#!/bin/sh
set -eu

if [ $# != 1 ]; then
  echo >&2 E: Need exactly one argument.
  return 1
fi

TSK="$1"

DATA="$(task _get "$TSK".data)"
DATATYPE="${DATA%%:*}"
DATAPAYL="${DATA#*:}"

case "$DATATYPE" in
  ('')
    echo >&2 I: No link data available for this task.
    exec task "$TSK"
    ;;

  (msgid)
    if command -v neomutt >/dev/null && command -v notmuch >/dev/null; then
      exec neomutt -f "notmuch://$HOME/mail/?query=thread:{mid:$DATAPAYL}"

    else
      exec mutt -f =store -e "push '<limit>~(=i\"$DATAPAYL\")<enter><search>=i\"$DATAPAYL\"<enter>'"

    fi
    ;;

  (url)
    exec sensible-browser "$DATAPAYL"
    ;;

  (file)
    if eval test -f "$DATAPAYL"; then
      case "$(file --mime-type "$DATAPAYL")" in
        (*": text/"*) eval exec sensible-editor "$DATAPAYL";;
        (*) eval exec run-mailcap --action=view "$DATAPAYL";;
      esac
    fi
    ;;

  (*)
    eval exec run-mailcap --action=view "$DATAPAYL"
    ;;

esac