#!/bin/zsh

# Web Apps Monitor - Auto-restart if down
# Ports: 3000 (gantt-board), 3003 (blog-backup), 3005 (heartbeat-monitor)

LOG_FILE="/Users/mattbruce/.openclaw/workspace/memory/web-monitor.log"
LOCK_FILE="/tmp/web-monitor.lock"
TIMESTAMP=$(date '+%Y-%m-%d %H:%M:%S %Z')

# Prevent concurrent runs
if [ -f "$LOCK_FILE" ]; then
    # Check if lock is stale (older than 2 minutes)
    lock_age=$(($(date +%s) - $(stat -c %Y "$LOCK_FILE" 2>/dev/null || stat -f %m "$LOCK_FILE" 2>/dev/null || echo 0)))
    if [ "$lock_age" -lt 120 ]; then
        echo "[$TIMESTAMP] Monitor already running, skipping..." >> "$LOG_FILE"
        exit 0
    else
        echo "[$TIMESTAMP] Removing stale lock file" >> "$LOG_FILE"
        rm -f "$LOCK_FILE"
    fi
fi

# Create lock file
touch "$LOCK_FILE"

# Ensure lock is removed on exit
trap "rm -f $LOCK_FILE" EXIT

# Ensure PATH for cron (include Homebrew on macOS)
export PATH="/opt/homebrew/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:$HOME/.local/bin:$PATH"

# Ensure log file exists
touch "$LOG_FILE"

# Function to check health
check_health() {
    local port=$1
    local name=$2
    local code=$(curl -s -o /dev/null -w "%{http_code}" --max-time 5 "http://localhost:$port" 2>/dev/null || echo "DOWN")
    echo "$code"
}

# Function to restart app
restart_app() {
    local port=$1
    local name=$2
    local path=$3
    
    echo "[$TIMESTAMP] ⚠️ $name (port $port) is DOWN - restarting..." >> "$LOG_FILE"
    
    # Kill process on that port
    pkill -f ":$port" 2>/dev/null
    /bin/sleep 2
    
    # Restart in background using full path to npm
    cd "$path" && /opt/homebrew/bin/npm run dev -- --port "$port" > /dev/null 2>&1 &
    
    echo "[$TIMESTAMP] 🔄 $name restarted on port $port" >> "$LOG_FILE"
}

# Check all apps
RESTARTED=()

# Port 3000 - gantt-board
code3000=$(check_health 3000 "gantt-board")
if [ "$code3000" != "200" ]; then
    restart_app 3000 "gantt-board" "/Users/mattbruce/Documents/Projects/OpenClaw/Web/gantt-board"
    RESTARTED+=("gantt-board")
fi

# Port 3003 - blog-backup
code3003=$(check_health 3003 "blog-backup")
if [ "$code3003" != "200" ]; then
    restart_app 3003 "blog-backup" "/Users/mattbruce/Documents/Projects/OpenClaw/Web/blog-backup"
    RESTARTED+=("blog-backup")
fi

# Port 3005 - heartbeat-monitor
code3005=$(check_health 3005 "heartbeat-monitor")
if [ "$code3005" != "200" ]; then
    restart_app 3005 "heartbeat-monitor" "/Users/mattbruce/Documents/Projects/OpenClaw/Web/heartbeat-monitor"
    RESTARTED+=("heartbeat-monitor")
fi

# If any were restarted, wait and re-verify
if [ ${#RESTARTED[@]} -gt 0 ]; then
    /bin/sleep 5
    
    for app in "${RESTARTED[@]}"; do
        case $app in
            "gantt-board") port=3000 ;;
            "blog-backup") port=3003 ;;
            "heartbeat-monitor") port=3005 ;;
        esac
        
        verify_code=$(check_health "$port" "$app")
        if [ "$verify_code" = "200" ]; then
            echo "[$TIMESTAMP] ✅ $app verified healthy (HTTP 200)" >> "$LOG_FILE"
        else
            echo "[$TIMESTAMP] ❌ $app still unhealthy (HTTP $verify_code)" >> "$LOG_FILE"
        fi
    done
else
    # All healthy - log periodically (every 6 runs ~ 30 min with 5-min interval)
    if [ ! -f /tmp/web-monitor-counter ]; then
        echo "0" > /tmp/web-monitor-counter
    fi
    counter=$(cat /tmp/web-monitor-counter)
    counter=$((counter + 1))
    
    if [ $counter -ge 6 ]; then
        echo "[$TIMESTAMP] ✅ All web apps healthy (3000, 3003, 3005)" >> "$LOG_FILE"
        counter=0
    fi
    
    echo "$counter" > /tmp/web-monitor-counter
fi