#!/usr/bin/env bash

source "$rvm_scripts_path/base"
source "$rvm_scripts_path/functions/gemset"

rvm_docs_ruby_string="$(__rvm_env_string)"
rvm_docs_ruby_string="${rvm_docs_ruby_string%%${rvm_gemset_seperator:-"@"}*}"

if [[ "$rvm_docs_ruby_string" == "system" || -z "$rvm_docs_ruby_string" ]]
then
  rvm_error "Currently 'rvm docs ...' does not work with non-rvm rubies."
  exit 1
fi

install_ruby_source()
{
  [[ -d "${rvm_src_path}/$rvm_docs_ruby_string" ]] || (
    action="fetch"
    rubies_string="$rvm_docs_ruby_string"
    source "$rvm_scripts_path"/manage
  ) || {
    rvm_error "'rvm docs ...' requires ruby sources to be available but fetching failed, run \`rvm reinstall $rvm_docs_ruby_string --disable-binary\`"
    exit 2
  }
}

rvm_docs_type="${rvm_docs_type:-rdoc}"

# Ensure we have the doc directories.
[[ -d "${rvm_docs_path:-"$rvm_path/docs"}" ]] ||
  mkdir -p "${rvm_docs_path:-"$rvm_path/docs"}/rdoc" "${rvm_docs_path:-"$rvm_path/docs"}/yard"

open_docs()
{
  if [[ -s "${rvm_docs_path:-"$rvm_path/docs"}/$rvm_docs_ruby_string/$rvm_docs_type/index.html" ]]
  then
    if
      [[ "${DESKTOP_SESSION}" == "gnome" ]] && builtin command -v gnome-open >/dev/null
    then
      gnome-open "${rvm_docs_path:-"$rvm_path/docs"}/$rvm_docs_ruby_string/$rvm_docs_type/index.html" &>/dev/null
    elif
      [[ -n "${XDG_SESSION_COOKIE}" || -n "${XDG_SESSION_ID}" ]] && builtin command -v xdg-open >/dev/null
    then
      xdg-open "${rvm_docs_path:-"$rvm_path/docs"}/$rvm_docs_ruby_string/$rvm_docs_type/index.html" &>/dev/null
    elif
      builtin command -v open >/dev/null
    then
      open "${rvm_docs_path:-"$rvm_path/docs"}/$rvm_docs_ruby_string/$rvm_docs_type/index.html"
    else
      rvm_error "None of open, xdg-open or gnome-open were found, in order to open the docs one of these two are required. \n(OR you can let me know how else to open the html in your browser from comand line on your OS :) )"
    fi
  else
    rvm_error "$rvm_docs_type docs are missing, perhaps run 'rvm docs generate' first?"
  fi
}

run_rdoc()
{
  update_rdoc
  if rdoc -V --help >/dev/null 2>&1
  then rdoc -V "$@" || return $?
  else rdoc    "$@" || return $?
  fi
}

generate_ri()
{
  install_ruby_source
  (
    __rvm_cd "${rvm_src_path}/$rvm_docs_ruby_string/"
    __rvm_log_command "generate_ri" "Generating ri documentation" run_rdoc -a --ri-site
  )
}

generate_rdoc()
{
  install_ruby_source
  (
    __rvm_cd "${rvm_src_path}/$rvm_docs_ruby_string/"
    if
      gem list | __rvm_grep ^hanna >/dev/null 2>&1
    then
      __rvm_log_command "generate_hanna" "Generating hanna documentation" \
        hanna -o "${rvm_docs_path:-"$rvm_path/docs"}/$rvm_docs_ruby_string/$rvm_docs_type" --inline-source --line-numbers --fmt=html
    else
      __rvm_log_command "generate_rdoc" "Generating rdoc documentation" \
        run_rdoc -a -o "${rvm_docs_path:-"$rvm_path/docs"}/$rvm_docs_ruby_string/$rvm_docs_type"
    fi
  )
}

generate_gems()
{
  __rvm_log_command "generate_gems" "Generating gems documentation" \command \gem rdoc --all --ri
}

update_rdoc()
{
  if
    (( rdoc_installed == 0 ))
  then
    rdoc_installed=1
    gem_install rdoc
  fi
}

install_rdoc_data()
{
  __rvm_use ${rvm_docs_ruby_string%%@*}@global
  update_rdoc
  gem list rdoc-data | __rvm_grep "^rdoc" || gem install rdoc-data
  rdoc-data --install
}

generate_docs()
{
  case "${rvm_docs_ruby_string}" in
    (*1.8.7*|*1.9.2*|*1.9.3*|*2.0.0*|jruby*|rbx*)
      __rvm_log_command install_rdoc_data "Installing rdoc-data" \
        install_rdoc_data || return $?
      ;;
    (*)
      generate_ri
      generate_rdoc
      ;;
  esac
  generate_gems
}

args=($*)
action="${args[0]}"
args=($(echo ${args[@]:1})) # Strip trailing / leading / extra spacing.
rdoc_installed=0

case "$action" in
  rdoc_data)     install_rdoc_data ;;
  generate)      generate_docs ;;
  generate-ri)   generate_ri   ;;
  generate-rdoc) generate_rdoc ;;
  generate-gems) generate_gems ;;
  open)          open_docs     ;;
  help)          rvm_help docs ;;
  *)
    rvm_help docs
    exit 1
    ;;
esac