# Multi-stage build: bun for installs (fast), node for build + runtime.
# No BuildKit type=cache mounts: they don't persist across builds on this daemon
# (Docker 29 + containerd image store), and bun install is fast enough (~3s cold)
# that cross-build tarball caching isn't worth the complexity.
FROM oven/bun:1.4.2-alpine AS deps
WORKDIR /app
COPY package.json bun.lock ./
RUN bun install --frozen-lockfile

# Production dependencies only — devDeps (typescript, vitest, @types) are build-time only.
FROM oven/bun:1.4.2-alpine AS prod-deps
WORKDIR /app
COPY package.json bun.lock ./
RUN bun install --production --frozen-lockfile

FROM node:22-alpine AS build
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
ENV NEXT_TELEMETRY_DISABLED=1
RUN npm run build

# No `output: 'standalone'`: the runtime stage keeps node_modules because
# /api/mlworker/[file] reads maplibre-gl dist files from disk at runtime, and
# /api/airports reads data/*.csv — both resolved relative to process.cwd().
FROM node:22-alpine AS runtime
WORKDIR /app
ENV NODE_ENV=production NEXT_TELEMETRY_DISABLED=1
COPY --from=prod-deps /app/node_modules ./node_modules
COPY --from=build /app/.next ./.next
COPY --from=build /app/package.json ./package.json
COPY --from=build /app/data ./data
# No public/ in the image: the generated map-asset pack (~100 MB, not in git) is
# volume-mounted by docker-compose as ./public → /app/public; without it the app
# falls back to remote openfreemap.org styles at runtime.
EXPOSE 3000
CMD ["npm", "run", "start"]