#!/bin/sh

# Author : NTT Data AG
# Date   : 11-05-2023

helm_install=false
app_name=""

# fetch helm resources
# docs: https://helm.sh/docs/intro/install/
install_helm () {
	# curl -fsSL -o get_helm.sh https://raw.githubusercontent.com/helm/helm/main/scripts/get-helm-3
	# chmod 700 get_helm.sh
	# ./get_helm.sh
    echo "Helm not support yet."
    exit 1
}

# install resources
# TODO: check if this works
install_k3s () {
    sudo dnf install -y container-selinux
	sudo dnf install -y https://rpm.rancher.io/k3s/stable/common/centos/8/noarch/k3s-selinux-1.2-2.el8.noarch.rpm

    get_k3s
}

# install k3s
# docs: https://docs.k3s.io/installation/configuration
get_k3s () {
	sudo curl -sfL https://get.k3s.io | INSTALL_K3S_SYMLINK="skip" K3S_KUBECONFIG_MODE="644" INSTALL_K3S_EXEC="--disable=traefik" sh -
	export KUBECONFIG=/etc/rancher/k3s/k3s.yaml
	kubectl get pods -A
}

# install git
install_git () {
    sudo dnf -y update
    sudo dnf -y install git
}

install_sock_shop () {
    git clone https://github.com/microservices-demo/microservices-demo.git
    cd microservices-demo/deploy/kubernetes
    kubectl create namespace sock-shop
    kubectl apply -f complete-demo.yaml
    echo "Getting Pods from sock-shop namespace"
    kubectl get pods -n sock-shop
    # TODO: create check if list with pods returns and if they are ready
}

show_help() {
    cat <<EOF
Usage: $0 [options]

Options:
  -h, --help           Show help information
  -m, --helm           Install Helm. Set flag when you want to install helm.
  -a, --app <app_name> Specify the app name
EOF
}

show_allowed_apps () {
    cat <<EOF
Supported apps:
    - socks_shop

EOF
}

while [ "$#" -gt 0 ]; do
    case "$1" in
        -h|--help)
            show_help
            exit 0
            ;;
        -m|--helm)
            helm_install=true
            shift
            ;;
        -a|--app)
            if [ "$2" ]; then
                app_name="$2"
                shift 2
            else
                echo "Error: Missing argument for $1 option"
                show_help
                exit 1
            fi
            ;;
        *)
            echo "Error: Unrecognized option $1"
            show_help
            exit 1
            ;;
    esac
done

# Validate app names
if [ -z "$app_name" ]; then
    echo "Please specify app"
else
    case $app_name in
        "sock_shop")
            echo "$app_name OK"
            ;;
        *)
            show_allowed_apps
            exit 1
            ;;
    esac
fi

# Check if --helm was set
if [ "$helm_install" = true ]; then
    install_helm
else
    echo "Skipping helm"
fi

echo "Installing GIT"
install_git

echo "Installing K3S"
install_k3s

echo "Installing $app_name"
install_sock_shop