#!/usr/bin/env bash
# test-scenario-b.sh — Scenario B: IAM swap (KeyCape -> Keycloak, same LLDAP directory).
#
# Exports the canonical directory, transforms it into a Keycloak realm, starts
# Keycloak over that realm, and runs the external conformance suite against it.
#
# Prerequisites: docker, docker compose, and `make -C src build` (root `make build` only compiles; the src target installs into bin/).

set -euo pipefail

REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
cd "$REPO_ROOT"

BUILD_DIR="$REPO_ROOT/build/scenario-b"
COMPOSE="docker compose -f docker-compose.scenario-b.yml"
ISSUER_URL="http://localhost:8080/realms/netkingdom"

die() { echo "scenario-b: $*" >&2; exit 1; }

# Check every prerequisite up front: failing half way through leaves a running
# stack and a half-written realm, which is harder to diagnose than not starting.
for binary in lldap-export keycape-to-keycloak; do
  [ -x "bin/$binary" ] || die "bin/$binary is missing; run 'make -C src build' first"
done
command -v docker >/dev/null || die "docker is not installed"
command -v go >/dev/null || die "go is not installed"

cleanup() { $COMPOSE down -v >/dev/null 2>&1 || true; }
trap cleanup EXIT

mkdir -p "$BUILD_DIR/realm"

echo "=== Scenario B: IAM replacement ==="

echo "--- Step 1: start the directory ---"
$COMPOSE up -d lldap
timeout 120 bash -c 'until (exec 3<>/dev/tcp/127.0.0.1/3890) 2>/dev/null; do sleep 2; done' \
  || die "LLDAP did not accept connections within 120s"

echo "--- Step 2: export the canonical directory ---"
./bin/lldap-export \
  --url "${LLDAP_URL:-ldap://localhost:3890}" \
  --bind-dn "${LLDAP_BIND_DN:-cn=admin,ou=people,dc=netkingdom,dc=local}" \
  --bind-pw "${LLDAP_BIND_PW:-adminpassword}" \
  --base-dn "${LLDAP_BASE_DN:-dc=netkingdom,dc=local}" \
  --output "$BUILD_DIR/canonical-export.yaml"

echo "--- Step 3: transform into a Keycloak realm ---"
./bin/keycape-to-keycloak \
  --input "$BUILD_DIR/canonical-export.yaml" \
  --realm netkingdom \
  --issuer "${ISSUER:-$ISSUER_URL}" \
  --output "$BUILD_DIR/realm/netkingdom-realm.json"

echo "--- Step 4: start Keycloak over the migrated realm ---"
$COMPOSE up -d keycloak
timeout 180 bash -c "until curl -sf '$ISSUER_URL/.well-known/openid-configuration' >/dev/null; do sleep 3; done" \
  || die "Keycloak did not serve discovery within 180s"

echo "--- Step 5: run the external conformance suite against Keycloak ---"
# The suite reads KEYCAPE_TEST_ISSUER and talks to the running issuer over HTTP.
# Run it from the module directory: the Go module root is src/, not the repo root.
KEYCAPE_TEST_ISSUER="$ISSUER_URL" \
  go -C src test ./tests/conformance/... -v -count=1

echo "=== Scenario B PASSED ==="
echo "Note: this proves the migrated realm serves a conforming OIDC surface."
echo "It does not prove credential, MFA or relying-party behaviour was preserved."