/**
 * Gmail Filter Cleanup Script
 * Run from https://script.google.com
 *
 * SETUP REQUIRED:
 * Before running, enable the Gmail Advanced Service:
 *   1. Click "+" next to "Services" in the left sidebar
 *   2. Find "Gmail API" and add it
 *
 * Run dryRun() first to see what will be deleted.
 * Run deleteFilters() to actually delete them.
 */

// Patterns to match against filter "from" criteria.
// Any filter whose "from" contains one of these strings will be deleted.
var DELETE_FROM_PATTERNS = [
  // Dead services
  'mozy.com',
  'ingdirect.com',
  'stumbleupon.com',
  'plaxo.com',
  'jott.com',
  'svpply.com',
  'alice@email.aliceupdates.com',
  'telltalegames.com',
  'gymboree.com',
  'landofnod.com',
  'evganews@evga.com',
  'thinkgeek.com',
  'recyclebank.com',
  'sharebuilder.com',
  'zulily.com',

  // Political / campaign (no longer relevant)
  'barackobama.com',
  'berniesanders.com',
  'democrats.org',
  'rockthevote.com',
  'rockthevote',

  // No longer relevant (uncertain ones user confirmed)
  'vacationsurvey@vargaresearch.com',
  '5h4rpd0g@gmail.com',
  'mdegan@jacsmechanical.com',
  'ispcm-conf.org',
  'tntechnology.org',
  'Jason Mechler',

  // Duplicates / inbox-zero handles these via AI
  'nytimes@email.newyorktimes.com',
  'nytimes@e.newyorktimesinfo.com',
  'redcross-email@usa.redcross.org',
  'redcross-email@redcross.org',
  'redcross@theamericanredcross.org',
  'xfinity@info.xfinity.com',
  'xfinity@emails.xfinity.com',
  'kirkusreviews.com',
  'smarttoys@aol.com',
  'spotify@email.news.spotifymail.com',
  'no-reply@news.spotifymail.com',
  'newsletters@audible.com',
  'fightingback@messages.cancer.org',
  '@messages.cancer.org',

  // Newsletter/marketing — inbox-zero AI handles these
  'eff.org',
  'rccetimes.com',
  'group-digests@linkedin.com',
  'info.knologyupclose.com',
  'newsletter@theorangepeel.net',
  'microsoft@e-mail.microsoft.com',
  'newsletters-no-reply@myfonts.com',
  'act@credoaction.com',
  'yourpowertip@powershell.com',
  'email@email.microsoftemail.com',
  'ramit@iwillteachyoutoberich.com',
  'mkt@manning.com',
  'deals@livingsocial.com',
  'idera.com',
  'newsletter@kirkusreviews.com',
  'email@earthfare-email.com',
  'gameinfo@email2.telltalegames.com',
  'no-reply@mail.goodreads.com',
  'angieslist@members.angieslist.com',
  'reply@e.taxact.com',
  'josabank@shop.josbank.com',
  'frenchpaperco@gmail.com',
  'csaimages@frenchpaper.com',
  'mailman@xoxide.com',
  'info@petsafe.net',
  'flor@news.flor.com',
  'info@launchtn.org',
  'alumni@tntech.edu',
  'info@rockthevote.com',
  'payscalemonitor@mail.payscale.com',
  'statefarm@e.statefarm.com',
  'mailer@svpply.com',
  'noreply@dontcrack.com',
  'info@paperandpolkadots.com',
  'dennis@adirondackguitar.com',
  'Yamaha_Corporation_of_America@mail.vresp.com',
  'carters.email@e.carters.com',
  'FTD@email.ftd.com',
  'info@email.glassdoor.com',
  'reply@glassdoor.com',
  'customerservice@1800petmeds.com',
  'news@crownclub.regmovies.com',
  'autonationspecials@autonation.chtah.com',
  'EddieBauerEmail@em.eddiebauer.com',
  'email@style.ballarddesigns.com',
  'barnesandnoble@m.bn.com',
  'sales@xoxide.com',
  'tripadvisor.com',
  'noreply@youtube.com',
  'donotreply@proguitarshop.com',
  'info@knoxvilleacademyofmusic.com',
  'artistupdates@reverbnation.com',
  'promotion@mwave.com',
  'deansbeans.com',
  'express@e.express.com',
  'alice@email.aliceupdates.com',
  'ispcm-conf.org',
  'no_reply@jetbrains.com',
  'noreply@roddenberry.com',
  'yourhondadealer@ahmdcms.com',
  'mdegan@jacsmechanical.com',
];

// Subject patterns — delete filters matching these subjects
// (only when combined with a dead/irrelevant from, handled separately below)
// For now these are standalone subject-only filters to delete
var DELETE_SUBJECT_PATTERNS = [
  'Abandonia Newsletter',
];

// List patterns (mailing list ID in filter query)
var DELETE_LIST_PATTERNS = [
  'oakridgemoms.googlegroups.com',
  '14-days.googlegroups.com',
  '120331169_84238_19051',
  'andrewbird.fanbridge.com',
];

// Specific from+subject combos — delete if BOTH match
var DELETE_FROM_SUBJECT_PAIRS = [
  { from: 'linkedin.com', subject: 'endorsed' },
  { from: 'updates@linkedin.com', subject: null },   // skip inbox only, no label
  { from: 'connections@linkedin.com', subject: null }, // linkedin connection spam
  { from: 'noreply@plaxo.com', subject: 'birthday' },
  { from: 'confirm+ye22mger@facebookmail.com', subject: null }, // old specific fb filter
];

// ─────────────────────────────────────────────────────────────────────────────

function getFiltersToDelete_() {
  var response = Gmail.Users.Settings.Filters.list('me');
  var filters = response.filter || [];
  var toDelete = [];

  filters.forEach(function(f) {
    var from = (f.criteria && f.criteria.from) ? f.criteria.from.toLowerCase() : '';
    var subject = (f.criteria && f.criteria.subject) ? f.criteria.subject.toLowerCase() : '';
    var query = (f.criteria && f.criteria.query) ? f.criteria.query.toLowerCase() : '';
    var shouldDelete = false;
    var reason = '';

    // Check from patterns
    DELETE_FROM_PATTERNS.forEach(function(p) {
      if (from.indexOf(p.toLowerCase()) !== -1) {
        shouldDelete = true;
        reason = 'from matches: ' + p;
      }
    });

    // Check subject patterns
    if (!shouldDelete) {
      DELETE_SUBJECT_PATTERNS.forEach(function(p) {
        if (subject.indexOf(p.toLowerCase()) !== -1) {
          shouldDelete = true;
          reason = 'subject matches: ' + p;
        }
      });
    }

    // Check list patterns in query
    if (!shouldDelete) {
      DELETE_LIST_PATTERNS.forEach(function(p) {
        if (query.indexOf(p.toLowerCase()) !== -1) {
          shouldDelete = true;
          reason = 'list matches: ' + p;
        }
      });
    }

    // Check from+subject pairs
    if (!shouldDelete) {
      DELETE_FROM_SUBJECT_PAIRS.forEach(function(pair) {
        var fromMatch = pair.from ? from.indexOf(pair.from.toLowerCase()) !== -1 : true;
        var subjectMatch = pair.subject ? subject.indexOf(pair.subject.toLowerCase()) !== -1 : true;
        if (fromMatch && subjectMatch && (pair.from || pair.subject)) {
          shouldDelete = true;
          reason = 'pair match: from=' + pair.from + ' subject=' + pair.subject;
        }
      });
    }

    if (shouldDelete) {
      toDelete.push({ id: f.id, criteria: f.criteria, action: f.action, reason: reason });
    }
  });

  return { all: filters, toDelete: toDelete };
}

function dryRun() {
  Logger.log('=== DRY RUN — no filters will be deleted ===');
  var result = getFiltersToDelete_();
  Logger.log('Total filters: ' + result.all.length);
  Logger.log('Filters that WOULD be deleted: ' + result.toDelete.length);
  Logger.log('');

  result.toDelete.forEach(function(f) {
    Logger.log('DELETE [' + f.id + ']');
    Logger.log('  From: ' + (f.criteria.from || ''));
    Logger.log('  Subject: ' + (f.criteria.subject || ''));
    Logger.log('  Query: ' + (f.criteria.query || ''));
    Logger.log('  Reason: ' + f.reason);
    Logger.log('');
  });

  Logger.log('=== Filters that will be KEPT ===');
  var kept = result.all.filter(function(f) {
    return !result.toDelete.some(function(d) { return d.id === f.id; });
  });
  kept.forEach(function(f) {
    Logger.log('KEEP [' + f.id + '] from=' + (f.criteria.from || '') +
               ' subject=' + (f.criteria.subject || '') +
               ' query=' + (f.criteria.query || ''));
  });
}

function deleteFilters() {
  Logger.log('=== Deleting filters ===');
  var result = getFiltersToDelete_();
  Logger.log('Deleting ' + result.toDelete.length + ' of ' + result.all.length + ' filters...');

  var deleted = 0;
  result.toDelete.forEach(function(f) {
    try {
      Gmail.Users.Settings.Filters.remove('me', f.id);
      Logger.log('Deleted [' + f.id + '] from=' + (f.criteria.from || '') + ' (' + f.reason + ')');
      deleted++;
      Utilities.sleep(200);
    } catch(e) {
      Logger.log('ERROR deleting [' + f.id + ']: ' + e.message);
    }
  });

  Logger.log('Done. Deleted ' + deleted + ' filters.');
  Logger.log('Remaining: ' + (result.all.length - deleted) + ' filters.');
}