#!/usr/bin/env node
/**
 * Check anthonymau@gmail.com for new AI-related emails
 * Fetches full email content for summarization
 */

const Imap = require('imap');

const config = {
  user: 'anthonymau@gmail.com',
  password: 'wfux qjhw eqjo jswm',
  host: 'imap.gmail.com',
  port: 993,
  tls: true,
  tlsOptions: { rejectUnauthorized: false }
};

// AI newsletter patterns to match
const AI_PATTERNS = [
  'ai valley',
  'the rundown',
  'ai secret',
  'byte-sized',
  'bytesized',
  'myclaw',
  'openai global',
  'deep view',
  'khoj',
  'synthetic',
  'openhands',
  'artificial intelligence',
  'ai newsletter',
  'benevolent',
  'tldr',
  'benedict'
];

function isAINewsletter(from, subject) {
  const text = (from + ' ' + subject).toLowerCase();
  return AI_PATTERNS.some(pattern => text.includes(pattern.toLowerCase()));
}

const imap = new Imap(config);

imap.once('ready', () => {
  imap.openBox('INBOX', false, (err, box) => {
    if (err) {
      console.log('STATUS:error');
      console.log('ERROR:open_box:' + err.message);
      imap.end();
      process.exit(1);
    }
    
    imap.search(['ALL'], (err, results) => {
      if (err) {
        console.log('STATUS:error');
        console.log('ERROR:search:' + err.message);
        imap.end();
        process.exit(1);
      }
      
      const total = results.length;
      const recent = results.slice(-200); // Get last 200 emails (covers ~2 days for most inboxes)
      const lastUid = recent.length > 0 ? recent[recent.length - 1] : 0;
      
      console.log('STATUS:connected');
      console.log('TOTAL:' + total);
      console.log('LAST_UID:' + lastUid);
      console.log('RECENT:' + recent.join(','));
      
      if (recent.length > 0) {
        // Fetch headers with UID
        const fetch = imap.fetch(recent, { 
          bodies: 'HEADER.FIELDS (FROM SUBJECT DATE)',
          struct: false,
          uid: true
        });
        
        const aiEmails = [];
        
        fetch.on('message', (msg) => {
          let headers = '';
          let uid = null;
          
          msg.on('body', (stream, info) => {
            stream.on('data', (chunk) => {
              headers += chunk.toString('utf8');
            });
          });
          
          msg.once('attributes', (attrs) => {
            uid = attrs.uid;
          });
          
          msg.once('end', () => {
            const fromMatch = headers.match(/From: (.+)/i);
            const subjectMatch = headers.match(/Subject: (.+)/i);
            const dateMatch = headers.match(/Date: (.+)/i);
            const from = fromMatch ? fromMatch[1].trim() : '';
            const subject = subjectMatch ? subjectMatch[1].trim() : '';
            const dateStr = dateMatch ? dateMatch[1].trim() : '';
            
            // Only include emails from the last 36 hours
            let isRecent = true;
            if (dateStr) {
              try {
                const emailDate = new Date(dateStr);
                const cutoff = new Date(Date.now() - 36 * 60 * 60 * 1000);
                isRecent = emailDate > cutoff;
              } catch(e) {}
            }
            
            if (isRecent && isAINewsletter(from, subject)) {
              aiEmails.push({ uid, from, subject });
            }
          });
        });
        
        fetch.once('end', () => {
          console.log('AI_COUNT:' + aiEmails.length);
          
          if (aiEmails.length === 0) {
            imap.end();
            process.exit(0);
          }
          
          // Get UIDs for body fetch
          const aiUids = aiEmails.map(e => e.uid).filter(u => u);
          
          if (aiUids.length === 0) {
            imap.end();
            process.exit(0);
          }
          
          // Fetch full body for AI emails
          const bodyFetch = imap.fetch(aiUids, { 
            bodies: ['1'],
            struct: false,
            uid: true
          });
          
          let processed = 0;
          
          bodyFetch.on('message', (msg, seqno) => {
            let body = '';
            let uid = null;
            
            msg.on('body', (stream) => {
              stream.on('data', (chunk) => {
                body += chunk.toString('utf8');
              });
            });
            
            msg.once('attributes', (attrs) => {
              uid = attrs.uid;
            });
            
            msg.once('end', () => {
              processed++;
              
              // Find matching email metadata
              const meta = aiEmails.find(e => e.uid === uid) || aiEmails[processed - 1];
              
              // Clean content
              let content = body;
              try {
                // Decode quoted-printable soft line breaks FIRST
                content = content.replace(/=\r?\n/g, '');
                // Decode quoted-printable hex codes
                content = content.replace(/=([0-9A-F]{2})/gi, (m, p) => 
                  String.fromCharCode(parseInt(p, 16)));
                // Strip HTML
                content = content.replace(/<[^>]+>/g, ' ').replace(/\s+/g, ' ').trim();
              } catch (e) {}
              
              const truncated = content.substring(0, 3000).trim();
              
              console.log(`AI_EMAIL:${meta.from} | ${meta.subject}`);
              console.log(`AI_CONTENT:${truncated}`);
              
              if (processed === aiUids.length) {
                imap.end();
                process.exit(0);
              }
            });
          });
          
          bodyFetch.once('error', (err) => {
            console.log('ERROR:body_fetch:' + err.message);
            imap.end();
            process.exit(1);
          });
        });
        
      } else {
        console.log('AI_COUNT:0');
        imap.end();
        process.exit(0);
      }
    });
  });
});

imap.once('error', (err) => {
  console.log('STATUS:error');
  console.log('ERROR:connect:' + err.message);
  process.exit(1);
});

imap.once('end', () => {
  process.exit(0);
});

imap.connect();