#!/bin/bash
if ! type "include" >/dev/null 2>&1; then
  include() {
    . "$(cd "$(dirname "$1")" && pwd)/${2}"
  }
fi
include "${BASH_SOURCE[0]}" ./pragma_once.bash
if ! pragma_once ${BASH_SOURCE[0]}; then return 0; fi
install_llvm_mingw() {
  local ver="$1"
  local install_dir="${_ae_root_}/opt/llvm-mingw"
  local repo="https://github.com/mstorsjo/llvm-mingw.git"
  local release_base="https://github.com/mstorsjo/llvm-mingw/releases/download"
  local work_dir="${install_dir}/.install"
  local download_dir="${work_dir}/download"
  local extract_dir="${work_dir}/extract"
  sudo mkdir -p "${download_dir}" "${extract_dir}"
  if [[ -z "$ver" ]]; then
    ver=$(git ls-remote --tags "${repo}" |
      awk '{print $2}' |
      sed 's#refs/tags/##' |
      sed 's/\^{}//g' |
      grep -E '^[0-9]{8}$' |
      sort -V |
      tail -n 1)
  fi
  if [[ -z "$ver" ]]; then
    echo "[llvm-mingw] failed to resolve version" >&2
    return 1
  fi
  echo "[llvm-mingw] selected version=${ver}"
  local file=""
  local url=""
  local candidates=(
    "llvm-mingw-${ver}-ucrt-ubuntu-22.04-x86_64.tar.xz"
    "llvm-mingw-${ver}-ucrt-ubuntu-20.04-x86_64.tar.xz"
    "llvm-mingw-${ver}-ucrt-ubuntu-18.04-x86_64.tar.xz"
    "llvm-mingw-${ver}-ucrt-x86_64-linux.tar.xz"
    "llvm-mingw-${ver}-msvcrt-ubuntu-22.04-x86_64.tar.xz"
    "llvm-mingw-${ver}-msvcrt-ubuntu-20.04-x86_64.tar.xz"
    "llvm-mingw-${ver}-msvcrt-ubuntu-18.04-x86_64.tar.xz"
    "llvm-mingw-${ver}-msvcrt-x86_64-linux.tar.xz"
  )
  for file in "${candidates[@]}"; do
    url="${release_base}/${ver}/${file}"
    echo "[llvm-mingw] test ${url}"
    if wget -q --spider "${url}"; then
      break
    fi
    file=""
  done
  if [[ -z "$file" ]]; then
    echo "[llvm-mingw] no downloadable linux x86_64 asset found for ${ver}" >&2
    return 1
  fi
  url="${release_base}/${ver}/${file}"
  echo "[llvm-mingw] downloading ${url}"
  sudo rm -rf "${work_dir}"
  sudo mkdir -p "${download_dir}" "${extract_dir}"
  sudo wget -q --show-progress "${url}" -O "${download_dir}/${file}"
  if [[ $? -ne 0 ]]; then
    echo "[llvm-mingw] download failed ${url}" >&2
    return 1
  fi
  sudo tar -xf "${download_dir}/${file}" -C "${extract_dir}"
  local src_dir=""
  src_dir=$(find "${extract_dir}" -mindepth 1 -maxdepth 1 -type d -name "llvm-mingw-*" | head -n 1)
  if [[ -z "$src_dir" ]]; then
    echo "[llvm-mingw] extract failed" >&2
    return 1
  fi
  sudo find "${install_dir}" -mindepth 1 -maxdepth 1 ! -name ".install" -exec rm -rf {} +
  sudo cp -a "${src_dir}/." "${install_dir}/"
  sudo rm -rf "${work_dir}"
  export PATH="${install_dir}/bin:$PATH"
  echo "[llvm-mingw installed] version=${ver}"
  echo "[llvm-mingw path] ${install_dir}"
}
check_llvm_mingw() {
  local clang="${_ae_root_}/opt/llvm-mingw/bin/x86_64-w64-mingw32-clang"
  if [[ -x "$clang" ]]; then
    "$clang" --version | head -n1
    return 0
  fi
  if ! command -v x86_64-w64-mingw32-clang >/dev/null 2>&1; then
    echo "[llvm-mingw] not installed"
    return 1
  fi
  x86_64-w64-mingw32-clang --version | head -n1
}
get_llvm_mingw_version() {
  local clang="${_ae_root_}/opt/llvm-mingw/bin/x86_64-w64-mingw32-clang"
  if [[ -x "$clang" ]]; then
    "$clang" --version | head -n1
    return
  fi
  if ! command -v x86_64-w64-mingw32-clang >/dev/null 2>&1; then
    echo "none"
    return
  fi
  x86_64-w64-mingw32-clang --version | head -n1
}
llvm_mingw_require() {
  local required="$1"
  local cur
  cur=$(get_llvm_mingw_version)
  if [[ "$cur" == "none" ]]; then
    return 1
  fi
  echo "$cur" | grep -q "$required"
}