FROM node:20-alpine AS base
WORKDIR /app

# ── 1. Install main project deps ─────────────────────────────────────────────
FROM base AS deps
COPY package.json package-lock.json ./
RUN npm install --legacy-peer-deps

# ── 2. Install studio deps ────────────────────────────────────────────────────
FROM base AS studio-deps
COPY studio/package.json studio/package-lock.json* ./
RUN npm install --legacy-peer-deps

# ── 3. Build Sanity Studio ────────────────────────────────────────────────────
FROM base AS studio-build
COPY --from=studio-deps /app/node_modules ./node_modules
COPY studio/ ./
ARG SANITY_STUDIO_PROJECT_ID
ARG SANITY_STUDIO_DATASET=production
ENV SANITY_STUDIO_PROJECT_ID=$SANITY_STUDIO_PROJECT_ID
ENV SANITY_STUDIO_DATASET=$SANITY_STUDIO_DATASET
RUN npm run build

# ── 4. Build Astro site (with studio output as static files) ──────────────────
FROM base AS build
COPY --from=deps /app/node_modules ./node_modules
COPY . .
COPY --from=studio-build /app/dist ./public/studio
# Remove index.html so /studio requests fall through to the SSR route,
# which rewrites /static/ asset paths to /studio/static/ before serving.
RUN rm -f ./public/studio/index.html
ARG SANITY_PROJECT_ID
ARG SANITY_DATASET=production
ARG SANITY_API_TOKEN
ENV SANITY_PROJECT_ID=$SANITY_PROJECT_ID
ENV SANITY_DATASET=$SANITY_DATASET
ENV SANITY_API_TOKEN=$SANITY_API_TOKEN
RUN npm run build

# ── 5. Runtime ────────────────────────────────────────────────────────────────
FROM node:20-alpine AS runtime
WORKDIR /app
COPY --from=build /app/dist ./dist
COPY --from=build /app/node_modules ./node_modules
ENV HOST=0.0.0.0
ENV PORT=4321
EXPOSE 4321
CMD ["node", "./dist/server/entry.mjs"]