#!/bin/bash
# =============================================================================
# Cleanup da Aula 09 - Remove n8n e clientes
# =============================================================================
#
# Este script remove:
#   - n8n principal (namespace n8n)
#   - Todos os clientes (namespaces *-n8n)
#   - cert-manager (se instalado por esta aula)
#   - Arquivo .env
#
# NÃO remove (gerenciados pela aula-08):
#   - NGINX Ingress Controller
#   - Hetzner CSI Driver
#   - LoadBalancer
#
# =============================================================================

set -e

# Cores para output
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 "${CYAN}  Cleanup - Aula 09 (n8n)${NC}"
echo -e "${CYAN}============================================${NC}"
echo ""

log_warn "ATENÇÃO: Isso vai remover os recursos da aula 09:"
echo "  - n8n principal e todos os clientes"
echo "  - Volumes persistentes (PostgreSQL, Redis, n8n)"
echo "  - cert-manager (se instalado)"
echo "  - Arquivo .env"
echo ""
echo "Mantido (aula-08):"
echo "  - NGINX Ingress Controller"
echo "  - Hetzner CSI Driver"
echo "  - LoadBalancer"
echo ""
read -p "Continuar? (digite 'sim' para confirmar): " confirm

if [ "$confirm" != "sim" ]; then
    log_info "Operação cancelada"
    exit 0
fi

echo ""

# =============================================================================
# 1. REMOVER n8n PRINCIPAL
# =============================================================================

log_info "=== Removendo n8n principal ==="

if helm status n8n -n n8n &> /dev/null; then
    log_info "Removendo Helm release n8n..."
    helm uninstall n8n -n n8n --wait 2>/dev/null || true
    log_success "n8n removido"
else
    log_info "n8n não está instalado"
fi

# Remover PVCs
if kubectl get pvc -n n8n &> /dev/null 2>&1; then
    log_info "Removendo PVCs do namespace n8n..."
    kubectl delete pvc --all -n n8n --wait=false 2>/dev/null || true
fi

# Remover namespace
if kubectl get namespace n8n &> /dev/null; then
    log_info "Removendo namespace n8n..."
    kubectl delete namespace n8n --wait=false 2>/dev/null || true
    log_success "Namespace n8n removido"
fi

# =============================================================================
# 2. REMOVER CLIENTES (namespaces *-n8n)
# =============================================================================

log_info "=== Removendo clientes ==="

CLIENT_NAMESPACES=$(kubectl get namespaces -o name 2>/dev/null | grep -E ".*-n8n$" | sed 's/namespace\///' || true)

if [ -n "$CLIENT_NAMESPACES" ]; then
    for ns in $CLIENT_NAMESPACES; do
        log_info "Removendo cliente: $ns"

        # Remover helm release
        RELEASE_NAME=$(echo "$ns" | sed 's/-n8n$//')
        helm uninstall "${RELEASE_NAME}-n8n" -n "$ns" --wait 2>/dev/null || true

        # Remover PVCs
        kubectl delete pvc --all -n "$ns" --wait=false 2>/dev/null || true

        # Remover namespace
        kubectl delete namespace "$ns" --wait=false 2>/dev/null || true

        log_success "Cliente $ns removido"
    done
else
    log_info "Nenhum cliente encontrado"
fi

# =============================================================================
# 3. REMOVER CERT-MANAGER (se instalado)
# =============================================================================

log_info "=== Verificando cert-manager ==="

if helm status cert-manager -n cert-manager &> /dev/null; then
    log_info "Removendo cert-manager..."

    # Remover ClusterIssuer primeiro
    kubectl delete clusterissuer --all 2>/dev/null || true

    # Remover helm release
    helm uninstall cert-manager -n cert-manager --wait 2>/dev/null || true

    # Remover CRDs
    kubectl delete crd \
        certificates.cert-manager.io \
        certificaterequests.cert-manager.io \
        challenges.acme.cert-manager.io \
        clusterissuers.cert-manager.io \
        issuers.cert-manager.io \
        orders.acme.cert-manager.io \
        2>/dev/null || true

    # Remover namespace
    kubectl delete namespace cert-manager --wait=false 2>/dev/null || true

    log_success "cert-manager removido"
else
    log_info "cert-manager não está instalado"
fi

# =============================================================================
# 4. REMOVER ARQUIVO .env
# =============================================================================

log_info "=== Removendo arquivo de configuração ==="

if [ -f "$SCRIPT_DIR/.env" ]; then
    rm -f "$SCRIPT_DIR/.env"
    log_success "Arquivo .env removido"
else
    log_info "Arquivo .env não existe"
fi

# =============================================================================
# RESUMO
# =============================================================================

echo ""
echo -e "${CYAN}============================================${NC}"
echo -e "${GREEN}  Cleanup Concluído!${NC}"
echo -e "${CYAN}============================================${NC}"
echo ""
echo "Removido:"
echo "  - n8n principal e clientes"
echo "  - cert-manager (se existia)"
echo "  - Arquivo .env"
echo ""
echo "Mantido (aula-08):"
echo "  - NGINX Ingress Controller"
echo "  - Hetzner CSI Driver"
echo "  - LoadBalancer"
echo "  - Cluster Kubernetes"
echo ""
log_warn "Volumes Hetzner podem demorar alguns minutos para serem"
log_warn "completamente removidos. Verifique no painel da Hetzner."
echo ""