)} — ${said[record.check.outcome]}`),
    result && h('p', { class: 'outcome__text' }, text(result)),

    h('div', { class: 'outcome__ledger' },
      h('h3', { class: 'outcome__heading' }, 'What that changed'),
      changeList(pack, record.changes, { state }),
      record.upkeep.length > 0 && h('div', { class: 'outcome__upkeep' },
        h('h3', { class: 'outcome__heading' }, 'And then the day happened'),
        changeList(pack, record.upkeep, { state }),
      ),
    ),

    feedbackWidget(view, actions),

    h('button', {
      class: 'button button--primary button--next',
      dataset: { autofocus: 'true' },
      onClick: actions.onNext,
    }, `Next ${pack.turnUnit ?? 'turn'} →`),
  );
}

// Entirely optional: ignoring it does nothing at all, which is the point.
function feedbackWidget(view, actions) {
  const { feedback } = view;
  const ratingButton = (value, label) => h('button', {
    class: `rating${feedback.rating === value ? ' rating--on' : ''}`,
    type: 'button',
    'aria-pressed': String(feedback.rating === value),
    onClick: () => actions.onRate(value),
  }, label);

  return h('section', { class: 'feedback' },
    h('div', { class: 'feedback__row' },
      h('span', { class: 'feedback__prompt' }, 'How was that?'),
      h('div', { class: 'feedback__ratings' },
        ratingButton('up', '👍'),
        ratingButton('neutral', '😐'),
        ratingButton('down', '👎'),
      ),
      h('button', {
        class: 'feedback__toggle',
        type: 'button',
        onClick: actions.onToggleFeedbackDetail,
      }, view.feedbackOpen ? 'Fewer options' : 'Say more'),
    ),

    view.feedbackOpen && h('div', { class: 'feedback__detail' },
      h('label', { class: 'field' },
        h('span', { class: 'field__label' }, 'Anything you want to tell the designer?'),
        h('textarea', {
          class: 'field__input',
          rows: 2,
          value: feedback.comment ?? '',
          onInput: (e) => actions.onComment(e.target.value),
        }),
      ),
      h('label', { class: 'field' },
        h('span', { class: 'field__label' },
          "Something you wanted to do that wasn't offered?"),
        h('textarea', {
          class: 'field__input',
          rows: 2,
          value: feedback.desiredAction ?? '',
          onInput: (e) => actions.onDesiredAction(e.target.value),
        }),
      ),
    ),

    feedback.saved && h('p', { class: 'feedback__saved' }, 'Noted — thank you.'),
  );
}

const capitalise = (words) => words.charAt(0).toUpperCase() + words.slice(1);