#!/usr/bin/env node
// ─────────────────────────────────────────────────────────────
// bin/joins.js — read the Bifrost join-click log.
//
// Every press of the final "Join Project Bifrost" CTA is recorded
// as its own row in the `bifrost_joins` table (who, when, session).
//
// Usage:
//   node bin/joins.js list              # every click, newest first
//   node bin/joins.js summary           # one row per user, with click count
//   node bin/joins.js for <email>       # full click history for one user
//   node bin/joins.js stats             # totals (clicks + unique users)
// ─────────────────────────────────────────────────────────────
import { q } from '../src/db.js';

const [, , cmd, arg] = process.argv;
const EMAIL_RE = /^[^@\s]+@[^@\s]+\.[^@\s]+$/;

function help() {
  console.log('Usage:');
  console.log('  joins list              # every click, newest first');
  console.log('  joins summary           # one row per user');
  console.log('  joins for <email>       # click history for a user');
  console.log('  joins stats             # totals');
  process.exit(1);
}

function iso(t) { return new Date(t).toISOString(); }
function shortSid(s) { return s ? `[${s.slice(0, 8)}…]` : ''; }

switch (cmd) {
  case 'list': {
    const rows = q.listJoins.all();
    if (rows.length === 0) { console.log('(no clicks yet)'); break; }
    for (const r of rows) {
      console.log(`  ${iso(r.clicked_at)}  ${r.email.padEnd(32)}  ${shortSid(r.session_id)}`);
    }
    console.log(`\n${rows.length} click${rows.length === 1 ? '' : 's'} total.`);
    break;
  }

  case 'summary': {
    const rows = q.summariseJoins.all();
    if (rows.length === 0) { console.log('(no clicks yet)'); break; }
    console.log('  CLICKS  FIRST                     LAST                      EMAIL');
    for (const r of rows) {
      const n = String(r.click_count).padStart(6);
      console.log(`  ${n}  ${iso(r.first_clicked_at)}  ${iso(r.last_clicked_at)}  ${r.email}`);
    }
    console.log(`\n${rows.length} unique user${rows.length === 1 ? '' : 's'}.`);
    break;
  }

  case 'for': {
    if (!arg || !EMAIL_RE.test(arg)) help();
    const email = arg.trim().toLowerCase();
    const rows = q.listJoinsForEmail.all(email);
    if (rows.length === 0) { console.log(`(no clicks for ${email})`); break; }
    console.log(`Clicks by ${email}:`);
    for (const r of rows) {
      console.log(`  ${iso(r.clicked_at)}  ${shortSid(r.session_id)}`);
    }
    console.log(`\n${rows.length} click${rows.length === 1 ? '' : 's'}.`);
    break;
  }

  case 'stats': {
    const total  = q.countJoins.get().n;
    const unique = q.countUniqueJoiners.get().n;
    console.log(`  total clicks:  ${total}`);
    console.log(`  unique users:  ${unique}`);
    break;
  }

  default:
    help();
}