import 'package:flutter/material.dart';

import '/components/custom_title_bar.dart';
import '/components/flash_message.dart';
import '/database/models/conversations.dart';
import '/exceptions/update_data_exception.dart';
import '/services/conversations_service.dart';

class ConversationPermissions extends StatefulWidget {
  const ConversationPermissions({
    Key? key,
    required this.conversation,
  }) : super(key: key);

  final Conversation conversation;

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

class _ConversationPermissionsState extends State<ConversationPermissions> {
  Map<String, Map<String, String>> perms = {
    'admin_add_members': {
      'title': 'Add Members',
      'desc': 'Restrict adding members to admins',
    },
    'admin_edit_info': {
      'title': 'Edit Info',
      'desc': 'Restrict editing the conversation information to admins',
    },
    'admin_send_messages': {
      'title': 'Send Messages',
      'desc': 'Restrict sending messages to admins',
    },
  };

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: CustomTitleBar(
        title: const Text(
          'Permissions',
          style: TextStyle(
            fontSize: 28,
            fontWeight: FontWeight.bold
          )
        ),
        beforeBack: () async {
          ConversationsService.updateConversation(widget.conversation)
            .catchError((error) {
              String message = error.toString();
              if (error.runtimeType != UpdateDataException) {
                message = 'An error occured, please try again later';
              }

              showMessage(message, context);
            });
        },
        showBack: true,
        backgroundColor: Colors.transparent,
      ),
      body: Padding(
        padding: const EdgeInsets.only(top: 30),
        child: _list(),
      ),
    );
  }

  Widget _list() {
    return ListView.builder(
      itemCount: perms.length,
      shrinkWrap: true,
      itemBuilder: (context, i) {
        String key = perms.keys.elementAt(i);

        return GestureDetector(
          behavior: HitTestBehavior.opaque,
          onTap: () {
            _setValue(key);
          },

          child: Padding(
            padding: const EdgeInsets.only(left: 30, right: 20, top: 8, bottom: 8),
            child: Row(
              children: [
                _getValue(key) ?
                  const Icon(Icons.check) :
                  const SizedBox(width: 24),
                const SizedBox(width: 16),
                Expanded(
                  child: Align(
                    alignment: Alignment.centerLeft,
                    child: Column(
                      crossAxisAlignment: CrossAxisAlignment.start,
                      children: [
                        Text(
                          perms[key]!['title'] ?? '',
                          textAlign: TextAlign.left,
                          style: const TextStyle(
                            fontSize: 20,
                            fontWeight: FontWeight.normal,
                          ),
                        ),
                        const SizedBox(height: 5),
                        Text(
                          perms[key]!['desc'] ?? '',
                          textAlign: TextAlign.left,
                          style: const TextStyle(
                            fontSize: 14,
                            fontWeight: FontWeight.w200,
                          ),
                        ),
                      ]
                    )
                  )
                )
              ],
            )
          )
        );
      }
    );
  }

  bool _getValue(String key) {
    switch (key) {
      case 'admin_add_members': {
        return widget.conversation.adminAddMembers;
      }
      case 'admin_edit_info': {
        return widget.conversation.adminEditInfo;
      }
      case 'admin_send_messages': {
        return widget.conversation.adminSendMessages;
      }
      default: {
        return false;
      }
    }
  }

  void _setValue(String key) {
    switch (key) {
      case 'admin_add_members': {
        setState(() {
          widget.conversation.adminAddMembers = !widget.conversation.adminAddMembers;
        });
        break;
      }
      case 'admin_edit_info': {
        setState(() {
          widget.conversation.adminEditInfo = !widget.conversation.adminEditInfo;
        });
        break;
      }
      case 'admin_send_messages': {
        setState(() {
          widget.conversation.adminSendMessages = !widget.conversation.adminSendMessages;
        });
        break;
      }
    }
  }
}