#!/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.

# TODO: combine this with build_conda_env.sh since it is almost identical
# the only difference is that we don't do any conda-specific setup

LLAMA_MODELS_DIR=${LLAMA_MODELS_DIR:-}
LLAMA_STACK_DIR=${LLAMA_STACK_DIR:-}
TEST_PYPI_VERSION=${TEST_PYPI_VERSION:-}
# This timeout (in seconds) is necessary when installing PyTorch via uv since it's likely to time out
# Reference: https://github.com/astral-sh/uv/pull/1694
UV_HTTP_TIMEOUT=${UV_HTTP_TIMEOUT:-500}

if [ -n "$LLAMA_STACK_DIR" ]; then
  echo "Using llama-stack-dir=$LLAMA_STACK_DIR"
fi
if [ -n "$LLAMA_MODELS_DIR" ]; then
  echo "Using llama-models-dir=$LLAMA_MODELS_DIR"
fi

if [ "$#" -lt 3 ]; then
  echo "Usage: $0 <distribution_type> <build_name> <build_file_path> <pip_dependencies> [<special_pip_deps>]" >&2
  echo "Example: $0 <distribution_type> mybuild ./my-stack-build.yaml 'numpy pandas scipy'" >&2
  exit 1
fi

special_pip_deps="$4"

set -euo pipefail

build_name="$1"
env_name="llamastack-$build_name"
build_file_path="$2"
pip_dependencies="$3"

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

# this is set if we actually create a new conda in which case we need to clean up
ENVNAME=""

SCRIPT_DIR=$(dirname "$(readlink -f "$0")")
source "$SCRIPT_DIR/common.sh"

run() {
  local env_name="$1"
  local pip_dependencies="$2"
  local special_pip_deps="$3"

  pip install uv
  if [ -n "$TEST_PYPI_VERSION" ]; then
    # these packages are damaged in test-pypi, so install them first
    uv pip install fastapi libcst
    uv pip install --extra-index-url https://test.pypi.org/simple/ \
      llama-models==$TEST_PYPI_VERSION llama-stack==$TEST_PYPI_VERSION \
      $pip_dependencies
    if [ -n "$special_pip_deps" ]; then
      IFS='#' read -ra parts <<<"$special_pip_deps"
      for part in "${parts[@]}"; do
        echo "$part"
        uv pip install $part
      done
    fi
  else
    # Re-installing llama-stack in the new conda environment
    if [ -n "$LLAMA_STACK_DIR" ]; then
      if [ ! -d "$LLAMA_STACK_DIR" ]; then
        printf "${RED}Warning: LLAMA_STACK_DIR is set but directory does not exist: $LLAMA_STACK_DIR${NC}\n" >&2
        exit 1
      fi

      printf "Installing from LLAMA_STACK_DIR: $LLAMA_STACK_DIR\n"
      uv pip install --no-cache-dir -e "$LLAMA_STACK_DIR"
    else
      uv pip install --no-cache-dir llama-stack
    fi

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

      printf "Installing from LLAMA_MODELS_DIR: $LLAMA_MODELS_DIR\n"
      uv pip uninstall llama-models
      uv pip install --no-cache-dir -e "$LLAMA_MODELS_DIR"
    fi

    # Install pip dependencies
    printf "Installing pip dependencies\n"
    uv pip install $pip_dependencies
    if [ -n "$special_pip_deps" ]; then
      IFS='#' read -ra parts <<<"$special_pip_deps"
      for part in "${parts[@]}"; do
        echo "$part"
        uv pip install $part
      done
    fi
  fi
}

run "$env_name" "$pip_dependencies" "$special_pip_deps"