#!/bin/bash

###############################################################################
# LuckyChit Frontend Deployment Script
# Deploys Flutter Web App to Nginx
###############################################################################

set -e  # Exit on error

# Colors
GREEN='\033[0;32m'
BLUE='\033[0;34m'
RED='\033[0;31m'
YELLOW='\033[1;33m'
NC='\033[0m' # No Color

# Configuration
SERVER_IP="192.168.8.148"
API_URL="http://${SERVER_IP}:3000/api"
PROJECT_DIR="/home/luckychit/apps/chitfund/luckychit"
WEB_ROOT="/var/www/luckychit"
API_SERVICE_FILE="lib/core/services/api_service.dart"

print_info() {
    echo -e "${BLUE}ℹ️  $1${NC}"
}

print_success() {
    echo -e "${GREEN}✅ $1${NC}"
}

print_error() {
    echo -e "${RED}❌ $1${NC}"
}

print_header() {
    echo ""
    echo -e "${GREEN}╔════════════════════════════════════════════════════════╗${NC}"
    echo -e "${GREEN}║       LuckyChit Frontend Deployment Script            ║${NC}"
    echo -e "${GREEN}╚════════════════════════════════════════════════════════╝${NC}"
    echo ""
}

###############################################################################
# Main Deployment
###############################################################################

print_header

# Check if running as root
if [ "$EUID" -ne 0 ]; then
    print_error "Please run as root (sudo ./deploy-frontend.sh)"
    exit 1
fi

print_info "Deployment Configuration:"
echo "  Server IP: $SERVER_IP"
echo "  API URL: $API_URL"
echo "  Project Dir: $PROJECT_DIR"
echo "  Web Root: $WEB_ROOT"
echo ""
read -p "Continue with deployment? (y/n) " -n 1 -r
echo
if [[ ! $REPLY =~ ^[Yy]$ ]]; then
    print_error "Deployment cancelled"
    exit 1
fi

###############################################################################
# Step 1: Navigate to project directory
###############################################################################
print_info "Step 1/8: Navigating to project directory..."
cd $PROJECT_DIR
print_success "In directory: $(pwd)"

###############################################################################
# Step 2: Create backup of current API service
###############################################################################
print_info "Step 2/8: Creating backup of API service..."
if [ -f "$API_SERVICE_FILE" ]; then
    cp $API_SERVICE_FILE ${API_SERVICE_FILE}.backup
    print_success "Backup created: ${API_SERVICE_FILE}.backup"
else
    print_error "API service file not found: $API_SERVICE_FILE"
    exit 1
fi

###############################################################################
# Step 3: Update API URL
###############################################################################
print_info "Step 3/8: Updating API URL to $API_URL..."

# Replace localhost URL with server IP
sed -i "s|http://localhost:3000/api|$API_URL|g" $API_SERVICE_FILE

# Verify the change
if grep -q "$API_URL" $API_SERVICE_FILE; then
    print_success "API URL updated successfully"
else
    print_error "Failed to update API URL"
    exit 1
fi

###############################################################################
# Step 4: Update Flutter
###############################################################################
print_info "Step 4/8: Updating Flutter..."
cd /opt/flutter
git pull origin stable
flutter upgrade
print_success "Flutter updated: $(flutter --version | head -n 1)"

###############################################################################
# Step 5: Get dependencies
###############################################################################
print_info "Step 5/8: Getting Flutter dependencies..."
cd $PROJECT_DIR
flutter pub get
print_success "Dependencies installed"

###############################################################################
# Step 6: Build Flutter web app
###############################################################################
print_info "Step 6/8: Building Flutter web app..."
flutter build web --release --web-renderer html
print_success "Flutter web app built successfully"

###############################################################################
# Step 7: Deploy to web server
###############################################################################
print_info "Step 7/8: Deploying to web server..."

# Create web root if it doesn't exist
mkdir -p $WEB_ROOT

# Backup existing deployment
if [ -d "$WEB_ROOT" ] && [ "$(ls -A $WEB_ROOT)" ]; then
    BACKUP_DIR="${WEB_ROOT}_backup_$(date +%Y%m%d_%H%M%S)"
    print_info "Backing up existing deployment to $BACKUP_DIR"
    cp -r $WEB_ROOT $BACKUP_DIR
fi

# Copy new build
cp -r build/web/* $WEB_ROOT/

# Set proper permissions
chown -R www-data:www-data $WEB_ROOT
chmod -R 755 $WEB_ROOT

print_success "Deployed to $WEB_ROOT"

###############################################################################
# Step 8: Verify deployment
###############################################################################
print_info "Step 8/8: Verifying deployment..."

if [ -f "$WEB_ROOT/index.html" ]; then
    print_success "Deployment verified - index.html exists"
else
    print_error "Deployment failed - index.html not found"
    exit 1
fi

###############################################################################
# Cleanup
###############################################################################
print_info "Restoring original API service file for future builds..."
if [ -f "${API_SERVICE_FILE}.backup" ]; then
    mv ${API_SERVICE_FILE}.backup $API_SERVICE_FILE
    print_success "Original API service restored"
fi

###############################################################################
# Complete
###############################################################################
echo ""
echo -e "${GREEN}╔════════════════════════════════════════════════════════╗${NC}"
echo -e "${GREEN}║           Deployment Complete! 🎉                     ║${NC}"
echo -e "${GREEN}╚════════════════════════════════════════════════════════╝${NC}"
echo ""

print_success "Frontend deployed successfully!"
echo ""
print_info "Access your application at:"
echo "  🌐 http://$SERVER_IP"
echo ""
print_info "Backend API is at:"
echo "  🔌 http://$SERVER_IP:3000/api"
echo "  💚 Health: http://$SERVER_IP:3000/health"
echo ""
print_info "Next steps:"
echo "  1. Test the application in your browser"
echo "  2. Check backend is running: pm2 status"
echo "  3. View logs: pm2 logs luckychit-api"
echo ""
print_info "To rollback, use the backup at:"
echo "  $(ls -td ${WEB_ROOT}_backup_* 2>/dev/null | head -1)"
echo ""