const express = require('express');
const https = require('https');
const fs = require('fs');
const path = require('path');

const app = express();
app.use(express.json());

const PORT = parseInt(process.env.PORT || '3060');
const BASE = (process.env.BASE_PATH || '/feedback-tool').replace(/\/$/, '');
const FT_TOKEN = process.env.FT_TOKEN || fs.readFileSync('/root/feedback-tool.env','utf8').match(/FT_TOKEN=(.*)/)?.[1]?.trim();
const GITEA_HOST = '127.0.0.1';
const GITEA_PORT = 3040;

// CORS for widget
app.use((req, res, next) => {
  res.header('Access-Control-Allow-Origin', '*');
  res.header('Access-Control-Allow-Headers', 'Content-Type');
  res.header('Access-Control-Allow-Methods', 'GET, POST, OPTIONS');
  if (req.method === 'OPTIONS') return res.sendStatus(200);
  next();
});

// Serve widget.js — public, no auth
app.get(['/widget.js', BASE + '/widget.js'], (req, res) => {
  const SELF = `https://dev.bl.pixeldev.eu${BASE}`;
  res.setHeader('Content-Type', 'application/javascript');
  res.setHeader('Cache-Control', 'no-cache');
  res.send(`
(function() {
  var FEEDBACK_URL = '${SELF}/api/feedback';

  var cfg = (function() {
    var s = document.currentScript || document.querySelector('script[data-repo]');
    return {
      repo: s && s.getAttribute('data-repo'),
      label: s && s.getAttribute('data-label') || 'Feedback'
    };
  })();

  var style = document.createElement('style');
  style.textContent = \`
    #_fb-fab { position:fixed; bottom:1.5rem; right:1.5rem; width:52px; height:52px; border-radius:50%;
      background:#7c9ef5; color:#fff; font-size:22px; border:none; cursor:pointer; box-shadow:0 4px 16px rgba(0,0,0,.4);
      z-index:99998; display:flex; align-items:center; justify-content:center; transition:transform .15s; }
    #_fb-fab:hover { transform:scale(1.1); }
    #_fb-panel { position:fixed; bottom:5.5rem; right:1.5rem; width:320px; background:#1a1a1a;
      border:1px solid #333; border-radius:14px; padding:1.2rem; z-index:99999; box-shadow:0 8px 32px rgba(0,0,0,.5);
      font-family:'Segoe UI',system-ui,sans-serif; display:none; flex-direction:column; gap:.75rem; }
    #_fb-panel.open { display:flex; }
    #_fb-panel h3 { color:#fff; font-size:.95rem; margin:0; }
    #_fb-panel input, #_fb-panel textarea { background:#111; border:1px solid #333; border-radius:6px;
      padding:.5rem .7rem; color:#e0e0e0; font-size:.85rem; width:100%; font-family:inherit; outline:none; resize:vertical; }
    #_fb-panel input:focus, #_fb-panel textarea:focus { border-color:#7c9ef5; }
    #_fb-panel textarea { min-height:80px; }
    #_fb-submit { background:#7c9ef5; color:#fff; border:none; border-radius:6px; padding:.55rem 1rem;
      font-size:.85rem; font-weight:600; cursor:pointer; width:100%; transition:opacity .15s; }
    #_fb-submit:hover { opacity:.85; }
    #_fb-submit:disabled { opacity:.5; cursor:default; }
    #_fb-status { font-size:.78rem; text-align:center; min-height:1rem; }
    #_fb-close { position:absolute; top:.75rem; right:.9rem; background:none; border:none; color:#555;
      cursor:pointer; font-size:1rem; line-height:1; }
    #_fb-close:hover { color:#aaa; }
  \`;
  document.head.appendChild(style);

  var fab = document.createElement('button');
  fab.id = '_fb-fab'; fab.innerHTML = '💬'; fab.title = 'Feedback';
  document.body.appendChild(fab);

  var panel = document.createElement('div');
  panel.id = '_fb-panel'; panel.style.position = 'fixed';
  panel.innerHTML = \`
    <button id="_fb-close">✕</button>
    <h3>💬 Submit Feedback</h3>
    <input id="_fb-title" type="text" placeholder="Title (required)" />
    <textarea id="_fb-body" placeholder="Describe your feedback..."></textarea>
    <button id="_fb-submit">Send</button>
    <div id="_fb-status"></div>
  \`;
  document.body.appendChild(panel);

  fab.addEventListener('click', function() { panel.classList.toggle('open'); });
  document.getElementById('_fb-close').addEventListener('click', function() { panel.classList.remove('open'); });

  document.getElementById('_fb-submit').addEventListener('click', function() {
    var title = document.getElementById('_fb-title').value.trim();
    var body = document.getElementById('_fb-body').value.trim();
    var status = document.getElementById('_fb-status');
    var btn = document.getElementById('_fb-submit');
    if (!title) { status.style.color='#f57c7c'; status.textContent='Title is required.'; return; }
    btn.disabled = true; status.style.color='#888'; status.textContent='Submitting...';
    fetch(FEEDBACK_URL, {
      method: 'POST',
      headers: { 'Content-Type': 'application/json' },
      body: JSON.stringify({ title: title, body: body, repo: cfg.repo, source_url: window.location.href })
    }).then(function(r) { return r.json(); }).then(function(d) {
      if (d.issue_url) {
        status.style.color='#6fcf6f';
        status.textContent='✓ Thanks! Issue #' + d.issue_number + ' created.';
        document.getElementById('_fb-title').value = '';
        document.getElementById('_fb-body').value = '';
        setTimeout(function() { panel.classList.remove('open'); status.textContent=''; btn.disabled=false; }, 2500);
      } else {
        status.style.color='#f57c7c'; status.textContent='Error: ' + (d.error||'unknown'); btn.disabled=false;
      }
    }).catch(function(e) {
      status.style.color='#f57c7c'; status.textContent='Network error.'; btn.disabled=false;
    });
  });
})();
`);
});

// POST /api/feedback — create Gitea issue
app.post(['/api/feedback', BASE + '/api/feedback'], (req, res) => {
  const { title, body, repo, source_url } = req.body;
  if (!title) return res.status(400).json({ error: 'title required' });
  if (!repo) return res.status(400).json({ error: 'repo required' });

  const issueBody = [
    body || '',
    '',
    `---`,
    `*Submitted via feedback widget from: ${source_url || 'unknown'}*`
  ].join('\n');

  const postData = JSON.stringify({ title, body: issueBody });
  const options = {
    hostname: GITEA_HOST, port: GITEA_PORT,
    path: `/api/v1/repos/${repo}/issues`,
    method: 'POST',
    headers: {
      'Content-Type': 'application/json',
      'Authorization': `token ${FT_TOKEN}`,
      'Content-Length': Buffer.byteLength(postData)
    }
  };

  const request = require('http').request(options, r => {
    let data = '';
    r.on('data', c => data += c);
    r.on('end', () => {
      try {
        const issue = JSON.parse(data);
        if (issue.number) res.json({ ok: true, issue_number: issue.number, issue_url: issue.html_url });
        else res.status(500).json({ error: 'Failed to create issue', raw: data.slice(0,200) });
      } catch { res.status(500).json({ error: 'Parse error' }); }
    });
  });
  request.on('error', e => res.status(500).json({ error: e.message }));
  request.write(postData);
  request.end();
});

// Redirect base to registry
app.get([BASE, BASE + '/'], (req, res) => res.redirect('https://dev.bl.pixeldev.eu'));

app.listen(PORT, '127.0.0.1', () => console.log(`feedback-tool on :${PORT} at ${BASE}`));