using System.Net.Http;
using System.Net.Http.Json;
using System.Threading.Tasks;

namespace TIAM.Services.Server
{
    public class GooglePlacesService
    {
        private readonly HttpClient _httpClient;
        private readonly string _apiKey = "AIzaSyAyEYJkpt2KDa3SJ34UNWO4-dNOJKmUtF8";

        public GooglePlacesService(HttpClient httpClient)
        {
            _httpClient = httpClient;
        }

        public async Task<string> ValidateAddressAsync(string address)
        {
            var requestUri = $"https://maps.googleapis.com/maps/api/place/findplacefromtext/json?input={address}&inputtype=textquery&fields=formatted_address,name&key={_apiKey}";

            var response = await _httpClient.GetFromJsonAsync<GooglePlacesResponse>(requestUri);

            return response?.Candidates?.Length > 0 ? "Valid address" : "Invalid address";
        }

        public async Task<string> CalculateRouteAsync(string origin, string destination, DateTime travelTime)
        {
            // Convert the travel time to Unix time
            long unixTime = ((DateTimeOffset)travelTime).ToUnixTimeSeconds();
            var requestUri = $"https://maps.googleapis.com/maps/api/directions/json?origin={origin}&destination={destination}&departure_time={unixTime}&key={_apiKey}";

            var response = await _httpClient.GetFromJsonAsync<GoogleDirectionsResponse>(requestUri);

            if (response?.Routes?.Length > 0)
            {
                var route = response.Routes[0];
                return $"Distance: {route.Legs[0].Distance.Text}, Duration: {route.Legs[0].Duration.Text} (with traffic: {route.Legs[0].DurationInTraffic?.Text})";
            }

            return "Route not found";
        }

        public async Task<List<string>> GetPlacePredictionsAsync(string input)
        {
            var requestUri = $"https://maps.googleapis.com/maps/api/place/autocomplete/json?input={input}&key={_apiKey}";

            var response = await _httpClient.GetFromJsonAsync<GooglePlacesAutocompleteResponse>(requestUri);

            var predictions = new List<string>();
            if (response?.Predictions != null)
            {
                foreach (var prediction in response.Predictions)
                {
                    predictions.Add(prediction.Description);
                }
            }

            return predictions;
        }
    }

    public class GooglePlacesAutocompleteResponse
    {
        public Prediction[] Predictions { get; set; }
    }

    public class Prediction
    {
        public string Description { get; set; }
    }

    public class GooglePlacesResponse
    {
        public Candidate[]? Candidates { get; set; }
    }

    public class Candidate
    {
        public string? Formatted_Address { get; set; }
        public string? Name { get; set; }
    }

    public class GoogleDirectionsResponse
    {
        public Route[]? Routes { get; set; }
    }

    public class Route
    {
        public Leg[]? Legs { get; set; }
    }

    public class Leg
    {
        public TextValue? Distance { get; set; }
        public TextValue? Duration { get; set; }
        public TextValue? DurationInTraffic { get; set; }
    }

    public class TextValue
    {
        public string Text { get; set; }
    }
}