#!/bin/bash
# scripts/deploy-staging.sh
# Gravl Staging Deployment Script
# Phase 10-07: Task 2 — Deploy All Services to Staging
#
# USAGE:
#   ./scripts/deploy-staging.sh [--context <kubectl-context>] [--dry-run]
#
# PREREQUISITES:
#   - kubectl installed and reachable
#   - kubeconfig with staging cluster context
#   - Staging namespace already configured (see setup-staging.sh)
#   - Docker images available (pushed to registry or local)

set -euo pipefail

CONTEXT="${KUBECTL_CONTEXT:-}"
DRY_RUN=false
K8S_DEPLOYMENTS_DIR="$(dirname "$0")/../k8s/deployments"
NAMESPACE="gravl-staging"

KUBECTL="kubectl"
[[ -n "$CONTEXT" ]] && KUBECTL="kubectl --context=$CONTEXT"
[[ "$DRY_RUN" == "true" ]] && KUBECTL="$KUBECTL --dry-run=client -o yaml"

echo "[INFO] Deploying Gravl services to ${NAMESPACE}..."

# Deploy PostgreSQL StatefulSet
echo "[INFO] Deploying PostgreSQL..."
sed "s/namespace: gravl-prod/namespace: ${NAMESPACE}/g" \
  "${K8S_DEPLOYMENTS_DIR}/postgresql.yaml" | \
  $KUBECTL apply -f -

# Deploy Backend Deployment (1 replica for staging)
echo "[INFO] Deploying backend..."
sed "s/namespace: gravl-prod/namespace: ${NAMESPACE}/g; s/replicas: 3/replicas: 1/g" \
  "${K8S_DEPLOYMENTS_DIR}/gravl-backend.yaml" | \
  $KUBECTL apply -f -

# Deploy Frontend Deployment (1 replica for staging)
echo "[INFO] Deploying frontend..."
sed "s/namespace: gravl-prod/namespace: ${NAMESPACE}/g; s/replicas: 3/replicas: 1/g" \
  "${K8S_DEPLOYMENTS_DIR}/gravl-frontend.yaml" | \
  $KUBECTL apply -f -

# Deploy Ingress
echo "[INFO] Deploying Ingress..."
grep -A 30 "namespace: gravl-staging" "${K8S_DEPLOYMENTS_DIR}/ingress-nginx.yaml" | \
  $KUBECTL apply -f -

echo "[OK] Staging deployment initiated"
echo "[INFO] Wait for pods: kubectl get pods -n ${NAMESPACE}"
echo "[INFO] View logs: kubectl logs -f -n ${NAMESPACE} -l app=gravl"