#!/bin/bash
# Route 5 departure watcher v2 — direction-aware, runs in background
# Called by monitor.sh with env vars set
set -eo pipefail

VP_URL="https://data.texas.gov/download/cuc7-ywmd/application%2Fjson"
TOKEN=$(printenv DISCORD_BOT_TOKEN)
MAX_POLLS=${MAX_POLLS:-40}
POLL_INTERVAL=20
PID_FILE="/home/node/.openclaw/workspace/skills/capmetro-monitor/memory/watcher.pid"

# Clean up PID file on exit (success, timeout, or signal)
cleanup() { rm -f "$PID_FILE" 2>/dev/null; }
trap cleanup EXIT INT TERM

for i in $(seq 1 $MAX_POLLS); do
    VP=$(curl -sL --max-time 8 "$VP_URL" 2>/dev/null)
    
    VEHICLE=$(echo "$VP" | jq -c ".entity[] | select(.vehicle.trip.tripId == \"$TRIP_ID\")" 2>/dev/null)
    
    if [ -z "$VEHICLE" ]; then
        sleep $POLL_INTERVAL
        continue
    fi
    
    STOP_ID=$(echo "$VEHICLE" | jq -r '.vehicle.stopId')
    STATUS=$(echo "$VEHICLE" | jq -r '.vehicle.currentStatus')
    VEH_ID=$(echo "$VEHICLE" | jq -r '.vehicle.vehicle.label')
    
    # Bus has left the first stop
    if [ "$STOP_ID" != "$FIRST_STOP" ] || { [ "$STATUS" = "IN_TRANSIT_TO" ] && [ "$STOP_ID" != "$FIRST_STOP" ]; }; then
        ACTUAL_TS=$(date +%s)
        ACTUAL_CST=$(TZ=America/Chicago date +"%I:%M %p")
        DELAY=$((ACTUAL_TS - DEPART_TS))
        DELAY_MIN=$((DELAY / 60))
        
        if [ "$DELAY_MIN" -le 0 ]; then
            STATUS_ICON="🟢"
            STATUS_TEXT="On time"
        elif [ "$DELAY_MIN" -le 2 ]; then
            STATUS_ICON="🟡"
            STATUS_TEXT="~${DELAY_MIN}min late"
        else
            STATUS_ICON="🔴"
            STATUS_TEXT="${DELAY_MIN}min late"
        fi
        
        # Calculate ETAs
        ETA_USER=$((ACTUAL_TS + TRAVEL_FIRST_TO_USER))
        ETA_USER_CST=$(TZ=America/Chicago date -d "@$ETA_USER" +"%I:%M %p")
        
        if [ "$DIRECTION" = "0" ]; then
            # EASTBOUND: simple alert
            MSG=$(printf '🚌 **Route 5 %s Departed!**\nBus %s left %s at %s\n%s %s\n📍 ETA at %s: **%s**' \
                "$DIR_NAME" "$VEH_ID" "$FIRST_STOP_NAME" "$ACTUAL_CST" \
                "$STATUS_ICON" "$STATUS_TEXT" "$USER_STOP_NAME" "$ETA_USER_CST")
        else
            # WESTBOUND: include leave-office time and home ETA
            LEAVE_TS=$((ETA_USER - WALK_LEAD))
            LEAVE_CST=$(TZ=America/Chicago date -d "@$LEAVE_TS" +"%I:%M %p")
            ETA_HOME=$((ACTUAL_TS + TRAVEL_FIRST_TO_USER + TRAVEL_USER_TO_HOME))
            ETA_HOME_CST=$(TZ=America/Chicago date -d "@$ETA_HOME" +"%I:%M %p")
            
            MSG=$(printf '🚌 **Route 5 %s Departed!**\nBus %s left %s at %s\n%s %s\n\n🚶 **Leave office by %s** (15 min walk)\n📍 Bus arrives %s: **%s**\n🏠 Home (%s): **%s**' \
                "$DIR_NAME" "$VEH_ID" "$FIRST_STOP_NAME" "$ACTUAL_CST" \
                "$STATUS_ICON" "$STATUS_TEXT" \
                "$LEAVE_CST" "$USER_STOP_NAME" "$ETA_USER_CST" \
                "$HOME_STOP_NAME" "$ETA_HOME_CST")
        fi
        
        curl -s -X POST -H "Authorization: Bot $TOKEN" -H "Content-Type: application/json" \
            -d "$(jq -n --arg c "$MSG" '{content: $c}')" \
            "https://discord.com/api/v10/channels/$CHANNEL/messages" > /dev/null
        exit 0
    fi
    
    sleep $POLL_INTERVAL
done

# Timeout
SCHED_CST=$(TZ=America/Chicago date -d "@$DEPART_TS" +"%I:%M %p" 2>/dev/null)
curl -s -X POST -H "Authorization: Bot $TOKEN" -H "Content-Type: application/json" \
    -d "{\"content\":\"⚠️ Route 5 $DIR_NAME watcher timed out — could not confirm $SCHED_CST departure.\"}" \
    "https://discord.com/api/v10/channels/$CHANNEL/messages" > /dev/null