#!/bin/bash
#
# WebRTC Latency Test POC - Stop Script
# Stops the WebRTC server
#

set -e

SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"

GREEN='\033[0;32m'
YELLOW='\033[1;33m'
RED='\033[0;31m'
CYAN='\033[0;36m'
NC='\033[0m'

success() { echo -e "${GREEN}✓${NC} $1"; }
warn() { echo -e "${YELLOW}⚠${NC} $1"; }
error() { echo -e "${RED}✗${NC} $1"; }
header() { echo -e "\n${CYAN}$1${NC}"; }

PID_FILE="/tmp/webrtc-server.pid"
PORT=9000

echo ""
echo "╔══════════════════════════════════════════════════════════════╗"
echo "║          WEBRTC LATENCY TEST - STOP SERVER                    ║"
echo "╚══════════════════════════════════════════════════════════════╝"
echo ""

# ============================================================
# CHECK IF SERVER IS RUNNING
# ============================================================
header "Checking server status..."

SERVER_RUNNING=false

# Check PID file
if [ -f "$PID_FILE" ]; then
    PID=$(cat "$PID_FILE")
    if ps -p "$PID" > /dev/null 2>&1; then
        echo "  Found server process (PID: $PID)"
        SERVER_RUNNING=true
    else
        warn "PID file exists but process not running (stale)"
        rm -f "$PID_FILE"
    fi
fi

# Also check for processes using the port
if lsof -Pi :$PORT -sTCP:LISTEN -t >/dev/null 2>&1; then
    echo "  Found process listening on port $PORT"
    SERVER_RUNNING=true
fi

if [ "$SERVER_RUNNING" = false ]; then
    echo ""
    echo "  ${YELLOW}Server is not running${NC}"
    echo ""
    exit 0
fi

# ============================================================
# STOP SERVER
# ============================================================
header "Stopping WebRTC server..."

# Kill by PID if available
if [ -f "$PID_FILE" ]; then
    PID=$(cat "$PID_FILE")
    if ps -p "$PID" > /dev/null 2>&1; then
        echo "  Stopping server (PID: $PID)..."
        kill $PID 2>/dev/null || true
        
        # Wait for process to stop
        for i in {1..5}; do
            if ! ps -p $PID > /dev/null 2>&1; then
                success "Server stopped"
                break
            fi
            sleep 1
        done
        
        # Force kill if still running
        if ps -p $PID > /dev/null 2>&1; then
            echo "  Force killing server..."
            kill -9 $PID 2>/dev/null || true
        fi
    fi
    rm -f "$PID_FILE"
fi

# Kill any webrtc-server processes
echo "  Killing webrtc-server processes..."
pkill -f "webrtc-server" 2>/dev/null || true

# Kill any process using the port
if lsof -Pi :$PORT -sTCP:LISTEN -t >/dev/null 2>&1; then
    echo "  Killing process using port $PORT..."
    lsof -ti :$PORT | xargs kill -9 2>/dev/null || true
fi

# Wait a moment
sleep 2

success "Server stopped"

# ============================================================
# VERIFY STOPPED
# ============================================================
header "Verifying..."

STILL_RUNNING=false

if lsof -Pi :$PORT -sTCP:LISTEN -t >/dev/null 2>&1; then
    error "Something is still listening on port $PORT"
    STILL_RUNNING=true
elif pgrep -f "webrtc-server" > /dev/null 2>&1; then
    error "Some webrtc-server processes still running"
    STILL_RUNNING=true
fi

if [ "$STILL_RUNNING" = false ]; then
    success "All processes stopped"
fi

# ============================================================
# DISPLAY LOG
# ============================================================
header "Last log entries"

LOG_FILE="/tmp/webrtc-server.log"
if [ -f "$LOG_FILE" ]; then
    tail -10 "$LOG_FILE" | sed 's/^/    /'
else
    echo "  No log file found"
fi

echo ""
success "Stop completed!"
echo ""