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

SOURCE_ZIP=/input/source.zip
WORKSPACE=/tmp/workspace
OUTPUT=/output

mkdir -p "$WORKSPACE" "$OUTPUT"
unzip -q "$SOURCE_ZIP" -d "$WORKSPACE"

BACKEND_DIR=$(find "$WORKSPACE" -name pom.xml -not -path '*/node_modules/*' -printf '%h\n' | head -n 1)
FRONTEND_DIR=$(find "$WORKSPACE" -name package.json -not -path '*/node_modules/*' -printf '%h\n' | head -n 1 || true)

if [[ -z "${BACKEND_DIR:-}" ]]; then
  echo "Generated source has no Maven backend" | tee "$OUTPUT/error.log"
  exit 21
fi

(
  cd "$BACKEND_DIR"
  SERVER_PORT=8081 mvn -B -DskipTests spring-boot:run
) >"$OUTPUT/backend.log" 2>&1 &
BACKEND_PID=$!

READY_URL=http://127.0.0.1:8081
FRONTEND_PID=
if [[ -n "${FRONTEND_DIR:-}" ]]; then
  (
    cd "$FRONTEND_DIR"
    if [[ -f package-lock.json ]]; then npm ci; else npm install; fi
    VITE_APP_API_BASE_URL=http://127.0.0.1:8081 \
      VUE_APP_API_BASE_URL=http://127.0.0.1:8081 \
      npm run dev -- --host 0.0.0.0 --port 8080
  ) >"$OUTPUT/frontend.log" 2>&1 &
  FRONTEND_PID=$!
  READY_URL=http://127.0.0.1:8080
fi

for _ in $(seq 1 180); do
  if curl -fsS "$READY_URL" >/dev/null 2>&1; then
    break
  fi
  if ! kill -0 "$BACKEND_PID" 2>/dev/null; then
    echo "Backend exited before preview became ready" | tee "$OUTPUT/error.log"
    exit 22
  fi
  sleep 1
done

curl -fsS "$READY_URL" >/dev/null
chromium --headless --no-sandbox --disable-gpu --hide-scrollbars \
  --window-size=1440,900 --screenshot="$OUTPUT/screenshot.png" "$READY_URL" \
  >"$OUTPUT/screenshot.log" 2>&1
printf '{"status":"RUNNING","url":"%s"}\n' "$READY_URL" >"$OUTPUT/ready"

if [[ -n "${FRONTEND_PID:-}" ]]; then
  wait -n "$BACKEND_PID" "$FRONTEND_PID"
else
  wait "$BACKEND_PID"
fi