# Dockerfile for Foxhunt Monolithic HFT Trading System
# OPTIONAL - For development/testing only
# Production should run on bare metal for sub-50μs latency

#################################################################
# Build Stage - Multi-architecture support
#################################################################
FROM --platform=$BUILDPLATFORM rust:1.75-slim-bookworm AS builder

# Build arguments for cross-compilation
ARG TARGETPLATFORM
ARG BUILDPLATFORM
ARG TARGETOS
ARG TARGETARCH

# Install build dependencies
RUN apt-get update && apt-get install -y \
    pkg-config \
    libssl-dev \
    libpq-dev \
    ca-certificates \
    curl \
    build-essential \
    cmake \
    git \
    clang \
    llvm \
    && rm -rf /var/lib/apt/lists/*

# Install CUDA toolkit for GPU support (conditional)
RUN if [ "$TARGETARCH" = "amd64" ]; then \
    wget https://developer.download.nvidia.com/compute/cuda/repos/debian11/x86_64/cuda-keyring_1.0-1_all.deb && \
    dpkg -i cuda-keyring_1.0-1_all.deb && \
    apt-get update && \
    apt-get install -y cuda-toolkit-12-0 && \
    rm -rf /var/lib/apt/lists/* && \
    rm cuda-keyring_1.0-1_all.deb; \
    fi

# Setup Rust target for cross-compilation
RUN case "$TARGETARCH" in \
    "amd64") RUST_TARGET=x86_64-unknown-linux-gnu ;; \
    "arm64") RUST_TARGET=aarch64-unknown-linux-gnu ;; \
    *) echo "Unsupported architecture: $TARGETARCH" && exit 1 ;; \
    esac && \
    rustup target add $RUST_TARGET

# Create build user
RUN useradd -m -u 1000 builder

# Set working directory
WORKDIR /app

# Copy workspace configuration
COPY Cargo.toml Cargo.lock ./

# Copy all module Cargo.toml files for dependency resolution
COPY core/Cargo.toml ./core/
COPY ml/Cargo.toml ./ml/
COPY risk/Cargo.toml ./risk/
COPY data/Cargo.toml ./data/
COPY tli/Cargo.toml ./tli/

# Create dummy source files for dependency pre-compilation
RUN mkdir -p core/src ml/src risk/src data/src tli/src && \
    echo "pub fn main() {}" > core/src/lib.rs && \
    echo "pub fn main() {}" > ml/src/lib.rs && \
    echo "pub fn main() {}" > risk/src/lib.rs && \
    echo "pub fn main() {}" > data/src/lib.rs && \
    echo "fn main() {}" > tli/src/main.rs

# Pre-compile dependencies (cached layer)
RUN cargo build --release --workspace
RUN rm -rf core/src ml/src risk/src data/src tli/src target/release/.fingerprint/core-* target/release/.fingerprint/ml-* target/release/.fingerprint/risk-* target/release/.fingerprint/data-* target/release/.fingerprint/tli-*

# Copy actual source code
COPY . .

# Set target architecture for compilation
RUN case "$TARGETARCH" in \
    "amd64") RUST_TARGET=x86_64-unknown-linux-gnu ;; \
    "arm64") RUST_TARGET=aarch64-unknown-linux-gnu ;; \
    esac && \
    echo "Building for target: $RUST_TARGET"

# Build the monolithic trading system with performance optimizations
ENV RUSTFLAGS="-C target-cpu=native -C opt-level=3 -C lto=fat -C codegen-units=1"
RUN cargo build --release --bin tli

# Strip debug symbols for smaller binary
RUN strip target/release/tli

#################################################################
# Runtime Stage - Minimal, secure production image
#################################################################
FROM debian:bookworm-slim

# Install runtime dependencies
RUN apt-get update && apt-get install -y \
    ca-certificates \
    libssl3 \
    libpq5 \
    curl \
    htop \
    procps \
    net-tools \
    && rm -rf /var/lib/apt/lists/*

# Install NVIDIA runtime for GPU support (conditional)
RUN if command -v nvidia-smi > /dev/null 2>&1; then \
    distribution=$(. /etc/os-release;echo $ID$VERSION_ID) && \
    curl -s -L https://nvidia.github.io/nvidia-docker/gpgkey | apt-key add - && \
    curl -s -L https://nvidia.github.io/nvidia-docker/$distribution/nvidia-docker.list | tee /etc/apt/sources.list.d/nvidia-docker.list && \
    apt-get update && \
    apt-get install -y nvidia-container-toolkit && \
    rm -rf /var/lib/apt/lists/*; \
    fi

# Create non-root user with specific UID/GID for security
RUN groupadd -g 1000 foxhunt && \
    useradd -r -u 1000 -g foxhunt -d /app -s /bin/bash -c "Foxhunt Trading System" foxhunt

# Set working directory
WORKDIR /app

# Copy binary from builder stage
COPY --from=builder /app/target/release/tli /app/foxhunt

# Copy configuration and data directories
COPY --chown=foxhunt:foxhunt config/ /app/config/
COPY --chown=foxhunt:foxhunt data/ /app/data/

# Create necessary directories with proper permissions
RUN mkdir -p /app/logs /app/tmp /app/models /app/cache /app/certificates && \
    chown -R foxhunt:foxhunt /app && \
    chmod 755 /app/foxhunt && \
    chmod -R 750 /app/config /app/certificates && \
    chmod -R 755 /app/logs /app/tmp /app/models /app/cache

# Create volume mount points
VOLUME ["/app/logs", "/app/models", "/app/cache", "/app/certificates"]

# Security hardening
RUN echo "foxhunt:x:1000:1000::/app:/bin/bash" >> /etc/passwd && \
    echo "foxhunt:x:1000:" >> /etc/group

# Switch to non-root user
USER foxhunt

# Health check endpoint
HEALTHCHECK --interval=30s --timeout=10s --start-period=60s --retries=3 \
    CMD curl -f http://localhost:${FOXHUNT_HTTP_PORT:-8080}/health || exit 1

# Network ports
EXPOSE ${FOXHUNT_HTTP_PORT:-8080}
EXPOSE ${FOXHUNT_GRPC_PORT:-50051}
EXPOSE ${FOXHUNT_METRICS_PORT:-9090}
EXPOSE ${FOXHUNT_WEBSOCKET_PORT:-8081}

# Environment variables with secure defaults
ENV FOXHUNT_ENV=production \
    FOXHUNT_SERVICE_HOST=0.0.0.0 \
    FOXHUNT_HTTP_PORT=8080 \
    FOXHUNT_GRPC_PORT=50051 \
    FOXHUNT_METRICS_PORT=9090 \
    FOXHUNT_WEBSOCKET_PORT=8081 \
    FOXHUNT_LOG_LEVEL=info \
    FOXHUNT_LOG_FORMAT=json \
    FOXHUNT_CONFIG_PATH=/app/config \
    FOXHUNT_DATA_PATH=/app/data \
    FOXHUNT_MODELS_PATH=/app/models \
    FOXHUNT_CACHE_PATH=/app/cache \
    FOXHUNT_CERTIFICATES_PATH=/app/certificates \
    RUST_LOG=info \
    RUST_BACKTRACE=0 \
    RUST_LOG_STYLE=never

# Performance tuning environment variables
ENV FOXHUNT_THREAD_POOL_SIZE=0 \
    FOXHUNT_MAX_CONNECTIONS=1000 \
    FOXHUNT_CONNECTION_TIMEOUT=30 \
    FOXHUNT_REQUEST_TIMEOUT=60 \
    FOXHUNT_LATENCY_TARGET_MS=50 \
    FOXHUNT_BATCH_SIZE=1000

# Security environment variables
ENV FOXHUNT_SECURITY_ENABLED=true \
    FOXHUNT_TLS_ENABLED=true \
    FOXHUNT_RATE_LIMITING_ENABLED=true \
    FOXHUNT_METRICS_ENABLED=true \
    FOXHUNT_TRACING_ENABLED=true

# GPU configuration (if available)
ENV CUDA_VISIBLE_DEVICES="" \
    FOXHUNT_GPU_ENABLED=auto \
    FOXHUNT_GPU_MEMORY_FRACTION=0.8

# Entry point script for flexible configuration
COPY --chown=foxhunt:foxhunt docker/entrypoint.sh /app/entrypoint.sh
RUN chmod +x /app/entrypoint.sh

# Labels for container metadata
LABEL maintainer="Foxhunt Development Team" \
      version="1.0.0" \
      description="Foxhunt HFT Trading System - Production Monolithic Deployment" \
      vendor="Foxhunt" \
      org.opencontainers.image.title="Foxhunt HFT Trading System" \
      org.opencontainers.image.description="High-frequency trading system with ML intelligence" \
      org.opencontainers.image.version="1.0.0" \
      org.opencontainers.image.vendor="Foxhunt" \
      org.opencontainers.image.licenses="MIT OR Apache-2.0" \
      org.opencontainers.image.source="https://github.com/user/foxhunt" \
      org.opencontainers.image.documentation="https://github.com/user/foxhunt/docs"

# Run the application
ENTRYPOINT ["/app/entrypoint.sh"]
CMD ["/app/foxhunt"]