#!/usr/bin/env bash
#
# cruft installer — https://cruft.sh/install
#
#   curl -fsSL https://cruft.sh/install | bash
#   curl -fsSL https://cruft.sh/install | bash -s 0.0.10   # pin a version
#
# Downloads the prebuilt cruft binary for your OS/arch from the npm registry
# (the same artifacts `npm i -g cruftjs` uses — the registry is a plain HTTPS
# host, so this needs only curl + tar, not node/npm) and installs it to
# ~/.cruft/bin. Override the location with CRUFT_INSTALL.
set -euo pipefail

platform=$(uname -ms)

# On Windows outside a MINGW bash, hand off to the PowerShell installer.
if [[ ${OS:-} = Windows_NT ]]; then
  if [[ $platform != MINGW64* ]]; then
    powershell -c "irm cruft.sh/install.ps1|iex"
    exit $?
  fi
fi

# ── colors (only when stdout is a tty) ───────────────────────────────────────
Color_Off=''; Red=''; Green=''; Dim=''; Bold_White=''; Bold_Green=''
if [[ -t 1 ]]; then
  Color_Off='\033[0m'; Red='\033[0;31m'; Green='\033[0;32m'; Dim='\033[0;2m'
  Bold_Green='\033[1;32m'; Bold_White='\033[1m'
fi
error()     { echo -e "${Red}error${Color_Off}:" "$@" >&2; exit 1; }
info()      { echo -e "${Dim}$@ ${Color_Off}"; }
info_bold() { echo -e "${Bold_White}$@ ${Color_Off}"; }
success()   { echo -e "${Green}$@ ${Color_Off}"; }

command -v curl >/dev/null || error 'curl is required to install cruft'
command -v tar  >/dev/null || error 'tar is required to install cruft'

if [[ $# -gt 1 ]]; then
  error 'Too many arguments. Only one is allowed: a cruft version to install (e.g. "0.0.10").'
fi

# ── resolve target (npm platform-package suffix) ─────────────────────────────
case $platform in
'Darwin x86_64')                      target=darwin-x64 ;;
'Darwin arm64')                       target=darwin-arm64 ;;
'Linux aarch64' | 'Linux arm64')      target=linux-arm64 ;;
'Linux x86_64')                       target=linux-x64 ;;
'MINGW64'*)                           target=win32-x64 ;;
'Linux riscv64')                      error 'cruft is not yet available for linux riscv64' ;;
*)                                    target=linux-x64 ;;
esac

# Rosetta: a darwin-x64 shell on Apple Silicon should take the native binary.
if [[ $target = darwin-x64 ]]; then
  if [[ $(sysctl -n sysctl.proc_translated 2>/dev/null || echo 0) = 1 ]]; then
    target=darwin-arm64
    info "Your shell is running under Rosetta 2; installing cruft for $target instead."
  fi
fi

# cruft's linux binary is glibc-only; there is no musl build yet.
if [[ $target = linux-* && -f /etc/alpine-release ]]; then
  error 'cruft has no musl (Alpine) build yet. A glibc-based image is required.'
fi

exe_name=cruft
[[ $target = win32-* ]] && exe_name=cruft.exe

# ── resolve the version + tarball from the npm registry ──────────────────────
registry=${CRUFT_NPM_REGISTRY:-https://registry.npmjs.org}
pkg="@cruftless-dev/cruft-$target"
req_version=${1:-latest}
req_version=${req_version#v}   # accept "v0.0.10" or "0.0.10"

meta=$(curl -fsL "$registry/$pkg/$req_version" 2>/dev/null) ||
  error "No cruft release found for $pkg@$req_version (check the version, or your network)."

tarball=$(printf '%s' "$meta" | grep -o '"tarball":"[^"]*"' | head -1 | sed 's/.*"tarball":"//; s/"$//')
version=$(printf '%s' "$meta" | sed -n 's/.*"version":"\([^"]*\)".*/\1/p' | head -1)
[[ -n $tarball ]] || error "No prebuilt cruft binary found for $target (version $req_version)."

# ── download + extract ───────────────────────────────────────────────────────
install_dir=${CRUFT_INSTALL:-$HOME/.cruft}
bin_dir=$install_dir/bin
exe=$bin_dir/cruft
mkdir -p "$bin_dir" || error "Failed to create install directory \"$bin_dir\""

tmp=$(mktemp -d)
trap 'rm -rf "$tmp"' EXIT

curl --fail --location --progress-bar --output "$tmp/cruft.tgz" "$tarball" ||
  error "Failed to download cruft from \"$tarball\""

tar -xzf "$tmp/cruft.tgz" -C "$tmp" ||
  error 'Failed to extract the cruft archive'

[[ -f "$tmp/package/$exe_name" ]] ||
  error "Archive did not contain the expected binary ($exe_name)"

mv "$tmp/package/$exe_name" "$exe" || error 'Failed to install the cruft binary'
chmod +x "$exe" || error 'Failed to set permissions on the cruft binary'

tildify() {
  if [[ $1 = $HOME/* ]]; then echo "~/${1#"$HOME"/}"; else echo "$1"; fi
}

success "cruft $version was installed successfully to $Bold_Green$(tildify "$exe")"

if command -v cruft >/dev/null && [[ "$(command -v cruft)" = "$exe" ]]; then
  echo "Run 'cruft --help' to get started"
  exit
fi

# ── wire up PATH for the user's shell (mirrors the bun installer) ────────────
refresh_command=''
tilde_bin_dir=$(tildify "$bin_dir")
quoted_install_dir="\"${install_dir//\"/\\\"}\""
[[ $quoted_install_dir = \"$HOME/* ]] && quoted_install_dir=${quoted_install_dir/$HOME\//\$HOME/}

echo
case $(basename "${SHELL:-}") in
fish)
  commands=(
    "set --export CRUFT_INSTALL $quoted_install_dir"
    "set --export PATH \$CRUFT_INSTALL/bin \$PATH"
  )
  config=$HOME/.config/fish/config.fish
  ;;
zsh)
  commands=(
    "export CRUFT_INSTALL=$quoted_install_dir"
    "export PATH=\"\$CRUFT_INSTALL/bin:\$PATH\""
  )
  config=$HOME/.zshrc
  ;;
bash)
  commands=(
    "export CRUFT_INSTALL=$quoted_install_dir"
    "export PATH=\"\$CRUFT_INSTALL/bin:\$PATH\""
  )
  config=$HOME/.bashrc
  ;;
*)
  config=''
  echo 'Manually add cruft to your PATH (in ~/.bashrc or similar):'
  info_bold "  export CRUFT_INSTALL=$quoted_install_dir"
  info_bold "  export PATH=\"\$CRUFT_INSTALL/bin:\$PATH\""
  ;;
esac

if [[ -n $config ]]; then
  tilde_config=$(tildify "$config")
  if [[ -w $config ]] || [[ ! -e $config && -w $(dirname "$config") ]]; then
    {
      echo -e '\n# cruft'
      for c in "${commands[@]}"; do echo "$c"; done
    } >>"$config"
    info "Added \"$tilde_bin_dir\" to \$PATH in \"$tilde_config\""
    refresh_command="source $tilde_config"
  else
    echo "Manually add the directory to $tilde_config (or similar):"
    for c in "${commands[@]}"; do info_bold "  $c"; done
  fi
fi

echo
info "To get started, run:"
echo
[[ -n $refresh_command ]] && info_bold "  $refresh_command"
info_bold "  cruft --help"