import { bench, describe } from 'vitest';
import { STANDARD } from '../helpers/bench-options.js';
import {
  ok,
  err,
  ntOk,
  ntErr,
  TsOk,
  TsErr,
  OxOk,
  OxErr,
  E,
  pipe,
  TmResult,
} from '../helpers/imports.js';

interface User {
  name: string;
  email: string;
  age: number;
}

const validUser: User = { name: 'Alice', email: 'alice@example.com', age: 30 };
const invalidUser: User = { name: '', email: 'alice@example.com', age: 30 };

// ---------------------------------------------------------------------------
// 5-check validation — all pass
// ---------------------------------------------------------------------------

describe('Scenario: 5-check validation pipeline — all pass', () => {
  bench('native-monad', () => {
    ok<User, string>(validUser)
      .flatMap(u => (u.name ? ok(u) : err('name required')))
      .flatMap(u => (u.email.includes('@') ? ok(u) : err('invalid email')))
      .flatMap(u => (u.age >= 18 ? ok(u) : err('must be 18+')))
      .flatMap(u => (u.age <= 120 ? ok(u) : err('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('neverthrow', () => {
    ntOk<User, string>(validUser)
      .andThen(u => (u.name ? ntOk(u) : ntErr('name required')))
      .andThen(u => (u.email.includes('@') ? ntOk(u) : ntErr('invalid email')))
      .andThen(u => (u.age >= 18 ? ntOk(u) : ntErr('must be 18+')))
      .andThen(u => (u.age <= 120 ? ntOk(u) : ntErr('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('ts-results-es', () => {
    TsOk<User, string>(validUser)
      .andThen(u => (u.name ? TsOk(u) : TsErr('name required')))
      .andThen(u => (u.email.includes('@') ? TsOk(u) : TsErr('invalid email')))
      .andThen(u => (u.age >= 18 ? TsOk(u) : TsErr('must be 18+')))
      .andThen(u => (u.age <= 120 ? TsOk(u) : TsErr('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('oxide.ts', () => {
    OxOk<User, string>(validUser)
      .andThen(u => (u.name ? OxOk(u) : OxErr('name required')))
      .andThen(u => (u.email.includes('@') ? OxOk(u) : OxErr('invalid email')))
      .andThen(u => (u.age >= 18 ? OxOk(u) : OxErr('must be 18+')))
      .andThen(u => (u.age <= 120 ? OxOk(u) : OxErr('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('fp-ts', () => {
    pipe(
      E.right<string, User>(validUser),
      E.flatMap(u => (u.name ? E.right(u) : E.left('name required'))),
      E.flatMap(u => (u.email.includes('@') ? E.right(u) : E.left('invalid email'))),
      E.flatMap(u => (u.age >= 18 ? E.right(u) : E.left('must be 18+'))),
      E.flatMap(u => (u.age <= 120 ? E.right(u) : E.left('unrealistic age'))),
      E.map(u => ({ ...u, validated: true })),
    );
  }, STANDARD);

  bench('true-myth', () => {
    TmResult.ok<User, string>(validUser)
      .andThen(u => (u.name ? TmResult.ok(u) : TmResult.err('name required')))
      .andThen(u => (u.email.includes('@') ? TmResult.ok(u) : TmResult.err('invalid email')))
      .andThen(u => (u.age >= 18 ? TmResult.ok(u) : TmResult.err('must be 18+')))
      .andThen(u => (u.age <= 120 ? TmResult.ok(u) : TmResult.err('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);
});

// ---------------------------------------------------------------------------
// 5-check validation — fails at step 1 (early exit)
// ---------------------------------------------------------------------------

describe('Scenario: 5-check validation pipeline — fails at step 1', () => {
  bench('native-monad', () => {
    ok<User, string>(invalidUser)
      .flatMap(u => (u.name ? ok(u) : err('name required')))
      .flatMap(u => (u.email.includes('@') ? ok(u) : err('invalid email')))
      .flatMap(u => (u.age >= 18 ? ok(u) : err('must be 18+')))
      .flatMap(u => (u.age <= 120 ? ok(u) : err('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('neverthrow', () => {
    ntOk<User, string>(invalidUser)
      .andThen(u => (u.name ? ntOk(u) : ntErr('name required')))
      .andThen(u => (u.email.includes('@') ? ntOk(u) : ntErr('invalid email')))
      .andThen(u => (u.age >= 18 ? ntOk(u) : ntErr('must be 18+')))
      .andThen(u => (u.age <= 120 ? ntOk(u) : ntErr('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('ts-results-es', () => {
    TsOk<User, string>(invalidUser)
      .andThen(u => (u.name ? TsOk(u) : TsErr('name required')))
      .andThen(u => (u.email.includes('@') ? TsOk(u) : TsErr('invalid email')))
      .andThen(u => (u.age >= 18 ? TsOk(u) : TsErr('must be 18+')))
      .andThen(u => (u.age <= 120 ? TsOk(u) : TsErr('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('oxide.ts', () => {
    OxOk<User, string>(invalidUser)
      .andThen(u => (u.name ? OxOk(u) : OxErr('name required')))
      .andThen(u => (u.email.includes('@') ? OxOk(u) : OxErr('invalid email')))
      .andThen(u => (u.age >= 18 ? OxOk(u) : OxErr('must be 18+')))
      .andThen(u => (u.age <= 120 ? OxOk(u) : OxErr('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);

  bench('fp-ts', () => {
    pipe(
      E.right<string, User>(invalidUser),
      E.flatMap(u => (u.name ? E.right(u) : E.left('name required'))),
      E.flatMap(u => (u.email.includes('@') ? E.right(u) : E.left('invalid email'))),
      E.flatMap(u => (u.age >= 18 ? E.right(u) : E.left('must be 18+'))),
      E.flatMap(u => (u.age <= 120 ? E.right(u) : E.left('unrealistic age'))),
      E.map(u => ({ ...u, validated: true })),
    );
  }, STANDARD);

  bench('true-myth', () => {
    TmResult.ok<User, string>(invalidUser)
      .andThen(u => (u.name ? TmResult.ok(u) : TmResult.err('name required')))
      .andThen(u => (u.email.includes('@') ? TmResult.ok(u) : TmResult.err('invalid email')))
      .andThen(u => (u.age >= 18 ? TmResult.ok(u) : TmResult.err('must be 18+')))
      .andThen(u => (u.age <= 120 ? TmResult.ok(u) : TmResult.err('unrealistic age')))
      .map(u => ({ ...u, validated: true }));
  }, STANDARD);
});