import { pipe, Ok, Err, Some, None, mapResult, flatMap, match } from '@tecnomancy/alchemy';

// pipe — fully typed at every step
const result = pipe(
  '  Hello World  ',
  s => s.trim(),           // string → string
  s => s.toLowerCase(),    // string → string
  s => s.split(' '),       // string → string[]
  arr => arr.length,       // string[] → number
);
// result: 2  (TypeScript knows it's a number)

// Result — errors as values, no try/catch
const divide = (a: number, b: number) =>
  b === 0 ? Err('division by zero' as const) : Ok(a / b);

pipe(
  divide(10, 2),
  mapResult(n => n * 100),
  match(
    value => console.log('Result:', value), // 500
    error => console.error('Error:', error),
  ),
);

// Option — nullable without null checks
import { fromNullable, mapOption, unwrapOptionOr } from '@tecnomancy/alchemy';

const getUser = (id: number) => fromNullable(users.find(u => u.id === id));

pipe(
  getUser(42),
  mapOption(u => u.name),
  unwrapOptionOr('Anonymous'),
); // 'Alice' or 'Anonymous'

import { fromPromise, flatMapAsync, match } from '@tecnomancy/alchemy';

const getUser = async (id: string) => {
  const result = await fromPromise(fetch(`/api/users/${id}`).then(r => r.json()))
    .then(flatMapAsync(user => fromPromise(enrichUser(user))));

  return match(
    user  => ({ status: 'ok'    as const, user }),
    error => ({ status: 'error' as const, message: error.message }),
  )(result);
};

import { pipe, fromNullable, flatMapOption, mapOption, unwrapOptionOr } from '@tecnomancy/alchemy';

const getEventCoords = (user: User): string =>
  pipe(
    fromNullable(user.upcomingEvent),
    flatMapOption(e => fromNullable(e.location)),
    flatMapOption(l => fromNullable(l.coordinates)),
    mapOption(c => `${c.lat}, ${c.lng}`),
    unwrapOptionOr('Location unavailable'),
  );

import { Ok, Err, collectErrors, match } from '@tecnomancy/alchemy';

const validate = (form: SignupForm) =>
  match(
    ()       => ({ ok: true  as const, form }),
    (errors) => ({ ok: false as const, errors }),
  )(collectErrors([
    form.email.includes('@') ? Ok(form) : Err('Email is invalid'),
    form.password.length >= 8 ? Ok(form) : Err('Password too short'),
    form.age >= 18 ? Ok(form) : Err('Must be 18 or older'),
  ]));

import { Ok, Err, flatMap, mapResult } from '@tecnomancy/alchemy/result';
import { Some, None, fromNullable } from '@tecnomancy/alchemy/option';
import { pipe, compose, curry } from '@tecnomancy/alchemy/composition';
import { pipeAsync, retry, timeout } from '@tecnomancy/alchemy/async';
import { map, filter, groupBy } from '@tecnomancy/alchemy/array';
import { pick, omit, setPath } from '@tecnomancy/alchemy/object';
import { camelCase, truncate, template } from '@tecnomancy/alchemy/string';
import { and, or, not, isString } from '@tecnomancy/alchemy/predicates';