FROM node:20-alpine AS base

# Metadata labels
LABEL maintainer="TFM aInventory Team"
LABEL version="2.0.0"
LABEL description="TFM aInventory Frontend Web Service"

# Step 1: Install dependencies
FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app
# We run this from the frontend folder context
COPY package.json package-lock.json* ./
RUN npm ci

# Step 2: Build the source code
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .
# Disable telemetry during build
ENV NEXT_TELEMETRY_DISABLED 1
RUN npm run build

# Step 3: Production image
FROM base AS runner
RUN apk add --no-cache su-exec curl
WORKDIR /app

ENV NODE_ENV production
ENV NEXT_TELEMETRY_DISABLED 1

# Add nextjs user
RUN addgroup --system --gid 1001 nodejs
RUN adduser --system --uid 1001 nextjs

# Copy standalone output
COPY --from=builder /app/public ./public
# Set proper permissions for the Next.js cache
RUN mkdir .next
RUN chown nextjs:nodejs .next

# Automatically leverage output traces to reduce image size
COPY --from=builder --chown=nextjs:nodejs /app/.next/standalone ./
COPY --from=builder --chown=nextjs:nodejs /app/.next/static ./.next/static

# Copy entrypoint script
COPY entrypoint.sh /app/entrypoint.sh
RUN chmod +x /app/entrypoint.sh

EXPOSE 3000
ENV PORT 3000
ENV HOSTNAME "0.0.0.0"

# Health check — verify frontend is responsive
HEALTHCHECK --interval=30s --timeout=10s --start-period=40s --retries=3 \
    CMD curl -f http://localhost:3000/ || exit 1

ENTRYPOINT ["/app/entrypoint.sh"]