#!/usr/bin/env bash

# Checks the rvmrc for the given directory. Note that if
# argument is passed, it will be used instead of pwd.
__rvm_project_rvmrc()
{
  export __rvm_project_rvmrc_lock
  : __rvm_project_rvmrc_lock:${__rvm_project_rvmrc_lock:=0}
  : __rvm_project_rvmrc_lock:$((__rvm_project_rvmrc_lock+=1))
  if (( __rvm_project_rvmrc_lock > 1 ))
  then return 0 # no nesting
  fi

  \typeset working_dir found_file rvm_trustworthiness_result save_PATH

  # Get the first argument or the pwd.
  working_dir="${1:-"$PWD"}"
  save_PATH="${PATH}"

  while :
  do
    if
      [[ -z "$working_dir" || "$HOME" == "$working_dir" || "${rvm_prefix:-}" == "$working_dir" || "$working_dir" == "." ]]
    then
      if (( ${rvm_project_rvmrc_default:-0} >= 1 ))
      then rvm_previous_environment=default
      fi
      if [[ -n "${rvm_previous_environment:-""}" ]] && (( ${rvm_project_rvmrc_default:-0} < 2 ))
      then __rvm_load_environment "$rvm_previous_environment"
      fi
      __rvm_file_env_check_unload
      unset rvm_current_rvmrc rvm_previous_environment
      break
    else
      if
        __rvm_project_dir_check "$working_dir" found_file
      then
        rvm_trustworthiness_result=0
        if
          [[ "${found_file}" != "${rvm_current_rvmrc:-""}" ]]
        then
          __rvm_conditionally_do_with_env __rvm_load_project_config "${found_file}" ||
          {
            rvm_trustworthiness_result=$?
            PATH="${save_PATH}" # restore PATH if project file load failed
            unset RVM_PROJECT_PATH
          }
        fi
        unset __rvm_project_rvmrc_lock
        return "$rvm_trustworthiness_result"
      else
        working_dir="${working_dir%/*}"
      fi
    fi
  done

  unset __rvm_project_rvmrc_lock
  return 1
}

__rvm_load_project_config()
{
  rvm_debug "__rvm_load_project_config $1"
  \typeset __gemfile _bundle_install
  \typeset -a __file_env_variables
  __file_env_variables=()
  __gemfile=""
  rvm_previous_environment="$(__rvm_env_string)"
  : rvm_autoinstall_bundler_flag:${rvm_autoinstall_bundler_flag:=0}
  case "$1" in
    (*/.rvmrc)
      __rvmrc_warning_display_for_rvmrc "$1"
      if
        __rvm_check_rvmrc_trustworthiness "$1"
      then
        __rvm_remove_rvm_from_path ; __rvm_conditionally_add_bin_path
        rvm_current_rvmrc="$1"
        __rvm_ensure_is_a_function

        unset GEM_HOME GEM_PATH
        rvm_ruby_string="${rvm_previous_environment/system/default}" rvm_action=use source "$1" ||
          return $?
      else
        return $?
      fi
      ;;

    (*/.versions.conf)
      __rvm_ensure_is_a_function
      rvm_current_rvmrc="$1"

      rvm_ruby_string="$( \command \tr -d '\r' <"$1" | __rvm_sed -n '/^ruby=/ {s/ruby=//;p;}' | tail -n 1 )"
      [[ -n "${rvm_ruby_string}" ]] || return 2
      rvm_gemset_name="$( \command \tr -d '\r' <"$1" | __rvm_sed -n '/^ruby-gemset=/ {s/ruby-gemset=//;p;}' | tail -n 1 )"
      rvm_create_flag=1 __rvm_use   || return 3

      __rvm_file_load_env_and_trust "$1" "env-"

      _bundle_install="$( \command \tr -d '\r' <"$1" | __rvm_sed -n '/^ruby-bundle-install=/ {s/ruby-bundle-install=//;p;}' )"
      if
        [[ -n "${_bundle_install}" ]]
      then
        if [[ -f "${_bundle_install}" ]]
        then __gemfile="${_bundle_install}"
        else __gemfile="${1%/*}/Gemfile"
        fi
      fi
      ;;

    (*/Gemfile)
      __rvm_ensure_is_a_function
      rvm_current_rvmrc="$1"

      rvm_ruby_string="$( \command \tr -d '\r' <"$1" | __rvm_sed -n '/^#ruby=/ {s/#ruby=//;p;}' | tail -n 1 )"
      [[ -n "${rvm_ruby_string}" ]] || {
        rvm_ruby_string="$(
          \command \tr -d '\r' <"$1" |
          __rvm_sed -n "s/[[:space:]]+rescue[[:space:]]+nil$//; /^\s*ruby[[:space:](]/ {s/^\s*ruby//; s/[[:space:]()'\"]//g; p;}" |
          \tail -n 1
        )"
        [[ -n "${rvm_ruby_string}" ]] || return 2

        rvm_ruby_string="${rvm_ruby_string%%\#*}"
        rvm_ruby_string="${rvm_ruby_string/,:engine=>/-}"
        rvm_ruby_string="${rvm_ruby_string/,engine:/-}"
        rvm_ruby_string="${rvm_ruby_string/,:engine_version=>[^,]*/}"
        rvm_ruby_string="${rvm_ruby_string/,engine_version:[^,]*/}"
        rvm_ruby_string="${rvm_ruby_string/,:patchlevel=>/-p}"
        rvm_ruby_string="${rvm_ruby_string/,patchlevel:/-p}"
      } #'
      rvm_gemset_name="$( \command \tr -d '\r' <"$1" | __rvm_sed -n '/^#ruby-gemset=/ {s/#ruby-gemset=//;p;}' | tail -n 1 )"
      if [[ -z "${rvm_gemset_name:-}" && -f "${1%/*}/.ruby-gemset" ]]
      then rvm_gemset_name="$( \command \tr -d '\r' <"${1%/*}/.ruby-gemset" )"
      fi
      __rvmrc_warning_display_for_Gemfile "$1"

      rvm_create_flag=1 __rvm_use   || return 3

      __rvm_file_load_env_and_trust "$1" "#ruby-env-"
      __gemfile="$1"
      ;;

    (*/.ruby-version|*/.rbfu-version|*/.rbenv-version)
      __rvm_ensure_is_a_function
      rvm_current_rvmrc="$1"

      rvm_ruby_string="$( \command \tr -d '\r' <"$1" )"
      if [[ -z "${rvm_ruby_string}" ]]
      then return 2
      fi
      if [[ -f "${1%/*}/.ruby-gemset" ]]
      then rvm_gemset_name="$( \command \tr -d '\r' <"${1%/*}/.ruby-gemset" )"
      else rvm_gemset_name=""
      fi
      rvm_create_flag=1 __rvm_use || return 3

      __rvm_file_load_env_and_trust "${1%/*}/.ruby-env"
      __rvm_file_load_env_and_trust "${1%/*}/.rbenv-vars"
      __gemfile="${1%/*}/Gemfile"
      ;;

    (*)
      rvm_error "Unsupported file format for '$1'"
      return 1
      ;;
  esac

  __rvm_file_set_env

  if
    [[ "${rvm_autoinstall_bundler_flag:-0}" == 1 && -n "${__gemfile:-}" && -f "${__gemfile:-}" ]]
  then
    __rvm_which bundle >/dev/null 2>&1 ||
      gem install --remote bundler
    bundle install --gemfile="${__gemfile}" | __rvm_grep -vE '^Using|Your bundle is complete'
  fi
}

# Detect if project file is in given PATH,
#
# Usage:
#   __rvm_project_dir_check <file_or_dir_to_check> [variable_name_to_set [default_value]]
#
# @param file_or_dir_to_check  file or directory to check if it's valid project file
# @param variable_name_to_set  when project file is found - set this variable to it's location
# @param default_value         when no project file found - set variable to this value
# @return                      0 - found, >0 - not found
# @env   RVM_PROJECT_PATH      unsets when not found, sets to project root when found
__rvm_project_dir_check()
{
  \typeset _found_file path_to_check variable variable_default
  \typeset -a _valid_files
  path_to_check="$1"
  variable="${2:-}"
  variable_default="${3:-}"
  _valid_files=(
    "$path_to_check"
    "$path_to_check/.rvmrc" "$path_to_check/.versions.conf" "$path_to_check/.ruby-version"
    "$path_to_check/.rbfu-version" "$path_to_check/.rbenv-version" "$path_to_check/Gemfile"
  )

  __rvm_find_first_file _found_file "${_valid_files[@]}" || true

  if
    [[ ! -s "$_found_file" ||
      "${_found_file}" == "$HOME/.rvmrc"
    ]]
  then
    _found_file=""
  elif
    [[ "${_found_file##*/}" == "Gemfile" ]] &&
    ! __rvm_grep    "^#ruby="  "$_found_file" >/dev/null &&
    ! __rvm_grep -E "^\s*ruby" "$_found_file" >/dev/null
  then
    _found_file=""
  fi

  if [[ -n "$variable" ]]
  then eval "$variable=\"\${_found_file:-$variable_default}\""
  fi

  if
    [[ -n "${_found_file:-$variable_default}" ]]
  then
    RVM_PROJECT_PATH="${_found_file:-$variable_default}"
    RVM_PROJECT_PATH="${RVM_PROJECT_PATH%/*}"
  else
    \typeset __result=$?
    unset RVM_PROJECT_PATH
    return $__result
  fi
}