const Database = require("better-sqlite3");
const sqliteVec = require("sqlite-vec");

let archiveDb = null;
let intelligenceDb = null;

function getArchiveDb(dbPath) {
  if (!archiveDb) {
    archiveDb = new Database(dbPath, { readonly: true });
    sqliteVec.load(archiveDb);
    archiveDb.pragma("journal_mode = WAL");
  }
  return archiveDb;
}

function getIntelligenceDb(dbPath) {
  if (!intelligenceDb) {
    intelligenceDb = new Database(dbPath);
    intelligenceDb.pragma("journal_mode = WAL");
  }
  return intelligenceDb;
}

function runMigrations(db) {
  db.exec(`
    CREATE TABLE IF NOT EXISTS cursors (
      key TEXT PRIMARY KEY,
      value INTEGER
    );

    CREATE TABLE IF NOT EXISTS tracked_companies (
      id INTEGER PRIMARY KEY,
      name TEXT,
      ticker TEXT,
      aliases TEXT
    );

    CREATE TABLE IF NOT EXISTS article_queue (
      id INTEGER PRIMARY KEY,
      article_id INTEGER UNIQUE,
      status TEXT DEFAULT 'pending',
      created_at DATETIME DEFAULT CURRENT_TIMESTAMP,
      updated_at DATETIME
    );

    CREATE TABLE IF NOT EXISTS event_knowledge (
      id INTEGER PRIMARY KEY,
      event_id INTEGER,
      company_id INTEGER,
      type TEXT,
      data TEXT,
      created_at DATETIME DEFAULT CURRENT_TIMESTAMP
    );

    CREATE TABLE IF NOT EXISTS company_embeddings (
      company_id INTEGER PRIMARY KEY,
      embedding BLOB NOT NULL,
      model TEXT NOT NULL,
      generated_at DATETIME DEFAULT CURRENT_TIMESTAMP
    );

    CREATE TABLE IF NOT EXISTS event_predictions (
      id INTEGER PRIMARY KEY,
      event_id INTEGER,
      company_id INTEGER,
      type TEXT,
      direction TEXT,
      magnitude TEXT,
      timeframe TEXT,
      rationale TEXT,
      created_at DATETIME DEFAULT CURRENT_TIMESTAMP
    );
  `);
}

function seedCompanies(db) {
  const count = db.prepare("SELECT COUNT(*) as c FROM tracked_companies").get().c;
  if (count > 0) return;

  const insert = db.prepare(
    "INSERT INTO tracked_companies (name, ticker, aliases) VALUES (?, ?, ?)"
  );

  const companies = [
    // semiconductors
    { name: "NVIDIA", ticker: "NVDA", aliases: ["Nvidia Corporation"] },
    { name: "TSMC", ticker: "TSM", aliases: ["Taiwan Semiconductor", "Taiwan Semiconductor Manufacturing Company"] },
    { name: "ASML", ticker: "ASML", aliases: ["ASML Holding"] },
    { name: "Intel", ticker: "INTC", aliases: ["Intel Corporation"] },
    { name: "AMD", ticker: "AMD", aliases: ["Advanced Micro Devices"] },
    { name: "Qualcomm", ticker: "QCOM", aliases: ["Qualcomm Incorporated"] },
    { name: "Broadcom", ticker: "AVGO", aliases: ["Broadcom Inc"] },
    { name: "Micron", ticker: "MU", aliases: ["Micron Technology"] },
    { name: "Texas Instruments", ticker: "TXN", aliases: ["TI"] },
    { name: "Applied Materials", ticker: "AMAT", aliases: ["Applied Materials Inc"] },
    { name: "Lam Research", ticker: "LRCX", aliases: ["Lam Research Corporation"] },
    { name: "KLA Corporation", ticker: "KLAC", aliases: ["KLA"] },
    { name: "Samsung", ticker: "005930.KS", aliases: ["Samsung Electronics", "Samsung Group"] },
    { name: "SK Hynix", ticker: "000660.KS", aliases: ["Hynix"] },

    // big tech / cloud
    { name: "Microsoft", ticker: "MSFT", aliases: ["Microsoft Corporation"] },
    { name: "Apple", ticker: "AAPL", aliases: ["Apple Inc"] },
    { name: "Alphabet", ticker: "GOOGL", aliases: ["Google", "Google LLC", "DeepMind"] },
    { name: "Amazon", ticker: "AMZN", aliases: ["Amazon Web Services", "AWS"] },
    { name: "Meta", ticker: "META", aliases: ["Meta Platforms", "Facebook"] },
    { name: "Tesla", ticker: "TSLA", aliases: ["Tesla Inc", "Tesla Motors"] },

    // AI / infrastructure
    { name: "OpenAI", ticker: "OPENAI", aliases: ["Open AI"] },
    { name: "Anthropic", ticker: "ANTHROPIC", aliases: [] },
    { name: "xAI", ticker: "XAI", aliases: ["x.AI"] },
    { name: "Palantir", ticker: "PLTR", aliases: ["Palantir Technologies"] },
    { name: "Super Micro Computer", ticker: "SMCI", aliases: ["Supermicro", "SMCI"] },
    { name: "Arista Networks", ticker: "ANET", aliases: ["Arista"] },

    // networking / hardware
    { name: "Cisco", ticker: "CSCO", aliases: ["Cisco Systems"] },
    { name: "Marvell Technology", ticker: "MRVL", aliases: ["Marvell"] },
    { name: "Arm Holdings", ticker: "ARM", aliases: ["Arm", "ARM Ltd"] },

    // enterprise software
    { name: "Oracle", ticker: "ORCL", aliases: ["Oracle Corporation"] },
    { name: "Salesforce", ticker: "CRM", aliases: ["Salesforce Inc"] },
    { name: "SAP", ticker: "SAP", aliases: ["SAP SE"] },
    { name: "ServiceNow", ticker: "NOW", aliases: [] },

    // storage / infra
    { name: "Western Digital", ticker: "WDC", aliases: ["WD", "Western Digital Corporation"] },
    { name: "Seagate", ticker: "STX", aliases: ["Seagate Technology"] },
    { name: "Pure Storage", ticker: "PSTG", aliases: [] },
  ];

  for (const c of companies) {
    insert.run(c.name, c.ticker, JSON.stringify(c.aliases));
  }

  console.log(`[db] seeded ${companies.length} tracked companies`);
}

module.exports = { getArchiveDb, getIntelligenceDb, runMigrations, seedCompanies };