#!/bin/bash
# Entrypoint script for Foxhunt HFT Trading System
# Used only for development/testing - production runs on bare metal

set -e

# Function to wait for service availability
wait_for_service() {
    local host=$1
    local port=$2
    local service=$3

    echo "Waiting for $service at $host:$port..."
    while ! nc -z "$host" "$port"; do
        sleep 1
    done
    echo "$service is ready!"
}

# Wait for required services if running in Docker
if [ "$FOXHUNT_ENV" = "docker" ] || [ "$FOXHUNT_WAIT_FOR_SERVICES" = "true" ]; then
    # Parse DATABASE_URL if provided
    if [ -n "$DATABASE_URL" ]; then
        DB_HOST=$(echo "$DATABASE_URL" | sed -n 's/.*@\([^:]*\):.*/\1/p')
        DB_PORT=$(echo "$DATABASE_URL" | sed -n 's/.*:\([0-9]*\)\/.*/\1/p')
        wait_for_service "${DB_HOST:-postgres}" "${DB_PORT:-5432}" "PostgreSQL"
    fi

    # Wait for Redis if configured
    if [ -n "$REDIS_URL" ]; then
        REDIS_HOST=$(echo "$REDIS_URL" | sed -n 's/.*@\([^:]*\):.*/\1/p')
        REDIS_PORT=$(echo "$REDIS_URL" | sed -n 's/.*:\([0-9]*\).*/\1/p')
        wait_for_service "${REDIS_HOST:-redis}" "${REDIS_PORT:-6379}" "Redis"
    fi

    # Wait for InfluxDB if configured
    if [ -n "$INFLUXDB_URL" ]; then
        INFLUX_HOST=$(echo "$INFLUXDB_URL" | sed -n 's/.*\/\/\([^:]*\):.*/\1/p')
        INFLUX_PORT=$(echo "$INFLUXDB_URL" | sed -n 's/.*:\([0-9]*\).*/\1/p')
        wait_for_service "${INFLUX_HOST:-influxdb}" "${INFLUX_PORT:-8086}" "InfluxDB"
    fi
fi

# Run database migrations if enabled
if [ "$FOXHUNT_RUN_MIGRATIONS" = "true" ]; then
    echo "Running database migrations..."
    # Migration command would go here
    echo "Migrations complete!"
fi

# Configure GPU if available and enabled
if [ "$FOXHUNT_GPU_ENABLED" = "auto" ] || [ "$FOXHUNT_GPU_ENABLED" = "true" ]; then
    if command -v nvidia-smi > /dev/null 2>&1; then
        echo "GPU detected, configuring CUDA..."
        export CUDA_VISIBLE_DEVICES=${CUDA_VISIBLE_DEVICES:-0}
        nvidia-smi
    else
        echo "No GPU detected, running CPU-only mode"
        export FOXHUNT_GPU_ENABLED=false
    fi
fi

# Performance tuning for production
if [ "$FOXHUNT_ENV" = "production" ]; then
    echo "Applying production performance tuning..."

    # Set CPU affinity if specified
    if [ -n "$FOXHUNT_CPU_AFFINITY" ]; then
        taskset -c "$FOXHUNT_CPU_AFFINITY" "$@"
    fi

    # Increase file descriptor limits
    ulimit -n 65536

    # Set thread pool size based on CPU cores if not specified
    if [ "$FOXHUNT_THREAD_POOL_SIZE" = "0" ]; then
        export FOXHUNT_THREAD_POOL_SIZE=$(nproc)
    fi
fi

# Execute the main application
echo "Starting Foxhunt HFT Trading System..."
echo "Environment: $FOXHUNT_ENV"
echo "HTTP Port: $FOXHUNT_HTTP_PORT"
echo "gRPC Port: $FOXHUNT_GRPC_PORT"
echo "GPU Enabled: $FOXHUNT_GPU_ENABLED"

exec "$@"