// Integration test for the persistent download queue (download_jobs table)
// Run with: npm run test:downloads

import fs from 'node:fs';
import path from 'node:path';
import os from 'node:os';

// Create isolated temp DB file
const tmpDir = fs.mkdtempSync(path.join(os.tmpdir(), 'newtube-dl-test-'));
const dbPath = path.join(tmpDir, 'test.db');
process.env.NEWTUBE_DB_FILE = dbPath;

// Dynamically import DB after setting env
const dbMod = await import('../db.mjs');
const {
  insertUser,
  cryptoRandomUUID,
  insertDownloadJob,
  getDownloadJob,
  listDownloadJobs,
  updateDownloadJob,
  deleteDownloadJob,
  resetActiveDownloadJobs,
  countActiveDownloadJobs,
  sumCompletedDownloadBytes,
} = dbMod;

function expect(cond, msg) {
  if (!cond) {
    throw new Error(`Assertion failed: ${msg}`);
  }
}

function logOk(msg) {
  console.log(`✓ ${msg}`);
}

const userA = cryptoRandomUUID();
const userB = cryptoRandomUUID();
insertUser({ id: userA, username: 'dl-a', email: null, passwordHash: 'x' });
insertUser({ id: userB, username: 'dl-b', email: null, passwordHash: 'y' });

// 1) Insert + read back
const job1 = insertDownloadJob({ id: 'job-1', userId: userA, provider: 'peertube', videoId: 'v123', title: 'Video One', formatId: '18', audioOnly: false, url: 'https://example.com/v123' });
expect(job1 && job1.id === 'job-1', 'insertDownloadJob returns the job');
expect(job1.state === 'queued', 'new job starts queued');
expect(job1.progress === 0, 'new job progress is 0');
logOk('insertDownloadJob + getDownloadJob round-trip');

// 2) Ownership: userB cannot see userA's job via list
const forB = listDownloadJobs({ userId: userB, limit: 50 });
expect(forB.length === 0, 'userB list is empty');
const forA = listDownloadJobs({ userId: userA, limit: 50 });
expect(forA.length === 1 && forA[0].id === 'job-1', 'userA sees own job');
logOk('Jobs are scoped per user');

// 3) Update: progress monotonic + completion
updateDownloadJob('job-1', { state: 'running', progress: 42 });
let j = getDownloadJob('job-1');
expect(j.state === 'running' && j.progress === 42, 'update to running/42 works');
// progress must never go backwards
updateDownloadJob('job-1', { state: 'running', progress: 10 });
j = getDownloadJob('job-1');
expect(j.progress === 42, 'progress never decreases');
// complete it
updateDownloadJob('job-1', { state: 'completed', progress: 100, fileName: 'Video One.mp4', fileExt: 'mp4', fileSize: 1048576, filePath: '/tmp/x/Video One.mp4', completedAt: Date.now() });
j = getDownloadJob('job-1');
expect(j.state === 'completed' && j.fileSize === 1048576 && j.completedAt, 'completion stores file info');
logOk('updateDownloadJob progress monotonic + completion fields');

// 4) Active count only counts queued/running/merging
const job2 = insertDownloadJob({ id: 'job-2', userId: userA, provider: 'odysee', videoId: 'v456', title: 'Video Two', formatId: null, audioOnly: true, url: 'https://example.com/v456' });
expect(countActiveDownloadJobs(userA) === 1, 'completed job not counted as active');
updateDownloadJob('job-2', { state: 'merging' });
expect(countActiveDownloadJobs(userA) === 1, 'merging job counted as active');
logOk('countActiveDownloadJobs counts only active states');

// 5) Quota sums completed sizes within window
const total = sumCompletedDownloadBytes(userA, Date.now() - 1000);
expect(total === 1048576, `sumCompletedDownloadBytes sums completed files (got ${total})`);
const empty = sumCompletedDownloadBytes(userB, 0);
expect(empty === 0, 'userB has zero bytes used');
logOk('sumCompletedDownloadBytes quota accounting');

// 6) resetActiveDownloadJobs marks running jobs as interrupted
updateDownloadJob('job-2', { state: 'running' });
resetActiveDownloadJobs();
j = getDownloadJob('job-2');
expect(j.state === 'interrupted', 'running job becomes interrupted after restart');
expect(getDownloadJob('job-1').state === 'completed', 'completed job untouched by reset');
logOk('resetActiveDownloadJobs marks active jobs interrupted');

// 7) Delete scoped to owner
const removedB = deleteDownloadJob({ userId: userB, id: 'job-1' });
expect(removedB === false, 'userB cannot delete userA job');
const removedA = deleteDownloadJob({ userId: userA, id: 'job-1' });
expect(removedA === true, 'owner can delete own job');
expect(getDownloadJob('job-1') == null, 'deleted job is gone');
logOk('deleteDownloadJob enforces ownership');

// 8) State filter on list
const interruptedOnly = listDownloadJobs({ userId: userA, limit: 50, state: 'interrupted' });
expect(interruptedOnly.length === 1 && interruptedOnly[0].id === 'job-2', 'list by state filter works');
logOk('listDownloadJobs state filter');

console.log('\nAll download jobs tests passed.');