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using Costasdev.Busurbano.Backend.Configuration;
using Costasdev.Busurbano.Backend.Services.Providers;
using Costasdev.Busurbano.Backend.Types.Planner;
using Microsoft.Extensions.Options;
namespace Costasdev.Busurbano.Backend.Services;
public record FareResult(decimal CashFareEuro, bool CashFareIsTotal, decimal CardFareEuro, bool CardFareIsTotal);
public class FareService
{
private readonly AppConfiguration _config;
private readonly XuntaFareProvider _xuntaFareProvider;
private readonly ILogger<FareService> _logger;
private const decimal VitrasaCashFare = 1.63M;
private const decimal VitrasaCardFare = 0.67M;
private const decimal CorunaCashFare = 1.30M;
private const decimal CorunaCardFare = 0.45M;
private const decimal SantiagoCashFare = 1.00M;
private const decimal SantiagoCardFare = 0.36M;
public FareService(
IOptions<AppConfiguration> config,
XuntaFareProvider xuntaFareProvider,
ILogger<FareService> logger
)
{
_config = config.Value;
_xuntaFareProvider = xuntaFareProvider;
_logger = logger;
}
public FareResult CalculateFare(IEnumerable<Leg> legs)
{
var transitLegs = legs
.Where(l => l.Mode != null && !l.Mode.Equals("WALK", StringComparison.CurrentCultureIgnoreCase))
.ToList();
if (!transitLegs.Any())
{
return new FareResult(0, true, 0, true);
}
var cashResult = CalculateCashTotal(transitLegs);
var cardResult = CalculateCardTotal(transitLegs);
return new FareResult(
cashResult.Item1, cashResult.Item2,
cardResult.Item1, cardResult.Item2
);
}
private (decimal, bool) CalculateCashTotal(IEnumerable<Leg> legs)
{
decimal total = 0L;
bool allLegsProcessed = true;
foreach (var leg in legs)
{
switch (leg.FeedId)
{
case "santiago":
total += SantiagoCashFare;
break;
case "coruna":
total += CorunaCashFare;
break;
case "vitrasa":
total += VitrasaCashFare;
break;
case "xunta":
// TODO: Handle potentiall blow-ups
if (leg.From is not { ZoneId: not null })
{
_logger.LogInformation("Ignored fare calculation for leg without From ZoneId. {FromStop}", leg.From?.StopId);
}
if (leg.To is not { ZoneId: not null })
{
_logger.LogInformation("Ignored fare calculation for leg without To ZoneId. {ToStop}", leg.To?.StopId);
}
total += _xuntaFareProvider.GetPrice(leg.From!.ZoneId!, leg.To!.ZoneId!)!.PriceCash;
break;
default:
allLegsProcessed = false;
_logger.LogWarning("Unknown FeedId: {FeedId}", leg.FeedId);
break;
}
}
return (total, allLegsProcessed);
}
private (decimal, bool) CalculateCardTotal(IEnumerable<Leg> legs)
{
List<TicketPurchased> wallet = [];
decimal totalCost = 0;
bool allLegsProcessed = true;
foreach (var leg in legs)
{
int maxMinutes;
int maxUsages;
string? metroArea = null;
decimal initialFare = 0;
switch (leg.FeedId)
{
case "vitrasa":
maxMinutes = 45;
maxUsages = 3;
initialFare = VitrasaCardFare;
break;
case "coruna":
maxMinutes = 45;
maxUsages = 2;
initialFare = CorunaCardFare;
break;
case "santiago":
maxMinutes = 60;
maxUsages = 2;
initialFare = SantiagoCardFare;
break;
case "xunta":
if (leg.From?.ZoneId == null || leg.To?.ZoneId == null)
{
_logger.LogWarning("Missing ZoneId for Xunta leg. From: {From}, To: {To}", leg.From?.StopId, leg.To?.StopId);
continue;
}
var priceRecord = _xuntaFareProvider.GetPrice(leg.From.ZoneId, leg.To.ZoneId);
if (priceRecord == null)
{
_logger.LogWarning("No price record found for Xunta leg from {From} to {To}", leg.From.ZoneId, leg.To.ZoneId);
continue;
}
metroArea = priceRecord.MetroArea;
initialFare = priceRecord.PriceCard;
maxMinutes = 60;
maxUsages = (metroArea != null && metroArea.StartsWith("ATM", StringComparison.OrdinalIgnoreCase)) ? 3 : 1;
break;
default:
_logger.LogWarning("Unknown FeedId: {FeedId}", leg.FeedId);
allLegsProcessed = false;
continue;
}
var validTicket = wallet.FirstOrDefault(t => t.FeedId == leg.FeedId && t.IsValid(leg.StartTime, maxMinutes, maxUsages));
if (validTicket != null)
{
if (leg.FeedId == "xunta" && maxUsages > 1) // ATM upgrade logic
{
var upgradeRecord = _xuntaFareProvider.GetPrice(validTicket.StartZone, leg.To!.ZoneId!);
if (upgradeRecord != null)
{
decimal upgradeCost = Math.Max(0, upgradeRecord.PriceCard - validTicket.TotalPaid);
totalCost += upgradeCost;
validTicket.TotalPaid += upgradeCost;
validTicket.UsedTimes++;
_logger.LogDebug("Xunta ATM upgrade: added {Cost}€, total paid for ticket: {TotalPaid}€", upgradeCost, validTicket.TotalPaid);
}
else
{
// Fallback: treat as new ticket if upgrade path not found
totalCost += initialFare;
wallet.Add(new TicketPurchased
{
FeedId = leg.FeedId,
PurchasedAt = leg.StartTime,
MetroArea = metroArea,
StartZone = leg.From!.ZoneId!,
TotalPaid = initialFare
});
}
}
else
{
// Free transfer for city systems or non-ATM Xunta (though non-ATM Xunta has maxUsages=1)
validTicket.UsedTimes++;
_logger.LogDebug("Free transfer for {FeedId}", leg.FeedId);
}
}
else
{
// New ticket
totalCost += initialFare;
wallet.Add(new TicketPurchased
{
FeedId = leg.FeedId!,
PurchasedAt = leg.StartTime,
MetroArea = metroArea,
StartZone = leg.FeedId == "xunta" ? leg.From!.ZoneId! : string.Empty,
TotalPaid = initialFare
});
_logger.LogDebug("New ticket for {FeedId}: {Cost}€", leg.FeedId, initialFare);
}
}
return (totalCost, allLegsProcessed);
}
}
public class TicketPurchased
{
public required string FeedId { get; set; }
public DateTime PurchasedAt { get; set; }
public string? MetroArea { get; set; }
public required string StartZone { get; set; }
public int UsedTimes = 1;
public decimal TotalPaid { get; set; }
public bool IsValid(DateTime startTime, int maxMinutes, int maxUsagesIncluded)
{
return (startTime - PurchasedAt).TotalMinutes <= maxMinutes && UsedTimes < maxUsagesIncluded;
}
}
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