#!/usr/bin/env bash
# Author: Alexander Epstein https://github.com/alexanderepstein
# Author: Navan Chauhan https://github.com/N3V0N

currentVersion="1.17.3"
configuredClient=""
configuredPython=""
APIKEY="b2f8880475c888056b6207067fbaa197"

## 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 http &>/dev/null; then
    configuredClient="httpie"
  elif command -v fetch &>/dev/null; then
    configuredClient="fetch"
  else
    echo "Error: This tool reqires either curl, wget, httpie or fetch to be installed." >&2
    return 1
  fi
}

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

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
}

if [[ $(uname) != "Darwin" ]]; then
  python()
  {
    case "$configuredPython" in
      python2) python2 "$@";;
      python) python "$@";;
    esac
  }
fi

checkInternet()
{
  httpGet github.com > /dev/null 2>&1 || { echo "Error: no active internet connection" >&2; return 1; } # query github with a get request
}

printMovieInfo()
{
  echo
  echo "=========================================="
  echo "| Title: $name"
  echo "| Language: $language"
  echo "| Genre: $genres"
  echo "| Runtime: $runtime mins"
  echo "| User Rating: $voteAverage/10.0 with $voteCount votes"
  echo "| Plot: $plot"
  echo "=========================================="
  echo
}

getMovieInfo()
{
  title=$1
  encodedTitle=$( echo $title | sed 's/ /%20/g' );
  movieSearchInfo=$( httpGet "https://api.themoviedb.org/3/search/movie?query=$encodedTitle&language=en-US&api_key=$APIKEY")
  movieID=$(echo $movieSearchInfo | python -c "import sys, json; print json.load(sys.stdin)['results'][0]['id']" 2> /dev/null)
  if [[ $movieID == "" ]];then { echo "Error: could not find a movie matching the title $title"; return 1; }; fi
  movieInfo=$(httpGet "https://api.themoviedb.org/3/movie/$movieID?api_key=$APIKEY")
  name=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['original_title']" 2> /dev/null )
  plot=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['overview']" 2> /dev/null )
  language=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['original_language']" 2> /dev/null )
  runtime=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['runtime']" 2> /dev/null )
  voteCount=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['vote_count']" 2> /dev/null )
  genreOne=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['genres'][0]['name']" 2> /dev/null )
  genreTwo=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['genres'][1]['name']" 2> /dev/null )
  genreThree=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['genres'][2]['name']" 2> /dev/null )
  genres=$(echo "$genreOne $genreTwo $genreThree" | tr " " ",")
  voteAverage=$(echo $movieInfo | python -c "import sys, json; print json.load(sys.stdin)['vote_average']" 2> /dev/null )
}

getConfiguredClient || exit 1
if [[ "$(uname)" == "Linux" ]];then getConfiguredPython || exit 1; fi
checkInternet || exit 1

if [ "$1" == "-h" ]; then
  usage
  exit 0
fi

args=$(echo "$@")
getMovieInfo $args
printMovieInfo