/**
 * Daily change digest (PRODUCT.md P1.1) — diff today's signal snapshots
 * against the previous ones, join with stored news catalysts, and post to
 * Discord (DISCORD_WEBHOOK_URL) or print to the terminal.
 *
 * RUN ORDER MATTERS — screen first, digest second:
 *   30 16 * * 1-5 cd /path/to/app && npm run screen:daily && npm run digest:daily
 *
 * Usage:
 *   npm run digest:daily                  # today
 *   npm run digest:daily -- 2026-06-09    # specific day
 */

import 'dotenv/config';
import {
  createDb,
  DatabaseConnection,
  QueryAudit,
  SignalSnapshotRepository,
} from '../server/domains/shared';
import { NewsRepository } from '../server/domains/news';
import { DigestService, DiscordNotifier } from '../server/domains/digest';

const db = new DatabaseConnection(createDb(process.env.DB_PATH ?? './market-screener.db'), {
  audit: new QueryAudit(),
  logSlowQueries: 100,
});

const consoleLogger = {
  log: (...args: unknown[]) => console.log(...args), // eslint-disable-line no-console
  warn: (...args: unknown[]) => console.warn(...args),
  write: (msg: string) => process.stdout.write(msg),
};

const dateArg = process.argv[2];
const date =
  dateArg && /^\d{4}-\d{2}-\d{2}$/.test(dateArg) ? dateArg : new Date().toISOString().slice(0, 10);

const digest = new DigestService(new SignalSnapshotRepository(db), new NewsRepository(db));
const report = digest.build(date);

/* eslint-disable no-console */
console.log(`\n📊 Daily Signal Digest — ${report.date}`);
console.log(`Tickers snapshotted: ${report.snapshotCount}`);

if (report.snapshotCount === 0) {
  console.log('\nNo snapshots for this date. Run `npm run screen:daily` first.');
  process.exit(0);
}

if (report.changes.length === 0) {
  console.log('No signal changes since the previous snapshots. Calm day.');
} else {
  console.log(`\nSignal changes (${report.changes.length}):`);
  for (const c of report.changes) {
    const delta =
      c.scoreDelta != null ? ` (score ${c.scoreDelta > 0 ? '+' : ''}${c.scoreDelta})` : '';
    console.log(`\n  ${c.ticker}: ${c.previousSignal} → ${c.newSignal}${delta}`);
    if (c.catalysts.length === 0) {
      console.log('    no catalyst found — moved on fundamentals/market data');
    }
    for (const s of c.catalysts.slice(0, 3)) {
      console.log(`    [${s.catalyst ?? 'news'}] ${s.headline}`);
    }
  }
}

if (report.maStories.length > 0) {
  console.log(`\n🔱 M&A activity (${report.maStories.length}):`);
  for (const s of report.maStories.slice(0, 5)) console.log(`  • ${s.headline}`);
}

if (report.newTickers.length > 0) {
  console.log(`\nFirst-time snapshots (no baseline yet): ${report.newTickers.join(', ')}`);
}

const notifier = new DiscordNotifier(consoleLogger);
if (notifier.enabled) {
  const sent = await notifier.send(report);
  console.log(sent ? '\nPosted to Discord ✓' : '\nDiscord post skipped/failed');
} else {
  console.log('\n(Set DISCORD_WEBHOOK_URL in .env to receive this as a Discord message.)');
}
/* eslint-enable no-console */
process.exit(0);