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

global currentVersion := '"1.11.1'"
global configuredClient := ''""
global configuredPython := ''""

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

}

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


proc python
{
  matchstr $configuredPython {
    python2 { python2 @Argv}
    python { python @Argv}
  }
}

## Allows to call the users configured client without if statements everywhere
proc httpGet
{
  matchstr $configuredClient {
    curl { curl -A curl -s @Argv}
    wget { wget -qO- @Argv}
    fetch { fetch -o "..."}
  }
}


proc 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 test $Status -eq 0 { #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
  }
}

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

proc update
{
  # Author: Alexander Epstein https://github.com/alexanderepstein
  # Update utility version 1.2.0
  # To test the tool enter in the defualt values that are in the examples for each variable
  global repositoryName := '"Bash-Snippets'" #Name of repostiory to be updated ex. Sandman-Lite
  global githubUserName := '"alexanderepstein'" #username that hosts the repostiory ex. alexanderepstein
  global nameOfInstallFile := '"install.sh'" # change this if the installer file has a different name be sure to include file extension if there is one
  global latestVersion := $[httpGet https://api.github.com/repos/$githubUserName/$repositoryName/tags | grep -Eo '"name":.*?[^\\]",'| head -1 | grep -Eo "[0-9.]+] #always grabs the tag without the v option

  if [[ $currentVersion == "" || $repositoryName == "" || $githubUserName == "" || $nameOfInstallFile == "" ]]{
    echo "Error: update utility has not been configured correctly." > !2
    exit 1
  } elif [[ $latestVersion == "" ]]{
    echo "Error: no active internet connection" > !2
    exit 1
  } else {
    if [[ "$latestVersion" != "$currentVersion" ]] {
      echo "Version $latestVersion available"
      echo -n "Do you wish to update $repositoryName [Y/n]: "
      read -r answer
      if [[ "$answer" == "Y" || "$answer" == "y" ]] {
        cd  ~ || do { echo 'Update Failed' ; exit 1 ; }
        if [[ -d  ~/$repositoryName ]] { rm -r -f $repositoryName  ||  do { echo "Permissions Error: try running the update as sudo"; exit 1; } ; }
        git clone "https://github.com/$githubUserName/$repositoryName" || do { echo "Couldn't download latest version" ; exit 1; }
        cd $repositoryName ||  do { echo 'Update Failed' ; exit 1 ;}
        git checkout "v$latestVersion" !2 > /dev/null || git checkout $latestVersion !2 > /dev/null || echo "Couldn't git checkout to stable release, updating to latest commit."
        chmod a+x install.sh #this might be necessary in your case but wasnt in mine.
        ./$nameOfInstallFile "update" || exit 1
        cd ..
        rm -r -f $repositoryName ||  do { echo "Permissions Error: update succesfull but cannot delete temp files located at ~/$repositoryName delete this directory with sudo"; exit 1; }
      } else {
        exit 1
      }
    } else {
      echo "$repositoryName is already the latest version"
    }
  }

}

proc usage
{
  echo "Movies"
  echo "Description: Provides relevant information about a certain movie."
  echo "Usage: movies [flag] or movies [movieToSearch]"
  echo "  -u Update Bash-Snippet Tools"
  echo "  -h Show the help"
  echo "  -v Get the tool version"
  echo "Examples:"
  echo "  movies Argo"
  echo "  movies Inception"
}

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 {
  matchstr $opt {
    \? {
      echo "Invalid option: -$OPTARG" > !2
      exit 1
    }
    h {
      usage
      exit 0
    }
    v {
      echo "Version $currentVersion"
      exit 0
    }
    u {
      update
      exit 0
    }
    : {
      echo "Option -$OPTARG requires an argument." > !2
      exit 1
    }
  }
}

if [[ $# == 0 ]] {
  usage
} elif [[ $1 == "update" ]]{
  update
} elif [[ $1 == "help" ]]{
  usage
} else {
  getMovieInfo @Argv || exit 1 ## exit if we return 1 (chances are movie was not found)
  printMovieInfo ## print out the data
}
(CommandList
  children: [
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      keyword: Assign_None
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      spids: [7]
    )
    (Assignment
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      pairs: [(assign_pair lhs:(LhsName name:configuredClient) op:Equal rhs:{(DQ )} spids:[12])]
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                      spids: [71]
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                      terminator: <Op_Semi ";">
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                        )
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                      spids: [94]
                    )
                  ]
                  spids: [77 91]
                )
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              else_action: [
                (C {(echo)} 
                  {(DQ ("Error: This tool reqires either curl, wget, or fetch to be installed."))}
                )
                (ControlFlow token:<ControlFlow_Return return> arg_word:{(1)})
              ]
              spids: [100 115]
            )
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          spids: [28]
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      spids: [24 27]
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                  action: [
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                  action: [
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                      spids: [168]
                    )
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                  spids: [151 165]
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              ]
              spids: [174 189]
            )
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          spids: [125]
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            )
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                  action: [(C {(fetch)} {(-o)} {(DQ (...))})]
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              spids: [248 254 300]
            )
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      body: 
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          children: [
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                      (EscapedLiteralPart token:<Lit_EscapedChar "\\n">) (EscapedLiteralPart token:<Lit_EscapedChar "\\n">)
                    )
                  }
                )
                (SimpleCommand
                  words: [{(nc)} {(google.com)} {(80)}]
                  redirects: [
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                      op_id: Redir_Great
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                      arg_word: {(/dev/null)}
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                    )
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              negated: False
            )
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                  action: [(ControlFlow token:<ControlFlow_Return return> arg_word:{(0)})]
                  spids: [-1 355]
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              ]
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                  redirects: [(Redir op_id:Redir_GreatAnd fd:-1 arg_word:{(2)} spids:[375])]
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              ]
              spids: [366 387]
            )
          ]
          spids: [310]
        )
      spids: [306 309]
    )
    (FuncDef
      name: getMovieInfo
      body: 
        (BraceGroup
          children: [
            (Assignment
              keyword: Assign_None
              pairs: [(assign_pair lhs:(LhsName name:apiKey) op:Equal rhs:{(946f500a)} spids:[405])]
              spids: [405]
            )
            (Assignment
              keyword: Assign_None
              pairs: [
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                                ]
                                negated: False
                              )
                            ]
                          )
                        left_token: <Left_CommandSub "$(">
                        spids: [413 430]
                      )
                    }
                  spids: [412]
                )
              ]
              spids: [412]
            )
            (C {(export)} {(Lit_VarLike "PYTHONIOENCODING=") (utf8)})
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                                    ("&apikey=") ($ VSub_Name "$apiKey")
                                  )
                                }
                              )
                            ]
                          )
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                                      {(python)}
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                                        (DQ 
                                          (
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                                          )
                                        )
                                      }
                                    ]
                                    redirects: [
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                                        fd: 2
                                        arg_word: {(/dev/null)}
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                                      )
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                                  )
                                ]
                                negated: False
                              )
                            ]
                          )
                        left_token: <Left_CommandSub "$(">
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                      )
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                )
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                  action: [
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            )
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                                    words: [
                                      {(python)}
                                      {(-c)}
                                      {
                                        (DQ 
                                          (
"import sys, json; print json.load(sys.stdin)['Ratings'][1]['Value']"
                                          )
                                        )
                                      }
                                    ]
                                    redirects: [
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              ]
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            )
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              keyword: Assign_None
              pairs: [
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                                      {(-c)}
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                (assign_pair
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                                                              (
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                                                      terminator: <Op_Semi ";">
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                                                  spids: [1203]
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                                          terminator: <Op_Semi ";">
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                                              spids: [1302]
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                                      spids: [1356]
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                              spids: [-1 1150]
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                          spids: [1375 1383]
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                      spids: [-1 1091]
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                  spids: [1386 1397]
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              spids: [1071 1400]
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          spids: [896]
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    (AndOr children:[(C {(getConfiguredClient)})(C {(exit)} {(1)})] op_id:Op_DPipe)
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                  spids: [1600 1601 1621 -1]
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              spids: [1520 1524 1624]
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          op_id: Op_DPipe
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        (C {(printMovieInfo)})
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      spids: [1685 1709]
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)