# Stage 1: Install dependencies (cached if package-lock.json unchanged)
FROM node:24-alpine AS deps

WORKDIR /app

# Limit Node.js heap to avoid OOM in constrained CI environments
ENV NODE_OPTIONS="--max-old-space-size=1024"

# Copy package files first for better layer caching
COPY package.json package-lock.json* ./

RUN npm ci

# Stage 2: Run tests (fails the build if tests fail)
FROM deps AS test

COPY . .

RUN npx vitest run

# Stage 3: Build production bundle
FROM deps AS builder

COPY . .

# Skip tsc type-checking (vitest already validated); Vite transpiles via SWC
RUN npx vite build

# Stage 4: Serve with nginx
FROM nginx:alpine

# Remove default nginx static files
RUN rm -rf /usr/share/nginx/html/*

WORKDIR /app

COPY --from=builder /app/dist /usr/share/nginx/html
COPY --from=builder /app/nginx.conf /etc/nginx/conf.d/default.conf

EXPOSE 80
CMD ["nginx", "-g", "daemon off;"]