import 'dart:developer';

import 'package:fluffychat/pangea/matrix_event_wrappers/pangea_message_event.dart';
import 'package:fluffychat/pangea/models/analytics/analytics_model.dart';
import 'package:fluffychat/pangea/models/pangea_token_model.dart';
import 'package:fluffychat/pangea/utils/error_handler.dart';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:matrix/matrix.dart';

import '../../enum/construct_type_enum.dart';

class ConstructAnalyticsModel extends AnalyticsModel {
  List<OneConstructUse> uses;

  ConstructAnalyticsModel({
    this.uses = const [],
  });

  static const _usesKey = "uses";

  factory ConstructAnalyticsModel.fromJson(Map<String, dynamic> json) {
    final List<OneConstructUse> uses = [];
    if (json[_usesKey] is List) {
      // This is the new format
      uses.addAll(
        json[_usesKey]
            .map((use) => OneConstructUse.fromJson(use))
            .cast<OneConstructUse>()
            .toList(),
      );
    } else {
      // This is the old format. No data on production should be
      // structured this way, but it's useful for testing.
      try {
        final useValues = (json[_usesKey] as Map<String, dynamic>).values;
        for (final useValue in useValues) {
          final lemma = useValue['lemma'];
          final lemmaUses = useValue[_usesKey];
          for (final useData in lemmaUses) {
            final use = OneConstructUse(
              useType: ConstructUseType.ga,
              chatId: useData["chatId"],
              timeStamp: DateTime.parse(useData["timeStamp"]),
              lemma: lemma,
              form: useData["form"],
              msgId: useData["msgId"],
              constructType: ConstructType.grammar,
            );
            uses.add(use);
          }
        }
      } catch (err, s) {
        debugPrint("Error parsing ConstructAnalyticsModel");
        ErrorHandler.logError(
          e: err,
          s: s,
          m: "Error parsing ConstructAnalyticsModel",
        );
        debugger(when: kDebugMode);
      }
    }
    return ConstructAnalyticsModel(
      uses: uses,
    );
  }

  toJson() {
    return {
      _usesKey: uses.map((use) => use.toJson()).toList(),
    };
  }

  static List<OneConstructUse> formatConstructsContent(
    List<PangeaMessageEvent> recentMsgs,
  ) {
    final List<PangeaMessageEvent> filtered = List.from(recentMsgs);
    final List<OneConstructUse> uses = [];

    for (final msg in filtered) {
      if (msg.originalSent?.choreo == null) continue;
      uses.addAll(
        msg.originalSent!.choreo!.toGrammarConstructUse(
          msg.eventId,
          msg.room.id,
          msg.originServerTs,
        ),
      );

      final List<PangeaToken>? tokens = msg.originalSent?.tokens;
      if (tokens == null) continue;
      uses.addAll(
        msg.originalSent!.choreo!.toVocabUse(
          tokens,
          msg.room.id,
          msg.eventId,
          msg.originServerTs,
        ),
      );
    }

    return uses;
  }
}

enum ConstructUseType {
  /// produced in chat by user, igc was run, and we've judged it to be a correct use
  wa,

  /// produced in chat by user, igc was run, and we've judged it to be a incorrect use
  /// Note: if the IGC match is ignored, this is not counted as an incorrect use
  ga,

  /// produced in chat by user and igc was not run
  unk,

  /// selected correctly in IT flow
  corIt,

  /// encountered as IT distractor and correctly ignored it
  ignIt,

  /// encountered as it distractor and selected it
  incIt,

  /// encountered in igc match and ignored match
  ignIGC,

  /// selected correctly in IGC flow
  corIGC,

  /// encountered as distractor in IGC flow and selected it
  incIGC,
}

extension on ConstructUseType {
  String get string {
    switch (this) {
      case ConstructUseType.ga:
        return 'ga';
      case ConstructUseType.wa:
        return 'wa';
      case ConstructUseType.corIt:
        return 'corIt';
      case ConstructUseType.incIt:
        return 'incIt';
      case ConstructUseType.ignIt:
        return 'ignIt';
      case ConstructUseType.ignIGC:
        return 'ignIGC';
      case ConstructUseType.corIGC:
        return 'corIGC';
      case ConstructUseType.incIGC:
        return 'incIGC';
      case ConstructUseType.unk:
        return 'unk';
    }
  }

  IconData get icon {
    switch (this) {
      case ConstructUseType.ga:
        return Icons.check;
      case ConstructUseType.wa:
        return Icons.thumb_up_sharp;
      case ConstructUseType.corIt:
        return Icons.check;
      case ConstructUseType.incIt:
        return Icons.close;
      case ConstructUseType.ignIt:
        return Icons.close;
      case ConstructUseType.ignIGC:
        return Icons.close;
      case ConstructUseType.corIGC:
        return Icons.check;
      case ConstructUseType.incIGC:
        return Icons.close;
      case ConstructUseType.unk:
        return Icons.help;
    }
  }
}

class OneConstructUse {
  String? lemma;
  ConstructType? constructType;
  String? form;
  ConstructUseType useType;
  String chatId;
  String? msgId;
  DateTime timeStamp;
  String? id;

  OneConstructUse({
    required this.useType,
    required this.chatId,
    required this.timeStamp,
    required this.lemma,
    required this.form,
    required this.msgId,
    required this.constructType,
    this.id,
  });

  factory OneConstructUse.fromJson(Map<String, dynamic> json) {
    return OneConstructUse(
      useType: ConstructUseType.values
          .firstWhere((e) => e.string == json['useType']),
      chatId: json['chatId'],
      timeStamp: DateTime.parse(json['timeStamp']),
      lemma: json['lemma'],
      form: json['form'],
      msgId: json['msgId'],
      constructType: json['constructType'] != null
          ? ConstructTypeUtil.fromString(json['constructType'])
          : null,
      id: json['id'],
    );
  }

  Map<String, dynamic> toJson([bool condensed = false]) {
    final Map<String, String?> data = {
      'useType': useType.string,
      'chatId': chatId,
      'timeStamp': timeStamp.toIso8601String(),
      'form': form,
      'msgId': msgId,
    };
    if (!condensed && lemma != null) data['lemma'] = lemma!;
    if (!condensed && constructType != null) {
      data['constructType'] = constructType!.string;
    }
    if (id != null) data['id'] = id;

    return data;
  }

  Room? getRoom(Client client) {
    return client.getRoomById(chatId);
  }

  Future<Event?> getEvent(Client client) async {
    final Room? room = getRoom(client);
    if (room == null || msgId == null) return null;
    return room.getEventById(msgId!);
  }
}

class ConstructUses {
  final List<OneConstructUse> uses;
  final ConstructType constructType;
  final String lemma;

  ConstructUses({
    required this.uses,
    required this.constructType,
    required this.lemma,
  });
}