#!/bin/bash
# ============================================================================
# Aula 14 - Cleanup do Istio Traffic Splitting
# ============================================================================
# Remove todos os componentes instalados pelo setup.sh:
#   - Namespace istio (aplicação)
#   - Kiali, Jaeger (addons)
#   - Istio (istiod + base)
#   - Ingress resources
#
# Mantém:
#   - Cluster Kubernetes
#   - GitLab e Registry (aula-10)
#   - Outros namespaces
# ============================================================================

set -e

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
CYAN='\033[0;36m'
NC='\033[0m'

log_info() { echo -e "${BLUE}[INFO]${NC} $1"; }
log_success() { echo -e "${GREEN}[OK]${NC} $1"; }
log_warn() { echo -e "${YELLOW}[WARN]${NC} $1"; }
log_error() { echo -e "${RED}[ERRO]${NC} $1"; }

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

echo ""
echo -e "${CYAN}╔═══════════════════════════════════════════════════════════╗${NC}"
echo -e "${CYAN}║  Cleanup - Aula 14 Istio Traffic Splitting                ║${NC}"
echo -e "${CYAN}╚═══════════════════════════════════════════════════════════╝${NC}"
echo ""
echo -e "${YELLOW}Este script irá remover:${NC}"
echo "  - Namespace 'istio' com aplicação"
echo "  - Addons: Kiali, Jaeger"
echo "  - Istio: istiod e istio-base"
echo "  - Ingress do Kiali e Jaeger"
echo ""
read -p "Continuar? (digite 'sim' para confirmar): " confirm
if [[ "$confirm" != "sim" ]]; then
    log_info "Operação cancelada"
    exit 0
fi

echo ""

# Remover pod de teste
log_info "Removendo pod de teste..."
kubectl delete pod curl-test -n istio --ignore-not-found=true 2>/dev/null || true

# Remover namespace istio (aplicação demo)
if kubectl get namespace istio &> /dev/null; then
    log_info "Removendo namespace istio..."
    kubectl delete namespace istio --wait=false 2>/dev/null || true
    log_success "Namespace istio marcado para remoção"
else
    log_info "Namespace istio não encontrado"
fi

# Remover Ingress
log_info "Removendo Ingress..."
kubectl delete ingress kiali jaeger -n istio-system --ignore-not-found=true 2>/dev/null || true
log_success "Ingress removidos"

# Remover addons (Kiali, Jaeger)
log_info "Removendo Kiali..."
kubectl delete -f https://raw.githubusercontent.com/istio/istio/release-1.24/samples/addons/kiali.yaml 2>/dev/null || true

log_info "Removendo Jaeger..."
kubectl delete -f https://raw.githubusercontent.com/istio/istio/release-1.24/samples/addons/jaeger.yaml 2>/dev/null || true
log_success "Addons removidos"

# Remover istiod
if helm status istiod -n istio-system &> /dev/null; then
    log_info "Removendo istiod..."
    helm uninstall istiod -n istio-system --wait
    log_success "istiod removido"
else
    log_info "istiod não encontrado"
fi

# Remover istio-base
if helm status istio-base -n istio-system &> /dev/null; then
    log_info "Removendo istio-base..."
    helm uninstall istio-base -n istio-system --wait
    log_success "istio-base removido"
else
    log_info "istio-base não encontrado"
fi

# Remover namespace istio-system
if kubectl get namespace istio-system &> /dev/null; then
    log_info "Removendo namespace istio-system..."
    kubectl delete namespace istio-system --wait=false 2>/dev/null || true
    log_success "Namespace istio-system marcado para remoção"
fi

# Remover arquivo .env
echo ""
read -p "Remover arquivo .env? [s/N]: " remove_env
if [[ "$remove_env" == "s" || "$remove_env" == "S" ]]; then
    rm -f "${SCRIPT_DIR}/.env"
    log_success "Arquivo .env removido"
fi

echo ""
echo -e "${GREEN}Cleanup concluído.${NC}"
echo ""
echo "Aguarde alguns minutos para os namespaces serem removidos completamente."
echo "Verificar: kubectl get ns"
echo ""