# =============================================================================
# FOXHUNT HFT TRADING SYSTEM - BASE MULTI-STAGE DOCKERFILE
# =============================================================================
# This file provides the foundation for all Foxhunt service containers
# with performance-optimized Rust builds and tiered runtime images

# =============================================================================
# BUILDER STAGE - Optimized Rust Build Environment
# =============================================================================
FROM rust:1.75-slim as rust-builder

# Install build dependencies for all services
RUN apt-get update && apt-get install -y \
    # Core build tools
    build-essential \
    pkg-config \
    # SSL/TLS support
    libssl-dev \
    ca-certificates \
    # Database client libraries
    libpq-dev \
    # Protocol buffers
    protobuf-compiler \
    # Additional utilities
    curl \
    git \
    && rm -rf /var/lib/apt/lists/*

# Configure Cargo for optimized builds
ENV CARGO_NET_GIT_FETCH_WITH_CLI=true
ENV CARGO_INCREMENTAL=0
ENV CARGO_PROFILE_RELEASE_LTO=true
ENV CARGO_PROFILE_RELEASE_CODEGEN_UNITS=1
ENV CARGO_PROFILE_RELEASE_PANIC=abort
ENV CARGO_PROFILE_RELEASE_OPT_LEVEL=3
ENV CARGO_PROFILE_RELEASE_DEBUG=false
ENV CARGO_PROFILE_RELEASE_DEBUG_ASSERTIONS=false
ENV CARGO_PROFILE_RELEASE_OVERFLOW_CHECKS=false
ENV CARGO_PROFILE_RELEASE_STRIP=true

# Set workspace directory
WORKDIR /workspace

# =============================================================================
# ULTRA-PERFORMANCE BASE (For Trading Service)
# =============================================================================
FROM gcr.io/distroless/cc-debian12 as ultra-performance-base

# Minimal runtime for maximum performance
# - No shell, no package manager
# - Minimal libc and SSL only
# - ~20MB total size
# - Sub-nanosecond container overhead

# =============================================================================
# BALANCED PERFORMANCE BASE (For ML/Backtesting Services)  
# =============================================================================
FROM ubuntu:22.04-slim as balanced-performance-base

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

# Create app user for security
RUN groupadd -r foxhunt && useradd -r -g foxhunt foxhunt

# =============================================================================
# DEVELOPMENT BASE (For TLI and development)
# =============================================================================
FROM alpine:3.19 as development-base

# Install runtime dependencies
RUN apk add --no-cache \
    ca-certificates \
    libssl3 \
    libpq \
    curl \
    bash \
    # Terminal support
    ncurses \
    && rm -rf /var/cache/apk/*

# Create app user
RUN addgroup -g 1001 foxhunt && adduser -D -s /bin/bash -u 1001 -G foxhunt foxhunt

# =============================================================================
# CARGO CONFIGURATION TEMPLATE
# =============================================================================
# This section provides the cargo configuration that should be copied
# by service-specific Dockerfiles for optimal builds

# Copy and cache dependencies first (leverage Docker layer caching)
COPY Cargo.toml Cargo.lock ./

# Create dummy main files for all workspace members to enable dependency caching
RUN mkdir -p trading_engine/src services/trading_service/src services/backtesting_service/src \
    services/ml_training_service/src tli/src risk/src ml/src data/src common/src storage/src \
    market-data/src database/src crates/config/src crates/model_loader/src tests/src \
    backtesting/src adaptive-strategy/src risk-data/src && \
    echo "fn main() {}" > services/trading_service/src/main.rs && \
    echo "fn main() {}" > services/backtesting_service/src/main.rs && \
    echo "fn main() {}" > services/ml_training_service/src/main.rs && \
    echo "fn main() {}" > tli/src/main.rs && \
    echo "pub fn dummy() {}" > trading_engine/src/lib.rs && \
    echo "pub fn dummy() {}" > risk/src/lib.rs && \
    echo "pub fn dummy() {}" > ml/src/lib.rs && \
    echo "pub fn dummy() {}" > data/src/lib.rs && \
    echo "pub fn dummy() {}" > common/src/lib.rs && \
    echo "pub fn dummy() {}" > storage/src/lib.rs && \
    echo "pub fn dummy() {}" > market-data/src/lib.rs && \
    echo "pub fn dummy() {}" > database/src/lib.rs && \
    echo "pub fn dummy() {}" > crates/config/src/lib.rs && \
    echo "pub fn dummy() {}" > crates/model_loader/src/lib.rs && \
    echo "pub fn dummy() {}" > tests/src/lib.rs && \
    echo "pub fn dummy() {}" > backtesting/src/lib.rs && \
    echo "pub fn dummy() {}" > adaptive-strategy/src/lib.rs && \
    echo "pub fn dummy() {}" > risk-data/src/lib.rs

# =============================================================================
# PERFORMANCE OPTIMIZATION CONFIGURATION
# =============================================================================

# Memory allocation optimization for HFT
ENV MALLOC_CONF="background_thread:false,dirty_decay_ms:0,muzzy_decay_ms:0"

# Rust runtime optimizations
ENV RUST_BACKTRACE=0
ENV RUST_LOG_STYLE=never

# CPU optimization hints  
ENV CARGO_CFG_TARGET_FEATURE="+crt-static"

# =============================================================================
# HEALTH CHECK UTILITIES
# =============================================================================
# Common health check patterns for all services

# Health check for gRPC services (copy this to service Dockerfiles)
# HEALTHCHECK --interval=30s --timeout=10s --start-period=30s --retries=3 \
#     CMD curl -f http://localhost:8081/health || exit 1

# =============================================================================
# BUILD INSTRUCTIONS FOR SERVICE-SPECIFIC DOCKERFILES
# =============================================================================

# 1. ULTRA-PERFORMANCE SERVICES (Trading Service):
#    - Use ultra-performance-base
#    - Static linking with musl
#    - No debug symbols
#    - Minimal dependencies

# 2. BALANCED SERVICES (ML Training, Backtesting):
#    - Use balanced-performance-base  
#    - Dynamic linking acceptable
#    - Full feature sets
#    - Service mesh compatible

# 3. DEVELOPMENT SERVICES (TLI):
#    - Use development-base
#    - Debug symbols included
#    - Shell access
#    - Development tools