#!/usr/bin/env bash
set -euo pipefail

root_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
frontend_dir="${root_dir}/frontend"

load_env_file() {
  local env_file="$1"
  [[ -f "${env_file}" ]] || return 0

  while IFS= read -r line || [[ -n "${line}" ]]; do
    line="${line#"${line%%[![:space:]]*}"}"
    line="${line%"${line##*[![:space:]]}"}"
    [[ -z "${line}" || "${line}" == \#* ]] && continue

    local key="${line%%=*}"
    local value="${line#*=}"
    key="${key%"${key##*[![:space:]]}"}"
    key="${key#export }"
    value="${value#"${value%%[![:space:]]*}"}"
    value="${value%"${value##*[![:space:]]}"}"
    if [[ "${value}" == \"*\" && "${value}" == *\" ]]; then
      value="${value:1:-1}"
    elif [[ "${value}" == \'*\' && "${value}" == *\' ]]; then
      value="${value:1:-1}"
    fi

    if [[ -z "${!key+x}" ]]; then
      export "${key}=${value}"
    fi
  done < "${env_file}"
}

load_env_file "${root_dir}/.env"
load_env_file "${root_dir}/.env.local"

if [[ -x "${root_dir}/.venv/bin/python" ]]; then
  python_cmd="${root_dir}/.venv/bin/python"
else
  python_cmd="${PYTHON_BIN:-python3}"
fi

if [[ -n "${BUN_BIN:-}" ]]; then
  bun_cmd="${BUN_BIN}"
elif [[ -x "${HOME}/.bun/bin/bun" ]]; then
  bun_cmd="${HOME}/.bun/bin/bun"
else
  bun_cmd="bun"
fi

host="${HOST:-0.0.0.0}"
port="${PORT:-8000}"

if ! command -v "${python_cmd}" >/dev/null 2>&1; then
  echo "Python runtime not found: ${python_cmd}" >&2
  exit 1
fi

if ! command -v "${bun_cmd}" >/dev/null 2>&1; then
  echo "Bun runtime not found: ${bun_cmd}" >&2
  exit 1
fi

echo "==> Building frontend"
(
  cd "${frontend_dir}"
  "${bun_cmd}" run build
)

echo "==> Starting backend on ${host}:${port}"
cd "${root_dir}"
exec "${python_cmd}" -m uvicorn app:app --host "${host}" --port "${port}"