import test from "node:test"
import assert from "node:assert/strict"

import { ESLint } from "eslint"

const eslint = new ESLint()

test("ensure we validate correctly JavaScript files", async () => {
  const [noErrors] = await eslint.lintFiles(
    "test/fixtures/javascript-no-errors.js",
  )
  const [withErrors] = await eslint.lintFiles(
    "test/fixtures/javascript-with-errors.js",
  )
  assert.strictEqual(noErrors?.errorCount, 0, JSON.stringify(noErrors, null, 2))
  assert.strictEqual(
    withErrors?.errorCount,
    3,
    JSON.stringify(withErrors, null, 2),
  )
})

test("ensure we do not use deprecated rules", async () => {
  const [javascriptLintResult] = await eslint.lintFiles(
    "test/fixtures/javascript-no-errors.js",
  )
  const [typescriptLintResult] = await eslint.lintFiles(
    "test/fixtures/typescript-no-errors.ts",
  )
  assert.strictEqual(
    javascriptLintResult.usedDeprecatedRules.length,
    0,
    JSON.stringify(javascriptLintResult, null, 2),
  )
  assert.strictEqual(
    typescriptLintResult.usedDeprecatedRules.length,
    0,
    JSON.stringify(typescriptLintResult, null, 2),
  )
})

test("ensure we validate correctly TypeScript files", async () => {
  const [noErrors] = await eslint.lintFiles(
    "test/fixtures/typescript-no-errors.ts",
  )
  const [withErrors] = await eslint.lintFiles(
    "test/fixtures/javascript-with-errors.js",
  )
  assert.strictEqual(noErrors?.errorCount, 0, JSON.stringify(noErrors, null, 2))
  assert.strictEqual(
    withErrors?.errorCount,
    3,
    JSON.stringify(withErrors, null, 2),
  )
})

test("ensure we allow top-level await", async () => {
  const [lintResult] = await eslint.lintFiles(
    "test/fixtures/top-level-await.mjs",
  )
  assert.strictEqual(
    lintResult?.errorCount,
    0,
    JSON.stringify(lintResult, null, 2),
  )
})

test("ensure we allow to ignore floating promise with void operator (@typescript-eslint/no-floating-promises)", async () => {
  const [lintResult] = await eslint.lintFiles(
    "test/fixtures/typescript-no-errors-ignore-promise.ts",
  )
  assert.strictEqual(
    lintResult?.errorCount,
    0,
    JSON.stringify(lintResult, null, 2),
  )
})