import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:jj_mkvmaker/ui/floating_actions.dart';

/// W 공용 위젯 약속 (FloatingActions): 좁거나 낮은 화면은 내용 안 단추 줄 (떠 있지 않음), 넓으면 오른쪽 아래에 떠 있고
/// 내용 아래를 단추 높이만큼 비움 · 첫 단추가 맨 아래. 위젯 하나에 대해 한 번만 둔다 (설계 7-2)
void main() {
  Widget fab(String n) => FloatingActionButton.extended(heroTag: null, onPressed: () {}, icon: const Icon(Icons.drive_file_move_outline), label: Text(n));

  Future<(Widget?, double)> show(WidgetTester t, {required bool inline, Size size = const Size(960, 600), double scale = 1}) async {
    t.view.physicalSize = size;
    t.view.devicePixelRatio = 1;
    addTearDown(t.view.reset);
    Widget? gotRow;
    var gotGap = -1.0;
    await t.pumpWidget(MaterialApp(
      home: MediaQuery(
        data: MediaQueryData(size: size, textScaler: TextScaler.linear(scale)),
        child: Scaffold(
          body: FloatingActions(
            inline: inline,
            buttons: [fab('이동'), fab('NAS')],
            content: (row, gap) {
              gotRow = row;
              gotGap = gap;
              return ListView(children: [const SizedBox(height: 100, child: Text('내용')), ?row]);
            },
          ),
        ),
      ),
    ));
    return (gotRow, gotGap);
  }

  testWidgets('넓으면 떠 있음: 내용 아래를 단추 높이만큼 비우고, 첫 단추가 맨 아래', (t) async {
    final (row, gap) = await show(t, inline: false);
    expect(row, isNull);
    expect(gap, 16 + 2 * floatingActionRow + 16);
    expect(t.getRect(find.text('이동')).top, greaterThan(t.getRect(find.text('NAS')).top), reason: '첫 단추가 아래');
    expect(t.getRect(find.text('이동')).bottom, greaterThan(600 - 60), reason: '오른쪽 아래');
  });

  testWidgets('좁거나 낮으면 내용 안 단추 줄 (떠 있지 않음) · 아래 여백 24', (t) async {
    final (row, gap) = await show(t, inline: true, size: const Size(412, 900));
    expect(row, isNotNull);
    expect(gap, 24);
    expect(find.byType(Positioned), findsNothing);
    expect(t.takeException(), isNull);
  });

  testWidgets('floatingInline: 좁음 · 높이 500 미만 · 글자 배율로 나눈 높이 (F7 - 960×600 · 1.6 배)', (t) async {
    late BuildContext ctx;
    for (final (size, scale, compact, want) in [
      (const Size(960, 800), 1.0, false, false),
      (const Size(960, 800), 1.0, true, true),
      (const Size(900, 412), 1.0, false, true),
      (const Size(960, 600), 1.6, false, true),
    ]) {
      await t.pumpWidget(MediaQuery(
          data: MediaQueryData(size: size, textScaler: TextScaler.linear(scale)),
          child: Builder(builder: (c) {
            ctx = c;
            return const SizedBox();
          })));
      expect(floatingInline(ctx, compact: compact), want, reason: '$size × $scale compact=$compact');
    }
  });
}