// URL normalization: the non-ASCII and malformed-percent cases that made
// v7 routing crash or mismatch. See lib/router.js header for the rules.

import { test } from 'node:test'
import assert from 'node:assert'

import html from '@uhhm/buuh-html'
import choo from '@uhhm/buuh'

function view (state) {
  return html`<div></div>`
}

test('a literal % in the path does not crash routing', () => {
  const app = choo()
  let seen
  app.route('/deals/:label', (state) => {
    seen = state
    return view(state)
  })
  app.toString('/deals/50%off')
  assert.strictEqual(seen.params.label, '50%off', 'raw segment kept when not decodable')
  assert.strictEqual(seen.href, '/deals/50%off', 'href kept raw when not decodable')
})

test('percent-encoded UTF-8 params decode exactly once', () => {
  const app = choo()
  let seen
  app.route('/user/:name', (state) => {
    seen = state
    return view(state)
  })
  app.toString('/user/%F0%9F%9A%82')
  assert.strictEqual(seen.params.name, '🚂', 'param decoded')
  assert.strictEqual(seen.href, '/user/🚂', 'href decoded for humans')
})

test('double-encoded input is not double-decoded', () => {
  const app = choo()
  let seen
  app.route('/user/:name', (state) => {
    seen = state
    return view(state)
  })
  // %2540 is '%40' encoded once; v7 double-decoded it all the way to '@'
  app.toString('/user/%2540')
  assert.strictEqual(seen.params.name, '%40', 'decoded exactly once')
})

test('non-ASCII literal routes match their encoded locations', () => {
  const app = choo()
  let calls = 0
  app.route('/café', (state) => {
    calls++
    return view(state)
  })
  app.toString('/caf%C3%A9')
  assert.strictEqual(calls, 1, 'encoded location matched unencoded route')
})

test('NFD input matches an NFC route definition', () => {
  const app = choo()
  let calls = 0
  app.route('/café', (state) => { // composed é
    calls++
    return view(state)
  })
  app.toString('/café') // decomposed e + combining acute
  assert.strictEqual(calls, 1, 'unicode-normalized before matching')
})

test('unencoded non-ASCII locations route fine', () => {
  const app = choo()
  let seen
  app.route('/user/:name', (state) => {
    seen = state
    return view(state)
  })
  app.toString('/user/日本語')
  assert.strictEqual(seen.params.name, '日本語')
})

test('wildcards decode per segment', () => {
  const app = choo()
  let seen
  app.route('/files/*', (state) => {
    seen = state
    return view(state)
  })
  app.toString('/files/caf%C3%A9/na%C3%AFve.txt')
  assert.strictEqual(seen.params.wildcard, 'café/naïve.txt')
})

test('hash routing survives multiple hashes', () => {
  const app = choo({ hash: true })
  let calls = 0
  app.route('/docs/api/intro', (state) => {
    calls++
    return view(state)
  })
  app.toString('/docs#api#intro')
  assert.strictEqual(calls, 1, 'every hash became a slash')
})

test('query strings decode + and percent-encoding via URLSearchParams', () => {
  const app = choo()
  let seen
  app.route('/', (state) => {
    seen = state
    return view(state)
  })
  app.toString('/?q=caf%C3%A9+au+lait&tags=a&tags=b')
  assert.deepStrictEqual(seen.query, { q: 'café au lait', tags: ['a', 'b'] })
})