# Multi-stage build for Foxhunt Backtesting Service
# Wave 71 Agent 8: Production-optimized Docker image

# =============================================================================
# Builder Stage
# =============================================================================
FROM rust:1.83-slim-bookworm AS builder

# Install build dependencies
RUN apt-get update && apt-get install -y \
    pkg-config \
    libssl-dev \
    protobuf-compiler \
    && rm -rf /var/lib/apt/lists/*

# Set working directory
WORKDIR /build

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

# Copy all workspace crates (all members required for workspace build)
COPY common ./common
COPY config ./config
COPY trading_engine ./trading_engine
COPY risk ./risk
COPY risk-data ./risk-data
COPY trading-data ./trading-data
COPY ml ./ml
COPY ml-data ./ml-data
COPY data ./data
COPY backtesting ./backtesting
COPY adaptive-strategy ./adaptive-strategy
COPY storage ./storage
COPY market-data ./market-data
COPY database ./database
COPY tli ./tli
COPY tests ./tests
COPY services/api_gateway ./services/api_gateway
COPY services/trading_service ./services/trading_service
COPY services/backtesting_service ./services/backtesting_service
COPY services/ml_training_service ./services/ml_training_service

# Build dependencies first (layer caching optimization)
# Create dummy main.rs files for all workspace members to cache dependencies
RUN mkdir -p services/backtesting_service/src && \
    echo "fn main() {}" > services/backtesting_service/src/main.rs && \
    mkdir -p common/src && echo "pub fn dummy() {}" > common/src/lib.rs && \
    mkdir -p config/src && echo "pub fn dummy() {}" > config/src/lib.rs && \
    mkdir -p trading_engine/src && echo "pub fn dummy() {}" > trading_engine/src/lib.rs && \
    mkdir -p backtesting/src && echo "pub fn dummy() {}" > backtesting/src/lib.rs && \
    mkdir -p storage/src && echo "pub fn dummy() {}" > storage/src/lib.rs && \
    mkdir -p database/src && echo "pub fn dummy() {}" > database/src/lib.rs && \
    cargo build --release -p backtesting_service 2>&1 | grep -E '(Compiling|Finished|error)' && \
    find target/release -type f -executable -delete && \
    rm -rf common/src config/src trading_engine/src backtesting/src storage/src database/src services/backtesting_service/src

# Copy actual source code for all required crates
COPY common/src ./common/src
COPY config/src ./config/src
COPY trading_engine/src ./trading_engine/src
COPY backtesting/src ./backtesting/src
COPY storage/src ./storage/src
COPY database/src ./database/src
COPY services/backtesting_service/src ./services/backtesting_service/src
COPY services/backtesting_service/build.rs ./services/backtesting_service/build.rs 2>/dev/null || true

# Build the application (dependencies already cached)
RUN cargo build --release -p backtesting_service

# =============================================================================
# Runtime Stage
# =============================================================================
FROM debian:bookworm-slim

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

# Download and install grpc_health_probe
RUN curl -sSL https://github.com/grpc-ecosystem/grpc-health-probe/releases/download/v0.4.25/grpc_health_probe-linux-amd64 \
    -o /usr/local/bin/grpc_health_probe && \
    chmod +x /usr/local/bin/grpc_health_probe

# Create non-root user
RUN groupadd --system --gid 1000 foxhunt && \
    useradd --system --uid 1000 --gid foxhunt --shell /bin/bash foxhunt

# Create application directories
RUN mkdir -p /app/config /app/logs /app/data /app/results && \
    chown -R foxhunt:foxhunt /app

# Set working directory
WORKDIR /app

# Copy binary from builder
COPY --from=builder /build/target/release/backtesting_service ./backtesting_service
RUN chmod +x ./backtesting_service

# Switch to non-root user
USER foxhunt

# Expose gRPC and metrics ports
EXPOSE 50052 9093

# Health check using grpc_health_probe
HEALTHCHECK --interval=10s --timeout=5s --start-period=30s --retries=3 \
    CMD /usr/local/bin/grpc_health_probe -addr=localhost:50052 || exit 1

# Run the application
ENTRYPOINT ["./backtesting_service"]