import 'package:flutter/material.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:go_router/go_router.dart';
import 'package:outbag_app/backend/permissions.dart';
import 'package:outbag_app/backend/request.dart';
import 'package:outbag_app/backend/room.dart';
import 'package:outbag_app/backend/user.dart';
import 'dart:math';
import 'package:outbag_app/tools/fetch_wrapper.dart';
import 'package:provider/provider.dart';

class AboutRoomPage extends StatefulWidget {
  final RoomInfo? info;
  final Room? room;

  const AboutRoomPage(this.room, this.info, {super.key});

  @override
  State<StatefulWidget> createState() => _AboutRoomPageState();
}

class _AboutRoomPageState extends State<AboutRoomPage> {
  @override
  Widget build(BuildContext context) {
    final textTheme = Theme.of(context)
    .textTheme
    .apply(displayColor: Theme.of(context).colorScheme.onSurface);

    double width = MediaQuery.of(context).size.width;
    double height = MediaQuery.of(context).size.height;
    double smallest = min(width, height);

    return SingleChildScrollView(
      child: Center(
        child: Column(children: [
            // room meta display
            ...(widget.room != null)
            ? [
              Padding(
                padding: const EdgeInsets.all(14),
                child: Column(
                  children: [
                    SvgPicture.asset(
                      (widget.room?.icon?.img)!,
                      width: smallest * 0.2,
                      height: smallest * 0.2,
                    ),
                    Text(
                      widget.room?.name ?? '',
                      style: textTheme.displayMedium,
                    ),
                    Text(
                      '${widget.room?.id}@${widget.room?.serverTag}',
                      style: textTheme.bodySmall,
                    ),
                    Text(
                      widget.room?.description ?? '',
                      style: textTheme.bodyMedium,
                      textAlign: TextAlign.center,
                    ),
                    Padding(
                      padding: const EdgeInsets.all(8),
                      child: SegmentedButton<int>(
                        showSelectedIcon: true,
                        multiSelectionEnabled: false,
                        emptySelectionAllowed: false,
                        segments: RoomVisibility.list().map((vis) {
                            return ButtonSegment<int>(
                              value: vis.type,
                              label: Text(vis.text),
                              icon: Icon(vis.icon));
                        }).toList(),
                        onSelectionChanged: ((vset) {
                            // check permission
                            // only show confirm dialog when user
                            // is admin, owner or has CHANGE_ADMIN permission
                            if (widget.info == null ||
                              (!(widget.info?.isAdmin ?? false) &&
                                !(widget.info?.isOwner ?? false) &&
                                ((widget.info?.permissions)! &
                                  RoomPermission.ota ==
                                  0))) {
                              // action not permitted
                              // NOTE: no error dialog should be shown
                              // because the action is supposed to be hidden
                              return;
                            }

                            final vis = RoomVisibility(vset.first);
                            showDialog(
                              context: context,
                              builder: (ctx) => AlertDialog(
                                title:
                                const Text('Change room visibility'),
                                content: Text(
                                  'Do you really want to change the room visibility to: ${vis.text}'),
                                actions: [
                                  TextButton(
                                    onPressed: () {
                                      context.pop();
                                    },
                                    child: const Text('Cancel'),
                                  ),
                                  FilledButton(
                                    onPressed: () async {
                                      final scaffMgr =
                                      ScaffoldMessenger.of(context);
                                      final nav = Navigator.of(context);
                                      final user = context.read<User>();

                                      doNetworkRequest(scaffMgr,
                                        req: () => postWithCreadentials(
                                          path: 'setVisibility',
                                          target: user.server,
                                          body: {
                                            'room': widget.room?.id,
                                            'server': (widget
                                              .room?.serverTag)!,
                                            'visibility': vset.first
                                          },
                                          credentials: user),
                                        onOK: (_) {
                                          Room r = widget.room!;
                                          r.visibility = vis;
                                          r.toDisk();
                                        },
                                        after: () {
                                          nav.pop();
                                      });
                                    },
                                    child: const Text('Ok'),
                                  )
                                ],
                            ));
                        }),
                        selected: {(widget.room?.visibility?.type)!},
                        selectedIcon: Icon((widget.room?.visibility?.icon)!),
                    )),
                  ],
                ),
              )
            ]
            : [],

            Padding(
              padding: const EdgeInsets.all(14),
              child: Column(
                children: [
                  // edit room meta button
                  ...(widget.info != null &&
                    ((widget.info?.isAdmin ?? false) ||
                      (widget.info?.isOwner ?? false) ||
                      ((widget.info?.permissions)! &
                        RoomPermission.changeMeta !=
                        0)))
                  ? [
                    ListTile(
                      trailing: const Icon(Icons.chevron_right),
                      title: const Text('Edit Metadata'),
                      subtitle: const Text(
                        'Change the rooms name, description and icon'),
                      onTap: () {
                        // show edit room screen
                        context.goNamed('edit-room', params: {
                            'server': (widget.room?.serverTag)!,
                            'id': (widget.room?.id)!
                        });
                      },
                    ),
                  ]
                  : [],
                  // open members view
                  ListTile(
                    trailing: const Icon(Icons.chevron_right),
                    title: const Text('Members'),
                    subtitle: const Text('Show Member list'),
                    onTap: () {
                      // open member view screen
                      context.goNamed('room-members', params: {
                          'server': (widget.room?.serverTag)!,
                          'id': (widget.room?.id)!
                      });
                    },
                  ),
                  // edit default member permission
                  ...(widget.info != null &&
                    ((widget.info?.isAdmin ?? false) ||
                      (widget.info?.isOwner ?? false) ||
                      ((widget.info?.permissions)! &
                        RoomPermission.changeAdmin !=
                        0)))
                  ? [
                    ListTile(
                      trailing: const Icon(Icons.chevron_right),
                      title: const Text('Edit Permissions'),
                      subtitle: const Text(
                        'Change the default permission-set for all members'),
                      onTap: () {
                        // show checkbox screen
                        context.goNamed('room-permissions', params: {
                            'server': (widget.room?.serverTag)!,
                            'id': (widget.room?.id)!
                        });
                      },
                    ),
                  ]
                  : [],
                  ...(widget.info != null &&
                    ((widget.info?.isAdmin ?? false) ||
                      (widget.info?.isOwner ?? false) ||
                      ((widget.info?.permissions)! & RoomPermission.ota !=
                        0)))
                  ? [
                    ListTile(
                      trailing: const Icon(Icons.chevron_right),
                      title: const Text('OTA'),
                      subtitle: const Text('Add and delete OTAs'),
                      onTap: () {
                        // show manage ota screen
                        context.goNamed('room-ota', params: {
                            'server': (widget.room?.serverTag)!,
                            'id': (widget.room?.id)!
                        });
                      },
                    ),
                    ListTile(
                      trailing: const Icon(Icons.chevron_right),
                      title: const Text('Invites'),
                      subtitle: const Text('Invite people to this room'),
                      onTap: () {
                        // show manage ota screen
                        context.goNamed('room-invite', params: {
                            'server': (widget.room?.serverTag)!,
                            'id': (widget.room?.id)!
                        });
                      },
                    ),
                  ]
                  : [],
                ],
            )),

            ...(widget.info != null)
            ? [
              Padding(
                padding: const EdgeInsets.all(8),
                child: FilledButton.tonal(
                  child: Text(((widget.info?.isOwner)!)
                    ? 'Delete Room'
                    : 'Leave Room'),
                  onPressed: () {
                    // show confirm dialog
                    showDialog(
                      context: context,
                      builder: (ctx) => AlertDialog(
                        title: Text(((widget.info?.isOwner)!)
                          ? 'Delete Room'
                          : 'Leave Room'),
                        content: Text(
                          'Do you really want to ${((widget.info?.isOwner)!) ? "delete" : "leave"} the room?'),
                        actions: [
                          TextButton(
                            onPressed: () {
                              // close popup
                              Navigator.of(ctx).pop();
                            },
                            child: const Text('Cancel'),
                          ),
                          FilledButton(
                            onPressed: () async {
                              // send request
                              final scaffMgr =
                              ScaffoldMessenger.of(ctx);
                              final nav = Navigator.of(ctx);
                              final router = GoRouter.of(context);
                              final user = context.read<User>();

                              doNetworkRequest(scaffMgr,
                                req: () => postWithCreadentials(
                                  path: ((widget.info?.isOwner)!)
                                  ? 'deleteRoom'
                                  : 'leaveRoom',
                                  target: user.server,
                                  body: {
                                    'room': widget.room?.id,
                                    'server':
                                    (widget.room?.serverTag)!,
                                  },
                                  credentials: user),
                                onOK: (_) async {
                                  // try delete room from disk
                                  try {
                                    await widget.room?.removeDisk();
                                  } catch (_) {}

                                  // go back home
                                  router.pushReplacementNamed('home');
                                },
                                after: () {
                                  // close popup
                                  nav.pop();
                              });
                            },
                            child: Text(((widget.info?.isOwner)!)
                              ? 'Delete'
                              : 'Leave'),
                          )
                        ],
                    ));
                  },
              ))
            ]
            : [],
    ])));
  }
}