Location-Tracker/LocationTrackerApp/MainPage.xaml.cs

using LocationTrackerApp.Components;
using LocationTrackerApp.Models;

namespace LocationTrackerApp;

public partial class MainPage : ContentPage
{
	private bool _isTracking = false;
	private List<LocationData> _trackedLocations = new();

	public MainPage()
	{
		InitializeComponent();
		InitializeMap();
	}

	private void InitializeMap()
	{
		// The OpenStreetMapView initializes itself with a default location
		// Add some dummy location data to demonstrate heat map functionality
		AddDummyLocationData();
	}

	private void AddDummyLocationData()
	{
		// Add dummy location data around San Francisco Bay Area to demonstrate heat map
		var dummyLocations = new List<LocationData>
		{
			// Golden Gate Bridge area (high frequency)
			new LocationData { Latitude = 37.8199, Longitude = -122.4783, Timestamp = DateTime.UtcNow.AddMinutes(-30) },
			new LocationData { Latitude = 37.8200, Longitude = -122.4780, Timestamp = DateTime.UtcNow.AddMinutes(-29) },
			new LocationData { Latitude = 37.8201, Longitude = -122.4777, Timestamp = DateTime.UtcNow.AddMinutes(-28) },
			new LocationData { Latitude = 37.8198, Longitude = -122.4785, Timestamp = DateTime.UtcNow.AddMinutes(-27) },
			new LocationData { Latitude = 37.8202, Longitude = -122.4775, Timestamp = DateTime.UtcNow.AddMinutes(-26) },
			
			// Fisherman's Wharf area (medium frequency)
			new LocationData { Latitude = 37.8080, Longitude = -122.4177, Timestamp = DateTime.UtcNow.AddMinutes(-25) },
			new LocationData { Latitude = 37.8085, Longitude = -122.4175, Timestamp = DateTime.UtcNow.AddMinutes(-24) },
			new LocationData { Latitude = 37.8082, Longitude = -122.4180, Timestamp = DateTime.UtcNow.AddMinutes(-23) },
			
			// Union Square area (medium frequency)
			new LocationData { Latitude = 37.7879, Longitude = -122.4075, Timestamp = DateTime.UtcNow.AddMinutes(-22) },
			new LocationData { Latitude = 37.7882, Longitude = -122.4078, Timestamp = DateTime.UtcNow.AddMinutes(-21) },
			new LocationData { Latitude = 37.7877, Longitude = -122.4072, Timestamp = DateTime.UtcNow.AddMinutes(-20) },
			
			// Mission District area (low frequency)
			new LocationData { Latitude = 37.7599, Longitude = -122.4148, Timestamp = DateTime.UtcNow.AddMinutes(-19) },
			new LocationData { Latitude = 37.7602, Longitude = -122.4150, Timestamp = DateTime.UtcNow.AddMinutes(-18) },
			
			// Castro District area (low frequency)
			new LocationData { Latitude = 37.7611, Longitude = -122.4350, Timestamp = DateTime.UtcNow.AddMinutes(-17) },
			
			// SOMA area (medium frequency)
			new LocationData { Latitude = 37.7749, Longitude = -122.4194, Timestamp = DateTime.UtcNow.AddMinutes(-16) },
			new LocationData { Latitude = 37.7752, Longitude = -122.4197, Timestamp = DateTime.UtcNow.AddMinutes(-15) },
			new LocationData { Latitude = 37.7747, Longitude = -122.4191, Timestamp = DateTime.UtcNow.AddMinutes(-14) },
			new LocationData { Latitude = 37.7750, Longitude = -122.4194, Timestamp = DateTime.UtcNow.AddMinutes(-13) },
			
			// Financial District area (high frequency)
			new LocationData { Latitude = 37.7946, Longitude = -122.3998, Timestamp = DateTime.UtcNow.AddMinutes(-12) },
			new LocationData { Latitude = 37.7949, Longitude = -122.4001, Timestamp = DateTime.UtcNow.AddMinutes(-11) },
			new LocationData { Latitude = 37.7944, Longitude = -122.3995, Timestamp = DateTime.UtcNow.AddMinutes(-10) },
			new LocationData { Latitude = 37.7952, Longitude = -122.4004, Timestamp = DateTime.UtcNow.AddMinutes(-9) },
			new LocationData { Latitude = 37.7947, Longitude = -122.3999, Timestamp = DateTime.UtcNow.AddMinutes(-8) },
			new LocationData { Latitude = 37.7950, Longitude = -122.4002, Timestamp = DateTime.UtcNow.AddMinutes(-7) },
			
			// North Beach area (low frequency)
			new LocationData { Latitude = 37.8044, Longitude = -122.4098, Timestamp = DateTime.UtcNow.AddMinutes(-6) },
			
			// Chinatown area (medium frequency)
			new LocationData { Latitude = 37.7941, Longitude = -122.4078, Timestamp = DateTime.UtcNow.AddMinutes(-5) },
			new LocationData { Latitude = 37.7944, Longitude = -122.4081, Timestamp = DateTime.UtcNow.AddMinutes(-4) },
			new LocationData { Latitude = 37.7938, Longitude = -122.4075, Timestamp = DateTime.UtcNow.AddMinutes(-3) },
			
			// Marina District area (low frequency)
			new LocationData { Latitude = 37.8026, Longitude = -122.4430, Timestamp = DateTime.UtcNow.AddMinutes(-2) },
			
			// Presidio area (low frequency)
			new LocationData { Latitude = 37.7989, Longitude = -122.4662, Timestamp = DateTime.UtcNow.AddMinutes(-1) }
		};

		_trackedLocations.AddRange(dummyLocations);
		UpdateLocationCount();
	}

	private void UpdateLocationCount()
	{
		LocationCountLabel.Text = $"Locations: {_trackedLocations.Count}";
	}

	private async void OnStartTrackingClicked(object? sender, EventArgs e)
	{
		try
		{
			if (!_isTracking)
			{
				// Request location permissions
				var status = await Permissions.RequestAsync<Permissions.LocationWhenInUse>();
				if (status != PermissionStatus.Granted)
				{
					await DisplayAlert("Permission Required", "Location permission is required to track your location.", "OK");
					return;
				}

				// Start location tracking
				_isTracking = true;
				StartTrackingBtn.Text = "Tracking...";
				StartTrackingBtn.BackgroundColor = Colors.Orange;
				StopTrackingBtn.IsEnabled = true;

				// Simulate location tracking
				_ = Task.Run(async () => await SimulateLocationTracking());
			}
		}
		catch (Exception ex)
		{
			await DisplayAlert("Error", $"Failed to start tracking: {ex.Message}", "OK");
		}
	}

	private void OnStopTrackingClicked(object? sender, EventArgs e)
	{
		try
		{
			if (_isTracking)
			{
				_isTracking = false;
				StartTrackingBtn.Text = "Start Tracking";
				StartTrackingBtn.BackgroundColor = Colors.Green;
				StopTrackingBtn.IsEnabled = false;
			}
		}
		catch (Exception ex)
		{
			DisplayAlert("Error", $"Failed to stop tracking: {ex.Message}", "OK");
		}
	}

	private async Task SimulateLocationTracking()
	{
		while (_isTracking)
		{
			try
			{
				// Get current location
				var location = await Geolocation.GetLocationAsync();
				if (location != null)
				{
					// Update UI on main thread
					MainThread.BeginInvokeOnMainThread(async () =>
					{
						// Add location to tracked locations
						var locationData = new LocationData
						{
							Latitude = location.Latitude,
							Longitude = location.Longitude,
							Timestamp = DateTime.UtcNow
						};
						_trackedLocations.Add(locationData);
						UpdateLocationCount();
						
						// Add pin to OpenStreetMap
						await MainMap.AddLocationPinAsync(location, $"Current Location {_trackedLocations.Count}", 0.8);
					});
				}
			}
			catch (Exception ex)
			{
				// Handle location errors
				System.Diagnostics.Debug.WriteLine($"Location error: {ex.Message}");
			}

			// Wait 5 seconds before next update
			await Task.Delay(5000);
		}
	}

	private async void OnCenterMapClicked(object? sender, EventArgs e)
	{
		try
		{
			// Request location permissions if not already granted
			var status = await Permissions.CheckStatusAsync<Permissions.LocationWhenInUse>();
			if (status != PermissionStatus.Granted)
			{
				status = await Permissions.RequestAsync<Permissions.LocationWhenInUse>();
				if (status != PermissionStatus.Granted)
				{
					await DisplayAlert("Permission Required", "Location permission is required to center the map.", "OK");
					return;
				}
			}

			// Get current location
			var location = await Geolocation.GetLocationAsync();
			if (location != null)
			{
				// Clear existing pins
				await MainMap.ClearMapAsync();
				
				// Add a pin for current location
				await MainMap.AddLocationPinAsync(location, $"Your Location\nLat: {location.Latitude:F6}\nLng: {location.Longitude:F6}", 1.0);
				
				await DisplayAlert("Location Found", $"Map centered on your location:\nLat: {location.Latitude:F6}\nLng: {location.Longitude:F6}", "OK");
			}
			else
			{
				await DisplayAlert("Error", "Unable to get your current location.", "OK");
			}
		}
		catch (Exception ex)
		{
			await DisplayAlert("Error", $"Failed to center map: {ex.Message}", "OK");
		}
	}

	private async void OnHeatMapClicked(object? sender, EventArgs e)
	{
		try
		{
			if (_trackedLocations.Any())
			{
				// Load tracked locations into the heat map
				await MainMap.LoadLocationDataAsync(_trackedLocations);
				await DisplayAlert("Heat Map", $"Heat map updated with {_trackedLocations.Count} locations.\n\nAreas with higher frequency appear in red/yellow, lower frequency in blue.", "OK");
			}
			else
			{
				await DisplayAlert("No Data", "No location data available. Start tracking to create a heat map.", "OK");
			}
		}
		catch (Exception ex)
		{
			await DisplayAlert("Error", $"Failed to update heat map: {ex.Message}", "OK");
		}
	}

	private async void OnClearDemoClicked(object? sender, EventArgs e)
	{
		try
		{
			var result = await DisplayAlert("Clear Demo Data", "Are you sure you want to clear all demo location data?", "Yes", "No");
			if (result)
			{
				_trackedLocations.Clear();
				await MainMap.ClearMapAsync();
				UpdateLocationCount();
				await DisplayAlert("Demo Cleared", "All demo location data has been cleared.", "OK");
			}
		}
		catch (Exception ex)
		{
			await DisplayAlert("Error", $"Failed to clear demo data: {ex.Message}", "OK");
		}
	}

	private async void OnResetMapClicked(object? sender, EventArgs e)
	{
		try
		{
			await MainMap.ClearMapAsync();
			await DisplayAlert("Map Reset", "Map has been reset to default view.", "OK");
		}
		catch (Exception ex)
		{
			await DisplayAlert("Error", $"Failed to reset map: {ex.Message}", "OK");
		}
	}
}