#!/usr/bin/env bash

mkgist() {
    local token="$(< ~/.gisttoken)"
    if [ $? -ne 0 ]; then
        echo failed to read ~/.gisttoken -- do you have one? >&2
        echo https://github.com/settings/applications >&2
        return 1
    fi

    local public=true anon=0 desc=
    while [ $# -gt 0 ]; do
        case "$1" in
        -p) public=false;;
        -a) anon=1;;
        -d) [ $# -lt 2 ] && desc= || desc="$2"
            shift;;
         *) echo "usage: $0 [-p] [-a] [-d {description}]" >&2
            return 1
        esac
        shift
    done

    local head=
    [ $anon -eq 0 ] && head="Authorization: token $token"

    local rf="$(mktemp)"
    if [ ! -O "$rf" ]; then
        echo failed to create temporary output file >&2
        return 1
    fi

    # TODO: sanitize $desc
    curl 'https://api.github.com/gists' -sid@- -H "$head" -o "$rf" << EOF
{
    "description": "$desc",
    "public": $public,
    "files": { ".dummy": { "content": "." } }
}
EOF

    if [ $? -ne 0 ]; then
        rm "$rf"
        return 1
    fi

    sed -n '/Location/{s@.*/@@;p;q}' "$rf" | tr -d '\r ' | while read; do
        echo "https://gist.github.com/$REPLY"
        git clone "https://gist.github.com/$REPLY.git"
        [ $? -eq 0 ] && (
            cd "$REPLY"
            git rm .dummy
            git remote set-url origin "git@gist.github.com:$REPLY.git"
        )
    done

    rm "$rf"
}
mkgist "$@"