import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:tatlock_ui/shared/components/data_grid/data_grid_column.dart';
import 'package:tatlock_ui/shared/components/data_grid/data_grid_config.dart';
import 'package:tatlock_ui/shared/components/data_grid/data_grid_state.dart';

import '../../../harness/test_harness.dart';

/// Test data class for DataGrid tests.
class TestItem {
  const TestItem({
    required this.id,
    required this.name,
    required this.value,
    this.isActive = true,
  });

  final String id;
  final String name;
  final int value;
  final bool isActive;
}

void main() {
  final harness = TestHarness();

  setUp(() => harness.setUp());
  tearDown(() => harness.tearDown());

  group('DataGridColumn', () {
    test('creates column with required fields', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Name',
        valueBuilder: (item) => item.name,
      );

      expect(column.id, 'name');
      expect(column.header, 'Name');
      expect(column.sortable, isFalse);
      expect(column.searchable, isFalse);
    });

    test('creates sortable column', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Name',
        valueBuilder: (item) => item.name,
        sortable: true,
      );

      expect(column.sortable, isTrue);
    });

    test('creates searchable column', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Name',
        valueBuilder: (item) => item.name,
        searchable: true,
      );

      expect(column.searchable, isTrue);
    });

    test('valueBuilder extracts correct value', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Name',
        valueBuilder: (item) => item.name,
      );

      final item = TestItem(id: '1', name: 'Test Item', value: 42);
      expect(column.valueBuilder(item), 'Test Item');
    });

    test('supports fixed width', () {
      final column = DataGridColumn<TestItem>(
        id: 'id',
        header: 'ID',
        valueBuilder: (item) => item.id,
        width: const DataGridColumnWidth.fixed(100),
      );

      expect(column.width, isA<GridFixedWidth>());
      expect((column.width as GridFixedWidth).width, 100);
    });

    test('supports flex width', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Name',
        valueBuilder: (item) => item.name,
        width: const DataGridColumnWidth.flex(2),
      );

      expect(column.width, isA<GridFlexWidth>());
      expect((column.width as GridFlexWidth).flex, 2);
    });

    test('default width is flex(1)', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Name',
        valueBuilder: (item) => item.name,
      );

      expect(column.width, isA<GridFlexWidth>());
      expect((column.width as GridFlexWidth).flex, 1);
    });

    test('supports custom alignment', () {
      final column = DataGridColumn<TestItem>(
        id: 'value',
        header: 'Value',
        valueBuilder: (item) => item.value.toString(),
        alignment: DataGridColumnAlignment.end,
      );

      expect(column.alignment, DataGridColumnAlignment.end);
      expect(column.textAlign, TextAlign.end);
      expect(column.crossAxisAlignment, CrossAxisAlignment.end);
    });

    test('effectiveSortField defaults to lowercase header', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Full Name',
        valueBuilder: (item) => item.name,
      );

      expect(column.effectiveSortField, 'full name');
    });

    test('effectiveSortField uses sortField when provided', () {
      final column = DataGridColumn<TestItem>(
        id: 'name',
        header: 'Full Name',
        valueBuilder: (item) => item.name,
        sortField: 'name',
      );

      expect(column.effectiveSortField, 'name');
    });
  });

  group('DataGridConfig', () {
    test('creates config with columns', () {
      final config = DataGridConfig<TestItem>(
        columns: [
          DataGridColumn<TestItem>(
            id: 'id',
            header: 'ID',
            valueBuilder: (item) => item.id,
          ),
          DataGridColumn<TestItem>(
            id: 'name',
            header: 'Name',
            valueBuilder: (item) => item.name,
          ),
        ],
      );

      expect(config.columns.length, 2);
    });

    test('enableSearch defaults to false', () {
      final config = DataGridConfig<TestItem>(
        columns: [],
      );

      expect(config.enableSearch, isFalse);
    });

    test('enables search when specified', () {
      final config = DataGridConfig<TestItem>(
        columns: [
          DataGridColumn<TestItem>(
            id: 'name',
            header: 'Name',
            valueBuilder: (item) => item.name,
            searchable: true,
          ),
        ],
        enableSearch: true,
      );

      expect(config.enableSearch, isTrue);
    });

    test('supports custom search hint', () {
      final config = DataGridConfig<TestItem>(
        columns: [],
        enableSearch: true,
        searchHint: 'Search items...',
      );

      expect(config.searchHint, 'Search items...');
    });

    test('supports row selection mode', () {
      final config = DataGridConfig<TestItem>(
        columns: [],
        rowsSelectable: true,
      );

      expect(config.rowsSelectable, isTrue);
    });

    test('visibleColumns filters hidden columns', () {
      final config = DataGridConfig<TestItem>(
        columns: [
          DataGridColumn<TestItem>(
            id: 'id',
            header: 'ID',
            valueBuilder: (item) => item.id,
            visible: false,
          ),
          DataGridColumn<TestItem>(
            id: 'name',
            header: 'Name',
            valueBuilder: (item) => item.name,
          ),
        ],
      );

      expect(config.visibleColumns.length, 1);
      expect(config.visibleColumns.first.id, 'name');
    });

    test('searchableColumnIndices returns correct indices', () {
      final config = DataGridConfig<TestItem>(
        columns: [
          DataGridColumn<TestItem>(
            id: 'id',
            header: 'ID',
            valueBuilder: (item) => item.id,
          ),
          DataGridColumn<TestItem>(
            id: 'name',
            header: 'Name',
            valueBuilder: (item) => item.name,
            searchable: true,
          ),
          DataGridColumn<TestItem>(
            id: 'value',
            header: 'Value',
            valueBuilder: (item) => item.value.toString(),
            searchable: true,
          ),
        ],
      );

      expect(config.searchableColumnIndices, [1, 2]);
    });
  });

  group('DataGridState', () {
    test('creates initial state with defaults', () {
      const state = DataGridState<TestItem>();

      expect(state.items, isEmpty);
      expect(state.isLoading, isFalse);
      expect(state.selectedIds, isEmpty);
      expect(state.searchQuery, isEmpty);
      expect(state.isInitialLoad, isTrue);
    });

    test('creates loading state', () {
      const state = DataGridState<TestItem>(
        isLoading: true,
      );

      expect(state.isLoading, isTrue);
    });

    test('stores items', () {
      final items = [
        const TestItem(id: '1', name: 'Item 1', value: 10),
        const TestItem(id: '2', name: 'Item 2', value: 20),
      ];

      final state = DataGridState<TestItem>(
        items: items,
        isLoading: false,
      );

      expect(state.items.length, 2);
      expect(state.items[0].name, 'Item 1');
    });

    test('stores selected IDs', () {
      const state = DataGridState<TestItem>(
        selectedIds: {'1', '2', '3'},
      );

      expect(state.selectedIds.length, 3);
      expect(state.selectedIds.contains('1'), isTrue);
    });

    test('stores search query', () {
      const state = DataGridState<TestItem>(
        searchQuery: 'test query',
      );

      expect(state.searchQuery, 'test query');
    });

    test('stores sort column index', () {
      const state = DataGridState<TestItem>(
        sortColumnIndex: 1,
        sortDescending: true,
      );

      expect(state.sortColumnIndex, 1);
      expect(state.sortDescending, isTrue);
    });

    test('stores error', () {
      const state = DataGridState<TestItem>(
        error: 'Something went wrong',
      );

      expect(state.error, 'Something went wrong');
    });

    test('stores pagination info', () {
      const state = DataGridState<TestItem>(
        currentPage: 2,
        totalCount: 100,
      );

      expect(state.currentPage, 2);
      expect(state.totalCount, 100);
    });
  });

  group('DataGridColumnWidth', () {
    test('fixed width creates GridFixedWidth', () {
      const width = DataGridColumnWidth.fixed(150);
      expect(width, isA<GridFixedWidth>());
      expect((width as GridFixedWidth).width, 150);
    });

    test('flex width creates GridFlexWidth', () {
      const width = DataGridColumnWidth.flex(2);
      expect(width, isA<GridFlexWidth>());
      expect((width as GridFlexWidth).flex, 2);
    });

    test('default flex is 1', () {
      const width = DataGridColumnWidth.flex();
      expect((width as GridFlexWidth).flex, 1);
    });

    test('fraction width creates GridFractionWidth', () {
      const width = DataGridColumnWidth.fraction(0.5);
      expect(width, isA<GridFractionWidth>());
      expect((width as GridFractionWidth).fraction, 0.5);
    });
  });

  group('DataGridColumnAlignment', () {
    test('has start alignment', () {
      expect(DataGridColumnAlignment.start, isNotNull);
    });

    test('has center alignment', () {
      expect(DataGridColumnAlignment.center, isNotNull);
    });

    test('has end alignment', () {
      expect(DataGridColumnAlignment.end, isNotNull);
    });
  });

  group('DataGridDataMode', () {
    test('all mode', () {
      const mode = DataGridDataMode.all();
      expect(mode, isA<AllDataMode>());
    });

    test('paginated mode with default page size', () {
      const mode = DataGridDataMode.paginated();
      expect(mode, isA<PaginatedDataMode>());
      expect((mode as PaginatedDataMode).pageSize, 25);
    });

    test('paginated mode with custom page size', () {
      const mode = DataGridDataMode.paginated(pageSize: 50);
      expect((mode as PaginatedDataMode).pageSize, 50);
    });

    test('infinite mode with defaults', () {
      const mode = DataGridDataMode.infinite();
      expect(mode, isA<InfiniteDataMode>());
      expect((mode as InfiniteDataMode).initialLoad, 50);
      expect((mode as InfiniteDataMode).loadMoreThreshold, 10);
    });

    test('infinite mode with custom values', () {
      const mode = DataGridDataMode.infinite(
        initialLoad: 100,
        loadMoreThreshold: 20,
      );
      expect((mode as InfiniteDataMode).initialLoad, 100);
      expect((mode as InfiniteDataMode).loadMoreThreshold, 20);
    });
  });
}