import "package:flutter/widgets.dart";
import "package:flutter_test/flutter_test.dart";
import "package:garage_ui/garage_ui.dart";

import "support/test_scheme.dart";

// The actions band. Before this existed a Save button had to go in `rows`,
// where it read as one more property that happened to be a button - no
// separator, no tone, and lined up against the property split like a value.

Widget _host(Widget child, {Density density = const Density()}) =>
    Directionality(
      textDirection: TextDirection.ltr,
      child: GarageTheme(
        data: ThemeData(colorScheme: testScheme, density: density),
        child: Center(child: SizedBox(width: 420, child: child)),
      ),
    );

Widget _section({List<Widget> actions = const [], bool collapsed = false}) =>
    PropertiesSection(
      title: "Profile",
      scheme: testScheme,
      collapsed: collapsed,
      onToggle: () {},
      actions: actions,
      rows: [
        PropertyRow(
          label: "Username",
          scheme: testScheme,
          child: const SizedBox(),
        ),
      ],
    );

Color? _bandColour(WidgetTester tester) {
  final containers = find
      .ancestor(
        of: find.text("Save"),
        matching: find.byType(Container),
      )
      .evaluate()
      .map((e) => e.widget as Container)
      .where((c) => c.color != null);
  return containers.isEmpty ? null : containers.first.color;
}

void main() {
  testWidgets("no actions means no band and no separator", (tester) async {
    await tester.pumpWidget(_host(_section()));
    expect(find.byType(Divider), findsNothing);
  });

  testWidgets("actions get a separator and the muted band", (tester) async {
    await tester.pumpWidget(
      _host(
        _section(
          actions: [
            Button(
              style: const ButtonStyle.primary(),
              onPressed: () {},
              child: const Text("Save"),
            ),
          ],
        ),
      ),
    );

    expect(find.byType(Divider), findsOneWidget);
    // toned OFF the section, not the same fill
    expect(_bandColour(tester), testScheme.muted);
    expect(_bandColour(tester),
        isNot(testScheme.card));
  });

  testWidgets("the band spans the section, not just its buttons", (
    tester,
  ) async {
    await tester.pumpWidget(
      _host(
        _section(
          actions: [
            Button(
              style: const ButtonStyle.primary(),
              onPressed: () {},
              child: const Text("Save"),
            ),
          ],
        ),
      ),
    );

    const density = Density();
    final content = tester.getRect(
      find
          .ancestor(of: find.text("Save"), matching: find.byType(Row))
          .first,
    );
    final divider = tester.getRect(find.byType(Divider));

    // the BAND spans the section edge to edge - its content is inset by the
    // same buttonPaddingX a row uses, so the buttons line up with the controls
    // above them rather than sitting on the section's edge.
    expect(content.width, divider.width - density.buttonPaddingX * 2);
    // and the whole thing sits under the rows
    expect(
      content.top,
      greaterThan(tester.getRect(find.text("Username")).bottom),
    );
  });

  testWidgets("actions collapse with the rows", (tester) async {
    await tester.pumpWidget(
      _host(
        _section(
          collapsed: true,
          actions: [
            Button(
              style: const ButtonStyle.primary(),
              onPressed: () {},
              child: const Text("Save"),
            ),
          ],
        ),
      ),
    );

    expect(find.text("Save"), findsNothing);
    expect(find.byType(Divider), findsNothing);
  });
}