/**
 * pg-boss Job Scheduler — manages scrape jobs with adaptive timing.
 *
 * Job types:
 *   scrape:pricing:fs        — Every 4 hours for FS.com prices/stock
 *   scrape:pricing:optcore   — Every 6 hours for Optcore prices/stock
 *   scrape:pricing:atgbics   — Every 8 hours for ATGBICS prices/stock (GBP)
 *   scrape:pricing:prolabs   — Every 8 hours for ProLabs prices/stock (USD)
 *   scrape:compat:cisco      — Weekly for OEM compatibility matrices
 *   scrape:news              — Every 6 hours for trade press and news
 *   scrape:docs              — Weekly for manuals and datasheets
 *   scrape:faq               — Weekly for vendor FAQ/troubleshooting pages
 */
import PgBoss from "pg-boss";
import { config } from "dotenv";
import { join } from "path";
import { rmSync, mkdirSync } from "fs";

/** Run a scraper with an isolated Crawlee storage directory to prevent queue collisions */
async function withIsolatedStorage(name: string, fn: () => Promise<void>): Promise<void> {
  const dir = join(__dirname, "..", "..", "..", `storage-${name}`);
  mkdirSync(dir, { recursive: true });
  const prev = process.env.CRAWLEE_STORAGE_DIR;
  process.env.CRAWLEE_STORAGE_DIR = dir;
  try {
    await fn();
  } finally {
    process.env.CRAWLEE_STORAGE_DIR = prev ?? "";
    // Clean up after successful run
    try { rmSync(dir, { recursive: true, force: true }); } catch { /* ignore */ }
  }
}

config({ path: join(__dirname, "..", "..", "..", ".env") });

const connectionString = `postgres://${process.env.POSTGRES_USER || "tip"}:${process.env.POSTGRES_PASSWORD || "tip_dev_2026"}@${process.env.POSTGRES_HOST || "localhost"}:${process.env.POSTGRES_PORT || "5433"}/${process.env.POSTGRES_DB || "transceiver_db"}`;

export async function createScheduler(): Promise<PgBoss> {
  const boss = new PgBoss({
    connectionString,
    retryLimit: 3,
    retryDelay: 30,
    retryBackoff: true,
    expireInSeconds: 300, // 5 min timeout per job
    monitorStateIntervalSeconds: 30,
  });

  boss.on("error", (error) => console.error("pg-boss error:", error));

  await boss.start();
  console.log("pg-boss scheduler started");

  return boss;
}

export async function registerSchedules(boss: PgBoss): Promise<void> {
  // pg-boss v10: create queues before scheduling
  const queues = [
    "scrape:pricing:fs",
    "scrape:pricing:optcore",
    "scrape:pricing:10gtek",
    "scrape:pricing:atgbics",
    "scrape:pricing:prolabs",
    "scrape:compat:cisco",
    "scrape:pricing:flexoptix",
    "scrape:vendors:flexoptix",
    "scrape:news",
    "scrape:faq",
    "scrape:docs",
  ];
  for (const q of queues) {
    await boss.createQueue(q).catch(() => { /* already exists */ });
  }

  // v0.2.0: Increased frequencies for permanent price monitoring (R-SCAN)

  // FS.com pricing (every 4 hours — JS rendering is slow)
  await boss.schedule("scrape:pricing:fs", "0 */4 * * *", {}, {
    retryLimit: 2,
    expireInSeconds: 3600,
  });

  // Optcore pricing (every 4 hours — was 6h)
  await boss.schedule("scrape:pricing:optcore", "0 2/4 * * *", {}, {
    retryLimit: 2,
    expireInSeconds: 7200,
  });

  // Compatibility matrices (every Sunday at 3am)
  await boss.schedule("scrape:compat:cisco", "0 3 * * 0", {}, {
    retryLimit: 3,
    expireInSeconds: 3600,
  });

  // News aggregation (every 6 hours)
  await boss.schedule("scrape:news", "0 */6 * * *", {}, {
    retryLimit: 2,
    expireInSeconds: 1800,
  });

  // FAQ/KB scraping (every Wednesday at 2am)
  await boss.schedule("scrape:faq", "0 2 * * 3", {}, {
    retryLimit: 3,
    expireInSeconds: 3600,
  });

  // 10Gtek pricing (every 8 hours — Playwright, reasonable rate)
  await boss.schedule("scrape:pricing:10gtek", "0 */8 * * *", {}, {
    retryLimit: 2,
    expireInSeconds: 3600,
  });

  // ATGBICS pricing (every 8 hours — Shopify/Playwright, GBP prices)
  await boss.schedule("scrape:pricing:atgbics", "0 2/8 * * *", {}, {
    retryLimit: 2,
    expireInSeconds: 3600,
  });

  // ProLabs pricing (every 8 hours — Playwright, needs proxy for CloudFront)
  await boss.schedule("scrape:pricing:prolabs", "0 4/8 * * *", {}, {
    retryLimit: 2,
    expireInSeconds: 3600,
  });

  // Flexoptix catalog (every 2 hours — fetch-based, fast — R-SCAN requirement)
  await boss.schedule("scrape:pricing:flexoptix", "0 */2 * * *", {}, {
    retryLimit: 2,
    expireInSeconds: 3600,
  });

  // Flexoptix vendor list (weekly, Sunday at 6am — own data)
  await boss.schedule("scrape:vendors:flexoptix", "0 6 * * 0", {}, {
    retryLimit: 3,
    expireInSeconds: 600,
  });

  // Document/datasheet check (every Saturday at 4am)
  await boss.schedule("scrape:docs", "0 4 * * 6", {}, {
    retryLimit: 3,
    expireInSeconds: 7200,
  });

  console.log("All schedules registered");
}

export async function registerWorkers(boss: PgBoss): Promise<void> {
  // Lazy-load scrapers to avoid circular deps
  const { scrapeFs } = await import("./scrapers/fs-com");
  const { scrapeCiscoTmg } = await import("./scrapers/cisco-tmg");
  const { scrapeOptcore } = await import("./scrapers/optcore");
  const { scrape10Gtek } = await import("./scrapers/tenGtek");
  const { scrapeFlexoptixCatalog } = await import("./scrapers/flexoptix-catalog");
  const { scrapeFlexoptixVendors } = await import("./scrapers/flexoptix-vendors");
  const { scrapeNews } = await import("./scrapers/news");
  const { scrapeAtgbics } = await import("./scrapers/atgbics");
  const { scrapeProLabs } = await import("./scrapers/prolabs");

  await boss.work("scrape:pricing:fs", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: FS.com pricing`);
    await withIsolatedStorage("fs", scrapeFs);
  });

  await boss.work("scrape:pricing:optcore", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: Optcore pricing`);
    await withIsolatedStorage("optcore", scrapeOptcore);
  });

  await boss.work("scrape:compat:cisco", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: Cisco TMG`);
    await withIsolatedStorage("cisco", scrapeCiscoTmg);
  });

  await boss.work("scrape:pricing:10gtek", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: 10Gtek pricing`);
    await withIsolatedStorage("10gtek", scrape10Gtek);
  });

  await boss.work("scrape:pricing:flexoptix", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: Flexoptix catalog pricing`);
    await scrapeFlexoptixCatalog();
  });

  await boss.work("scrape:vendors:flexoptix", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: Flexoptix vendor list`);
    await scrapeFlexoptixVendors();
  });

  await boss.work("scrape:news", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: News aggregation`);
    await scrapeNews();
  });

  await boss.work("scrape:pricing:atgbics", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: ATGBICS pricing`);
    await withIsolatedStorage("atgbics", scrapeAtgbics);
  });

  await boss.work("scrape:pricing:prolabs", async (_job) => {
    console.log(`[${new Date().toISOString()}] Running: ProLabs pricing`);
    await withIsolatedStorage("prolabs", scrapeProLabs);
  });

  await boss.work("scrape:faq", async (_job) => {
    console.log(`[${new Date().toISOString()}] FAQ scraper — not yet implemented`);
  });

  await boss.work("scrape:docs", async (_job) => {
    console.log(`[${new Date().toISOString()}] Docs scraper — not yet implemented`);
  });

  console.log("All workers registered");
}