#!/bin/bash

# configure reads TITLE and DESCRIPTION
# shellcheck disable=SC2034
TITLE="Languages"
# shellcheck disable=SC2034
DESCRIPTION="Install more languages with mise, e.g. Ruby on Rails"

# Records that you've chosen, even if you chose nothing, so this isn't "to do"
LANGUAGES_CONF="$HOME/.config/coredesktop/languages"

# mise installs these gems into each Ruby it installs, so Rails is still there
# after update moves to a new Ruby
DEFAULT_GEMS="$HOME/.default-gems"

is_installed() {
  command -v mise > /dev/null
}

is_configured() {
  [ -f "$LANGUAGES_CONF" ]
}

# Add a gem to ~/.default-gems unless it's there
add_default_gem() {
  grep -qsx "$1" "$DEFAULT_GEMS" || echo "$1" >> "$DEFAULT_GEMS"
}

install_rails() {
  echo "Installing Ruby and Rails..."
  add_default_gem bundler || return 1
  add_default_gem rails || return 1
  mise use -g ruby@latest || return 1
  # Ruby may already have been installed before ~/.default-gems listed these
  mise exec -- gem install --conservative bundler rails || return 1
  grep -qsx rails "$LANGUAGES_CONF" || echo rails >> "$LANGUAGES_CONF"
}

run_configure() {
  local tools tool
  export MISE_YES=1
  # From home, so a project's mise.toml in the current directory doesn't count
  cd "$HOME" || return 1

  echo "Go, Rust, Node.js, Python, Bun and Zig are already installed. mise installs other"
  echo "languages for you, and the version a project asks for in its mise.toml."
  mkdir -p "$(dirname "$LANGUAGES_CONF")"
  touch "$LANGUAGES_CONF" || return 1

  if confirm "Install Ruby on Rails?"; then
    install_rails || return 1
  fi

  echo "Anything else? Name tools mise knows (mise registry lists them), with a version,"
  read -rp "e.g. java@21 deno@latest, or press Enter for none: " tools
  for tool in $tools; do
    echo "Installing $tool..."
    mise use -g "$tool" || return 1
  done

  echo "update keeps them up to date. To remove one later: mise unuse -g <tool>"
}