#!/usr/bin/env bash
USAGE="Usage: webdev [-h|--help] [-q|--quiet] uri|file"

# NOTE: These can either be set manually here or they
# NOTE: can be exported as environment variables (^-^)
# === Configuration === #
DEFAULT_BROWSER=${DEFAULT_BROWSER:-}
# ===================== #

# WARNING: Internal use only (do not modify!)
# === Internal Environment === #
QUIET=false
BROWSER=""
LOC=""
LOC_TYPE="" # file or uri
# ============================ #

# Quiet Echo - doesn't echo if QUIET is set
qecho() {
  if [[ "$QUIET" == false ]]; then
    echo "$@"
  fi
}

# Argument Parsing
for ARG in $@; do
  case $ARG in
    -h|--help)
      echo "$USAGE"
      exit 0
      ;;
    -q|--quiet)
      QUIET=true
      ;;
    -*)
      echo -e "[!] Unknown option \"$ARG\"\n$USAGE" >&2
      exit 1
      ;;
    *)
      # first unknown (non-option) argument assumed $LOC
      if [[ -n "$LOC" ]]; then
        LOC="$OPT"        
      else
        echo "[!] Unknown option \"$ARG\"\n$USAGE" >&2
        exit 1
      fi
      ;;
  esac
done
# ensure $LOC was set during argparse phase
if [[ -z "$LOC" ]]; then
  echo -e "[!] URI or file not specified\n$USAGE" >&2
fi

# Use DEFAULT_BROWSER or check XDG default-web-browser or fail
if [[ -n "$DEFAULT_BROWSER" ]]; then
  qecho "[+] Browser manually set to $DEFAULT_BROWSER"  
  qecho " >  Skipped checking XDG default-web-browser"
else
  qecho "[*] Lookup XDG default-web-browser"
  BROWSER=$(xdg-settings get default-web-browser 2>/dev/null)
  if [[ $? -eq 0 ]]; then
    BROWSER=${BROWSER%%.desktop}
    qecho "[+] Browser automatically set to $BROWSER"
  else
    echo "[!] Unknown browser girlypop :(" >&2
    echo " >  Either:" >&2
    echo " >    1. export DEFAULT_BROWSER" >&2
    echo " >    2. run \`xdg-settings set default-web-browser\`" >&2
    exit 1
  fi
fi
echo # linebreak

# Check if $LOC is a valid path
REALPATH=$(realpath "$LOC" 2>/dev/null)
if [ -f "$REALPATH"]; then
  LOC="file://$LOC" # open file directly via "file" protocol
fi
# Substitutions left intentionally unquoted (allows for providing args)
command $BROWSER $LOC