#!/usr/bin/env tsx
/**
 * Import Catholic churches and mass schedules from the BuscarMisas network.
 *
 * A group of 5 identical WordPress-based directories covering Latin America:
 *   - horariosmissa.com.br  (Brazil,    ~4,732 churches)
 *   - buscarmisas.com.mx   (Mexico,    ~3,950 churches)
 *   - horariosmisa.com.ar  (Argentina, ~3,012 churches)
 *   - buscarmisas.co       (Colombia,  ~2,665 churches)
 *   - horariomisa.cl       (Chile,       ~935 churches)
 *
 * Usage:
 *   npx tsx scripts/import-buscarmisas-network.ts --domain horariosmissa.com.br
 *   npx tsx scripts/import-buscarmisas-network.ts --domain horariosmissa.com.br --resume-from 500
 *   npx tsx scripts/import-buscarmisas-network.ts --all
 *   npx tsx scripts/import-buscarmisas-network.ts --domain horariosmissa.com.br --dry-run
 */

import dotenv from 'dotenv';
import path from 'path';

dotenv.config({ path: path.resolve(process.cwd(), '.env.local') });
dotenv.config({ path: path.resolve(process.cwd(), '.env') });

import { Pool } from 'pg';
import { PrismaPg } from '@prisma/adapter-pg';
import { PrismaClient } from '@prisma/client';

import { findDuplicateChurch } from '../src/lib/church-matcher';
import type { ExistingChurch } from '../src/lib/church-matcher';
import { getDayNamesForCountry, buildDayPatterns } from '../src/scrapers/i18n/day-names';

// ─── Site Config ─────────────────────────────────────────────────────────────

interface SiteConfig {
  country: string;          // ISO 3166-1 alpha-2
  language: 'pt' | 'es';
  sitemapType: 'page' | 'post';
}

const NETWORK_SITES: Record<string, SiteConfig> = {
  'horariosmissa.com.br': { country: 'BR', language: 'pt', sitemapType: 'page' },
  'buscarmisas.com.mx':   { country: 'MX', language: 'es', sitemapType: 'page' },
  'horariosmisa.com.ar':  { country: 'AR', language: 'es', sitemapType: 'page' },
  'buscarmisas.co':       { country: 'CO', language: 'es', sitemapType: 'page' },
  'horariomisa.cl':       { country: 'CL', language: 'es', sitemapType: 'post' },
};

// ─── Types ────────────────────────────────────────────────────────────────────

interface ParsedChurch {
  name: string;
  address: string | null;
  city: string | null;
  state: string | null;
  phone: string | null;
  lat: number;
  lng: number;
  externalId: string;
  country: string;
}

interface ParsedMass {
  dayOfWeek: number;  // 0 = Sunday, 6 = Saturday
  time: string;       // HH:MM 24-hour
}

interface CLIArgs {
  domain: string | null;
  all: boolean;
  dryRun: boolean;
  resumeFrom: number;
  limit: number | null;
  jobId: string | null;
}

interface ImportStats {
  total: number;
  created: number;
  updated: number;
  skipped: number;
  errors: number;
  massSchedulesCreated: number;
}

// ─── Helpers ─────────────────────────────────────────────────────────────────

/**
 * Build external ID for a church URL.
 * Format: "{domain-slug}/{church-slug}"
 * e.g. "horariosmissa-com-br/paroquia-nossa-senhora-dos-remedios"
 */
export function buildExternalId(domain: string, churchUrl: string): string {
  const domainSlug = domain.replace(/\./g, '-');
  // URL path: /{region}/{city}/{church-slug}/
  const segments = churchUrl.replace(/\/$/, '').split('/').filter(Boolean);
  const churchSlug = segments[segments.length - 1] || '';
  return `${domainSlug}/${churchSlug}`;
}

/**
 * Parse church data from a church page HTML string.
 * Returns null if name or coordinates cannot be extracted.
 */
export function parseChurchPage(
  html: string,
  domain: string,
  churchUrl: string,
  config: SiteConfig,
): ParsedChurch | null {
  // Name: cell after <strong>Nome</strong> (PT) or <strong>Nombre</strong> (ES)
  const nameLabel = config.language === 'pt' ? 'Nome' : 'Nombre';
  const nameMatch = html.match(
    new RegExp(`<strong>${nameLabel}<\\/strong><\\/td>\\s*<td>([^<]+)<\\/td>`, 'i')
  );
  const name = nameMatch?.[1]?.trim() ?? '';
  if (!name) return null;

  // Coordinates: Google Maps iframe center= parameter
  const coordMatch = html.match(/center=([-\d.]+)%2C([-\d.]+)/i);
  if (!coordMatch) return null;
  const lat = parseFloat(coordMatch[1]);
  const lng = parseFloat(coordMatch[2]);
  if (!isFinite(lat) || !isFinite(lng) || Math.abs(lat) > 90 || Math.abs(lng) > 180) return null;

  // Address: cell after <strong>Endereço</strong> (PT) or <strong>Dirección</strong> (ES)
  const addrLabel = config.language === 'pt' ? 'Endere[çc]o' : 'Direcci[oó]n';
  const addrMatch = html.match(
    new RegExp(`<strong>${addrLabel}<\\/strong><\\/td>\\s*<td>([^<]+)<\\/td>`, 'i')
  );
  const address = addrMatch?.[1]?.trim() ?? null;

  // Phone: tel: href
  const phoneMatch = html.match(/href="tel:([^"]+)"/i);
  const phone = phoneMatch?.[1]?.trim() ?? null;

  // City and state from URL path segments
  // URL form: https://{domain}/{state}/{city}/{slug}/
  const urlPath = new URL(churchUrl).pathname.split('/').filter(Boolean);
  const state = urlPath[0] ? decodeURIComponent(urlPath[0].replace(/-/g, ' ')) : null;
  const city  = urlPath[1] ? decodeURIComponent(urlPath[1].replace(/-/g, ' ')) : null;

  return {
    name,
    address,
    city,
    state,
    phone,
    lat,
    lng,
    externalId: buildExternalId(domain, churchUrl),
    country: config.country,
  };
}

/**
 * Parse the weekly mass schedule table from church page HTML.
 * Table format: day-name cell | time cell (comma-separated times, "-" = no mass)
 */
export function parseMassSchedule(html: string, countryCode: string): ParsedMass[] {
  const dayPatterns = buildDayPatterns(getDayNamesForCountry(countryCode));
  const results: ParsedMass[] = [];

  // Extract all <td> cells as pairs [day, time]
  const cells = [...html.matchAll(/<td[^>]*>(.*?)<\/td>/gis)].map(m =>
    m[1].replace(/<[^>]+>/g, '').trim()
  );

  for (let i = 0; i + 1 < cells.length; i += 2) {
    const dayCell = cells[i].toLowerCase();
    const timeCell = cells[i + 1];

    const dayOfWeek = dayPatterns[dayCell];
    if (dayOfWeek === undefined) continue;
    if (timeCell === '-' || !timeCell) continue;

    // Split comma-separated times: "10:00, 18:00" → ["10:00", "18:00"]
    for (const rawTime of timeCell.split(',')) {
      const time = rawTime.trim();
      if (/^\d{1,2}:\d{2}$/.test(time)) {
        results.push({ dayOfWeek, time });
      }
    }
  }
  return results;
}

// ─── HTTP Helpers ─────────────────────────────────────────────────────────────

const USER_AGENT = 'NearestMass-Importer/1.0 (parish data aggregator; contact: privacy@nearestmass.com)';
const REQUEST_DELAY_MS = 2_000;
const DOMAIN_DELAY_MS  = 5_000;

async function fetchText(url: string): Promise<string> {
  const res = await fetch(url, { headers: { 'User-Agent': USER_AGENT } });
  if (!res.ok) throw new Error(`HTTP ${res.status} for ${url}`);
  return res.text();
}

async function fetchWithRetry(url: string, retries = 3): Promise<string> {
  for (let attempt = 1; attempt <= retries; attempt++) {
    try {
      return await fetchText(url);
    } catch (err) {
      const msg = err instanceof Error ? err.message : String(err);
      if (attempt === retries) throw err;
      const isRetryable = msg.includes('429') || msg.includes('503');
      if (!isRetryable) throw err;
      const backoff = attempt * 30_000; // 30s, 60s, 90s
      console.warn(`  [retry ${attempt}/${retries}] ${msg} — waiting ${backoff / 1000}s`);
      await sleep(backoff);
    }
  }
  throw new Error('unreachable');
}

function sleep(ms: number): Promise<void> {
  return new Promise(resolve => setTimeout(resolve, ms));
}

// ─── Sitemap Discovery ────────────────────────────────────────────────────────

/**
 * Fetch all church page URLs for a domain from its sitemap.
 * Church URLs have exactly 3 path segments: /{region}/{city}/{slug}/
 */
export async function getChurchUrls(domain: string, config: SiteConfig): Promise<string[]> {
  const indexUrl = `https://${domain}/sitemap_index.xml`;
  console.log(`Fetching sitemap index: ${indexUrl}`);
  const indexXml = await fetchWithRetry(indexUrl);

  // Extract child sitemap URLs matching the sitemapType
  const childPattern = config.sitemapType === 'page'
    ? /https:\/\/[^<]*\/page-sitemap\d*\.xml/g
    : /https:\/\/[^<]*\/post-sitemap\.xml/g;

  const childUrls = [...indexXml.matchAll(childPattern)].map(m => m[0]);
  console.log(`  Found ${childUrls.length} child sitemaps`);

  const churchUrls: string[] = [];
  for (const sitemapUrl of childUrls) {
    const xml = await fetchWithRetry(sitemapUrl);
    const locs = [...xml.matchAll(/<loc>([^<]+)<\/loc>/g)].map(m => m[1].trim());
    for (const loc of locs) {
      // Church URLs: exactly 3 non-empty path segments after the domain
      try {
        const segments = new URL(loc).pathname.split('/').filter(Boolean);
        if (segments.length === 3) {
          churchUrls.push(loc);
        }
      } catch { /* skip malformed URLs */ }
    }
  }

  // Deduplicate
  const unique = [...new Set(churchUrls)];
  console.log(`  Total church URLs: ${unique.length}`);
  return unique;
}