'use strict';

// ── Helpers API ───────────────────────────────────────────────────────────────
async function api(method, path, body = null) {
  const isForm = body instanceof FormData;
  const res = await fetch(path, {
    method,
    credentials: 'include',
    headers: (!isForm && body) ? {'Content-Type': 'application/json'} : {},
    body: body ? (isForm ? body : JSON.stringify(body)) : undefined,
  });
  if (res.status === 401) { showPage('login'); return null; }
  if (!res.ok) {
    const err = await res.json().catch(() => ({ detail: res.statusText }));
    throw new Error(err.detail || 'Erreur serveur');
  }
  return res.json();
}

function esc(s) {
  return String(s)
    .replace(/&/g, '&amp;').replace(/</g, '&lt;')
    .replace(/>/g, '&gt;').replace(/"/g, '&quot;');
}

function fmtDate(iso) {
  try {
    return new Date(iso).toLocaleString('fr-FR', {
      day: '2-digit', month: '2-digit', year: 'numeric',
      hour: '2-digit', minute: '2-digit',
    });
  } catch { return iso; }
}

// ── Pages ─────────────────────────────────────────────────────────────────────
function showPage(name) {
  document.getElementById('page-login').classList.toggle('hidden', name !== 'login');
  document.getElementById('page-app').classList.toggle('hidden', name !== 'app');
}

// ── Auth ──────────────────────────────────────────────────────────────────────
async function checkAuth() {
  const me = await api('GET', '/api/auth/me');
  if (!me) return;
  document.getElementById('header-user').textContent = me.username;
  showPage('app');
  loadAll();
}

document.getElementById('form-login').addEventListener('submit', async e => {
  e.preventDefault();
  const errEl = document.getElementById('login-error');
  errEl.classList.add('hidden');
  try {
    const res = await fetch('/api/auth/login', {
      method: 'POST', credentials: 'include',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({
        username: document.getElementById('username').value,
        password: document.getElementById('password').value,
      }),
    });
    if (!res.ok) {
      const err = await res.json();
      errEl.textContent = err.detail || 'Identifiants incorrects';
      errEl.classList.remove('hidden');
      return;
    }
    const data = await res.json();
    document.getElementById('header-user').textContent = data.username;
    showPage('app');
    loadAll();
  } catch (err) {
    errEl.textContent = err.message;
    errEl.classList.remove('hidden');
  }
});

document.getElementById('btn-logout').addEventListener('click', async () => {
  await api('POST', '/api/auth/logout');
  showPage('login');
});

// ── Init globale ──────────────────────────────────────────────────────────────
async function loadAll() {
  await Promise.all([loadConfig(), loadHistory(), loadCacheStatus()]);
}

// ── Config ────────────────────────────────────────────────────────────────────
async function loadConfig() {
  const cfg = await api('GET', '/api/config');
  if (!cfg) return;
  document.getElementById('cfg-ollama-url').textContent    = cfg.ollama_url;
  document.getElementById('cfg-cluster-model').textContent = cfg.cluster_model;
}

// ── Upload ────────────────────────────────────────────────────────────────────
let selectedFiles = [];

const dropZone  = document.getElementById('drop-zone');
const fileInput = document.getElementById('file-input');

dropZone.addEventListener('click', () => fileInput.click());
dropZone.addEventListener('dragover', e => {
  e.preventDefault(); dropZone.classList.add('drag-over');
});
dropZone.addEventListener('dragleave', () => dropZone.classList.remove('drag-over'));
dropZone.addEventListener('drop', e => {
  e.preventDefault(); dropZone.classList.remove('drag-over');
  addFiles(Array.from(e.dataTransfer.files).filter(f => f.name.toLowerCase().endsWith('.pdf')));
});
fileInput.addEventListener('change', e => {
  addFiles(Array.from(e.target.files));
  fileInput.value = '';
});

function addFiles(newFiles) {
  const existing = new Set(selectedFiles.map(f => f.name));
  newFiles.forEach(f => { if (!existing.has(f.name)) selectedFiles.push(f); });
  renderFileList();
}

function renderFileList() {
  const listEl   = document.getElementById('file-list');
  const actionsEl = document.getElementById('upload-actions');
  if (!selectedFiles.length) {
    listEl.classList.add('hidden');
    actionsEl.classList.add('hidden');
    return;
  }
  listEl.classList.remove('hidden');
  actionsEl.classList.remove('hidden');
  listEl.innerHTML = selectedFiles.map((f, i) => `
    <div class="file-item">
      <span class="file-icon">&#128196;</span>
      <span class="file-name">${esc(f.name)}</span>
      <button class="file-remove" data-i="${i}" title="Retirer">&#10005;</button>
    </div>`).join('');
  listEl.querySelectorAll('.file-remove').forEach(btn =>
    btn.addEventListener('click', () => {
      selectedFiles.splice(+btn.dataset.i, 1);
      renderFileList();
    })
  );
}

document.getElementById('btn-clear-files').addEventListener('click', () => {
  selectedFiles = [];
  renderFileList();
});

// ── Traitement ────────────────────────────────────────────────────────────────
let currentJobId = null;

document.getElementById('btn-process').addEventListener('click', async () => {
  if (!selectedFiles.length) return;

  const btn      = document.getElementById('btn-process');
  const progSect = document.getElementById('section-progress');
  const resSect  = document.getElementById('section-results');
  const fill     = document.getElementById('progress-fill');
  const log      = document.getElementById('progress-log');

  btn.disabled = true;
  resSect.classList.add('hidden');
  progSect.classList.remove('hidden');
  log.innerHTML = '';
  fill.style.width = '3%';
  fill.classList.add('running');

  let steps = 0;

  // Upload
  const fd = new FormData();
  selectedFiles.forEach(f => fd.append('files', f));

  let jobId;
  try {
    const res = await fetch('/api/process', {
      method: 'POST', credentials: 'include', body: fd,
    });
    if (!res.ok) throw new Error((await res.json()).detail);
    jobId = (await res.json()).job_id;
    currentJobId = jobId;
  } catch (err) {
    addLog('Erreur : ' + err.message, 'error');
    fill.classList.remove('running');
    btn.disabled = false;
    return;
  }

  // SSE
  const es = new EventSource(`/api/progress/${jobId}`);
  es.onmessage = e => {
    const msg = JSON.parse(e.data);
    if (msg.type === 'ping') return;

    if (msg.type === 'progress') {
      addLog(msg.message);
      steps++;
      fill.style.width = Math.min(5 + steps * 7, 90) + '%';
    }

    if (msg.type === 'done') {
      fill.classList.remove('running');
      fill.style.width = '100%';
      addLog('Traitement termin\u00e9 avec succ\u00e8s', 'done');
      es.close();
      renderResults(jobId, msg.series);
      loadHistory();
      loadCacheStatus();
      btn.disabled = false;
    }

    if (msg.type === 'error') {
      fill.classList.remove('running');
      addLog('Erreur : ' + msg.message, 'error');
      es.close();
      btn.disabled = false;
    }
  };
  es.onerror = () => { es.close(); btn.disabled = false; };
});

function addLog(msg, cls = '') {
  const log = document.getElementById('progress-log');
  const div = document.createElement('div');
  div.className = 'log-line' + (cls ? ' ' + cls : '');
  div.textContent = msg;
  log.appendChild(div);
  log.scrollTop = log.scrollHeight;
}

// ── R\u00e9sultats ──────────────────────────────────────────────────────────────────
function renderResults(jobId, series) {
  const sect = document.getElementById('section-results');
  const grid = document.getElementById('series-grid');
  sect.classList.remove('hidden');

  grid.innerHTML = series.map(s => `
    <div class="series-card">
      <h3>${esc(s.name)}</h3>
      <span class="series-count">${s.event_count} \u00e9v\u00e9nement${s.event_count > 1 ? 's' : ''}</span>
      <a href="/api/download/${esc(jobId)}/${esc(s.filename)}"
         class="btn btn-secondary" download="${esc(s.filename)}">
        &#8659; T\u00e9l\u00e9charger ICS
      </a>
    </div>`).join('');

  // Bouton "tout t\u00e9l\u00e9charger" : t\u00e9l\u00e9charge l'un apr\u00e8s l'autre
  document.getElementById('btn-dl-all').onclick = () => {
    series.forEach((s, i) => {
      setTimeout(() => {
        const a = document.createElement('a');
        a.href = `/api/download/${jobId}/${encodeURIComponent(s.filename)}`;
        a.download = s.filename;
        a.click();
      }, i * 400);
    });
  };

  sect.scrollIntoView({ behavior: 'smooth', block: 'start' });
}

// ── Historique ────────────────────────────────────────────────────────────────
async function loadHistory() {
  const jobs = await api('GET', '/api/jobs');
  if (!jobs) return;
  const listEl = document.getElementById('history-list');
  if (!jobs.length) {
    listEl.innerHTML = '<p class="empty-msg">Aucun traitement pr\u00e9c\u00e9dent</p>';
    return;
  }
  listEl.innerHTML = jobs.slice(0, 15).map(j => `
    <div class="history-item" data-jobid="${esc(j.job_id)}">
      <div class="hist-header">
        <span class="hist-title">${j.series ? j.series.length : '?'} s\u00e9rie${j.series?.length > 1 ? 's' : ''}</span>
        <span class="hist-date">${fmtDate(j.created_at)}</span>
      </div>
      <div class="hist-files">${esc((j.pdf_names || []).join(', '))}</div>
    </div>`).join('');

  listEl.querySelectorAll('.history-item').forEach(item =>
    item.addEventListener('click', async () => {
      const job = await api('GET', `/api/jobs/${item.dataset.jobid}`);
      if (job?.series) renderResults(job.job_id, job.series);
    })
  );
}

// ── Cache ─────────────────────────────────────────────────────────────────────
async function loadCacheStatus() {
  const status = await api('GET', '/api/cache/status');
  if (!status) return;
  const set = (id, ok) => {
    const el = document.getElementById(id);
    el.textContent  = ok ? '\u2713 En cache' : '\u2715 Non mis en cache';
    el.className    = 'setting-value ' + (ok ? 'ok' : 'nok');
  };
  set('cache-website', status.website_cached);
  set('cache-series',  status.series_cached);
}

document.getElementById('btn-clear-cache').addEventListener('click', async () => {
  if (!confirm('Vider le cache ?\nLe prochain traitement re-scrapera le site et re-classifiera les s\u00e9ries avec l\'IA.')) return;
  const result = await api('DELETE', '/api/cache');
  if (!result) return;
  alert(result.deleted.length
    ? 'Cache vid\u00e9 : ' + result.deleted.join(', ')
    : 'Cache d\u00e9j\u00e0 vide');
  loadCacheStatus();
});

// ── D\u00e9marrage ──────────────────────────────────────────────────────────────────
checkAuth();