import { existsSync, readdirSync, readFileSync } from 'node:fs';
import { resolve } from 'node:path';
import { parseEventSource } from '../src/data/event-parser';
import { validateEventCollection } from '../src/data/event-schema';

const eventDirectory = resolve(process.cwd(), 'content/events');
const eventFiles = readdirSync(eventDirectory).filter((file) => file.endsWith('.md')).sort();

if (eventFiles.length === 0) {
  throw new Error(`No event Markdown files found in ${eventDirectory}`);
}

const events = eventFiles.map((file) => {
  const filePath = resolve(eventDirectory, file);
  const event = parseEventSource(readFileSync(filePath, 'utf8'), file);
  const posterPath = resolve(eventDirectory, event.poster);

  if (!posterPath.startsWith(`${eventDirectory}/`) || !existsSync(posterPath)) {
    throw new Error(`${file}: poster does not exist next to the event Markdown file: ${event.poster}`);
  }

  return event;
});

validateEventCollection(events);
console.log(`Validated ${events.length} event file${events.length === 1 ? '' : 's'}.`);