API/src/HeartTrackAPI/Controllers/AnalysisController.cs

using Dto.Tiny;
using Microsoft.AspNetCore.Mvc;

namespace HeartTrackAPI.Controllers;

[ApiController]
[ApiVersion("1.0")]
[Route("api/[controller]")]
public class AnalysisController : ControllerBase
{
    private readonly List<HeartRateZone> _heartRateZones = new()
    {
        new() { Name = "Repos", MinHeartRate = 0, MaxHeartRate = 60 },
        new() { Name = "Aérobie légère", MinHeartRate = 61, MaxHeartRate = 90 },
        new() { Name = "Aérobie", MinHeartRate = 91, MaxHeartRate = 140 },
        new() { Name = "Anaérobie", MinHeartRate = 141, MaxHeartRate = 180 },
        new() { Name = "VO2 Max", MinHeartRate = 181, MaxHeartRate = 220 }
    };

    [HttpGet("heart-rate/zones")]
    public IActionResult GetHeartRateZones()
    {
        var heartRates = GetMockHeartRateData();
        var results = _heartRateZones.Select(zone => new HeartRateZoneResult
        {
            Zone = zone.Name,
            TimeSpent = CalculateTimeInZone(zone, heartRates)
        }).ToList();
        return Ok(results);
    }

    private TimeSpan CalculateTimeInZone(HeartRateZone zone, List<HeartRateTinyDto> heartRates)
    {
        var secondsInZone =
            heartRates.Count(hr => hr.HeartRate >= zone.MinHeartRate && hr.HeartRate <= zone.MaxHeartRate);
        return TimeSpan.FromSeconds(secondsInZone);
    }

    private List<HeartRateTinyDto> GetMockHeartRateData()
    {
        var random = new Random();
        return Enumerable.Range(1, 3600)
            .Select(_ => new HeartRateTinyDto
            {
                HeartRate = random.Next(60, 220),
                Timestamp = new DateTime(2021, 1, 1).AddSeconds(random.Next(3600)),
                Latitude = random.NextDouble() * 180 - 90,
                Longitude = random.NextDouble() * 360 - 180,
                Altitude = random.NextDouble() * 1000,
                Cadence = random.Next(60, 120),
                Distance = random.NextDouble() * 100,
                Speed = random.NextDouble() * 30,
                Power = random.Next(0, 500),
                Temperature = random.NextDouble() * 30
            }).ToList();
    }
}

public class HeartRateZoneResult
{
    public string Zone { get; set; }
    public TimeSpan TimeSpent { get; set; }
}

internal class HeartRateZone
{
    public string Name { get; set; }
    public int MinHeartRate { get; set; }
    public int MaxHeartRate { get; set; }
}