const { test } = require('node:test');
const assert = require('node:assert');
const { normalizeLogMode, resolveLogFileName, formatDateStamp, formatSessionStamp } = require('../lib/log-mode');

// --- normalizeLogMode ---

test('normalizeLogMode: default for empty/null/undefined is "single"', () => {
  assert.equal(normalizeLogMode(), 'single');
  assert.equal(normalizeLogMode(null), 'single');
  assert.equal(normalizeLogMode({}), 'single');
});

test('normalizeLogMode: explicit logMode wins for all three valid values', () => {
  assert.equal(normalizeLogMode({ logMode: 'single' }), 'single');
  assert.equal(normalizeLogMode({ logMode: 'daily' }), 'daily');
  assert.equal(normalizeLogMode({ logMode: 'session' }), 'session');
});

test('regression: legacy sessionLog:true maps to "daily", NOT "session"', () => {
  // The legacy boolean field was named after a misnomer — it actually toggled
  // per-day logging. Mapping it to "session" would silently flip every existing
  // per-day user onto per-session, which is exactly the bug the migration trap
  // exists to prevent.
  assert.equal(normalizeLogMode({ sessionLog: true }), 'daily');
});

test('normalizeLogMode: sessionLog:false / missing maps to "single"', () => {
  assert.equal(normalizeLogMode({ sessionLog: false }), 'single');
});

test('normalizeLogMode: explicit logMode beats the legacy sessionLog field', () => {
  // Once a user picks a mode in 3.3.35+, the legacy boolean must NOT override.
  assert.equal(normalizeLogMode({ logMode: 'session', sessionLog: true }), 'session');
  assert.equal(normalizeLogMode({ logMode: 'single', sessionLog: true }), 'single');
});

test('normalizeLogMode: invalid logMode strings fall through to single (or legacy if present)', () => {
  assert.equal(normalizeLogMode({ logMode: 'lolnope' }), 'single');
  assert.equal(normalizeLogMode({ logMode: '' }), 'single');
  assert.equal(normalizeLogMode({ logMode: 'lolnope', sessionLog: true }), 'daily');
});

// --- resolveLogFileName ---

test('resolveLogFileName: single mode → bare basename + ext', () => {
  assert.equal(
    resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'single' }),
    'fileuploader.log'
  );
});

test('resolveLogFileName: daily mode → fileuploader-YYYY-MM-DD.log', () => {
  const d = new Date(2026, 4, 28); // May 28, 2026 — month is 0-indexed
  assert.equal(
    resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'daily', date: d }),
    'fileuploader-2026-05-28.log'
  );
});

test('resolveLogFileName: session mode → fileuploader-session-<id>.log', () => {
  assert.equal(
    resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'session', sessionId: '2026-05-28_22-44-52-12345' }),
    'fileuploader-session-2026-05-28_22-44-52-12345.log'
  );
});

test('resolveLogFileName: session mode with missing sessionId falls back to single (never emits malformed name)', () => {
  assert.equal(
    resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'session' }),
    'fileuploader.log'
  );
});

test('resolveLogFileName: unknown mode is treated as single', () => {
  assert.equal(
    resolveLogFileName({ baseName: 'fileuploader', ext: '.log', mode: 'lolnope' }),
    'fileuploader.log'
  );
});

// --- format helpers ---

test('formatDateStamp: zero-pads month and day', () => {
  assert.equal(formatDateStamp(new Date(2026, 0, 3)), '2026-01-03');
  assert.equal(formatDateStamp(new Date(2026, 11, 31)), '2026-12-31');
});

test('formatSessionStamp: produces YYYY-MM-DD_HH-MM-SS-pid', () => {
  const d = new Date(2026, 4, 28, 7, 9, 5);
  assert.equal(formatSessionStamp(d, 12345), '2026-05-28_07-09-05-12345');
});

test('formatSessionStamp: omits the pid suffix when none provided', () => {
  const d = new Date(2026, 4, 28, 22, 44, 52);
  assert.equal(formatSessionStamp(d), '2026-05-28_22-44-52');
});