#!/bin/bash
# Route 5 on-demand monitor — checks real-time bus status
# Usage: bash route5-status.sh
set -eo pipefail

VP_URL="https://data.texas.gov/download/cuc7-ywmd/application%2Fjson"
TU_URL="https://data.texas.gov/download/mqtr-wwpy/application%2Fjson"

# Fetch both feeds in parallel
VP=$(curl -sL --max-time 10 "$VP_URL") &
TU=$(curl -sL --max-time 10 "$TU_URL") &
VP=$(curl -sL --max-time 10 "$VP_URL")
TU=$(curl -sL --max-time 10 "$TU_URL")

NOW=$(date +%s)

# Route 5 eastbound vehicles
VEHICLES=$(echo "$VP" | jq -c '[.entity[] | select(.vehicle.trip.routeId == "5" and .vehicle.trip.directionId == 0) | {
  vehicleId: .vehicle.vehicle.label,
  tripId: .vehicle.trip.tripId,
  stopId: .vehicle.stopId,
  status: .vehicle.currentStatus,
  lat: .vehicle.position.latitude,
  lon: .vehicle.position.longitude,
  speed: .vehicle.position.speed
}]')

# Route 5 eastbound trip updates
TRIPS=$(echo "$TU" | jq -c --arg now "$NOW" '[.entity[] | select(.tripUpdate.trip.routeId == "5" and .tripUpdate.trip.directionId == 0) | {
  tripId: .tripUpdate.trip.tripId,
  firstStopDepart: ([.tripUpdate.stopTimeUpdate[] | select(.stopId == "5854") | (.departure.time // .arrival.time)] | .[0]),
  userStopArrive: ([.tripUpdate.stopTimeUpdate[] | select(.stopId == "964") | (.arrival.time // .departure.time)] | .[0]),
  userStopDelay: ([.tripUpdate.stopTimeUpdate[] | select(.stopId == "964") | (.arrival.delay // .departure.delay)] | .[0])
}] | [.[] | select(.firstStopDepart != null)] | sort_by(.firstStopDepart)')

# Format output
jq -n \
  --argjson vehicles "$VEHICLES" \
  --argjson trips "$TRIPS" \
  --arg now "$NOW" '{
    timestampUTC: ($now | tonumber | todate),
    timestampCST: (($now | tonumber - 21600) | todate),
    route: "5 - Woodrow/Lamar",
    direction: "Eastbound → Downtown",
    firstStop: "Anderson/Northcross (5854)",
    userStop: "Woodrow/Choquette (964)",
    scheduledTravel: "7m 26s",
    activeVehicles: ($vehicles | length),
    vehicles: $vehicles,
    nextDepartures: [$trips[] | {
      tripId,
      firstStopDepart: (if .firstStopDepart then (.firstStopDepart | tonumber | todate) else null end),
      userStopArrive: (if .userStopArrive then (.userStopArrive | tonumber | todate) else null end),
      delaySec: .userStopDelay,
      minsUntilDepart: (if .firstStopDepart then (((.firstStopDepart | tonumber) - ($now | tonumber)) / 60 | floor) else null end),
      minsUntilArrive: (if .userStopArrive then (((.userStopArrive | tonumber) - ($now | tonumber)) / 60 | floor) else null end)
    }]
  }'