// 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_view_element;

import 'dart:async';
import 'dart:html';
import 'package:observatory/models.dart' as M;
import 'package:observatory/src/elements/class_ref.dart';
import 'package:observatory/src/elements/code_ref.dart';
import 'package:observatory/src/elements/curly_block.dart';
import 'package:observatory/src/elements/field_ref.dart';
import 'package:observatory/src/elements/instance_ref.dart';
import 'package:observatory/src/elements/helpers/any_ref.dart';
import 'package:observatory/src/elements/helpers/nav_bar.dart';
import 'package:observatory/src/elements/helpers/nav_menu.dart';
import 'package:observatory/src/elements/helpers/rendering_scheduler.dart';
import 'package:observatory/src/elements/helpers/tag.dart';
import 'package:observatory/src/elements/nav/class_menu.dart';
import 'package:observatory/src/elements/nav/isolate_menu.dart';
import 'package:observatory/src/elements/nav/library_menu.dart';
import 'package:observatory/src/elements/nav/notify.dart';
import 'package:observatory/src/elements/nav/refresh.dart';
import 'package:observatory/src/elements/nav/top_menu.dart';
import 'package:observatory/src/elements/nav/vm_menu.dart';
import 'package:observatory/src/elements/object_common.dart';
import 'package:observatory/src/elements/source_inset.dart';
import 'package:observatory/src/elements/source_link.dart';
import 'package:observatory/src/elements/view_footer.dart';

class FunctionViewElement extends CustomElement implements Renderable {
  static const tag =
      const Tag<FunctionViewElement>('function-view', dependencies: const [
    ClassRefElement.tag,
    CodeRefElement.tag,
    CurlyBlockElement.tag,
    FieldRefElement.tag,
    InstanceRefElement.tag,
    NavClassMenuElement.tag,
    NavLibraryMenuElement.tag,
    NavTopMenuElement.tag,
    NavVMMenuElement.tag,
    NavIsolateMenuElement.tag,
    NavRefreshElement.tag,
    NavNotifyElement.tag,
    ObjectCommonElement.tag,
    SourceLinkElement.tag,
    SourceInsetElement.tag,
    ViewFooterElement.tag
  ]);

  RenderingScheduler<FunctionViewElement> _r;

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

  M.VM _vm;
  M.IsolateRef _isolate;
  M.EventRepository _events;
  M.NotificationRepository _notifications;
  M.ServiceFunction _function;
  M.LibraryRef _library;
  M.FunctionRepository _functions;
  M.ClassRepository _classes;
  M.RetainedSizeRepository _retainedSizes;
  M.ReachableSizeRepository _reachableSizes;
  M.InboundReferencesRepository _references;
  M.RetainingPathRepository _retainingPaths;
  M.ScriptRepository _scripts;
  M.ObjectRepository _objects;

  M.VMRef get vm => _vm;
  M.IsolateRef get isolate => _isolate;
  M.NotificationRepository get notifications => _notifications;
  M.ServiceFunction get function => _function;

  factory FunctionViewElement(
      M.VM vm,
      M.IsolateRef isolate,
      M.ServiceFunction function,
      M.EventRepository events,
      M.NotificationRepository notifications,
      M.FunctionRepository functions,
      M.ClassRepository classes,
      M.RetainedSizeRepository retainedSizes,
      M.ReachableSizeRepository reachableSizes,
      M.InboundReferencesRepository references,
      M.RetainingPathRepository retainingPaths,
      M.ScriptRepository scripts,
      M.ObjectRepository objects,
      {RenderingQueue queue}) {
    assert(vm != null);
    assert(isolate != null);
    assert(events != null);
    assert(notifications != null);
    assert(function != null);
    assert(functions != null);
    assert(classes != null);
    assert(retainedSizes != null);
    assert(reachableSizes != null);
    assert(references != null);
    assert(retainingPaths != null);
    assert(scripts != null);
    assert(objects != null);
    FunctionViewElement e = new FunctionViewElement.created();
    e._r = new RenderingScheduler<FunctionViewElement>(e, queue: queue);
    e._vm = vm;
    e._isolate = isolate;
    e._events = events;
    e._notifications = notifications;
    e._function = function;
    e._functions = functions;
    e._classes = classes;
    e._retainedSizes = retainedSizes;
    e._reachableSizes = reachableSizes;
    e._references = references;
    e._retainingPaths = retainingPaths;
    e._scripts = scripts;
    e._objects = objects;
    if (function.dartOwner is M.LibraryRef) {
      e._library = function.dartOwner;
    }
    return e;
  }

  FunctionViewElement.created() : super.created(tag);

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

  @override
  detached() {
    super.detached();
    _r.disable(notify: true);
    children = <Element>[];
  }

  void render() {
    children = <Element>[
      navBar(_createMenu()),
      new DivElement()
        ..classes = ['content-centered-big']
        ..children = <Element>[
          new HeadingElement.h2()..text = 'Function ${_function.name}',
          new HRElement(),
          new ObjectCommonElement(_isolate, _function, _retainedSizes,
                  _reachableSizes, _references, _retainingPaths, _objects,
                  queue: _r.queue)
              .element,
          new BRElement(),
          new DivElement()
            ..classes = ['memberList']
            ..children = _createMembers(),
          new HRElement(),
          new DivElement()
            ..children = _function.location == null
                ? const []
                : [
                    new SourceInsetElement(_isolate, _function.location,
                            _scripts, _objects, _events,
                            queue: _r.queue)
                        .element
                  ],
          new ViewFooterElement(queue: _r.queue).element
        ]
    ];
  }

  List<Element> _createMenu() {
    final menu = <Element>[
      new NavTopMenuElement(queue: _r.queue).element,
      new NavVMMenuElement(_vm, _events, queue: _r.queue).element,
      new NavIsolateMenuElement(_isolate, _events, queue: _r.queue).element
    ];
    if (_library != null) {
      menu.add(new NavLibraryMenuElement(_isolate, _library, queue: _r.queue)
          .element);
    } else if (_function.dartOwner is M.ClassRef) {
      menu.add(new NavClassMenuElement(_isolate, _function.dartOwner,
              queue: _r.queue)
          .element);
    }
    menu.addAll(<Element>[
      navMenu(_function.name),
      (new NavRefreshElement(queue: _r.queue)
            ..onRefresh.listen((e) {
              e.element.disabled = true;
              _refresh();
            }))
          .element,
      new NavNotifyElement(_notifications, queue: _r.queue).element
    ]);
    return menu;
  }

  List<Element> _createMembers() {
    final members = <Element>[
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'kind',
          new DivElement()
            ..classes = ['memberName']
            ..children = <Element>[
              new SpanElement()
                ..text = '${_function.isStatic ? "static " : ""}'
                    '${_function.isConst ? "const " : ""}'
                    '${_functionKindToString(_function.kind)}'
            ]
        ],
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'owner',
          new DivElement()
            ..classes = ['memberName']
            ..children = <Element>[
              _function.dartOwner == null
                  ? (new SpanElement()..text = '...')
                  : anyRef(_isolate, _function.dartOwner, _objects,
                      queue: _r.queue)
            ]
        ]
    ];
    if (_function.field != null) {
      members.add(new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'script',
          new DivElement()
            ..classes = ['memberName']
            ..children = <Element>[
              new FieldRefElement(_isolate, _function.field, _objects,
                      queue: _r.queue)
                  .element
            ]
        ]);
    }
    members.add(new DivElement()
      ..classes = ['memberItem']
      ..children = <Element>[
        new DivElement()
          ..classes = ['memberName']
          ..text = 'script',
        new DivElement()
          ..classes = ['memberName']
          ..children = <Element>[
            new SourceLinkElement(_isolate, _function.location, _scripts,
                    queue: _r.queue)
                .element
          ]
      ]);
    if (_function.code != null) {
      members.add(new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'current code',
          new DivElement()
            ..classes = ['memberName']
            ..children = <Element>[
              new CodeRefElement(_isolate, _function.code, queue: _r.queue)
                  .element
            ]
        ]);
    }
    if (_function.unoptimizedCode != null) {
      members.add(new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'unoptimized code',
          new DivElement()
            ..classes = ['memberName']
            ..children = <Element>[
              new CodeRefElement(_isolate, _function.unoptimizedCode,
                      queue: _r.queue)
                  .element,
              new SpanElement()
                ..title = 'This count is used to determine when a function '
                    'will be optimized.  It is a combination of call '
                    'counts and other factors.'
                ..text = ' (usage count: ${function.usageCounter})'
            ]
        ]);
    }
    if (_function.bytecode != null) {
      members.add(new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'bytecode',
          new DivElement()
            ..classes = ['memberName']
            ..children = <Element>[
              new CodeRefElement(_isolate, _function.bytecode, queue: _r.queue)
                  .element,
            ]
        ]);
    }
    members.add(new DivElement()
      ..classes = ['memberItem']
      ..text = ' ');

    if (_function.icDataArray != null) {
      members.add(new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'ic data array',
          new DivElement()
            ..classes = ['memberName']
            ..children = <Element>[
              new InstanceRefElement(_isolate, _function.icDataArray, _objects,
                      queue: _r.queue)
                  .element
            ]
        ]);
    }

    members.addAll([
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'deoptimizations',
          new DivElement()
            ..classes = ['memberName']
            ..text = '${_function.deoptimizations}'
        ],
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'optimizable',
          new DivElement()
            ..classes = ['memberName']
            ..text = _function.isOptimizable ? 'yes' : 'no'
        ],
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'inlinable',
          new DivElement()
            ..classes = ['memberName']
            ..text = _function.isInlinable ? 'yes' : 'no'
        ],
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'intrinsic',
          new DivElement()
            ..classes = ['memberName']
            ..text = _function.hasIntrinsic ? 'yes' : 'no'
        ],
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'recognized',
          new DivElement()
            ..classes = ['memberName']
            ..text = _function.isRecognized ? 'yes' : 'no'
        ],
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'native',
          new DivElement()
            ..classes = ['memberName']
            ..text = _function.isNative ? 'yes' : 'no'
        ],
      new DivElement()
        ..classes = ['memberItem']
        ..children = <Element>[
          new DivElement()
            ..classes = ['memberName']
            ..text = 'vm name',
          new DivElement()
            ..classes = ['memberName']
            ..text = _function.vmName
        ]
    ]);
    return members;
  }

  Future _refresh() async {
    _function = await _functions.get(_isolate, _function.id);
    if (_function.dartOwner is M.LibraryRef) {
      _library = _function.dartOwner;
    } else if (_function.dartOwner is M.ClassRef) {
      _library = (await _classes.get(_isolate, _function.dartOwner.id)).library;
    }
    _r.dirty();
  }

  static String _functionKindToString(M.FunctionKind kind) {
    switch (kind) {
      case M.FunctionKind.regular:
        return 'regular';
      case M.FunctionKind.closure:
        return 'closure';
      case M.FunctionKind.implicitClosure:
        return 'implicit closure';
      case M.FunctionKind.getter:
        return 'getter';
      case M.FunctionKind.setter:
        return 'setter';
      case M.FunctionKind.constructor:
        return 'constructor';
      case M.FunctionKind.implicitGetter:
        return 'implicit getter';
      case M.FunctionKind.implicitSetter:
        return 'implicit setter';
      case M.FunctionKind.implicitStaticGetter:
        return 'implicit static getter';
      case M.FunctionKind.fieldInitializer:
        return 'field initializer';
      case M.FunctionKind.irregexpFunction:
        return 'irregexp function';
      case M.FunctionKind.methodExtractor:
        return 'method extractor';
      case M.FunctionKind.noSuchMethodDispatcher:
        return 'noSuchMethod dispatcher';
      case M.FunctionKind.invokeFieldDispatcher:
        return 'invokeField dispatcher';
      case M.FunctionKind.collected:
        return 'collected';
      case M.FunctionKind.native:
        return 'native';
      case M.FunctionKind.ffiTrampoline:
        return 'ffi trampoline';
      case M.FunctionKind.stub:
        return 'stub';
      case M.FunctionKind.tag:
        return 'tag';
      case M.FunctionKind.signatureFunction:
        return 'signature function';
      case M.FunctionKind.dynamicInvocationForwarder:
        return 'dynamic invocation forwarder';
    }
    throw new Exception('Unknown Functionkind ($kind)');
  }
}