import test from 'node:test';
import assert from 'node:assert/strict';
import { DEFAULT_SETTINGS } from '../lib/defaults.js';
import { MAX_URL_CHARS } from '../lib/build-url.js';
const { prepareAction } = await import('../lib/prepare-action.js').catch(()=>({}));
const req = (overrides={}) => ({actionId:'ask',source:'Hello',settings:{...DEFAULT_SETTINGS},...overrides});
test('ready actions preserve source and hints, translation asks only when needed', () => {
  assert.equal(typeof prepareAction, 'function');
  assert.equal(prepareAction(req()).url, 'https://chatgpt.com/?q=Hello');
  assert.equal(prepareAction(req({actionId:'translate'})).kind,'language');
  assert.match(new URL(prepareAction(req({actionId:'translate',language:'Spanish'})).url).searchParams.get('q'),/Spanish/);
  assert.equal(prepareAction(req({actionId:'translate',settings:{...DEFAULT_SETTINGS,translationMode:'preferred',translationLanguage:'Spanish'}})).kind,'ready');
  assert.equal(prepareAction(req({source:''})).url,'https://chatgpt.com/');
  assert.equal(prepareAction(req({actionId:'debug',source:''})).kind,'error');
  assert.equal(prepareAction(req({actionId:'bogus'})).kind,'error');
});
test('URLs are validated and preserved whole, never shortened', () => {
  assert.equal(typeof prepareAction, 'function');
  for (const source of ['javascript:alert(1)','about:config','ftp://example.com','https://user:pass@example.com','not a url','https://example.com/?q='+'x'.repeat(9000)]) {
    assert.equal(prepareAction(req({actionId:'ask-link',source})).kind,'error',source.slice(0,40));
  }
  const source='https://example.com/?q=a%20b&x=1#part';
  const out=prepareAction(req({actionId:'review-link',source}));
  assert.equal(out.kind,'ready');
  assert.ok(new URL(out.url).searchParams.get('q').endsWith(source));
});
test('shortened selections end on a whole word and decode cleanly', () => {
  assert.equal(typeof prepareAction, 'function');
  const out=prepareAction(req({source:'lorem ipsum '.repeat(2000)}));
  assert.equal(out.kind,'shortened');
  const words=new URL(out.url).searchParams.get('q').replace('[Selected text shortened]','').trim().split(/\s+/);
  assert.ok(words.length>1);
  for (const word of words) assert.ok(word==='lorem'||word==='ipsum',`cut mid-word: ${word}`);
  const emoji=prepareAction(req({source:'😀 '.repeat(9000)}));
  assert.equal(emoji.kind,'shortened');
  assert.doesNotThrow(()=>decodeURIComponent(new URL(emoji.url).search.slice(1)));
});
test('long selections preserve instructions, repetition and Unicode with explicit consent', () => {
  assert.equal(typeof prepareAction, 'function');
  const settings={...DEFAULT_SETTINGS,promptTemplate:'START {query} AGAIN {query} END',temporaryChat:true,webSearch:true};
  const out=prepareAction(req({source:'😀 word '.repeat(4000),settings}));
  assert.equal(out.kind,'shortened');
  assert.ok(out.url.length<=8000);
  const q=new URL(out.url).searchParams.get('q');
  assert.ok(q.startsWith('START '));assert.ok(q.includes(' END'));assert.ok(q.includes('[Selected text shortened]'));
  assert.equal(q.match(/START (.*?) AGAIN/s)[1],q.match(/AGAIN (.*?) END/s)[1]);
  assert.equal(/[\uD800-\uDBFF](?![\uDC00-\uDFFF])|(?<![\uD800-\uDBFF])[\uDC00-\uDFFF]/u.test(q),false);
  assert.equal(new URL(out.url).searchParams.get('hints'),'search');
  assert.equal(prepareAction(req({settings:{...settings,promptTemplate:'x'.repeat(9000)}})).kind,'error');
  const translated=prepareAction(req({actionId:'translate',language:'Spanish',source:'x'.repeat(20000)}));
  assert.equal(translated.kind,'shortened');assert.match(new URL(translated.url).searchParams.get('q'), /Spanish/);
});
test('huge selections are capped before shortening, with identical output', () => {
  assert.equal(typeof prepareAction, 'function');
  // Select-all on a very large page; shortening this took over a second uncapped.
  const source='😀 word '.repeat(625000);
  const started=performance.now();
  const out=prepareAction(req({source}));
  const elapsed=performance.now()-started;
  assert.equal(out.kind,'shortened');
  assert.ok(elapsed<250,`took ${elapsed.toFixed(0)} ms`);
  const capped=Array.from(source).slice(0,MAX_URL_CHARS).join('');
  assert.deepEqual(prepareAction(req({source:capped})),out);
});
test('a selection too long to send whole always needs consent, even if its start would fit', () => {
  assert.equal(typeof prepareAction, 'function');
  // The first MAX_URL_CHARS code points trim down to "a"; sending just that would drop the rest unasked.
  const out=prepareAction(req({source:'a'+' '.repeat(MAX_URL_CHARS)+'b'}));
  assert.equal(out.kind,'shortened');
  assert.ok(new URL(out.url).searchParams.get('q').includes('[Selected text shortened]'));
});