import { DatabaseSync, type SQLOutputValue } from "node:sqlite";
import { Dump, type User } from "./interfaces.ts";

export const db = new DatabaseSync("api/sql/gerbeur.db");

/**
 * Database Row Types
 */

export interface DumpRow {
  id: string;
  title: string;
  description: string | null;
  user_id: string;
  created_at: string;
  [key: string]: SQLOutputValue; // Index signature
}

export interface UserRow {
  id: string;
  username: string;
  password_hash: string;
  is_admin: number;
  created_at: string;
  [key: string]: SQLOutputValue; // Index signature
}

/**
 * Type Guards
 */

export function isDumpRow(obj: Record<string, SQLOutputValue>): obj is DumpRow {
  return !!obj &&
    typeof obj === "object" &&
    "id" in obj && typeof obj.id === "string" &&
    "title" in obj && typeof obj.title === "string" &&
    "description" in obj &&
    (typeof obj.description === "string" || obj.description === null) &&
    "user_id" in obj && typeof obj.user_id === "string" &&
    "created_at" in obj && typeof obj.created_at === "string";
}

export function isUserRow(obj: Record<string, SQLOutputValue>): obj is UserRow {
  return !!obj &&
    typeof obj === "object" &&
    "id" in obj && typeof obj.id === "string" &&
    "username" in obj && typeof obj.username === "string" &&
    "password_hash" in obj && typeof obj.password_hash === "string" &&
    "is_admin" in obj && typeof obj.is_admin === "number" &&
    "created_at" in obj && typeof obj.created_at === "string";
}

/**
 * Conversion Helpers
 */

export function dumpRowToApi(
  row: DumpRow,
): Dump {
  return {
    id: row.id,
    title: row.title,
    description: row.description ?? undefined,
    userId: row.user_id,
    createdAt: new Date(row.created_at),
  };
}

export function dumpApiToRow(dump: Dump): DumpRow {
  return {
    id: dump.id,
    title: dump.title,
    description: dump.description ?? null,
    user_id: dump.userId,
    created_at: dump.createdAt.toISOString(),
  };
}

export function userRowToApi(row: UserRow): User {
  return {
    id: row.id,
    username: row.username,
    passwordHash: row.password_hash,
    isAdmin: Boolean(row.is_admin),
    createdAt: new Date(row.created_at),
  };
}

export function userApiToRow(user: User): UserRow {
  return {
    id: user.id,
    username: user.username,
    password_hash: user.passwordHash,
    is_admin: user.isAdmin ? 1 : 0,
    created_at: user.createdAt.toISOString(),
  };
}