/// Sidebar panel showing project diagnostics from pql.
library;

import 'dart:async';

import 'package:clide/kernel/kernel.dart';
import 'package:clide/widgets/widgets.dart';
import 'package:flutter/widgets.dart';

import 'problems_controller.dart';

class ProblemsView extends StatefulWidget {
  const ProblemsView({super.key});

  @override
  State<ProblemsView> createState() => _ProblemsViewState();
}

class _ProblemsViewState extends State<ProblemsView> {
  ProblemsController? _controller;

  @override
  void didChangeDependencies() {
    super.didChangeDependencies();
    if (_controller != null) return;
    final kernel = ClideKernel.of(context);
    _controller = ProblemsController(ipc: kernel.ipc);
    unawaited(_controller!.refresh());
  }

  @override
  void dispose() {
    _controller?.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    final c = _controller;
    if (c == null) return const SizedBox.shrink();
    return ListenableBuilder(
      listenable: c,
      builder: (context, _) {
        final tokens = ClideTheme.of(context).surface;
        return Semantics(
          label: 'problems panel',
          container: true,
          explicitChildNodes: true,
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              Padding(
                padding: const EdgeInsets.symmetric(
                    horizontal: 12, vertical: 6),
                child: Row(
                  children: [
                    Expanded(
                      child: ClideText(
                        'Problems (${c.problems.length})',
                        fontSize: clideFontCaption,
                        color: tokens.sidebarForeground,
                      ),
                    ),
                    Semantics(
                      button: true,
                      label: 'refresh problems',
                      child: GestureDetector(
                        onTap: () => unawaited(c.refresh()),
                        child: MouseRegion(
                          cursor: SystemMouseCursors.click,
                          child: ClideText(
                            'Refresh',
                            fontSize: clideFontCaption,
                            color: tokens.sidebarForeground,
                          ),
                        ),
                      ),
                    ),
                  ],
                ),
              ),
              if (c.loading && c.problems.isEmpty)
                const Padding(
                  padding: EdgeInsets.all(12),
                  child: ClideText('Scanning…', muted: true),
                ),
              if (!c.loading && c.problems.isEmpty)
                const Padding(
                  padding: EdgeInsets.all(12),
                  child: ClideText(
                    'No problems found.',
                    muted: true,
                  ),
                ),
              Expanded(
                child: SingleChildScrollView(
                  padding: const EdgeInsets.symmetric(vertical: 4),
                  child: Column(
                    crossAxisAlignment: CrossAxisAlignment.stretch,
                    mainAxisSize: MainAxisSize.min,
                    children: [
                      for (final p in c.problems) _ProblemRow(problem: p),
                    ],
                  ),
                ),
              ),
            ],
          ),
        );
      },
    );
  }
}

class _ProblemRow extends StatelessWidget {
  const _ProblemRow({required this.problem});
  final Problem problem;

  @override
  Widget build(BuildContext context) {
    final tokens = ClideTheme.of(context).surface;
    return Padding(
      padding: const EdgeInsets.symmetric(horizontal: 12, vertical: 4),
      child: Column(
        crossAxisAlignment: CrossAxisAlignment.start,
        mainAxisSize: MainAxisSize.min,
        children: [
          Row(
            children: [
              ClideText(
                problem.source,
                fontSize: clideFontMono,
                color: tokens.statusWarning,
                fontFamily: clideMonoFamily,
              ),
              const SizedBox(width: 6),
              Expanded(
                child: ClideText(
                  problem.message,
                  color: tokens.sidebarForeground,
                  maxLines: 2,
                ),
              ),
            ],
          ),
          if (problem.hint != null)
            Padding(
              padding: const EdgeInsets.only(left: 44, top: 2),
              child: ClideText(
                problem.hint!,
                fontSize: clideFontMono,
                muted: true,
                fontFamily: clideMonoFamily,
              ),
            ),
        ],
      ),
    );
  }
}