#!/bin/bash
#
# Usage:
#   source activate.sh
#
# Required:
#   1) ./.venv (Python venv)
#

# Must be sourced
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
  echo "ERROR: Please source this script: source activate.sh" >&2
  exit 1
fi

PROJECT_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"

# 1) venv (required)
VENV_ACTIVATE="${PROJECT_ROOT}/.venv/bin/activate"
if [[ -f "${VENV_ACTIVATE}" ]]; then
  # shellcheck disable=SC1090
  source "${VENV_ACTIVATE}"
  ENV_KIND="venv"
else
  echo "ERROR: No .venv found at ${VENV_ACTIVATE}" >&2
  echo "  - Create venv: ./scripts/create_venv.sh" >&2
  return 1
fi

# 如果需要加载 .env 中的环境变量
ENV_FILE="${PROJECT_ROOT}/.env"
if [ -f "${ENV_FILE}" ]; then
    while IFS= read -r line || [ -n "${line}" ]; do
        line="${line%$'\r'}"
        [[ -z "${line//[[:space:]]/}" ]] && continue
        [[ "${line}" =~ ^[[:space:]]*# ]] && continue
        [[ "${line}" != *=* ]] && continue

        key="${line%%=*}"
        value="${line#*=}"
        key="${key#"${key%%[![:space:]]*}"}"
        key="${key%"${key##*[![:space:]]}"}"
        value="${value#"${value%%[![:space:]]*}"}"

        if [[ ${#value} -ge 2 ]]; then
            first="${value:0:1}"
            last="${value: -1}"
            if [[ ("${first}" == '"' && "${last}" == '"') || ("${first}" == "'" && "${last}" == "'") ]]; then
                value="${value:1:${#value}-2}"
            fi
        fi

        export "${key}=${value}"
    done < "${ENV_FILE}"
fi

echo "Environment activated (${ENV_KIND}): ${VIRTUAL_ENV:-${CONDA_DEFAULT_ENV:-unknown}}"