# Script to update Python requirements on all EC2 instances
#
# Usage:
#   .\update-requirements.ps1    # Updates requirements.txt and installs packages

Write-Host "Updating Python requirements on all instances..." -ForegroundColor Green

# Get instance IPs and IDs
. .\get-ips.ps1
$instanceIds = aws autoscaling describe-auto-scaling-groups --auto-scaling-group-names portfolio-manager-asg --query 'AutoScalingGroups[0].Instances[?HealthStatus==`Healthy`].InstanceId' --output text

if ($global:instances.Count -eq 0) {
    Write-Host "No instances found" -ForegroundColor Red
    exit 1
}

Write-Host "Found $($global:instances.Count) instances: $($global:instances -join ', ')" -ForegroundColor Green

# Generate a temporary SSH key for this session
Write-Host "Generating temporary SSH key..." -ForegroundColor Cyan
ssh-keygen -t rsa -f temp_req_key -N '""' -q

$instanceIdArray = $instanceIds -split "`t"

# Update each instance one at a time
for ($i = 0; $i -lt $global:instances.Count; $i++) {
    $ip = $global:instances[$i]
    $instanceId = $instanceIdArray[$i]
    
    Write-Host "Updating requirements on instance $instanceId ($ip)..." -ForegroundColor Yellow
    
    # Send SSH public key via EC2 Instance Connect
    Write-Host "Sending SSH key to $instanceId..."
    aws ec2-instance-connect send-ssh-public-key --instance-id $instanceId --instance-os-user ec2-user --ssh-public-key file://temp_req_key.pub
    
    if ($LASTEXITCODE -eq 0) {
        # Copy requirements.txt
        Write-Host "Copying requirements.txt to $ip..."
        scp -i temp_req_key -o StrictHostKeyChecking=no ".\requirements.txt" ec2-user@${ip}:/home/ec2-user/AWS_Portfolio_Manager/requirements.txt
        
        if ($LASTEXITCODE -eq 0) {
            Write-Host "Installing Python packages on $ip..."
            ssh -i temp_req_key -o StrictHostKeyChecking=no ec2-user@$ip "cd /home/ec2-user/AWS_Portfolio_Manager && ./venv/bin/pip install -r requirements.txt"
            
            if ($LASTEXITCODE -eq 0) {
                Write-Host "Requirements updated successfully on $ip" -ForegroundColor Green
                
                # Restart Streamlit service
                Write-Host "Restarting Streamlit service on $ip..."
                ssh -i temp_req_key -o StrictHostKeyChecking=no ec2-user@$ip "pkill -f 'streamlit run' && cd /home/ec2-user/AWS_Portfolio_Manager && nohup ./venv/bin/streamlit run application.py --server.port 5000 --server.address 0.0.0.0 > /dev/null 2>&1 &"
                
                if ($LASTEXITCODE -eq 0) {
                    Write-Host "Service restarted successfully on $ip" -ForegroundColor Green
                } else {
                    Write-Host "Failed to restart service on $ip" -ForegroundColor Red
                }
            } else {
                Write-Host "Failed to install packages on $ip" -ForegroundColor Red
            }
        } else {
            Write-Host "Failed to copy requirements.txt to $ip" -ForegroundColor Red
        }
    } else {
        Write-Host "Failed to send SSH key to $instanceId" -ForegroundColor Red
    }
    
    Write-Host "Waiting 3 seconds before next instance..." -ForegroundColor Cyan
    Start-Sleep -Seconds 3
}

# Clean up temporary key files
Remove-Item temp_req_key, temp_req_key.pub -ErrorAction SilentlyContinue

Write-Host "All instances updated with new requirements!" -ForegroundColor Green