API/src/Model/Activity.cs

using System.ComponentModel.DataAnnotations;

namespace Model;
public class Activity
    {
        public int Id { get; set; }
        public string Type { get; set; }
        public DateTime Date { get; set; }
        public DateTime StartTime { get; set; }
        public DateTime EndTime { get; set; }
        
        private int _effort;
        [Range(0, 5)]
        public int Effort
        {
            get => _effort;
            set
            {
                if (value < 0 || value > 5)
                {
                    throw new ArgumentException("Effort must be between 0 and 5.");
                }
                _effort = value;
            }
        }
        public float Variability { get; set; }
        public float Variance { get; set; }
        public float StandardDeviation { get; set; }
        public float Average { get; set; }
        public int Maximum { get; set; }
        public int Minimum { get; set; }
        public float AverageTemperature { get; set; }
        public bool HasAutoPause { get; set; }

        public Activity(int idActivity ,string type, DateTime date, DateTime startTime, DateTime endTime,
                        int effort, float variability, float variance, float standardDeviation,
                        float average, int maximum, int minimum, float averageTemperature, bool hasAutoPause)
        {
            Id = idActivity;
            Type = type;
            Date = date;
            StartTime = startTime;
            EndTime = endTime;
            Effort = effort;
            Variability = variability;
            Variance = variance;
            StandardDeviation = standardDeviation;
            Average = average;
            Maximum = maximum;
            Minimum = minimum;
            AverageTemperature = averageTemperature;
            HasAutoPause = hasAutoPause;
        }
        public Activity(){}
        
        public override string ToString()
        {
            return $"Activity #{Id}: {Type} on {Date:d/M/yyyy} from {StartTime:HH:mm:ss} to {EndTime:HH:mm:ss}" +
                   $" with an effort of {Effort}/5 and an average temperature of {AverageTemperature}°C" +
                   $" and a heart rate variability of {Variability} bpm" +
                   $" and a variance of {Variance} bpm" +
                   $" and a standard deviation of {StandardDeviation} bpm" +
                   $" and an average of {Average} bpm" +
                   $" and a maximum of {Maximum} bpm" +
                   $" and a minimum of {Minimum} bpm" +
                   $" and auto pause is {(HasAutoPause ? "enabled" : "disabled")}.";
        }
    }