#!/usr/bin/env bash
# Cloudflare DNS: it-api.sankofa.nexus → PUBLIC_IP (A record, proxied).
# Pair with scripts/nginx-proxy-manager/upsert-it-read-api-proxy-host.sh (NPM upstream r630-01:8787).
#
# Usage: bash scripts/cloudflare/add-it-api-sankofa-dns.sh [--dry-run]
set -euo pipefail

SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
PROJECT_ROOT="$(cd "$SCRIPT_DIR/../.." && pwd)"
cd "$PROJECT_ROOT"
source config/ip-addresses.conf 2>/dev/null || true
[ -f .env ] && set +u && source .env 2>/dev/null || true && set -u

ZONE_ID="${CLOUDFLARE_ZONE_ID_SANKOFA_NEXUS:-}"
PUBLIC_IP="${PUBLIC_IP:-76.53.10.36}"
NAME="${IT_READ_API_DNS_NAME:-it-api}"
DRY=false
[[ "${1:-}" == "--dry-run" ]] && DRY=true

if [ -n "${CLOUDFLARE_API_TOKEN:-}" ]; then
  AUTH_H=(-H "Authorization: Bearer $CLOUDFLARE_API_TOKEN")
elif [ -n "${CLOUDFLARE_API_KEY:-}" ] && [ -n "${CLOUDFLARE_EMAIL:-}" ]; then
  AUTH_H=(-H "X-Auth-Email: $CLOUDFLARE_EMAIL" -H "X-Auth-Key: $CLOUDFLARE_API_KEY")
else
  echo "Set CLOUDFLARE_API_TOKEN or (CLOUDFLARE_EMAIL + CLOUDFLARE_API_KEY) in .env" >&2
  exit 1
fi

[ -z "$ZONE_ID" ] && { echo "Set CLOUDFLARE_ZONE_ID_SANKOFA_NEXUS in .env" >&2; exit 1; }

FQDN="${NAME}.sankofa.nexus"
echo "DNS ${FQDN} → ${PUBLIC_IP} (zone sankofa.nexus)"

DATA=$(jq -n --arg name "$NAME" --arg content "$PUBLIC_IP" \
  '{type:"A",name:$name,content:$content,ttl:1,proxied:true}')

if $DRY; then
  echo "[dry-run] would POST/PUT Cloudflare record"
  exit 0
fi

EXISTING=$(curl -s -X GET "https://api.cloudflare.com/client/v4/zones/${ZONE_ID}/dns_records?name=${FQDN}" \
  "${AUTH_H[@]}" -H "Content-Type: application/json")
RECORD_ID=$(echo "$EXISTING" | jq -r '.result[0].id // empty')

if [ -n "$RECORD_ID" ] && [ "$RECORD_ID" != "null" ]; then
  UPD=$(curl -s -X PUT "https://api.cloudflare.com/client/v4/zones/${ZONE_ID}/dns_records/${RECORD_ID}" \
    "${AUTH_H[@]}" -H "Content-Type: application/json" -d "$DATA")
  echo "$UPD" | jq -e '.success == true' >/dev/null 2>&1 && echo "Updated ${FQDN}" || { echo "$UPD" | jq . >&2; exit 1; }
else
  CR=$(curl -s -X POST "https://api.cloudflare.com/client/v4/zones/${ZONE_ID}/dns_records" \
    "${AUTH_H[@]}" -H "Content-Type: application/json" -d "$DATA")
  echo "$CR" | jq -e '.success == true' >/dev/null 2>&1 && echo "Created ${FQDN}" || { echo "$CR" | jq . >&2; exit 1; }
fi