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

ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd -P)"
TMPDIR_TEST="$(mktemp -d)"
PIDS=()

cleanup() {
  for pid in "${PIDS[@]}"; do kill "$pid" 2>/dev/null || true; done
  rm -rf "$TMPDIR_TEST"
}
trap cleanup EXIT INT TERM

free_port() {
  node -e 'const server = require("node:net").createServer(); server.listen(0, "127.0.0.1", () => { console.log(server.address().port); server.close(); });'
}

backend_port_file="$TMPDIR_TEST/backend-port"
node -e '
const Fastify = require(process.argv[1]);
const fs = require("node:fs");
const app = Fastify();
app.get("/health", async (request) => ({ backend: "fastify", path: request.raw.url }));
app.listen({ port: 0, host: "127.0.0.1" }).then((address) => {
  fs.writeFileSync(process.argv[2], String(new URL(address).port));
});
' "$ROOT/backend/node_modules/fastify" "$backend_port_file" >"$TMPDIR_TEST/backend.log" 2>&1 &
PIDS+=("$!")

for _ in {1..50}; do
  [ -s "$backend_port_file" ] && break
  sleep 0.1
done
[ -s "$backend_port_file" ] || { cat "$TMPDIR_TEST/backend.log" >&2; exit 1; }
backend_port="$(<"$backend_port_file")"
frontend_port="$(free_port)"

THT_FRONTEND_API_UPSTREAM="http://127.0.0.1:$backend_port" \
  npm --prefix "$ROOT/frontend" run dev -- --host 127.0.0.1 --port "$frontend_port" \
  >"$TMPDIR_TEST/vite.log" 2>&1 &
PIDS+=("$!")

response=""
for _ in {1..50}; do
  if response="$(curl -fsS "http://127.0.0.1:$frontend_port/api/health" 2>/dev/null)"; then
    break
  fi
  sleep 0.1
done

if [ "$response" != '{"backend":"fastify","path":"/health"}' ]; then
  cat "$TMPDIR_TEST/vite.log" >&2
  printf 'expected Vite /api/health to reach Fastify /health, got: %s\n' "$response" >&2
  exit 1
fi

if ! rg -Fq -- '-f "$ROOT/compose.yaml" -f "$ROOT/deploy/compose.local.yaml" up --build "$@"' "$ROOT/scripts/run-stack.sh"; then
  echo "run-stack.sh must start the base+local Compose stack" >&2
  exit 1
fi

if rg -q 'command -v pi|PI_BIN="pi"|PI_BIN=pi' "$ROOT/scripts/run-stack.sh"; then
  echo "run-stack.sh must not require a host Pi binary" >&2
  exit 1
fi

echo "local browser /api routes to Fastify through the Vite proxy: ok"