import Database from 'better-sqlite3';
import path from 'node:path';
import { fileURLToPath } from 'node:url';

const __dirname = path.dirname(fileURLToPath(import.meta.url));
const dbPath = path.join(__dirname, 'data.db');

export const db = new Database(dbPath);
db.pragma('journal_mode = WAL');
db.pragma('foreign_keys = ON');

db.exec(`
  CREATE TABLE IF NOT EXISTS users (
    id            INTEGER PRIMARY KEY AUTOINCREMENT,
    username      TEXT NOT NULL UNIQUE,
    password_hash TEXT NOT NULL,
    created_at    TEXT NOT NULL DEFAULT (datetime('now'))
  );

  CREATE TABLE IF NOT EXISTS articles (
    id              TEXT PRIMARY KEY,
    title           TEXT NOT NULL,
    category        TEXT,
    type            TEXT,
    author          TEXT,
    author_role     TEXT,
    author_initial  TEXT,
    publish_date    TEXT,
    pages           INTEGER DEFAULT 0,
    price           INTEGER DEFAULT 0,
    is_free         INTEGER DEFAULT 1,
    summary         TEXT,
    body            TEXT,
    cover_image     TEXT,
    tags            TEXT,
    featured        INTEGER DEFAULT 0,
    created_at      TEXT NOT NULL DEFAULT (datetime('now')),
    updated_at      TEXT NOT NULL DEFAULT (datetime('now'))
  );

  CREATE INDEX IF NOT EXISTS idx_articles_created ON articles(created_at DESC);
  CREATE INDEX IF NOT EXISTS idx_articles_featured ON articles(featured);
`);

export function rowToArticle(row) {
  if (!row) return null;
  return {
    id: row.id,
    title: row.title,
    category: row.category,
    type: row.type,
    author: row.author,
    authorRole: row.author_role,
    authorInitial: row.author_initial,
    publishDate: row.publish_date,
    pages: row.pages,
    price: row.price,
    isFree: !!row.is_free,
    summary: row.summary,
    body: row.body,
    coverImage: row.cover_image,
    tags: row.tags ? JSON.parse(row.tags) : [],
    featured: !!row.featured,
    createdAt: row.created_at,
    updatedAt: row.updated_at,
  };
}