#!/bin/bash

shopt -s nullglob

# We use this to make sure the cache files are sorted bytewise
export LC_COLLATE=C

cache_file=/tmp/clipmenu.$USER/line_cache

# It's okay to hardcode `-l 8` here as a sensible default without checking
# whether `-l` is also in "$@", because the way that dmenu works allows a later
# argument to override an earlier one. That is, if the user passes in `-l`, our
# one will be ignored.
chosen_line=$(sed 's/^[^|]\+|//' "$cache_file" | tac | uniq | dmenu -l 8 "$@")

[[ $chosen_line ]] || exit 1

# Naive, but performant path, only follow expensive path if it doesn't work
out_line=$(grep -F "|$chosen_line" "$cache_file")
out_length=$(wc -l <<< "$out_line")

if (( out_length == 1 )); then
    # Cheap path succeded
    file=${out_line%%|*}
elif (( out_length > 1 )); then
    # Cheap path failed
    while IFS='|' read -r full_file first_line; do
        if [[ $first_line == "$chosen_line" ]]; then
            file=$full_file
            break
        fi
    done <<< "$out_line"
else
    # We didn't find this in cache
    printf 'FATAL: %s not in cache, run clipmenu-fsck\n' "$chosen_line" >&2
    exit 2
fi


for selection in clipboard primary; do
    if type -p xsel >/dev/null 2>&1; then
        xsel -i --"$selection" < "$file"
    else
        xclip -sel "$selection" < "$file"
    fi
done