#!/bin/bash

# Copyright (c) Meta Platforms, Inc. and affiliates.
# All rights reserved.
#
# This source code is licensed under the terms described in the LICENSE file in
# the root directory of this source tree.

LLAMA_MODELS_DIR=${LLAMA_MODELS_DIR:-}
LLAMA_STACK_DIR=${LLAMA_STACK_DIR:-}
TEST_PYPI_VERSION=${TEST_PYPI_VERSION:-}

if [ "$#" -lt 4 ]; then
  echo "Usage: $0 <build_name> <docker_base> <pip_dependencies> [<special_pip_deps>]" >&2
  echo "Example: $0 my-fastapi-app python:3.9-slim 'fastapi uvicorn' " >&2
  exit 1
fi

special_pip_deps="$6"

set -euo pipefail

build_name="$1"
image_name="distribution-$build_name"
docker_base=$2
build_file_path=$3
host_build_dir=$4
pip_dependencies=$5

# Define color codes
RED='\033[0;31m'
GREEN='\033[0;32m'
NC='\033[0m' # No Color

SCRIPT_DIR=$(dirname "$(readlink -f "$0")")
REPO_DIR=$(dirname $(dirname "$SCRIPT_DIR"))
DOCKER_BINARY=${DOCKER_BINARY:-docker}
DOCKER_OPTS=${DOCKER_OPTS:-}
REPO_CONFIGS_DIR="$REPO_DIR/tmp/configs"

TEMP_DIR=$(mktemp -d)

add_to_docker() {
  local input
  output_file="$TEMP_DIR/Dockerfile"
  if [ -t 0 ]; then
    printf '%s\n' "$1" >>"$output_file"
  else
    # If stdin is not a terminal, read from it (heredoc)
    cat >>"$output_file"
  fi
}

add_to_docker <<EOF
FROM $docker_base
WORKDIR /app

RUN apt-get update && apt-get install -y \
       iputils-ping net-tools iproute2 dnsutils telnet \
       curl wget telnet \
       procps psmisc lsof \
       traceroute \
       bubblewrap \
       && rm -rf /var/lib/apt/lists/*

EOF

stack_mount="/app/llama-stack-source"
models_mount="/app/llama-models-source"

if [ -n "$LLAMA_STACK_DIR" ]; then
  if [ ! -d "$LLAMA_STACK_DIR" ]; then
    echo "${RED}Warning: LLAMA_STACK_DIR is set but directory does not exist: $LLAMA_STACK_DIR${NC}" >&2
    exit 1
  fi

  # Install in editable format. We will mount the source code into the container
  # so that changes will be reflected in the container without having to do a
  # rebuild. This is just for development convenience.
  add_to_docker "RUN pip install -e $stack_mount"
else
  add_to_docker "RUN pip install llama-stack"
fi

if [ -n "$LLAMA_MODELS_DIR" ]; then
  if [ ! -d "$LLAMA_MODELS_DIR" ]; then
    echo "${RED}Warning: LLAMA_MODELS_DIR is set but directory does not exist: $LLAMA_MODELS_DIR${NC}" >&2
    exit 1
  fi

  add_to_docker <<EOF
RUN pip uninstall -y llama-models
RUN pip install $models_mount

EOF
fi

if [ -n "$pip_dependencies" ]; then
  add_to_docker "RUN pip install $pip_dependencies"
fi

if [ -n "$special_pip_deps" ]; then
  IFS='#' read -ra parts <<<"$special_pip_deps"
  for part in "${parts[@]}"; do
    add_to_docker "RUN pip install $part"
  done
fi

add_to_docker <<EOF

# This would be good in production but for debugging flexibility lets not add it right now
# We need a more solid production ready entrypoint.sh anyway
#
ENTRYPOINT ["python", "-m", "llama_stack.distribution.server.server"]

EOF

add_to_docker "ADD tmp/configs/$(basename "$build_file_path") ./llamastack-build.yaml"

printf "Dockerfile created successfully in $TEMP_DIR/Dockerfile"
cat $TEMP_DIR/Dockerfile
printf "\n"

mounts=""
if [ -n "$LLAMA_STACK_DIR" ]; then
  mounts="$mounts -v $(readlink -f $LLAMA_STACK_DIR):$stack_mount"
fi
if [ -n "$LLAMA_MODELS_DIR" ]; then
  mounts="$mounts -v $(readlink -f $LLAMA_MODELS_DIR):$models_mount"
fi

if command -v selinuxenabled &>/dev/null && selinuxenabled; then
  # Disable SELinux labels -- we don't want to relabel the llama-stack source dir
  DOCKER_OPTS="$DOCKER_OPTS --security-opt label=disable"
fi

set -x
$DOCKER_BINARY build $DOCKER_OPTS -t $image_name -f "$TEMP_DIR/Dockerfile" "$REPO_DIR" $mounts

# clean up tmp/configs
rm -rf $REPO_CONFIGS_DIR
set +x

echo "Success!"