// ── Character sheets ────────────────────────────────────────────────────────
//
// Actor-facing, RPG-style character sheets extracted by the user's LLM from a
// document (Read Aloud) or a script (Script Rehearser). Each claim cites a
// source (page + short quote + category hint). Shared by both sections via one overlay.

const CS_CHUNK_CHARS = 4000;
const _cs = { running: false, cancel: false, cache: {} };

function csLlmUrl()   { return $('reh-llm-url')?.value.trim() || (typeof rehDefaultLlmUrl === 'function' ? rehDefaultLlmUrl() : ''); }
function csLlmModel() { return $('reh-llm-model')?.value || ''; }
function csLang()     { return $('reh-design-lang')?.value || ''; }

// Build page-annotated text from the current reader scope ([p.N] at page changes).
function csReaderText() {
  if (typeof readerScopeIndices !== 'function' || !readerState?.sentences?.length) return '';
  let out = '', lastPage = -1;
  for (const i of readerScopeIndices()) {
    const u = readerState.sentences[i];
    const pg = u.words?.[0]?.page;
    if (readerState.mode === 'pdf' && pg != null && pg !== lastPage) { out += `\n[p.${pg + 1}] `; lastPage = pg; }
    out += u.text + ' ';
  }
  return out.trim();
}

// Build text from the rehearser script (narration + "SPEAKER: line"), page markers at page breaks.
function csRehearserText() {
  if (!window.rehState || !(rehState.lines || []).length) return '';
  let out = '', page = 1, started = false;
  for (const l of rehState.lines) {
    if (l.type === 'pagebreak') { page++; out += `\n[p.${page}] `; continue; }
    const t = (typeof stripMarkdown === 'function' ? stripMarkdown(l.text || '') : (l.text || '')).trim();
    if (!t) continue;
    if (!started) { out += '[p.1] '; started = true; }
    out += (l.type === 'dialog' && l.speaker ? l.speaker + ': ' : '') + t + '\n';
  }
  return out.trim();
}

// ── Generation (chunked + merged by character) ───────────────────────────────

const CS_SCALAR_FIELDS = ['aliases', 'archetype', 'physical', 'clothing', 'alignment', 'arc_note',
  'attribute_high', 'attribute_low', 'skills', 'capabilities',
  'backstory', 'relationships', 'motivation', 'fears', 'mannerisms', 'voice_pattern',
  'secret', 'conflict_style', 'win_condition'];

function csExistingSummary(map) {
  if (!map.size) return '';
  return [...map.values()].slice(0, 30).map(s => {
    const missing = CS_SCALAR_FIELDS.filter(f => !(s[f] || '').trim());
    return `- ${s.name}${s.aliases ? ` (${s.aliases})` : ''}${s.archetype ? ` — ${s.archetype}` : ''}`
      + (missing.length ? ` | still needs: ${missing.join(', ')}` : ' | complete');
  }).join('\n');
}

function csMerge(map, sheets) {
  for (const s of sheets) {
    const name = (s.name || '').trim(); if (!name) continue;
    const key = name.toLowerCase();
    if (!map.has(key)) {
      map.set(key, { ...s, name, inventory: [...(s.inventory || [])], sources: [...(s.sources || [])] });
      continue;
    }
    const e = map.get(key);
    CS_SCALAR_FIELDS.forEach(f => { if ((s[f] || '').length > (e[f] || '').length) e[f] = s[f]; });
    if (s.tier === 'main') e.tier = 'main';
    if (s.moral_alignment_score != null) {
      e.moral_alignment_score = e.moral_alignment_score != null
        ? Math.round((e.moral_alignment_score + s.moral_alignment_score) / 2)
        : s.moral_alignment_score;
    }
    if (s.arc_direction && s.arc_direction !== 'neutral') e.arc_direction = s.arc_direction;
    (s.inventory || []).forEach(it => { if (it && !e.inventory.includes(it) && e.inventory.length < 3) e.inventory.push(it); });
    (s.sources || []).forEach(src => {
      if (src && src.quote && e.sources.length < 5 && !e.sources.some(x => x.quote === src.quote)) e.sources.push(src);
    });
  }
}

async function csGenerate(text, cacheKey) {
  if (_cs.running) return null;
  if (!text) { toast('Nothing to analyse', 'error'); return null; }
  const chunks = (typeof splitTextIntoChunks === 'function') ? splitTextIntoChunks(text, CS_CHUNK_CHARS) : [text];
  _cs.running = true; _cs.cancel = false;
  const prog = csProgress(chunks.length);
  const llm_url = csLlmUrl(), model = csLlmModel(), language = csLang();
  const map = new Map();
  const roster = [];
  try {
    for (let i = 0; i < chunks.length; i++) {
      if (_cs.cancel) break;
      prog.update(i, `Reading characters · passage ${i + 1} / ${chunks.length}…`);
      try {
        const r = await fetch('/api/character-sheets', {
          method: 'POST', headers: { 'Content-Type': 'application/json' },
          body: JSON.stringify({ text: chunks[i], known_characters: roster.slice(-40), existing: csExistingSummary(map), language, llm_url, model }),
        });
        if (!r.ok) { const e = await r.json().catch(() => ({})); throw new Error(e.detail || r.statusText); }
        const data = await r.json();
        csMerge(map, data.sheets || []);
        (data.characters || []).forEach(n => { if (!roster.includes(n)) roster.push(n); });
      } catch (e) {
        toast('Passage ' + (i + 1) + ' failed: ' + (e.message || e), 'error');
      }
    }
  } finally { prog.done(); _cs.running = false; }
  if (_cs.cancel) { toast('Cancelled', 'error'); return null; }
  const sheets = [...map.values()];
  if (cacheKey) _cs.cache[cacheKey] = sheets;
  return sheets;
}

function csProgress(total) {
  let ov = document.getElementById('cs-progress');
  if (!ov) {
    ov = document.createElement('div');
    ov.id = 'cs-progress'; ov.className = 'audiobook-overlay';
    ov.innerHTML = `<div class="audiobook-box">
      <div class="audiobook-title"><span class="mdi mdi-account-details-outline"></span> Character sheets</div>
      <div class="audiobook-msg" id="cs-progress-msg">Analysing…</div>
      <div class="reader-synth-track"><div class="reader-synth-fill" id="cs-progress-fill"></div></div>
      <div class="audiobook-actions"><button class="btn-secondary btn-sm" id="cs-progress-cancel">Cancel</button></div>
    </div>`;
    document.body.appendChild(ov);
    ov.querySelector('#cs-progress-cancel').addEventListener('click', () => { _cs.cancel = true; });
  }
  ov.hidden = false;
  const fill = ov.querySelector('#cs-progress-fill'), msg = ov.querySelector('#cs-progress-msg');
  return {
    update(d, label) { if (fill) fill.style.width = (d / total * 100) + '%'; if (msg && label) msg.textContent = label; },
    done() { ov.hidden = true; },
  };
}

// ── Alignment bar ─────────────────────────────────────────────────────────────

function csAlignmentBar(score, arcDirection, arcNote) {
  const pct = Math.max(0, Math.min(100, score ?? 50));
  const arcMap = {
    'stable-good': { arrow: '→', label: 'Stable Good',  color: '#c8e6c9' },
    'stable-bad':  { arrow: '→', label: 'Stable Evil',  color: '#777' },
    'neutral':     { arrow: '→', label: 'Neutral',      color: '#aaa' },
    'good-to-bad': { arrow: '↘', label: 'Descends',     color: '#ff7043' },
    'bad-to-good': { arrow: '↗', label: 'Redeems',      color: '#66bb6a' },
    'complex':     { arrow: '↕', label: 'Complex arc',  color: '#ab47bc' },
  };
  const arc = arcMap[arcDirection] || arcMap['neutral'];
  const label = pct >= 70 ? 'Good' : pct <= 30 ? 'Evil' : 'Neutral/Ambiguous';
  return `<div class="cs-alignment-wrap" title="${escHtml(arcNote || '')}">
    <div class="cs-alignment-labels"><span>◼ Evil</span><span>Good ◻</span></div>
    <div class="cs-alignment-bar">
      <div class="cs-alignment-track"></div>
      <div class="cs-alignment-marker" style="left:${pct}%" title="${pct}/100 — ${label}"></div>
    </div>
    <div class="cs-arc-row">
      <span class="cs-arc-arrow" style="color:${arc.color}" title="${escHtml(arc.label)}">${arc.arrow}</span>
      <span class="cs-arc-label" style="color:${arc.color}">${escHtml(arc.label)}</span>
      ${arcNote ? `<span class="cs-arc-note">${escHtml(arcNote)}</span>` : ''}
    </div>
  </div>`;
}

// ── Deep analysis modal ───────────────────────────────────────────────────────

async function csDeepAnalysis(sheet, sourceText) {
  const llm_url = csLlmUrl(), model = csLlmModel(), language = csLang();
  const modal = document.createElement('div');
  modal.className = 'audiobook-overlay';
  modal.innerHTML = `<div class="audiobook-box cs-deep-box">
    <div class="cs-titlebar">
      <span class="audiobook-title"><span class="mdi mdi-brain"></span> Deep Analysis — ${escHtml(sheet.name)}</span>
      <span style="flex:1"></span>
      <button class="btn-secondary btn-sm" id="cs-deep-close">Close</button>
    </div>
    <div class="cs-deep-body" id="cs-deep-body">
      <div style="text-align:center;padding:40px;color:var(--subtext)">
        <span class="mdi mdi-loading mdi-spin" style="font-size:28px"></span><br>Running deep psychological analysis…
      </div>
    </div>
  </div>`;
  document.body.appendChild(modal);
  modal.querySelector('#cs-deep-close').addEventListener('click', () => modal.remove());
  modal.addEventListener('click', e => { if (e.target === modal) modal.remove(); });

  try {
    const summary = [sheet.archetype, sheet.alignment, sheet.secret, sheet.win_condition, sheet.conflict_style]
      .filter(Boolean).join('; ');
    const r = await fetch('/api/character-deep-analysis', {
      method: 'POST', headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        name: sheet.name, role: sheet.tier, goal: sheet.win_condition,
        summary, text_excerpt: (sourceText || '').slice(0, 8000), language, llm_url, model,
      }),
    });
    if (!r.ok) throw new Error((await r.json().catch(() => ({}))).detail || r.statusText);
    const data = await r.json();
    const a = data.analysis || {};
    const section = (icon, title, content) => content
      ? `<div class="cs-deep-section">
          <div class="cs-deep-section-head"><span class="mdi ${icon}"></span> ${title}</div>
          <div class="cs-deep-section-body">${escHtml(String(content))}</div>
        </div>` : '';
    modal.querySelector('#cs-deep-body').innerHTML = `
      <div class="cs-deep-header">
        <div style="display:flex;align-items:center;gap:12px;margin-bottom:16px">
          <span class="cs-name" style="font-size:20px">${escHtml(sheet.name)}</span>
          ${sheet.archetype ? `<span class="cs-archetype">${escHtml(sheet.archetype)}</span>` : ''}
        </div>
        ${csAlignmentBar(sheet.moral_alignment_score, sheet.arc_direction, sheet.arc_note)}
      </div>
      ${section('mdi-heart-broken-outline',  '1 — Core Flaw & Desire',    a.core_flaw)}
      ${section('mdi-run-fast',              '2 — Agency & Passivity',    a.agency)}
      ${section('mdi-comment-quote-outline', '3 — Dialogue & Voice',      a.dialogue_voice)}
      ${section('mdi-timeline-outline',      '4 — Narrative Arc',         a.narrative_arc)}
      ${section('mdi-infinity',              '5 — Paradox & Depth',       a.paradox)}
    `;
  } catch (err) {
    modal.querySelector('#cs-deep-body').innerHTML =
      `<div style="color:var(--error);padding:20px">Error: ${escHtml(String(err.message))}</div>`;
  }
}

// ── Card renderer ─────────────────────────────────────────────────────────────

function csField(label, value) {
  if (!value) return '';
  return `<div class="cs-row"><dt>${label}</dt><dd>${escHtml(String(value))}</dd></div>`;
}

function csCardHtml(s) {
  const inv = (s.inventory || []).filter(Boolean);
  const invHtml = inv.length
    ? `<div class="cs-row"><dt>Signature Items</dt><dd><ul>${inv.map(i => `<li>${escHtml(i)}</li>`).join('')}</ul></dd></div>`
    : '';
  const attrs = (s.attribute_high || s.attribute_low)
    ? `<div class="cs-row"><dt>Core Attributes</dt><dd>▲ ${escHtml(s.attribute_high || '—')} &nbsp;·&nbsp; ▼ ${escHtml(s.attribute_low || '—')}</dd></div>`
    : '';
  const sources = (s.sources || []).filter(x => x && (x.quote || x.page != null));
  const srcHtml = sources.length
    ? `<div class="cs-sources"><span class="mdi mdi-book-open-page-variant-outline"></span> ${
        sources.map(x =>
          `${x.line_hint ? `<span class="cs-src-hint">[${escHtml(x.line_hint)}]</span> ` : ''}` +
          `${x.page != null ? `<b>p.${escHtml(String(x.page))}</b> ` : ''}` +
          `${x.quote ? `"${escHtml(x.quote)}"` : ''}`
        ).join(' · ')
      }</div>`
    : '';

  return `<div class="cs-card cs-${s.tier === 'main' ? 'main' : 'supp'}" data-name="${escHtml(s.name)}">
    <div class="cs-head">
      <span class="cs-name">${escHtml(s.name)}</span>
      ${s.archetype ? `<span class="cs-archetype">${escHtml(s.archetype)}</span>` : ''}
      <span class="cs-tier">${s.tier === 'main' ? 'Main' : 'Supporting'}</span>
      <button class="btn-secondary btn-sm cs-deep-btn" data-name="${escHtml(s.name)}"
        title="5-area psychological deep analysis"
        style="margin-left:auto;font-size:11px;padding:2px 8px;">
        <span class="mdi mdi-brain"></span> Deep Analysis
      </button>
    </div>
    ${s.aliases ? `<div class="cs-aliases">aka ${escHtml(s.aliases)}</div>` : ''}
    ${csAlignmentBar(s.moral_alignment_score, s.arc_direction, s.arc_note)}
    <dl class="cs-fields">
      ${csField('Physical', s.physical)}
      ${csField('Clothing & Appearance', s.clothing)}
      ${csField('Alignment & Ethos', s.alignment)}
      ${attrs}
      ${csField('Trained Skills', s.skills)}
      ${csField('Capabilities', s.capabilities)}
      ${invHtml}
      ${csField('Backstory & Origin', s.backstory)}
      ${csField('Relationships', s.relationships)}
      ${csField('Motivation', s.motivation)}
      ${csField('Fears', s.fears)}
      ${csField('Mannerisms & Habits', s.mannerisms)}
      ${s.voice_pattern ? `<div class="cs-row cs-row-voice"><dt><span class="mdi mdi-account-voice"></span> Voice &amp; Speech</dt><dd>${escHtml(String(s.voice_pattern))}</dd></div>` : ''}
      ${csField('Dark Secret / Fatal Flaw', s.secret)}
      ${csField('Conflict Style', s.conflict_style)}
      ${csField('Win Condition', s.win_condition)}
    </dl>
    ${srcHtml}
  </div>`;
}

function csToMarkdown(sheets) {
  const sec = t => `\n## ${t}\n`;
  let md = '# Character Sheets\n';
  for (const tier of ['main', 'supp']) {
    const list = sheets.filter(s => (s.tier === 'main') === (tier === 'main'));
    if (!list.length) continue;
    md += sec(tier === 'main' ? 'Main characters' : 'Supporting characters');
    for (const s of list) {
      md += `\n### ${s.name}${s.archetype ? ' — ' + s.archetype : ''}\n`;
      if (s.aliases) md += `*aka ${s.aliases}*\n`;
      const mas = s.moral_alignment_score ?? 50;
      const masLabel = mas >= 70 ? 'Good' : mas <= 30 ? 'Evil' : 'Neutral';
      md += `- **Moral alignment:** ${mas}/100 (${masLabel}) — Arc: ${s.arc_direction || 'neutral'}\n`;
      if (s.arc_note) md += `  *${s.arc_note}*\n`;
      const f = (l, v) => v ? `- **${l}:** ${v}\n` : '';
      md += f('Physical', s.physical) + f('Clothing', s.clothing)
        + f('Alignment & Ethos', s.alignment)
        + f('Core Attributes', [s.attribute_high && '▲ ' + s.attribute_high, s.attribute_low && '▼ ' + s.attribute_low].filter(Boolean).join(' · '))
        + f('Trained Skills', s.skills) + f('Capabilities', s.capabilities)
        + f('Backstory & Origin', s.backstory) + f('Relationships', s.relationships)
        + f('Motivation', s.motivation) + f('Fears', s.fears)
        + f('Mannerisms & Habits', s.mannerisms) + f('Voice & Speech', s.voice_pattern)
        + f('Signature Items', (s.inventory || []).join(', '))
        + f('Dark Secret / Fatal Flaw', s.secret)
        + f('Conflict Style', s.conflict_style) + f('Win Condition', s.win_condition);
      const src = (s.sources || []).filter(x => x && x.quote)
        .map(x => `${x.line_hint ? '[' + x.line_hint + '] ' : ''}${x.page != null ? 'p.' + x.page + ' ' : ''}"${x.quote}"`).join('; ');
      if (src) md += `- *Sources:* ${src}\n`;
    }
  }
  return md.trim();
}

function csShow(sheets, title, sourceText) {
  document.getElementById('cs-overlay')?.remove();
  const ov = document.createElement('div');
  ov.id = 'cs-overlay'; ov.className = 'audiobook-overlay';
  const main = sheets.filter(s => s.tier === 'main');
  const supp = sheets.filter(s => s.tier !== 'main');
  const group = (label, list) => list.length
    ? `<div class="cs-group-label">${label}</div>` + list.map(csCardHtml).join('')
    : '';
  ov.innerHTML = `<div class="audiobook-box cs-box">
    <div class="cs-titlebar">
      <span class="audiobook-title"><span class="mdi mdi-account-details-outline"></span>
        ${escHtml(title || 'Character sheets')}
        <span class="audiobook-count">${sheets.length} character${sheets.length !== 1 ? 's' : ''}</span>
      </span>
      <span style="flex:1"></span>
      <button class="btn-secondary btn-sm" id="cs-copy"><span class="mdi mdi-content-copy"></span> Copy</button>
      <button class="btn-secondary btn-sm" id="cs-close">Close</button>
    </div>
    <div class="cs-list">${group('Main characters', main)}${group('Supporting characters', supp)}</div>
  </div>`;
  document.body.appendChild(ov);
  ov.querySelector('#cs-close').addEventListener('click', () => ov.remove());
  ov.querySelector('#cs-copy').addEventListener('click', () => {
    navigator.clipboard?.writeText(csToMarkdown(sheets))
      .then(() => toast('Copied as Markdown', 'success'), () => toast('Copy failed', 'error'));
  });
  ov.addEventListener('click', e => { if (e.target === ov) ov.remove(); });

  // Wire Deep Analysis buttons
  ov.querySelectorAll('.cs-deep-btn').forEach(btn => {
    btn.addEventListener('click', e => {
      e.stopPropagation();
      const name = btn.dataset.name;
      const sheet = sheets.find(s => s.name === name);
      if (sheet) csDeepAnalysis(sheet, sourceText);
    });
  });
}

// ── Entry points (reader + rehearser) ────────────────────────────────────────

// Persist a fresh batch of sheets into the Character Library (auto-save).
async function csSaveToLibrary(book, sheets) {
  if (typeof clUpsertMany !== 'function') return;
  try {
    const n = await clUpsertMany(book, sheets);
    if (n) toast(`${n} character${n !== 1 ? 's' : ''} saved to library`, 'success');
  } catch (e) { /* non-fatal — the overlay still works */ }
}

async function csForReader() {
  const text = csReaderText();
  const book = readerState.title || 'Untitled book';
  const key = 'reader:' + (readerState.title || '') + ':' + (typeof readerScopeIndices === 'function' ? readerScopeIndices().length : 0);
  if (_cs.cache[key]) { csShow(_cs.cache[key], readerState.title || 'Character sheets', text); return; }
  const sheets = await csGenerate(text, key);
  if (!sheets) return;
  if (!sheets.length) { toast('No characters found', 'error'); return; }
  csSaveToLibrary(book, sheets);
  csShow(sheets, readerState.title || 'Character sheets', text);
}

async function csForRehearser() {
  const title = $('reh-script-title')?.value.trim() || 'Character sheets';
  const book = $('reh-script-title')?.value.trim() || 'Untitled script';
  const text = csRehearserText();
  const key = 'reh:' + title + ':' + ((rehState.lines || []).length);
  if (_cs.cache[key]) { csShow(_cs.cache[key], title, text); return; }
  const sheets = await csGenerate(text, key);
  if (!sheets) return;
  if (!sheets.length) { toast('No characters found', 'error'); return; }
  csSaveToLibrary(book, sheets);
  csShow(sheets, title, text);
}

$('reader-charsheets-btn')?.addEventListener('click', csForReader);
$('reh-charsheets-btn')?.addEventListener('click', csForRehearser);