// Right-hand pane of the Study stage: commentary, word study, cross-references and
// people & places, all driven by the selected chunk.
import { useState } from 'react';
import CommentaryChunkTab from './CommentaryChunkTab.jsx';
import WordStudyTab from './WordStudyTab.jsx';
import CrossRefsTab from './CrossRefsTab.jsx';
import PeopleChunkTab from './PeopleChunkTab.jsx';

export const RESOURCE_TABS = [
  { id: 'commentary', label: 'Commentary' },
  { id: 'words', label: 'Word study' },
  { id: 'refs', label: 'Cross-refs' },
  { id: 'people', label: 'People & places' },
];

export default function ResourcePane({ tab, setTab, chunk, chapter, chapterIndex, project, updateChunk, notify, resources, wordStudy, crossRefs, openWordId, setOpenWordId }) {
  const counts = { words: chunk.greekWords.length, refs: (chunk.crossReferences ?? []).length };
  return (
    <div className="flex min-h-0 flex-1 flex-col">
      <div role="tablist" aria-label="Study resources" className="flex shrink-0 flex-wrap gap-1.5 border-b border-[var(--r-line)] px-3 py-2.5">
        {RESOURCE_TABS.map((t) => (
          <button key={t.id} type="button" role="tab" aria-selected={tab === t.id} onClick={() => setTab(t.id)}
            className={`rounded-full border px-3 py-1 text-xs ${tab === t.id ? 'border-[var(--r-text)] bg-[var(--r-text)] text-[var(--r-bg)]' : 'border-[var(--r-line)] text-[var(--r-sub)] hover:bg-black/5'}`}>
            {t.label}{counts[t.id] ? ` · ${counts[t.id]}` : ''}
          </button>
        ))}
      </div>
      <div role="tabpanel" className="min-h-0 flex-1 overflow-y-auto px-4 py-4">
        {tab === 'commentary' && <CommentaryChunkTab resources={resources} chunk={chunk} project={project} chapterIndex={chapterIndex} updateChunk={updateChunk} notify={notify} />}
        {tab === 'words' && <WordStudyTab wordStudy={wordStudy} chunk={chunk} openWordId={openWordId} setOpenWordId={setOpenWordId} />}
        {tab === 'refs' && <CrossRefsTab crossRefs={crossRefs} chunk={chunk} />}
        {tab === 'people' && <PeopleChunkTab book={chapter.bookAbbrev} chapter={chapter.chapter} chunk={chunk} />}
      </div>
    </div>
  );
}

export function useResourceTab() {
  const [tab, setTabState] = useState(() => {
    try {
      const saved = localStorage.getItem('studyResourceTab');
      return RESOURCE_TABS.some((t) => t.id === saved) ? saved : 'commentary';
    } catch { return 'commentary'; }
  });
  const setTab = (id) => {
    setTabState(id);
    try { localStorage.setItem('studyResourceTab', id); } catch { /* storage unavailable */ }
  };
  return [tab, setTab];
}