#!/bin/bash
# Check CapMetro service changes for Route 5 and Route 500
# Returns JSON with new changes since last check

set -e

STATE_FILE="${STATE_FILE:-memory/capmetro-check-state.json}"
WORKSPACE="${WORKSPACE:-/home/node/.openclaw/workspace}"
cd "$WORKSPACE"

# Initialize state if missing
if [ ! -f "$STATE_FILE" ]; then
    mkdir -p "$(dirname "$STATE_FILE")"
    echo '{"lastCheck":"1970-01-01T00:00:00Z","seenChanges":[]}' > "$STATE_FILE"
fi

NOW=$(date -u +"%Y-%m-%dT%H:%M:%SZ")

# Fetch current service changes page
CHANGES=$(curl -s "https://www.capmetro.org/servicechange" | \
  grep -oP 'href="/servicechange/[^"]+' | \
  sed 's/href="//' | \
  sort -u)

# Check each change period for Route 5 or Route 500
RELEVANT_CHANGES='[]'

for change_url in $CHANGES; do
    FULL_URL="https://www.capmetro.org$change_url"
    CONTENT=$(curl -s "$FULL_URL")
    
    # Check if Route 5 or Route 500 mentioned
    if echo "$CONTENT" | grep -qiE "(Route 5[^0-9]|Route 500)"; then
        TITLE=$(echo "$CONTENT" | grep -oP '<title>\K[^<]+' | head -1)
        RELEVANT_CHANGES=$(echo "$RELEVANT_CHANGES" | jq --arg url "$FULL_URL" --arg title "$TITLE" \
            '. += [{"url":$url, "title":$title, "id":$url}]')
    fi
done

# Load seen changes
SEEN=$(jq -r '.seenChanges // []' "$STATE_FILE")

# Find new changes
NEW_CHANGES=$(echo "$RELEVANT_CHANGES" | jq --argjson seen "$SEEN" '[
    .[] | select(.id as $id | $seen | index($id) | not)
]')

NEW_COUNT=$(echo "$NEW_CHANGES" | jq 'length')

# Update state
ALL_IDS=$(echo "$RELEVANT_CHANGES" | jq -r '[.[].id]')
jq -n \
  --arg now "$NOW" \
  --argjson ids "$ALL_IDS" \
  '{lastCheck:$now, seenChanges:$ids}' > "$STATE_FILE"

# Output
if [ "$NEW_COUNT" -eq 0 ]; then
    echo '{"hasNew":false}'
    exit 0
fi

jq -n --argjson changes "$NEW_CHANGES" '{hasNew:true, newChanges:$changes}'