#!/bin/bash

github_api_token=$(cat $SETTING_DIR/tokens/github)
user=typebrook
folder=~/git/gist

mkdir -p $folder
index=$folder/index

_update() {
    # get the list of gists
    curl -s -H "Authorization: token $github_api_token" https://api.github.com/users/$user/gists |\
    jq '.[] | "\( .html_url ) \(.files | keys | length) \( .description )"' |\
    tr -d '"' | tac | nl |\
    while read line_num link file_num description; do
        echo $line_num $link $file_num $(echo $description | cut -c -70)
    done | tee $index

    # clone repos which are not in the local machine
    comm -13 <(find $folder -maxdepth 1 -type d | sed '1d; s#.*/##' | sort) \
             <(cat $index | cut -d' ' -f2 | sed 's#.*/##' | sort) |\
    xargs -I{} git clone git@github.com:{}.git $folder/{}
}

_go_to_gist() {
    GIST_ID=$(cat $index | sed -n "$1"p | cut -d' ' -f2 | sed -r 's#.*/##')
    echo this gist is at $folder/$GIST_ID
    cd $folder/$GIST_ID && tig --all 2> /dev/null
}

_show_detail() {
    GIST_ID=$(cat $index | sed -n "$1"p | cut -d' ' -f2 | sed -r 's#.*/##')
    curl -s -H "Authorization: token $github_api_token" https://api.github.com/gists/$GIST_ID
}

# FIXME cannot upload a file
_create() {
    curl -v -H "Authorization: token $github_api_token" \
        --data "$(generate_post_data $1 | tee json)" \
        https://api.github.com/gists
}

generate_post_data() {
cat <<EOF 
{
    "public": true,
    "files": { "$1": {"content": "$(cat $1 | sed 's/"/\\\"/g' | tr '\n' ',')"}},
    "description": $2
}
EOF
}


if [[ $# -eq 0 ]]; then
    cat $index 
    exit 0
fi

case "$1" in
  update | u)
    _update
    ;;

  detail | d)
    _show_detail $2
    ;;

  create | c)
    _create $2
    ;;

  *)
    _go_to_gist $1
    ;;
esac