import 'package:comunic/enums/post_target.dart';
import 'package:comunic/helpers/posts_helper.dart';
import 'package:comunic/models/advanced_user_info.dart';
import 'package:comunic/models/displayed_content.dart';
import 'package:comunic/models/friend_status.dart';
import 'package:comunic/ui/routes/main_route/main_route.dart';
import 'package:comunic/ui/widgets/FrienshipStatusWidget.dart';
import 'package:comunic/ui/widgets/account_image_widget.dart';
import 'package:comunic/ui/widgets/like_widget.dart';
import 'package:comunic/ui/widgets/post_create_form_widget.dart';
import 'package:comunic/ui/widgets/posts_list_widget.dart';
import 'package:comunic/ui/widgets/text_widget.dart';
import 'package:comunic/utils/account_utils.dart';
import 'package:comunic/utils/conversations_utils.dart';
import 'package:comunic/utils/date_utils.dart';
import 'package:comunic/utils/intl_utils.dart';
import 'package:flutter/material.dart';
import 'package:flutter/rendering.dart';

/// Tablet mode of user page
///
/// @author Pierre HUBERT

class UserPageTablet extends StatefulWidget {
  final AdvancedUserInfo userInfo;
  final FriendStatus friendshipStatus;
  final void Function() onNeedRefresh;

  const UserPageTablet({
    Key key,
    @required this.userInfo,
    @required this.friendshipStatus,
    @required this.onNeedRefresh,
  })  : assert(userInfo != null),
        assert(onNeedRefresh != null),
        super(key: key);

  @override
  _UserPageTabletState createState() => _UserPageTabletState();
}

class _UserPageTabletState extends State<UserPageTablet> {
  AdvancedUserInfo get _userInfo => widget.userInfo;

  bool get _isCurrentUser => _userInfo.id == userID();

  @override
  Widget build(BuildContext context) => Padding(
        padding: const EdgeInsets.all(8.0),
        child: Flex(
          direction: Axis.horizontal,
          crossAxisAlignment: CrossAxisAlignment.start,
          children: <Widget>[
            _buildLeftColumn(),
            Expanded(child: _buildRightColumn())
          ],
        ),
      );

  Widget _buildLeftColumn() => SingleChildScrollView(
        child: Column(
          children: <Widget>[
            _buildMainCard(),
            _buildActionsCard(),
            _buildAboutCard(),
          ],
        ),
      );

  Widget _buildRightColumn() => PostsListWidget(
        disablePullToRefresh: true,
        topWidgets: [
          _userInfo.canPostTexts
              ? PostCreateFormWidget(
                  postTarget: PostTarget.USER_PAGE,
                  targetID: _userInfo.id,
                  onCreated: widget.onNeedRefresh,
                )
              : Container()
        ],
        getPostsList: () => PostsHelper().getUserPosts(_userInfo.id),
        getOlder: (from) =>
            PostsHelper().getUserPosts(_userInfo.id, from: from),
        showPostsTarget: false,
      );

  /// Main user information card
  Widget _buildMainCard() => _LeftPaneContainer(
        child: Column(
          children: <Widget>[
            Center(child: AccountImageWidget(user: _userInfo, width: 75)),
            _MainCardSpacer(),
            Text(
              _userInfo.displayName,
              textAlign: TextAlign.center,
              style: TextStyle(fontSize: 20),
            ),
            _MainCardSpacer(),
            Container(
                child: _userInfo.hasVirtualDirectory
                    ? Text("@${_userInfo.virtualDirectory}")
                    : null),
            _MainCardSpacer(visible: _userInfo.hasVirtualDirectory),
            LikeWidget(likeElement: _userInfo),
            _MainCardSpacer(visible: !_isCurrentUser),
            _isCurrentUser
                ? Container()
                : FriendshipStatusWidget(
                    status: widget.friendshipStatus,
                    onFriendshipUpdated: widget.onNeedRefresh,
                  )
          ],
        ),
      );

  /// Actions card
  Widget _buildActionsCard() => _LeftPaneContainer(
        child: ButtonTheme(
          minWidth: 30,
          padding: EdgeInsets.all(0),
          child: Row(
            children: <Widget>[
              // Friends list of the user
              _userInfo.isFriendsListPublic
                  ? Expanded(
                      child: OutlinedButton.icon(
                        onPressed: () => MainController.of(context)
                            .openUserFriendsList(_userInfo.id),
                        icon: Icon(Icons.group),
                        label: Text("${_userInfo.numberFriends}"),
                      ),
                    )
                  : Container(),

              // Private messages
              !_isCurrentUser
                  ? Expanded(
                      child: OutlineButton(
                      onPressed: () =>
                          openPrivateConversation(context, _userInfo.id),
                      child: Icon(Icons.message),
                    ))
                  : Container(),
            ],
          ),
        ),
      );

  /// Build user information card
  Widget _buildAboutCard() => _LeftPaneContainer(
        child: Column(
          children: <Widget>[
            // User membership
            _AboutUserEntry(
                icon: Icons.access_time,
                title: tr("Membership"),
                value: tr("Member for %t%", args: {
                  "t": diffTimeFromNowToStr(_userInfo.accountCreationTime)
                })),

            // User public note
            _AboutUserEntry(
              icon: Icons.note,
              title: tr("Note"),
              value: _userInfo.publicNote,
              visible: _userInfo.hasPublicNote,
              parsed: true,
            ),

            // User website
            _AboutUserEntry(
              icon: Icons.link,
              title: tr("Website"),
              value: _userInfo.personalWebsite,
              visible: _userInfo.hasPersonalWebsite,
              parsed: true,
            ),
          ],
        ),
      );
}

class _LeftPaneContainer extends StatelessWidget {
  final Widget child;

  const _LeftPaneContainer({Key key, this.child}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return ConstrainedBox(
      constraints: BoxConstraints(maxWidth: 200),
      child: Card(
        child: Padding(
          padding: const EdgeInsets.all(8.0),
          child: child,
        ),
      ),
    );
  }
}

class _MainCardSpacer extends StatelessWidget {
  final bool visible;

  const _MainCardSpacer({this.visible = true, Key key})
      : assert(visible != null),
        super(key: key);

  @override
  Widget build(BuildContext context) =>
      visible ? SizedBox(height: 10) : Container();
}

class _AboutUserEntry extends StatelessWidget {
  final IconData icon;
  final String title;
  final String value;
  final bool visible;
  final bool parsed;

  const _AboutUserEntry({
    Key key,
    @required this.icon,
    @required this.title,
    @required this.value,
    this.visible = true,
    this.parsed = false,
  })  : assert(icon != null),
        assert(title != null),
        assert(visible != null),
        super(key: key);

  @override
  Widget build(BuildContext context) {
    if (!visible) return Container();

    return ListTile(
      title: RichText(
        text: TextSpan(
          children: [
            WidgetSpan(
              child: Icon(icon, size: 15),
              alignment: PlaceholderAlignment.middle,
            ),
            TextSpan(text: " $title")
          ],
        ),
      ),
      subtitle: parsed
          ? TextWidget(
              content: DisplayedString(value),
              style: TextStyle(),
            )
          : Text(value),
      dense: true,
    );
  }
}