#!/usr/bin/env bash

# Locates the executable passed as the first argument and detects if it
# is a text file and in a git repository and if so passes the URL to the
# raw file to the GIVECMD replacing URL2REPLACE.

if [ -z "$1" ]; then
  echo "usage: give <exefrompath>"
  exit
fi

# Executes the GIVECMD for the given cmd URL. Does not return.

give () {
  local cmd="$1"
  local givecmd="${2:-$GIVECMD}"
  local url path

  if [[ -z "${givecmd}" ]]; then
	  givecmd="wee URL2REPLACE"
  fi

  if [[ -z "${cmd}" ]]; then
    echo "Sorry, didn't catch that. Which command?"
    return -1
  fi

  path=$(which "${cmd}")
  if [[ -z "${path}" ]];then
    echo "Sorry, no $cmd in $path."
    return -1
  fi

  typ=$(file --mime-type "$path")
  typ=${typ#* }

  if [[ ! $typ =~ ^text ]];then
    echo "Doesn't appear to be a text file."
    return -1
  fi

  if [[ -n $(repos has "$cmd") ]];then
    cd ${path%/*}
    #local branch=$(git branch --show-current)
    # TODO detect main or master
    local branch=main
    if [[ $path =~ github.com/([^/]+)/([^/]+)/(.+) ]]; then
      local entity=${BASH_REMATCH[1]}
      local repo=${BASH_REMATCH[2]}
      local therest=${BASH_REMATCH[3]}
      url="https://raw.githubusercontent.com/$entity/$repo/$branch/$therest"
      givecmd=${givecmd//URL2REPLACE/$url}
      echo "${url}"
      $givecmd
    fi
    # TODO if host is gitlab then do something else
    # TODO support for gitlab and other repo hosting services
    # TODO full in the URL with the path
  fi
}

for i in "$@";do
  give "${i}" 
done