FROM node:23-alpine AS base

# Install dependencies only when needed
FROM base AS deps
RUN apk add --no-cache libc6-compat
WORKDIR /app

# Copy package files
COPY package.json package-lock.json* pnpm-lock.yaml* ./
RUN npm ci

# Build the UI
FROM base AS builder
WORKDIR /app
COPY --from=deps /app/node_modules ./node_modules
COPY . .

# Accept build arguments for environment variables
ARG NEXT_PUBLIC_API_URL

# Create .env.local for Next.js with build arguments
RUN echo "NEXT_PUBLIC_API_URL=${NEXT_PUBLIC_API_URL}" > .env.local && \
    echo "Using NEXT_PUBLIC_API_URL: ${NEXT_PUBLIC_API_URL}"

# Set production environment
ENV NODE_ENV=production
ENV NEXT_TELEMETRY_DISABLED=1

# Build the application
RUN npm run build && \
    echo "UI build completed at $(date)"

# Use the builder stage as the final stage
FROM node:23-alpine
WORKDIR /app
COPY --from=builder /app/out /app/built
CMD ["sh", "-c", "mkdir -p /output && cp -r /app/built/. /output/ && echo 'UI build copied to mounted volume' && ls -la /output/ && echo 'UI built and ready' && tail -f /dev/null"]