#!/usr/bin/env bash

if [[ -z "$rvm_trace_flag" ]] ; then set +x ; else set -x ; fi

original_ruby_version=$rvm_ruby_version
original_ruby_string=$rvm_ruby_string

source $rvm_scripts_path/rvm

rvm_monitor_sleep="${rvm_monitor_sleep:-2}"

trap "rm -f $rvm_path/tmp/$$* > /dev/null 2>&1 ; exit" 0 1 2 3 15

timestamp() {
  if [[ "Darwin" = "$(uname)" ]] ; then
    echo $(stat -f "%m" $1)
  else
    echo $(stat -c "%Y" $1)
  fi
}

push_if_timestamp_changed() {
  file=$1
  file_timestamp=$(timestamp $file)

  eval "time=\$${framework}_timestamp"
  if [[ "$file_timestamp" -gt $time ]] ; then
    array_push "changed_${framework}_files" $file
  fi
}

update_timestamp() {
  if [[ -d "${1}/" ]] ; then
    touch "$rvm_path/${$}_${1}_timestamp"
    eval "${1}_timestamp=\$(timestamp \"$rvm_path/${$}_${1}_timestamp\")"
  fi
}

update_timestamp "test"
update_timestamp "spec"

while : ; do
  changed_test_files=() ; changed_spec_files=() ; changed_code_files=()

  for file in lib/**/*.rb lib/*.rb app/**/*.rb app/*.rb ; do
    if [[ -f "$file" ]] ; then push_if_timestamp_changed $file "code" ; fi
  done

  for framework in test spec ; do

    if [[ -d "$framework/" ]] ; then

      for file in ${framework}/**/*_${framework}.rb ${framework}/*_${framework}.rb ; do
        if [[ -f "$file" ]] ; then
          push_if_timestamp_changed $file $framework
        fi
      done

      if [[ "$(array_length "changed_${framework}_files")" -gt 0 ]] ; then
        rvm_ruby_version=$original_ruby_version
        rvm_ruby_string=$original_ruby_string
        if [[ "spec" = "$framework" ]] ; then
          rvm_action="spec"
          rvm_ruby_args="spec/spec_helper.rb ${changed_spec_files[*]}"
          __rvm_do

        elif [[ "test" = "$framework" ]] ; then
          rvm_action="ruby"
          rvm_ruby_args=" -r$(echo "${changed_test_files[*]}" | sed 's/ / -r/g') test/test_helper.rb"
          __rvm_do
        fi
        update=1
      fi

      if [[ "$(array_length "changed_code_files")" -gt 0 ]] ; then
        rvm_ruby_version=$original_ruby_version
        rvm_ruby_string=$original_ruby_string
        if [[ "spec" = "$framework" ]] ; then
          rvm_action="spec"
          rvm_ruby_args="spec/"
          __rvm_do
        elif [[ "test" = "$framework" ]] ; then
          rvm_action="rake"
          rvm_ruby_args="test"
          __rvm_do
        fi
        update=1
      fi
    fi

    if [[ "$update" -eq 1 ]] ; then
      update_timestamp $framework
    fi
  done

  unset update changed_test_files changed_spec_files

  sleep $rvm_monitor_sleep
done