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using System.Net;
using Enmarcha.Sources.OpenTripPlannerGql;
using Enmarcha.Sources.OpenTripPlannerGql.Queries;
using Enmarcha.Backend.Configuration;
using Enmarcha.Backend.Services;
using Enmarcha.Backend.Services.Geocoding;
using Enmarcha.Backend.Types.Planner;
using FuzzySharp;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Caching.Memory;
using Microsoft.Extensions.Options;
namespace Enmarcha.Backend.Controllers;
[ApiController]
[Route("api/planner")]
public partial class RoutePlannerController : ControllerBase
{
private readonly ILogger<RoutePlannerController> _logger;
private readonly OtpService _otpService;
private readonly IGeocodingService _geocodingService;
private readonly AppConfiguration _config;
private readonly HttpClient _httpClient;
private readonly IMemoryCache _cache;
private readonly FeedService _feedService;
private const string GaliciaBounds = "-9.3,43.8,-6.7,41.7";
public RoutePlannerController(
ILogger<RoutePlannerController> logger,
OtpService otpService,
IGeocodingService geocodingService,
IOptions<AppConfiguration> config,
HttpClient httpClient,
IMemoryCache cache,
FeedService feedService
)
{
_logger = logger;
_otpService = otpService;
_geocodingService = geocodingService;
_config = config.Value;
_httpClient = httpClient;
_cache = cache;
_feedService = feedService;
}
[HttpGet("autocomplete")]
public async Task<ActionResult<List<PlannerSearchResult>>> Autocomplete([FromQuery] string query)
{
if (string.IsNullOrWhiteSpace(query))
{
return BadRequest("Query cannot be empty");
}
var nominatimTask = _geocodingService.GetAutocompleteAsync(query);
var stopsTask = GetCachedStopsAsync();
await Task.WhenAll(nominatimTask, stopsTask);
var geocodingResults = await nominatimTask;
var allStops = await stopsTask;
// 1. Exact or prefix matches by stop code
var codeMatches = allStops
.Where(s => s.StopCode != null && s.StopCode.StartsWith(query, StringComparison.OrdinalIgnoreCase))
.OrderBy(s => s.StopCode?.Length) // Shorter codes (more exact matches) first
.Take(5)
.ToList();
// 2. Fuzzy search stops by label (Name + Code)
var fuzzyResults = Process.ExtractSorted(
query,
allStops.Select(s => s.Label ?? string.Empty),
cutoff: 60
).Take(6).Select(r => allStops[r.Index]).ToList();
// Merge stops, prioritizing code matches
var stopResults = codeMatches.Concat(fuzzyResults)
.GroupBy(s => s.StopId)
.Select(g => g.First())
.Take(6)
.ToList();
// Merge results: geocoding first, then stops, deduplicating by coordinates (approx)
var finalResults = new List<PlannerSearchResult>(geocodingResults);
foreach (var res in stopResults)
{
if (!finalResults.Any(f => Math.Abs(f.Lat - res.Lat) < 0.00001 && Math.Abs(f.Lon - res.Lon) < 0.00001))
{
finalResults.Add(res);
}
}
return Ok(finalResults);
}
[HttpGet("reverse")]
public async Task<ActionResult<PlannerSearchResult>> Reverse([FromQuery] double lat, [FromQuery] double lon)
{
var result = await _geocodingService.GetReverseGeocodeAsync(lat, lon);
if (result == null)
{
return NotFound();
}
return Ok(result);
}
[HttpGet("plan")]
public async Task<ActionResult<RoutePlan>> Plan(
[FromQuery] double fromLat,
[FromQuery] double fromLon,
[FromQuery] double toLat,
[FromQuery] double toLon,
[FromQuery] DateTimeOffset? time,
[FromQuery] bool arriveBy = false)
{
try
{
var requestContent = PlanConnectionContent.Query(
new PlanConnectionContent.Args(fromLat, fromLon, toLat, toLon, time ?? DateTimeOffset.Now, arriveBy)
);
var request = new HttpRequestMessage(HttpMethod.Post, $"{_config.OpenTripPlannerBaseUrl}/gtfs/v1");
request.Content = JsonContent.Create(new GraphClientRequest
{
Query = requestContent
});
var response = await _httpClient.SendAsync(request);
var responseBody = await response.Content.ReadFromJsonAsync<GraphClientResponse<PlanConnectionResponse>>();
if (responseBody is not { IsSuccess: true })
{
LogErrorFetchingRoutes(response.StatusCode, await response.Content.ReadAsStringAsync());
return StatusCode(500, "An error occurred while planning the route.");
}
var plan = _otpService.MapPlanResponse(responseBody.Data!);
return Ok(plan);
}
catch (Exception e)
{
_logger.LogError("Exception planning route: {e}", e);
return StatusCode(500, "An error occurred while planning the route.");
}
}
[LoggerMessage(LogLevel.Error, "Error fetching route planning, received {statusCode} {responseBody}")]
partial void LogErrorFetchingRoutes(HttpStatusCode? statusCode, string responseBody);
private async Task<List<PlannerSearchResult>> GetCachedStopsAsync()
{
const string cacheKey = "planner_mapped_stops";
if (_cache.TryGetValue(cacheKey, out List<PlannerSearchResult>? cachedStops))
{
return cachedStops!;
}
var allStopsRaw = await _otpService.GetStopsByBboxAsync(-9.3, 41.7, -6.7, 43.8);
var stops = allStopsRaw.Select(s =>
{
var feedId = s.GtfsId.Split(':')[0];
var name = FeedService.NormalizeStopName(feedId, s.Name);
var code = _feedService.NormalizeStopCode(feedId, s.Code ?? string.Empty);
return new PlannerSearchResult
{
Name = name,
Label = string.IsNullOrWhiteSpace(code) ? name : $"{name} ({code})",
Lat = s.Lat,
Lon = s.Lon,
Layer = "stop",
StopId = s.GtfsId,
StopCode = code
};
}).ToList();
_cache.Set(cacheKey, stops, TimeSpan.FromHours(1));
return stops;
}
}
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