import 'dart:io';

import 'package:flutter_test/flutter_test.dart';
import 'package:fuel_tax_tracker/services/db_schema.dart';
import 'package:path/path.dart' as p;
import 'package:sqflite_common_ffi/sqflite_ffi.dart';

/// Regression coverage for a real bug: the "needs upload" query used to
/// match on `receipt_image_path IS NOT NULL` alone, which would have kept
/// re-uploading the same photo as a duplicate Drive file on every sync
/// once a "keep photos on this phone" option let an already-uploaded row
/// keep its local path. See [pendingReceiptUploadWhereClause].
void main() {
  late Directory tempDir;
  late Database db;

  setUpAll(() {
    sqfliteFfiInit();
    databaseFactory = databaseFactoryFfi;
  });

  setUp(() async {
    tempDir = await Directory.systemTemp.createTemp('pending_receipt_test_');
    db = await databaseFactory.openDatabase(p.join(tempDir.path, 'test.db'));
    await db.execute(createFuelEntriesTableSql);
  });

  tearDown(() async {
    await db.close();
    await tempDir.delete(recursive: true);
  });

  Future<void> insertEntry(
    String id, {
    String? receiptImagePath,
    String? receiptDriveFileId,
    int dirty = 1,
    int? deletedAt,
  }) {
    return db.insert('fuel_entries', {
      'id': id,
      'vehicle_id': 'v1',
      'date': 0,
      'gallons': 10.0,
      'price_per_gallon': 3.5,
      'total_cost': 35.0,
      'receipt_image_path': receiptImagePath,
      'receipt_drive_file_id': receiptDriveFileId,
      'updated_at': 0,
      'deleted_at': deletedAt,
      'dirty': dirty,
    });
  }

  test('matches a row with a local photo not yet uploaded', () async {
    await insertEntry('needs-upload', receiptImagePath: '/local/a.jpg');

    final rows = await db.query('fuel_entries', where: pendingReceiptUploadWhereClause);

    expect(rows.map((r) => r['id']), ['needs-upload']);
  });

  test('excludes a row already uploaded, even if the local copy was kept', () async {
    await insertEntry(
      'kept-after-upload',
      receiptImagePath: '/local/a.jpg',
      receiptDriveFileId: 'drive-file-1',
    );

    final rows = await db.query('fuel_entries', where: pendingReceiptUploadWhereClause);

    expect(rows, isEmpty);
  });

  test('excludes a row with no local photo at all', () async {
    await insertEntry('no-receipt');

    final rows = await db.query('fuel_entries', where: pendingReceiptUploadWhereClause);

    expect(rows, isEmpty);
  });

  test('excludes a soft-deleted row even if it has a pending local photo', () async {
    await insertEntry('deleted', receiptImagePath: '/local/a.jpg', deletedAt: 123);

    final rows = await db.query('fuel_entries', where: pendingReceiptUploadWhereClause);

    expect(rows, isEmpty);
  });

  test('excludes a clean (already-synced) row', () async {
    await insertEntry('clean', receiptImagePath: '/local/a.jpg', dirty: 0);

    final rows = await db.query('fuel_entries', where: pendingReceiptUploadWhereClause);

    expect(rows, isEmpty);
  });
}