part of 'command_executor.dart';

extension _CommandExecutorToast on CommandExecutor {
  Future<_CommandResult> _toast(
    RuntimeCommand command,
    _CommandContext context,
    RuntimeCommandHandle? handle,
  ) {
    final text = _toastText(command);
    final duration = _duration(command, defaultValue: 1.8);
    final scope = _scopeFor(command, context, defaultTarget: false);
    final scopeEpoch = _scopeEpochFor(scope, context);
    final task = _registerTask(scope, handle);
    final toastId = 'runtime_toast_${++_toastSerial}';
    final toastTextId = '${toastId}_text';

    _renderTree.apply(
      NodeDiff(
        creates: _toastNodes(id: toastId, textId: toastTextId, text: text),
      ),
    );
    task.addCancelCallback(() => _renderTree.removeById(toastId));

    _schedule(duration, task, () {
      if ((handle?.isCancelled ?? false) || !_scopeIsAlive(scope)) {
        _renderTree.removeById(toastId);
        task.cancel();
        return;
      }
      _renderTree.removeById(toastId);
      _emitCommandCompletion(
        command,
        context.copyWith(scope: scope, scopeEpoch: scopeEpoch),
      );
      task.complete(_CommandResult.completed);
    });

    return task.future;
  }

  List<RuntimeNode> _toastNodes({
    required String id,
    required String textId,
    required String text,
  }) {
    const width = 360.0;
    const minHeight = 38.0;
    final lineCount = text.split('\n').length;
    final height = (minHeight + (lineCount - 1) * 16).clamp(38.0, 92.0);
    final x = ((_overlaySize.x - width) / 2).clamp(12.0, _overlaySize.x);
    final y = (_overlaySize.y - height - 58).clamp(12.0, _overlaySize.y);

    return [
      RuntimeNode(
        id: id,
        type: RuntimeNodeType.panel,
        x: x,
        y: y,
        width: width,
        height: height,
        color: const Color(0xee020617),
        radius: 12,
        layer: 10000,
      ),
      RuntimeNode(
        id: textId,
        type: RuntimeNodeType.text,
        parent: id,
        text: text,
        x: 14,
        y: 0,
        width: width - 28,
        height: height,
        color: const Color(0xfff8fafc),
        fontSize: 13,
        textAlign: RuntimeTextAlignValue.center,
        layer: 10001,
      ),
    ];
  }

  String _toastText(RuntimeCommand command) {
    final text = _optionalString(command.payload['text'], 'toast.text');
    final message = _optionalString(
      command.payload['message'],
      'toast.message',
    );
    if (text != null) {
      return text;
    }
    if (message != null) {
      return message;
    }
    throw const FormatException('toast.text or toast.message is required');
  }
}