const test = require('node:test');
const assert = require('node:assert/strict');
const { buildConfig, resolveSyncDateRange, validateConfig } = require('../src/config');

test('uses safe Tiny request pacing and DD/MM/YYYY request date format by default', () => {
  const config = buildConfig({
    TINY_API_TOKEN: 'test-token',
    DRY_RUN: 'true',
    SYNC_START_DATE: '2026-07-02'
  });

  validateConfig(config);
  assert.equal(config.tinyRequestDelayMs, 5000);
  assert.equal(config.tinyDateFormat, 'DD/MM/YYYY');
});

test('validates env date format before syncing', () => {
  assert.throws(
    () => buildConfig({
      TINY_API_TOKEN: 'test-token',
      DRY_RUN: 'true',
      SYNC_START_DATE: '02/07/2026'
    }),
    /SYNC_START_DATE must use YYYY-MM-DD format/
  );
});

test('accepts ISO Tiny request date format override', () => {
  const config = buildConfig({
    TINY_API_TOKEN: 'test-token',
    DRY_RUN: 'true',
    SYNC_START_DATE: '2026-07-02',
    TINY_DATE_FORMAT: 'YYYY-MM-DD'
  });

  validateConfig(config);
  assert.equal(config.tinyDateFormat, 'YYYY-MM-DD');
});

test('requires DATABASE_URL only for real DB writes', () => {
  assert.doesNotThrow(() => validateConfig(buildConfig({
    TINY_API_TOKEN: 'test-token',
    DRY_RUN: 'true',
    SYNC_START_DATE: '2026-07-02'
  })));

  assert.throws(
    () => validateConfig(buildConfig({
      TINY_API_TOKEN: 'test-token',
      DRY_RUN: 'false',
      SYNC_START_DATE: '2026-07-02'
    })),
    /DATABASE_URL is required unless DRY_RUN=true/
  );
});

test('backfill mode syncs through today when SYNC_END_DATE is empty', () => {
  const config = buildConfig({
    TINY_API_TOKEN: 'test-token',
    DRY_RUN: 'true',
    SYNC_MODE: 'backfill',
    SYNC_START_DATE: '2026-06-01',
    SYNC_TIME_ZONE: 'UTC'
  });

  validateConfig(config);
  assert.deepEqual(resolveSyncDateRange(config, new Date('2026-07-02T12:00:00Z')), {
    mode: 'backfill',
    startDate: '2026-06-01',
    endDate: '2026-07-02',
    source: 'backfill through today'
  });
});

test('recent mode defaults to today plus yesterday', () => {
  const config = buildConfig({
    TINY_API_TOKEN: 'test-token',
    DRY_RUN: 'true',
    SYNC_MODE: 'recent',
    RECENT_SYNC_DAYS: '2',
    SYNC_TIME_ZONE: 'UTC'
  });

  validateConfig(config);
  assert.deepEqual(resolveSyncDateRange(config, new Date('2026-07-02T12:00:00Z')), {
    mode: 'recent',
    startDate: '2026-07-01',
    endDate: '2026-07-02',
    source: 'recent 2 day window'
  });
});