ARG NODE_VERSION=22

# ── Stage 1: Build ──────────────────────────────────────────────
FROM node:${NODE_VERSION}-slim AS build

WORKDIR /app

# Install dependencies first (cache layer)
COPY package.json package-lock.json ./
RUN --mount=type=cache,target=/root/.npm \
    npm ci

# Copy source and build
COPY . .
ENV ASTRO_TELEMETRY_DISABLED=1
RUN npm run build

# ── Stage 2: Production ────────────────────────────────────────
FROM caddy:2-alpine AS production

COPY --from=build /app/dist /srv
COPY <<'CADDYFILE' /etc/caddy/Caddyfile
:3000 {
	root * /srv
	file_server
	try_files {path} {path}/ /404.html
	encode gzip

	header {
		X-Content-Type-Options nosniff
		X-Frame-Options DENY
		Referrer-Policy strict-origin-when-cross-origin
		Cache-Control "no-cache"
	}

	header /_astro/* {
		Cache-Control "public, max-age=31536000, immutable"
	}
}
CADDYFILE

EXPOSE 3000

HEALTHCHECK --interval=30s --timeout=3s --start-period=5s \
    CMD wget -qO- http://127.0.0.1:3000/ || exit 1

# ── Stage 3: Development ───────────────────────────────────────
FROM node:${NODE_VERSION}-slim AS development

WORKDIR /app

COPY package.json package-lock.json ./
RUN --mount=type=cache,target=/root/.npm \
    npm ci

COPY . .

ENV ASTRO_TELEMETRY_DISABLED=1

EXPOSE 3000

CMD ["npm", "run", "dev"]