#!/bin/bash
# =============================================================================
# Aula 12 - Cleanup Victoria Metrics
# =============================================================================
#
# Remove Victoria Metrics stack via ArgoCD
#
# =============================================================================

set -e

# Cores para output
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# Funções de log
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}[ERROR]${NC} $1"; }

# Diretório do script
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
ENV_FILE="${SCRIPT_DIR}/.env"

# Carregar configuração
if [[ -f "$ENV_FILE" ]]; then
    source "$ENV_FILE"
fi

echo ""
echo "=========================================="
echo "   Cleanup Victoria Metrics"
echo "=========================================="
echo ""
echo "Este script irá remover:"
echo "  - ArgoCD Application 'monitoring'"
echo "  - Todos os recursos no namespace 'monitoring'"
echo "  - Secret do repositório no ArgoCD"
echo ""
echo "ATENÇÃO: Dados de métricas serão PERDIDOS!"
echo ""
read -p "Continuar? [y/N]: " CONFIRM

if [[ "$CONFIRM" != "y" && "$CONFIRM" != "Y" ]]; then
    log_info "Cancelado pelo usuário"
    exit 0
fi

# =============================================================================
# REMOVER ARGOCD APPLICATION
# =============================================================================

log_info "Removendo ArgoCD Application..."

if kubectl get application monitoring -n argocd &> /dev/null; then
    # Remover finalizers para permitir deleção
    kubectl patch application monitoring -n argocd \
        --type json \
        --patch='[{"op": "remove", "path": "/metadata/finalizers"}]' 2>/dev/null || true

    kubectl delete application monitoring -n argocd --wait=false
    log_success "ArgoCD Application removida"
else
    log_info "ArgoCD Application já não existe"
fi

# Aguardar recursos serem deletados pelo ArgoCD
log_info "Aguardando ArgoCD deletar recursos..."
sleep 5

# =============================================================================
# REMOVER NAMESPACE
# =============================================================================

log_info "Removendo namespace 'monitoring'..."

if kubectl get namespace monitoring &> /dev/null; then
    # Forçar remoção de recursos se necessário
    kubectl delete all --all -n monitoring --timeout=60s 2>/dev/null || true
    kubectl delete pvc --all -n monitoring --timeout=60s 2>/dev/null || true
    kubectl delete configmap --all -n monitoring --timeout=60s 2>/dev/null || true
    kubectl delete secret --all -n monitoring --timeout=60s 2>/dev/null || true

    kubectl delete namespace monitoring --timeout=120s 2>/dev/null || {
        log_warn "Timeout deletando namespace, forçando..."
        kubectl get namespace monitoring -o json | \
            jq '.spec.finalizers = []' | \
            kubectl replace --raw "/api/v1/namespaces/monitoring/finalize" -f - 2>/dev/null || true
    }
    log_success "Namespace 'monitoring' removido"
else
    log_info "Namespace 'monitoring' já não existe"
fi

# =============================================================================
# REMOVER SECRET DO REPOSITÓRIO
# =============================================================================

log_info "Removendo secret do repositório..."

if kubectl get secret factory-monitoring-repo -n argocd &> /dev/null; then
    kubectl delete secret factory-monitoring-repo -n argocd
    log_success "Secret do repositório removido"
else
    log_info "Secret do repositório já não existe"
fi

# =============================================================================
# REMOVER PROJETO GITLAB (OPCIONAL)
# =============================================================================

if [[ -n "$GITLAB_HOST" && -n "$GITLAB_TOKEN" ]]; then
    echo ""
    read -p "Remover projeto 'factory/monitoring' do GitLab? [y/N]: " REMOVE_PROJECT

    if [[ "$REMOVE_PROJECT" == "y" || "$REMOVE_PROJECT" == "Y" ]]; then
        log_info "Removendo projeto do GitLab..."

        # Obter ID do projeto
        PROJECT_RESPONSE=$(curl -s --header "PRIVATE-TOKEN: ${GITLAB_TOKEN}" \
            "https://${GITLAB_HOST}/api/v4/projects/factory%2Fmonitoring")

        PROJECT_ID=$(echo "$PROJECT_RESPONSE" | grep -o '"id":[0-9]*' | head -1 | cut -d: -f2)

        if [[ -n "$PROJECT_ID" ]]; then
            curl -s --request DELETE --header "PRIVATE-TOKEN: ${GITLAB_TOKEN}" \
                "https://${GITLAB_HOST}/api/v4/projects/${PROJECT_ID}"
            log_success "Projeto removido do GitLab"
        else
            log_info "Projeto não encontrado no GitLab"
        fi
    fi
fi

# =============================================================================
# LIMPAR ARQUIVO .ENV
# =============================================================================

echo ""
read -p "Remover arquivo de configuração local (.env)? [y/N]: " REMOVE_ENV

if [[ "$REMOVE_ENV" == "y" || "$REMOVE_ENV" == "Y" ]]; then
    rm -f "$ENV_FILE"
    log_success "Arquivo .env removido"
fi

# =============================================================================
# FINALIZAÇÃO
# =============================================================================

echo ""
echo "=========================================="
echo "   Cleanup Concluído!"
echo "=========================================="
echo ""
echo "Recursos removidos:"
echo "  - ArgoCD Application 'monitoring'"
echo "  - Namespace 'monitoring'"
echo "  - Secret do repositório no ArgoCD"
echo ""
echo "Para reinstalar:"
echo "  ./setup.sh"
echo ""