set fallback := true

export VPA_NAMESPACE := env("VPA_NAMESPACE", "vpa")
export PROMETHEUS_NAMESPACE := env("PROMETHEUS_NAMESPACE", "monitoring")
export PROMETHEUS_ADDRESS := env("PROMETHEUS_ADDRESS", "http://kube-prometheus-stack-prometheus." + PROMETHEUS_NAMESPACE + ".svc:9090")

[private]
default:
    @just --list --unsorted --list-submodules

# Add Helm repository
add-helm-repo:
    helm repo add fairwinds-stable https://charts.fairwinds.com/stable
    helm repo update

# Remove Helm repository
remove-helm-repo:
    helm repo remove fairwinds-stable

# Create namespace
create-namespace:
    @kubectl get namespace ${VPA_NAMESPACE} &>/dev/null || \
        kubectl create namespace ${VPA_NAMESPACE}

# Delete namespace
delete-namespace:
    @kubectl delete namespace ${VPA_NAMESPACE} --ignore-not-found

# Install Vertical Pod Autoscaler
install:
    #!/bin/bash
    set -euo pipefail

    # Check if Prometheus is installed
    if ! helm status kube-prometheus-stack -n ${PROMETHEUS_NAMESPACE} &>/dev/null; then
        echo "Error: Prometheus (kube-prometheus-stack) is not installed."
        echo "Please install Prometheus first using: just prometheus::install"
        exit 1
    fi

    just add-helm-repo
    just create-namespace

    # Generate values.yaml from template
    gomplate -f values.gomplate.yaml -o values.yaml

    # Install VPA with Helm
    helm upgrade --install vpa fairwinds-stable/vpa --namespace ${VPA_NAMESPACE} \
        --values values.yaml --wait

    echo "VPA installed successfully in namespace: ${VPA_NAMESPACE}"
    echo ""
    echo "To verify installation:"
    echo "  kubectl get pods -n ${VPA_NAMESPACE}"
    echo "  kubectl get vpa -A"

# Uninstall Vertical Pod Autoscaler
uninstall:
    #!/bin/bash
    set -euo pipefail

    if ! helm status vpa -n ${VPA_NAMESPACE} &>/dev/null; then
        echo "VPA is not installed."
        exit 0
    fi

    if command -v gum &>/dev/null; then
        if ! gum confirm "Are you sure you want to uninstall VPA?"; then
            echo "Uninstall cancelled."
            exit 0
        fi
    else
        read -p "Are you sure you want to uninstall VPA? (y/N) " -n 1 -r
        echo
        if [[ ! $REPLY =~ ^[Yy]$ ]]; then
            echo "Uninstall cancelled."
            exit 0
        fi
    fi

    helm uninstall vpa -n ${VPA_NAMESPACE}

    # Delete VPA CRDs
    kubectl delete crd verticalpodautoscalercheckpoints.autoscaling.k8s.io --ignore-not-found
    kubectl delete crd verticalpodautoscalers.autoscaling.k8s.io --ignore-not-found

    just delete-namespace

    echo "VPA uninstalled successfully."