#!/bin/bash
# Copyright 2022 Tero Karvinen http://TeroKarvinen.com

shopt -s globstar # use /**/ to recurse into directories

function append() { # append text on every line
	SUF="$1"
	while read -r line
	do
	    echo -e "$line $SUF"
	done
}

function zipLs() { # list zip file contents, with file name on each line "foo.zip some/file.md"
	KSDICTS=$(realpath $KSDICTS)  # follow symlinks, dont print garbage over fzf TUI
	for ZIPFILE in $KSDICTS
	do
		#echo "Loading '$ZIPFILE'..." 1>&2
		zipinfo -1 "$ZIPFILE"|append "		$ZIPFILE"
	done
	
}

function cmdHelp() {
	cat <<-EOT
ks - Interactively search and read zip file dictionaries
ks [OPTIONS] [QUERY]
By default, opens a TUI to search and browse documentation

ks --grep foo # show all lines of documentation with string "foo"

- Very fast fuzzy find as you type
- Support regular zip files
Place your dictionaries (zip-files) under \$KSDICTS 
\$KSDICTS: $KSDICTS
Less than 50 line shell script, requires only bash, find, unzip and fzf. 
Dictionaries will be available on http://TeroKarvinen.com/ks
Zip files should can be created with 'zip -r --no-dir-entries mdn-2022.zip mdn-2022/',
and should only contain plain text files. Good: .md, .go, .txt Bad: .html, .jpg. 
Free software, GNU General Public License, version 2
ks version 0.5 Copyright 2022 Tero Karvinen http://TeroKarvinen.com/ks
EOT
}

function cmdGrep() {
	for ZIP in $KSDICTS
	do
		if [ ! -e "$ZIP" ]; then # skip leftover ** dir patterns
			continue
		fi
		zipgrep "$*" "$ZIP"
	done
}

# init
mkdir -p "$HOME/.config/ks/dictionaries/"

if [ -z "$KSDICTS" ]; then
	KSDICTS="/opt/ks/dictionaries/**/*.zip $HOME/.config/ks/dictionaries**/*.zip"
fi

case $1 in
	-h|--help) cmdHelp; exit;;
	-g|--grep) shift; cmdGrep "$@"; exit;;
esac

# main
echo "https://TeroKarvinen.com/ks" 1>&2
zipLs|fzf --layout=reverse --preview="unzip -ca '{2}' '{1}'" --preview-window="right:50%:wrap" --bind "shift-down:preview-page-down,shift-up:preview-page-up,enter:execute(unzip -ca '{2}' '{1}'|less -f)" --header="enter view, shift-down, shift-up to scroll preview; try /slashes/ around keyword; ctrl-C to quit." --query="$*" --no-mouse