import { DatabaseSync } from 'node:sqlite';
import path from 'node:path';
import { config } from './config.js';

const db = new DatabaseSync(path.join(config.DATA_DIR, 'playbull.db'));

db.exec(`
  PRAGMA journal_mode = WAL;

  CREATE TABLE IF NOT EXISTS users (
    id            INTEGER PRIMARY KEY AUTOINCREMENT,
    username      TEXT UNIQUE NOT NULL,
    password_hash TEXT NOT NULL,
    balance       REAL NOT NULL DEFAULT 0,
    avatar        TEXT DEFAULT '🐂',
    created_at     INTEGER NOT NULL
  );

  CREATE TABLE IF NOT EXISTS holdings (
    id        INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id   INTEGER NOT NULL,
    symbol    TEXT NOT NULL,
    quantity  REAL NOT NULL DEFAULT 0,
    avg_price REAL NOT NULL DEFAULT 0,
    UNIQUE(user_id, symbol)
  );

  CREATE TABLE IF NOT EXISTS trades (
    id      INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER NOT NULL,
    symbol  TEXT NOT NULL,
    side    TEXT NOT NULL,
    qty     REAL NOT NULL,
    price   REAL NOT NULL,
    ts      INTEGER NOT NULL
  );

  CREATE TABLE IF NOT EXISTS games (
    id      INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id INTEGER NOT NULL,
    game    TEXT NOT NULL,
    bet     REAL NOT NULL,
    payout  REAL NOT NULL,
    result  TEXT,
    ts      INTEGER NOT NULL
  );

  CREATE TABLE IF NOT EXISTS feed (
    id      INTEGER PRIMARY KEY AUTOINCREMENT,
    kind    TEXT NOT NULL,
    text    TEXT NOT NULL,
    ts      INTEGER NOT NULL
  );

  CREATE TABLE IF NOT EXISTS uploads (
    id        INTEGER PRIMARY KEY AUTOINCREMENT,
    user_id   INTEGER NOT NULL,
    url       TEXT NOT NULL,
    frame     TEXT NOT NULL DEFAULT 'gallery',
    focus_x   REAL DEFAULT 0.5,
    focus_y   REAL DEFAULT 0.5,
    zoom      REAL DEFAULT 1.0,
    created_at INTEGER NOT NULL
  );
`);

// Migration: Avatar-Bild + Positions-Metadaten
const userCols = db.prepare('PRAGMA table_info(users)').all().map((c) => c.name);
if (!userCols.includes('avatar_image')) db.exec('ALTER TABLE users ADD COLUMN avatar_image TEXT');
if (!userCols.includes('avatar_focus_x')) db.exec('ALTER TABLE users ADD COLUMN avatar_focus_x REAL DEFAULT 0.5');
if (!userCols.includes('avatar_focus_y')) db.exec('ALTER TABLE users ADD COLUMN avatar_focus_y REAL DEFAULT 0.5');
if (!userCols.includes('avatar_zoom')) db.exec('ALTER TABLE users ADD COLUMN avatar_zoom REAL DEFAULT 1.0');

export default db;

// ---- User Helpers ----
export const Users = {
  create(username, hash, balance) {
    const info = db.prepare(
      'INSERT INTO users (username, password_hash, balance, created_at) VALUES (?,?,?,?)'
    ).run(username, hash, balance, Date.now());
    return this.byId(info.lastInsertRowid);
  },
  byId(id) {
    return db.prepare('SELECT * FROM users WHERE id = ?').get(id);
  },
  byName(name) {
    return db.prepare('SELECT * FROM users WHERE username = ? COLLATE NOCASE').get(name);
  },
  all() {
    return db.prepare(`
      SELECT id, username, balance, avatar, avatar_image, avatar_focus_x, avatar_focus_y, avatar_zoom, created_at
      FROM users ORDER BY balance DESC
    `).all();
  },
  setBalance(id, balance) {
    db.prepare('UPDATE users SET balance = ? WHERE id = ?').run(Math.max(0, balance), id);
  },
  addBalance(id, delta) {
    const u = this.byId(id);
    if (!u) return null;
    const nb = Math.max(0, u.balance + delta);
    db.prepare('UPDATE users SET balance = ? WHERE id = ?').run(nb, id);
    return nb;
  },
  setAvatar(id, avatar) {
    db.prepare('UPDATE users SET avatar = ? WHERE id = ?').run(avatar, id);
  },
  setAvatarImage(id, imagePath, focusX, focusY, zoom) {
    db.prepare(`
      UPDATE users SET avatar_image = ?, avatar_focus_x = ?, avatar_focus_y = ?, avatar_zoom = ?
      WHERE id = ?
    `).run(imagePath, focusX, focusY, zoom, id);
  },
  setAvatarPosition(id, focusX, focusY, zoom) {
    db.prepare(`
      UPDATE users SET avatar_focus_x = ?, avatar_focus_y = ?, avatar_zoom = ?
      WHERE id = ?
    `).run(focusX, focusY, zoom, id);
  },
  clearAvatarImage(id) {
    db.prepare(`
      UPDATE users SET avatar_image = NULL, avatar_focus_x = 0.5, avatar_focus_y = 0.5, avatar_zoom = 1.0
      WHERE id = ?
    `).run(id);
  },
  count() {
    return db.prepare('SELECT COUNT(*) c FROM users').get().c;
  },
};

// ---- Holdings Helpers ----
export const Holdings = {
  forUser(userId) {
    return db.prepare('SELECT * FROM holdings WHERE user_id = ?').all(userId);
  },
  get(userId, symbol) {
    return db.prepare('SELECT * FROM holdings WHERE user_id = ? AND symbol = ?').get(userId, symbol);
  },
  upsert(userId, symbol, quantity, avgPrice) {
    db.prepare(`
      INSERT INTO holdings (user_id, symbol, quantity, avg_price) VALUES (?,?,?,?)
      ON CONFLICT(user_id, symbol) DO UPDATE SET quantity = excluded.quantity, avg_price = excluded.avg_price
    `).run(userId, symbol, quantity, avgPrice);
  },
  remove(userId, symbol) {
    db.prepare('DELETE FROM holdings WHERE user_id = ? AND symbol = ?').run(userId, symbol);
  },
};

export const Trades = {
  add(userId, symbol, side, qty, price) {
    db.prepare('INSERT INTO trades (user_id, symbol, side, qty, price, ts) VALUES (?,?,?,?,?,?)')
      .run(userId, symbol, side, qty, price, Date.now());
  },
  forUser(userId, limit = 50) {
    return db.prepare('SELECT * FROM trades WHERE user_id = ? ORDER BY ts DESC LIMIT ?').all(userId, limit);
  },
};

export const Games = {
  add(userId, game, bet, payout, result) {
    db.prepare('INSERT INTO games (user_id, game, bet, payout, result, ts) VALUES (?,?,?,?,?,?)')
      .run(userId, game, bet, payout, JSON.stringify(result || {}), Date.now());
  },
  forUser(userId, limit = 50) {
    return db.prepare('SELECT * FROM games WHERE user_id = ? ORDER BY ts DESC LIMIT ?').all(userId, limit);
  },
};

export const Feed = {
  add(kind, text) {
    db.prepare('INSERT INTO feed (kind, text, ts) VALUES (?,?,?)').run(kind, text, Date.now());
    // alte Eintraege aufraeumen
    db.prepare('DELETE FROM feed WHERE id NOT IN (SELECT id FROM feed ORDER BY ts DESC LIMIT 100)').run();
  },
  recent(limit = 30) {
    return db.prepare('SELECT * FROM feed ORDER BY ts DESC LIMIT ?').all(limit);
  },
};

export const Uploads = {
  forUser(userId) {
    return db.prepare('SELECT * FROM uploads WHERE user_id = ? ORDER BY created_at DESC').all(userId);
  },
  byId(id) {
    return db.prepare('SELECT * FROM uploads WHERE id = ?').get(id);
  },
  create(userId, frame, focusX, focusY, zoom) {
    const info = db.prepare(`
      INSERT INTO uploads (user_id, url, frame, focus_x, focus_y, zoom, created_at)
      VALUES (?,?,?,?,?,?,?)
    `).run(userId, 'pending', frame, focusX, focusY, zoom, Date.now());
    return this.byId(info.lastInsertRowid);
  },
  setUrl(id, url) {
    db.prepare('UPDATE uploads SET url = ? WHERE id = ?').run(url, id);
    return this.byId(id);
  },
  setPosition(id, focusX, focusY, zoom) {
    db.prepare('UPDATE uploads SET focus_x = ?, focus_y = ?, zoom = ? WHERE id = ?')
      .run(focusX, focusY, zoom, id);
    return this.byId(id);
  },
  remove(id) {
    db.prepare('DELETE FROM uploads WHERE id = ?').run(id);
  },
};