#!/bin/bash
# Original Author: Alexander Epstein https://github.com/alexanderepstein

currentVersion="1.11.0"
configuredClient=""
configuredPython=""

## This function determines which http get tool the system has installed and returns an error if there isnt one
getConfiguredClient()
{
    if  command -v curl &>/dev/null ; then
      configuredClient="curl"
    elif command -v wget &>/dev/null ; then
      configuredClient="wget"
    elif command -v fetch &>/dev/null ; then
      configuredClient="fetch"
    else
      echo "Error: This tool reqires either curl, wget, or fetch to be installed."
      return 1
    fi

}

getConfiguredPython()
{
  if  command -v python2 &>/dev/null ; then
    configuredPython="python2"
  elif command -v python &>/dev/null ; then
    configuredPython="python"
  else
    echo "Error: This tool requires python 2 to be installed."
    return 1
  fi
}


python()
{
  case "$configuredPython" in
    python2) python2 "$@";;
    python) python "$@";;
  esac
}

## Allows to call the users configured client without if statements everywhere
httpGet()
{
  case "$configuredClient" in
    curl) curl -A curl -s "$@";;
    wget) wget -qO- "$@";;
    fetch) fetch -o "...";;
  esac
}


checkInternet()
{
  echo -e "GET http://google.com HTTP/1.0\n\n" | nc google.com 80 > /dev/null 2>&1 # query google with a get request
  if [ $? -eq 0 ]; then #check if the output is 0, if so no errors have occured and we have connected to google successfully
    return 0
  else
    echo "Error: no active internet connection" >&2 #sent to stderr
    return 1
  fi
}

## This function grabs information about a movie and using python parses the
## JSON response to extrapolate the information for storage
getMovieInfo()
{
  apiKey=946f500a # try not to abuse this it is a key that came from the ruby-scripts repo I link to.
  movie=$(echo "$@" | tr " " + ) ## format the inputs to use for the api
  export PYTHONIOENCODING=utf8 #necessary for python in some cases
  movieInfo=$(httpGet "http://www.omdbapi.com/?t=$movie&apikey=$apiKey") > /dev/null # query the server and get the JSON response
  checkResponse=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Response']" 2> /dev/null)
  if [[ $checkResponse == "False" ]];then { echo "No movie found" ; return 1 ;} fi ## check to see if the movie was found
  # The rest of the code is just extrapolating the data with python from the JSON response
  title=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Title']" 2> /dev/null)
  year=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Year']" 2> /dev/null)
  score=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Ratings'][1]['Value']" 2> /dev/null)
  rated=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Rated']" 2> /dev/null)
  genre=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Genre']" 2> /dev/null)
  director=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Director']" 2> /dev/null)
  actors=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Actors']" 2> /dev/null)
  plot=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['Plot']" 2> /dev/null)
  unset movieInfo # don't need this anymore
  unset checkResponse # don't need this anymore
}

# Prints the movie information out in a human readable format
printMovieInfo()
{
  echo
  echo '=================================================='
  echo "| Title: $title"
  echo "| Year: $year"
  if [[ $score != "" ]];then echo "| Tomato: $score";fi
  if [[ $rated != "N/A" && $rated != "" ]];then echo "| Rated: $rated";fi
  echo "| Genre: $genre"
  echo "| Director: $director"
  echo "| Actors: $actors"
  if [[ $plot != "N/A" && $plot != "" ]];then echo "| Plot: $plot"; fi
  echo '=================================================='
  echo
}


usage()
{
  echo "Movies tool"
  echo "Usage: movies [flag] or movies [movieToSearch]"
  echo "  -h Show the help"
  echo "  -v Get the tool version"
}

getConfiguredPython || exit 1
getConfiguredClient || exit 1
#checkInternet || exit 1 # check if we have a valid internet connection if this isnt true the rest of the script will not work so stop here

while getopts "uvh" opt; do
  case $opt in
    \?)
      echo "Invalid option: -$OPTARG" >&2
      exit 1
    ;;
    h)
      usage
      exit 0
    ;;
    v)
      echo "Version $currentVersion"
      exit 0
    ;;
    :)
      echo "Option -$OPTARG requires an argument." >&2
      exit 1
    ;;
  esac
done

if [[ $# == 0 ]]; then
  usage
elif [[ $1 == "update" ]];then
  update
elif [[ $1 == "help" ]];then
  usage
else
  getMovieInfo "$@" || exit 1 ## exit if we return 1 (chances are movie was not found)
  printMovieInfo ## print out the data
fi
