// ignore_for_file: depend_on_referenced_packages

import 'package:flutter/material.dart';

import 'package:collection/collection.dart';
import 'package:flutter_svg/flutter_svg.dart';
import 'package:go_router/go_router.dart';
import 'package:matrix/matrix.dart';

import 'package:fluffychat/config/themes.dart';
import 'package:fluffychat/l10n/l10n.dart';
import 'package:fluffychat/pangea/activity_suggestions/activity_suggestion_card.dart';
import 'package:fluffychat/pangea/common/widgets/error_indicator.dart';
import 'package:fluffychat/pangea/common/widgets/url_image_widget.dart';
import 'package:fluffychat/pangea/course_creation/course_info_chip_widget.dart';
import 'package:fluffychat/pangea/course_plans/course_plan_builder.dart';
import 'package:fluffychat/pangea/course_plans/course_plan_room_extension.dart';
import 'package:fluffychat/pangea/course_settings/pin_clipper.dart';
import 'package:fluffychat/pangea/course_settings/topic_participant_list.dart';

class CourseSettings extends StatelessWidget {
  final Room room;
  final CoursePlanController controller;
  const CourseSettings(
    this.controller, {
    super.key,
    required this.room,
  });

  @override
  Widget build(BuildContext context) {
    if (controller.loading) {
      return const Center(child: CircularProgressIndicator());
    }

    if (controller.error != null) {
      return Center(
        child: ErrorIndicator(message: L10n.of(context).failedToLoadCourseInfo),
      );
    }

    if (controller.course == null) {
      return Center(child: Text(L10n.of(context).noCourseFound));
    }

    final theme = Theme.of(context);
    final isColumnMode = FluffyThemes.isColumnMode(context);
    final double titleFontSize = isColumnMode ? 24.0 : 12.0;
    final double descFontSize = isColumnMode ? 12.0 : 8.0;
    final double iconSize = isColumnMode ? 16.0 : 12.0;

    final course = controller.course!;
    final currentTopicIndex = room.currentTopicIndex(
      room.client.userID!,
      course,
    );

    return FutureBuilder(
      future: room.topicsToUsers(course),
      builder: (context, snapshot) {
        final topicsToUsers = snapshot.data ?? {};
        return Column(
          spacing: isColumnMode ? 40.0 : 36.0,
          mainAxisSize: MainAxisSize.min,
          children: course.loadedTopics.mapIndexed((index, topic) {
            final unlocked = index <= currentTopicIndex;
            final usersInTopic = topicsToUsers[topic.uuid] ?? [];
            return AbsorbPointer(
              absorbing: !unlocked,
              child: Opacity(
                opacity: unlocked ? 1.0 : 0.5,
                child: Column(
                  spacing: 12.0,
                  mainAxisSize: MainAxisSize.min,
                  children: [
                    LayoutBuilder(
                      builder: (context, constraints) {
                        return Row(
                          spacing: 8.0,
                          mainAxisAlignment: MainAxisAlignment.spaceBetween,
                          crossAxisAlignment: CrossAxisAlignment.start,
                          children: [
                            Flexible(
                              child: Row(
                                spacing: 4.0,
                                mainAxisSize: MainAxisSize.min,
                                children: [
                                  Stack(
                                    children: [
                                      ClipPath(
                                        clipper: PinClipper(),
                                        child: ImageByUrl(
                                          imageUrl: topic.imageUrl,
                                          width: 54.0,
                                          replacement: Container(
                                            width: 54.0,
                                            height: 54.0,
                                            decoration: BoxDecoration(
                                              color:
                                                  theme.colorScheme.secondary,
                                            ),
                                          ),
                                        ),
                                      ),
                                      if (!unlocked)
                                        const Positioned(
                                          bottom: 0,
                                          right: 0,
                                          child: Icon(Icons.lock, size: 24.0),
                                        ),
                                    ],
                                  ),
                                  Flexible(
                                    child: Column(
                                      mainAxisSize: MainAxisSize.min,
                                      crossAxisAlignment:
                                          CrossAxisAlignment.start,
                                      children: [
                                        Text(
                                          topic.title,
                                          maxLines: 1,
                                          overflow: TextOverflow.ellipsis,
                                          style: TextStyle(
                                            fontSize: titleFontSize,
                                          ),
                                        ),
                                        if (topic.location != null)
                                          CourseInfoChip(
                                            icon: Icons.location_on,
                                            text: topic.location!,
                                            fontSize: descFontSize,
                                            iconSize: iconSize,
                                          ),
                                        if (constraints.maxWidth < 700.0)
                                          Padding(
                                            padding: const EdgeInsetsGeometry
                                                .symmetric(
                                              vertical: 4.0,
                                            ),
                                            child: TopicParticipantList(
                                              room: room,
                                              users: usersInTopic,
                                              avatarSize:
                                                  isColumnMode ? 50.0 : 25.0,
                                              overlap:
                                                  isColumnMode ? 20.0 : 8.0,
                                            ),
                                          ),
                                      ],
                                    ),
                                  ),
                                ],
                              ),
                            ),
                            if (constraints.maxWidth >= 700.0)
                              TopicParticipantList(
                                room: room,
                                users: usersInTopic,
                                avatarSize: isColumnMode ? 50.0 : 25.0,
                                overlap: isColumnMode ? 20.0 : 8.0,
                              ),
                          ],
                        );
                      },
                    ),
                    if (unlocked)
                      SizedBox(
                        height: isColumnMode ? 290.0 : 210.0,
                        child: ListView.builder(
                          scrollDirection: Axis.horizontal,
                          itemCount: topic.loadedActivities.length,
                          itemBuilder: (context, index) {
                            final activityId =
                                topic.loadedActivities[index].activityId;

                            final complete = room.hasCompletedActivity(
                              room.client.userID!,
                              activityId,
                            );

                            final activityRoomId = room.activeActivityRoomId(
                              activityId,
                            );

                            final activity = topic.loadedActivities[index];

                            return Padding(
                              padding: const EdgeInsets.only(right: 24.0),
                              child: MouseRegion(
                                cursor: SystemMouseCursors.click,
                                child: GestureDetector(
                                  onTap: () => context.go(
                                    activityRoomId != null
                                        ? "/rooms/spaces/${room.id}/$activityRoomId"
                                        : "/rooms/spaces/${room.id}/activity/$activityId",
                                  ),
                                  child: Stack(
                                    children: [
                                      ActivitySuggestionCard(
                                        activity: activity,
                                        width: isColumnMode ? 160.0 : 120.0,
                                        height: isColumnMode ? 280.0 : 200.0,
                                        fontSize: isColumnMode ? 20.0 : 12.0,
                                        fontSizeSmall:
                                            isColumnMode ? 12.0 : 8.0,
                                        iconSize: isColumnMode ? 12.0 : 8.0,
                                        openSessions:
                                            room.numOpenSessions(activityId),
                                      ),
                                      if (complete)
                                        Container(
                                          width: isColumnMode ? 160.0 : 120.0,
                                          height: isColumnMode ? 280.0 : 200.0,
                                          decoration: BoxDecoration(
                                            borderRadius:
                                                BorderRadius.circular(12.0),
                                            color: theme.colorScheme.surface
                                                .withAlpha(180),
                                          ),
                                          child: Center(
                                            child: SvgPicture.asset(
                                              "assets/pangea/check.svg",
                                              width: 48.0,
                                              height: 48.0,
                                            ),
                                          ),
                                        ),
                                    ],
                                  ),
                                ),
                              ),
                            );
                          },
                        ),
                      ),
                  ],
                ),
              ),
            );
          }).toList(),
        );
      },
    );
  }
}