import 'package:diameter/models/log_meal.dart';
import 'package:diameter/utils/utils.dart';
import 'package:flutter/material.dart';
import 'package:parse_server_sdk_flutter/parse_server_sdk.dart';
import 'package:diameter/models/log_event.dart';

class LogEntry {
  late String? objectId;
  late DateTime time;
  late int? mgPerDl;
  late double? mmolPerL;
  late double? bolusGlucose;
  late int? delayedBolusDuration;
  // TODO: either rename this or all other fields using delayedBolusRate
  late double? delayedBolusRatio;
  late String? notes;
  late Future<List<LogEvent>> events;
  late Future<List<LogEvent>> endedEvents;
  late Future<List<LogMeal>> meals;

  LogEntry(ParseObject object) {
    objectId = object.get<String>('objectId');
    time = object.get<DateTime>('time')!;
    mgPerDl = object.get<num>('mgPerDl') != null
        ? object.get<num>('mgPerDl')!.toInt()
        : null;
    mmolPerL = object.get<num>('mmolPerL') != null
        ? object.get<num>('mmolPerL')!.toDouble()
        : null;
    bolusGlucose = object.get<num>('bolusGlucose') != null
        ? object.get<num>('bolusGlucose')!.toDouble()
        : null;
    delayedBolusDuration = object.get<num>('delayedBolusDuration') != null
        ? object.get<num>('delayedBolusDuration')!.toInt()
        : null;
    delayedBolusRatio = object.get<num>('delayedBolusRatio') != null
        ? object.get<num>('delayedBolusRatio')!.toDouble()
        : null;
    events = LogEvent.fetchAllForLogEntry(this);
    endedEvents = LogEvent.fetchAllEndedByEntry(this);
    meals = LogMeal.fetchAllForLogEntry(this);
    notes = object.get<String>('notes');
  }

  static Future<List<LogEntry>> fetchAllForRange(DateTimeRange range) async {
    QueryBuilder<ParseObject> query =
        QueryBuilder<ParseObject>(ParseObject('LogEntry'))
          ..whereGreaterThanOrEqualsTo('time', range.start)
          ..whereLessThanOrEqualTo('time', range.end);
    final ParseResponse apiResponse = await query.query();

    if (apiResponse.success && apiResponse.results != null) {
      return apiResponse.results!
          .map((e) => LogEntry(e as ParseObject))
          .toList();
    } else {
      return [];
    }
  }

  static Future<List<LogEntry>> fetchAll() async {
    QueryBuilder<ParseObject> query =
        QueryBuilder<ParseObject>(ParseObject('LogEntry'));
    final ParseResponse apiResponse = await query.query();

    if (apiResponse.success && apiResponse.results != null) {
      return apiResponse.results!
          .map((e) => LogEntry(e as ParseObject))
          .toList();
    } else {
      return [];
    }
  }

  static Future<LogEntry?> get(String objectId) async {
    QueryBuilder<ParseObject> query =
        QueryBuilder<ParseObject>(ParseObject('LogEntry'))
          ..whereEqualTo('objectId', objectId);
    final ParseResponse apiResponse = await query.query();

    if (apiResponse.success && apiResponse.results != null) {
      return LogEntry(apiResponse.result.first);
    }
  }

  static Future<void> save({
    required DateTime time,
    int? mgPerDl,
    double? mmolPerL,
    double? bolusGlucose,
    int? delayedBolusDuration,
    double? delayedBolusRatio,
    String? notes,
  }) async {
    final logEntry = ParseObject('LogEntry')
      ..set('time', time)
      ..set('bolusGlucose', bolusGlucose)
      ..set('delayedBolusDuration', delayedBolusDuration)
      ..set('delayedBolusRatio', delayedBolusRatio)
      ..set('notes', notes);

    if (!(mgPerDl == null && mmolPerL == null)) {
      logEntry.set(
          'mgPerDl',
          mgPerDl != null
              ? mgPerDl.round()
              : Utils.convertMmolPerLToMgPerDl(mmolPerL ?? 0));
      logEntry.set(
          'mmolPerL',
          mmolPerL != null
              ? mmolPerL * 100
              : Utils.convertMgPerDlToMmolPerL(mgPerDl ?? 0) * 100);
    }

    await logEntry.save();
  }

  static Future<void> update(
    String objectId, {
    DateTime? time,
    int? mgPerDl,
    double? mmolPerL,
    double? bolusGlucose,
    int? delayedBolusDuration,
    double? delayedBolusRatio,
    String? notes,
  }) async {
    final logEntry = ParseObject('LogEntry');

    if (time != null) {
      logEntry.set('time', time);
    }

    if (bolusGlucose != null) {
      logEntry.set('bolusGlucose', bolusGlucose);
    }

    if (delayedBolusDuration != null) {
      logEntry.set('delayedBolusDuration', delayedBolusDuration);
    }

    if (delayedBolusRatio != null) {
      logEntry.set('delayedBolusRatio', delayedBolusRatio);
    }

    if (notes != null) {
      logEntry.set('notes', notes);
    }

    if (!(mgPerDl == null && mmolPerL == null)) {
      logEntry.set(
          'mgPerDl',
          mgPerDl != null
              ? mgPerDl.round()
              : Utils.convertMmolPerLToMgPerDl(mmolPerL ?? 0));
      logEntry.set(
          'mmolPerL',
          mmolPerL != null
              ? mmolPerL * 100
              : Utils.convertMgPerDlToMmolPerL(mgPerDl ?? 0) * 100);
    }
    await logEntry.save();
  }

  Future<void> delete() async {
    var logEntry = ParseObject('LogEntry')..objectId = objectId;
    await logEntry.delete();
  }
}