// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

library function_ref_element;

import 'dart:async';

import 'package:web/web.dart';

import 'package:observatory/src/elements/class_ref.dart';
import 'package:observatory/src/elements/helpers/custom_element.dart';
import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
import 'package:observatory/src/elements/helpers/uris.dart';

import 'package:observatory/models.dart' as M
    show
        IsolateRef,
        FunctionRef,
        isSyntheticFunction,
        ClassRef,
        ObjectRef,
        getFunctionFullName;

class FunctionRefElement extends CustomElement implements Renderable {
  late RenderingScheduler<FunctionRefElement> _r;

  Stream<RenderedEvent<FunctionRefElement>> get onRendered => _r.onRendered;

  M.IsolateRef? _isolate;
  late M.FunctionRef _function;
  late bool _qualified;

  M.IsolateRef? get isolate => _isolate;
  M.FunctionRef get function => _function;
  bool get qualified => _qualified;

  factory FunctionRefElement(M.IsolateRef? isolate, M.FunctionRef function,
      {bool qualified = true, RenderingQueue? queue}) {
    FunctionRefElement e = new FunctionRefElement.created();
    e._r = new RenderingScheduler<FunctionRefElement>(e, queue: queue);
    e._isolate = isolate;
    e._function = function;
    e._qualified = qualified;
    return e;
  }

  FunctionRefElement.created() : super.created('function-ref');

  @override
  void attached() {
    super.attached();
    _r.enable();
  }

  @override
  void detached() {
    super.detached();
    removeChildren();
    title = '';
    _r.disable(notify: true);
  }

  void render() {
    var content = <HTMLElement>[
      new HTMLAnchorElement()
        ..href = (M.isSyntheticFunction(_function.kind) || (_isolate == null))
            ? ''
            : Uris.inspect(_isolate!, object: _function)
        ..text = _function.name ?? ''
    ];
    if (qualified) {
      M.ObjectRef? owner = _function.dartOwner;
      while (owner is M.FunctionRef) {
        content.addAll([
          new HTMLSpanElement()..textContent = '.',
          new HTMLAnchorElement()
            ..href = (M.isSyntheticFunction(owner.kind) || (_isolate == null))
                ? ''
                : Uris.inspect(_isolate!, object: owner)
            ..text = owner.name!
        ]);
        owner = owner.dartOwner;
      }
      if (owner is M.ClassRef) {
        content.addAll([
          new HTMLSpanElement()..textContent = '.',
          new ClassRefElement(_isolate!, owner, queue: _r.queue).element
        ]);
      }
    }
    children = content.reversed.toList(growable: false);
    title = M.getFunctionFullName(_function);
  }
}