import {test} from 'node:test';
import assert from 'node:assert/strict';
import {readPdfPages} from '../src/services/pdfDocumentReader.js';
const page=(text)=>({getTextContent:async()=>({items:[{str:text,hasEOL:true}]}),cleanup(){}});
test('PDF reader preserves the final requirement beyond former 40 page limit',async()=>{
 const doc={numPages:45,getPage:async n=>page(n===45 ? 'FINAL MANDATORY REQUIREMENT' : `Page ${n}`)};
 const result=await readPdfPages(doc);
 assert.equal(result.usedPages,45);assert.equal(result.complete,true);
 assert.ok(result.text.endsWith('FINAL MANDATORY REQUIREMENT'));
 const partial=await readPdfPages(doc,{maxPages:2});
 assert.equal(partial.complete,false);assert.equal(partial.pageCount,45);
});
test('mixed text and scanned pages use OCR only where needed and preserve order',async()=>{
 const pages=[page('Official requirement '.repeat(10)),page(''),page('Final clause '.repeat(15))];
 let calls=0;
 const result=await readPdfPages({numPages:3,getPage:async n=>pages[n-1]},{ocrPage:async()=>{calls++;return 'SCANNED REQUIREMENT';}});
 assert.equal(calls,1);assert.deepEqual(result.pages.map(p=>p.method),['text','ocr','text']);
 assert.match(result.text,/Official requirement[\s\S]*SCANNED REQUIREMENT[\s\S]*Final clause/);
});
test('OCR failure never returns apparently complete extracted text',async()=>{
 await assert.rejects(readPdfPages({numPages:1,getPage:async()=>page('')},{ocrPage:async()=>{throw Error('worker failed');}}),/1. sayfada OCR tamamlanamadı/);
});

test('actual 45-page PDF retains final-page text through pdfjs extraction',async()=>{
 const {jsPDF}=await import('jspdf');
 const {getDocument}=await import('pdfjs-dist/legacy/build/pdf.mjs');
 const pdf=new jsPDF();
 for(let n=1;n<=45;n++) {
  if(n>1) pdf.addPage();
  pdf.text(n===45 ? 'FINAL OFFICIAL SOURCE REQUIREMENT' : `Synthetic QA page ${n}`,15,20);
 }
 const task=getDocument({data:new Uint8Array(pdf.output('arraybuffer')),useSystemFonts:true});
 const doc=await task.promise;
 try {
  const result=await readPdfPages(doc);
  assert.equal(result.pageCount,45);assert.equal(result.usedPages,45);
  assert.ok(result.text.endsWith('FINAL OFFICIAL SOURCE REQUIREMENT'));
 } finally { await task.destroy(); }
});