# Frontend build stage
FROM oven/bun:1 AS frontend-builder

WORKDIR /app

# Copy frontend source code
COPY lightrag_webui/ ./lightrag_webui/

# Build frontend assets for inclusion in the API package
RUN cd lightrag_webui \
    && bun install --frozen-lockfile \
    && bun run build

# Python build stage
FROM python:3.12-slim AS builder

ENV DEBIAN_FRONTEND=noninteractive

WORKDIR /app

# Upgrade packaging tools and install system deps (Rust is required by some wheels)
RUN pip install --upgrade pip setuptools wheel \
    && apt-get update \
    && apt-get install -y --no-install-recommends \
        curl \
        build-essential \
        pkg-config \
    && rm -rf /var/lib/apt/lists/* \
    && curl --proto '=https' --tlsv1.2 -sSf https://sh.rustup.rs | sh -s -- -y

ENV PATH="/root/.cargo/bin:/root/.local/bin:${PATH}"

# Copy project metadata and sources
COPY pyproject.toml .
COPY setup.py .
COPY requirements-offline*.txt ./
COPY lightrag/ ./lightrag/

# Include pre-built frontend assets from the previous stage
COPY --from=frontend-builder /app/lightrag/api/webui ./lightrag/api/webui

# Install LightRAG with API extras and all offline dependencies
RUN pip install --user --no-cache-dir --use-pep517 .[api]
RUN pip install --user --no-cache-dir -r requirements-offline.txt

# Prepare offline cache directory and pre-populate tiktoken data
RUN mkdir -p /app/data/tiktoken \
    && lightrag-download-cache --cache-dir /app/data/tiktoken || status=$?; \
    if [ -n "${status:-}" ] && [ "$status" -ne 0 ] && [ "$status" -ne 2 ]; then exit "$status"; fi

# Final stage
FROM python:3.12-slim

WORKDIR /app

RUN pip install --upgrade pip setuptools wheel

# Copy installed packages and application code
COPY --from=builder /root/.local /root/.local
COPY --from=builder /app/lightrag ./lightrag
COPY pyproject.toml .
COPY setup.py .
COPY requirements-offline*.txt ./

# Ensure the installed scripts are on PATH
ENV PATH=/root/.local/bin:$PATH

# Install editable package for runtime (re-using cached wheels) and verify extras
# IMPORTANT: Must be done BEFORE creating data/ directory to avoid setuptools error
RUN pip install --no-cache-dir --use-pep517 ".[api]"
RUN pip install --no-cache-dir -r requirements-offline.txt

# Create persistent data directories AFTER package installation
RUN mkdir -p /app/data/rag_storage /app/data/inputs /app/data/tiktoken

# Copy offline cache into the newly created directory
COPY --from=builder /app/data/tiktoken /app/data/tiktoken

# Point to the prepared cache
ENV TIKTOKEN_CACHE_DIR=/app/data/tiktoken
ENV WORKING_DIR=/app/data/rag_storage
ENV INPUT_DIR=/app/data/inputs

# Expose API port
EXPOSE 9621

ENTRYPOINT ["python", "-m", "lightrag.api.lightrag_server"]