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

. /vault/secrets/keycloak-admin-env.sh

KC_URL="http://keycloak.sso.svc.cluster.local"
REALM="atlas"
CLIENT_ID="endurain"
ROOT_URL="https://endurain.bstein.dev"
REDIRECT_URI="https://endurain.bstein.dev/api/v1/public/idp/callback/keycloak"
ISSUER_URL="https://sso.bstein.dev/realms/atlas"

ACCESS_TOKEN=""
for attempt in 1 2 3 4 5; do
  TOKEN_JSON="$(curl -sS -X POST "$KC_URL/realms/master/protocol/openid-connect/token" \
    -H 'Content-Type: application/x-www-form-urlencoded' \
    -d "grant_type=password" \
    -d "client_id=admin-cli" \
    -d "username=${KEYCLOAK_ADMIN}" \
    -d "password=${KEYCLOAK_ADMIN_PASSWORD}" || true)"
  ACCESS_TOKEN="$(echo "$TOKEN_JSON" | jq -r '.access_token' 2>/dev/null || true)"
  if [ -n "$ACCESS_TOKEN" ] && [ "$ACCESS_TOKEN" != "null" ]; then
    break
  fi
  echo "Keycloak token request failed (attempt ${attempt})" >&2
  sleep $((attempt * 2))
done
if [ -z "$ACCESS_TOKEN" ] || [ "$ACCESS_TOKEN" = "null" ]; then
  echo "Failed to fetch Keycloak admin token" >&2
  exit 1
fi

CLIENT_QUERY="$(curl -sS -H "Authorization: Bearer ${ACCESS_TOKEN}" \
  "$KC_URL/admin/realms/${REALM}/clients?clientId=${CLIENT_ID}" || true)"
CLIENT_UUID="$(echo "$CLIENT_QUERY" | jq -r '.[0].id' 2>/dev/null || true)"

if [ -z "$CLIENT_UUID" ] || [ "$CLIENT_UUID" = "null" ]; then
  create_payload="$(jq -nc \
    --arg client_id "${CLIENT_ID}" \
    --arg root_url "${ROOT_URL}" \
    --arg redirect_uri "${REDIRECT_URI}" \
    --arg web_origin "${ROOT_URL}" \
    '{clientId:$client_id,name:"Endurain",enabled:true,protocol:"openid-connect",publicClient:false,standardFlowEnabled:true,implicitFlowEnabled:false,directAccessGrantsEnabled:false,serviceAccountsEnabled:false,redirectUris:[$redirect_uri],webOrigins:[$web_origin],rootUrl:$root_url,baseUrl:"/"}')"
  status="$(curl -sS -o /dev/null -w "%{http_code}" -X POST \
    -H "Authorization: Bearer ${ACCESS_TOKEN}" \
    -H 'Content-Type: application/json' \
    -d "${create_payload}" \
    "$KC_URL/admin/realms/${REALM}/clients")"
  if [ "$status" != "201" ] && [ "$status" != "204" ]; then
    echo "Keycloak client create failed (status ${status})" >&2
    exit 1
  fi
  CLIENT_QUERY="$(curl -sS -H "Authorization: Bearer ${ACCESS_TOKEN}" \
    "$KC_URL/admin/realms/${REALM}/clients?clientId=${CLIENT_ID}" || true)"
  CLIENT_UUID="$(echo "$CLIENT_QUERY" | jq -r '.[0].id' 2>/dev/null || true)"
fi

if [ -z "$CLIENT_UUID" ] || [ "$CLIENT_UUID" = "null" ]; then
  echo "Keycloak client ${CLIENT_ID} not found" >&2
  exit 1
fi

CLIENT_SECRET="$(curl -sS -H "Authorization: Bearer ${ACCESS_TOKEN}" \
  "$KC_URL/admin/realms/${REALM}/clients/${CLIENT_UUID}/client-secret" | jq -r '.value' 2>/dev/null || true)"
if [ -z "$CLIENT_SECRET" ] || [ "$CLIENT_SECRET" = "null" ]; then
  echo "Keycloak client secret not found" >&2
  exit 1
fi

vault_addr="${VAULT_ADDR:-http://vault.vault.svc.cluster.local:8200}"
vault_role="${VAULT_ROLE:-sso-secrets}"
jwt="$(cat /var/run/secrets/kubernetes.io/serviceaccount/token)"
login_payload="$(jq -nc --arg jwt "${jwt}" --arg role "${vault_role}" '{jwt:$jwt, role:$role}')"
vault_token="$(curl -sS --request POST --data "${login_payload}" \
  "${vault_addr}/v1/auth/kubernetes/login" | jq -r '.auth.client_token')"
if [ -z "${vault_token}" ] || [ "${vault_token}" = "null" ]; then
  echo "vault login failed" >&2
  exit 1
fi

payload="$(jq -nc \
  --arg client_id "${CLIENT_ID}" \
  --arg client_secret "${CLIENT_SECRET}" \
  --arg issuer_url "${ISSUER_URL}" \
  '{data:{client_id:$client_id,client_secret:$client_secret,issuer_url:$issuer_url}}')"
curl -sS -X POST -H "X-Vault-Token: ${vault_token}" \
  -d "${payload}" "${vault_addr}/v1/kv/data/atlas/health/endurain-oidc" >/dev/null