#!/usr/bin/env bash
set -euo pipefail

STAGING_ENV=${STAGING_ENV:-/var/lib/xiaoxia-saas-staging/.env}
PRODUCTION_DIR=${PRODUCTION_DIR:-/var/lib/xiaoxia-saas-production}
PRODUCTION_ENV=${PRODUCTION_ENV:-$PRODUCTION_DIR/.env}
GENERATED_DIR=${GENERATED_DIR:-$PRODUCTION_DIR/generated}
FORCE=${FORCE:-false}

if [ -e "$PRODUCTION_ENV" ] && [ "$FORCE" != "true" ]; then
  echo "ERROR: production env already exists: $PRODUCTION_ENV" >&2
  echo "Set FORCE=true only after manually reviewing the existing file." >&2
  exit 1
fi

mkdir -p "$PRODUCTION_DIR" "$GENERATED_DIR"
chmod 700 "$PRODUCTION_DIR"

get_staging_value() {
  key="$1"
  if [ -f "$STAGING_ENV" ]; then
    grep -E "^${key}=" "$STAGING_ENV" | tail -1 | cut -d= -f2- || true
  fi
}

random_secret() {
  python3 - <<'PY'
import secrets
print(secrets.token_urlsafe(48))
PY
}

OSS_ENDPOINT=${OSS_ENDPOINT:-$(get_staging_value OSS_ENDPOINT)}
OSS_BUCKET_NAME=${OSS_BUCKET_NAME:-$(get_staging_value OSS_BUCKET_NAME)}
OSS_ACCESS_KEY_ID=${OSS_ACCESS_KEY_ID:-$(get_staging_value OSS_ACCESS_KEY_ID)}
OSS_ACCESS_KEY_SECRET=${OSS_ACCESS_KEY_SECRET:-$(get_staging_value OSS_ACCESS_KEY_SECRET)}
JWT_SECRET_KEY=${JWT_SECRET_KEY:-$(random_secret)}

cat > "$PRODUCTION_ENV" <<EOF
APP_NAME=xiaoxia-saas
APP_VERSION=0.1.0
APP_ENV=production
ENVIRONMENT=production
DEBUG=false
AUTO_CREATE_SCHEMA=false
USE_IN_MEMORY_DB=false

ENV=production
API_PORT=8001
WEB_PORT=3000
PUBLIC_API_BASE_URL=https://api.xiaoxiajianji.com
GENERATED_FILES_HOST_DIR=$GENERATED_DIR

DATABASE_URL=postgresql+psycopg://xiaoxia:CHANGE_ME_PRODUCTION_DB_PASSWORD@xiaoxia-postgres-production:5432/xiaoxia_saas
REDIS_URL=redis://xiaoxia-redis-production:6379/0
CELERY_BROKER_URL=redis://xiaoxia-redis-production:6379/0
CELERY_RESULT_BACKEND=redis://xiaoxia-redis-production:6379/1
ENABLE_REDIS_SESSIONS=true

JWT_SECRET_KEY=$JWT_SECRET_KEY

ENABLE_EMAIL_DELIVERY=false
SMTP_HOST=
SMTP_PORT=587
SMTP_USER=
SMTP_PASSWORD=
SMTP_FROM_EMAIL=
SMTP_FROM_NAME=小虾 SaaS
SMTP_USE_TLS=true

OSS_ENDPOINT=$OSS_ENDPOINT
OSS_ACCESS_KEY_ID=$OSS_ACCESS_KEY_ID
OSS_ACCESS_KEY_SECRET=$OSS_ACCESS_KEY_SECRET
OSS_BUCKET_NAME=$OSS_BUCKET_NAME

CORS_ORIGINS_RAW=https://xiaoxiajianji.com,https://api.xiaoxiajianji.com
EOF

chmod 600 "$PRODUCTION_ENV"

echo "OK production env initialized: $PRODUCTION_ENV"
echo "NEXT: replace CHANGE_ME_PRODUCTION_DB_PASSWORD and provision xiaoxia-postgres-production/xiaoxia-redis-production before deployment."