#!/bin/bash

PORT=4200
# Get absolute path to script
SCRIPT_PATH="$(readlink -f "$0")"
# Get directory containing the script
SCRIPT_DIR="$(dirname "$SCRIPT_PATH")"
# Set project directory
PROJECT_DIR="$SCRIPT_DIR"

LOG_FILE="$PROJECT_DIR/startup.log"

# Function to log messages
log() {
  echo "[$(date '+%Y-%m-%d %H:%M:%S')] $1" | tee -a "$LOG_FILE"
}

# Navigate to the project directory
cd "$PROJECT_DIR" || {
  log "Failed to navigate to project directory. Exiting."
  exit 1
}

log "Starting NextJS application..."

# Check if Node.js is installed
if ! command -v node &> /dev/null; then
  log "Node.js is not installed. Please install Node.js and try again."
  exit 1
fi

# Check if yarn or npm is installed
if command -v yarn &> /dev/null; then
  PKG_MANAGER="yarn"
elif command -v npm &> /dev/null; then
  PKG_MANAGER="npm"
else
  log "Neither yarn nor npm is installed. Please install a package manager and try again."
  exit 1
fi

log "Using $PKG_MANAGER as package manager"

# Install dependencies if node_modules doesn't exist
if [ ! -d "node_modules" ]; then
  log "Installing dependencies..."
  if [ "$PKG_MANAGER" = "yarn" ]; then
    yarn install
  else
    npm install
  fi

  if [ $? -ne 0 ]; then
    log "Failed to install dependencies. Exiting."
    exit 1
  fi
  log "Dependencies installed successfully"
fi

# Build the application
log "Building the application..."
if [ "$PKG_MANAGER" = "yarn" ]; then
  yarn build
else
  npm run build
fi

if [ $? -ne 0 ]; then
  log "Build failed. Exiting."
  exit 1
fi
log "Build completed successfully"

# Check if the PORT environment variable is set
if [ -z "$PORT" ]; then
  PORT=3000
  log "PORT not specified, using default port $PORT"
else
  log "Using port $PORT"
fi

# Start the application
log "Starting the application on port $PORT..."
if [ "$PKG_MANAGER" = "yarn" ]; then
  PORT=$PORT yarn start
else
  PORT=$PORT npm start
fi

# This part will only be reached if the application crashes
log "Application terminated unexpectedly or killed."
exit 1