#!/bin/bash

workdir="${XDG_DATA_HOME:-$HOME/.local/share/clipboard/history}"
maxsize="${CLIPBOARD_MAX_SIZE:-30M}"
histcount="${CLIPBOARD_HISTORY_COUNT:-300}"

red=$(tput setaf 1)
reset=$(tput sgr0)
delim="\034"
umask 077

mkdir -p "$workdir"
cd "$workdir" || exit

daemon(){
    echo "values may be subject to change"
    echo "  workdir:   $workdir"
    echo "  maxsize:   $maxsize"
    echo "  histcount: $histcount"
    echo "  current:   $(find "${workdir}" | wc | awk '{print $2}')"
    wl-paste -w "$0" on-copy
}

on-copy(){
    if [ -f "$workdir/.lock" ] ; then
        echo "script is currently locked."
        exit 0
    fi

    file="$(date +%s)"
    cat | sed -e 's/^[ \t]*//' >"$file"
    ext="$(file --mime-type "$file" | cut -d' ' -f2 | cut -d'/' -f2)"
    mv "$file" "$file.$ext"
    fdupes -idN .
    find . -type f -size 0 -delete
    find . -type f -size "+$maxsize" -delete
    find . -type f -print0 \
        | sort -zn \
        | head -z --lines="-$histcount"  \
        | xargs -r -0 rm
}


list(){
    find . -type f -printf '%P\0' \
        | sort -znr \
        | while IFS= read -r -d '' file ; do
        if [[ "$file" =~ \.(plain|x-python)$ ]]; then
            printf "%s${delim}" "$file" "${red}${reset} $(sed ':a;N;$!ba;s/\n/+/g' < "$file")"
        elif [[ "$file" =~ \.octet-stream$ ]]; then
            printf "%s${delim}" "$file" "${red}﫳${reset} $(sed ':a;N;$!ba;s/\n/+/g' < "$file")"
        else
            printf "%s${delim}" "$file" "${red}${reset} $file"
        fi
        printf '\0'
    done
}

parse-file(){
        echo "$1" | awk '{print $1}' FS="$delim"
}

on-select(){
        read -r -d '' result
        if [ -z "$result" ]; then
            exit 0
        fi
        (cat "$(parse-file "${result}")" || exit 1) | wl-copy
}

menu(){
       #--bind "del:execute-silent($0 delete '{}')+abort" \
       list | fzf --read0 +s \
         --info=hidden \
         --reverse \
         -d "${delim}" --nth ..2 --with-nth 2 \
          --bind="del:execute()" \
          --prompt='clip:: ' \
          --pointer='➜' \
          --color="gutter:0,prompt:4" \
          --no-multi \
          --preview "$0 preview '{}'" --preview-window=down:3:wrap --ansi \
          | on-select
}

usage(){
    cat <<EOF
Hello, this is the usuage menu. $0 supports the following arguments.

 - deamon :: starts a process that watches the clipboard, calling on-copy on copy.
 - on-copy :: saves clipped content to history folder. Dedups, and trims as well.
 - menu :: clip history menu using fzf.
 - list :: null terminated list that fzf populates. Need fo fzf reload.
 - lock :: prevents daemon/on-clip from saving value. Use for passwords, etc.
 - unlock :: like lock, but in reverse.
 - preview :: the preview used by fzf. Requires clip file.
EOF
}

preview(){
    local file 
    file="$(parse-file "$1")"

    if [ -f "$1" ]; then
        kitty +kitten icat --silent --stdin=no "$1"
        return
    fi
    
    printf $(bat -l bash --color always -pp "$file")
}

case "$1" in
    daemon|on-copy|menu|list)
        $1;;
    lock)
        touch "$workdir/.lock" ; echo "locked";;
    unlock)
        rm -f "$workdir/.lock" ; echo "unlocked";;
    preview)
        shift ; preview "$*";;
    *)
        usage;;
esac

exit;