#!/bin/sh

set -e
[ -n "$DEBUG" ] && set -x

windowstyle='border-sharp'

exec_hist=/tmp/fzf-interactive_exec-hist
if [ ! -f "$exec_hist" ]; then
	touch "$exec_hist"
fi

_cat='cat'
if bat --version >/dev/null; then
	_cat='bat --color=always --style=numbers,changes'
fi
_ls='ls'
if eza --version >/dev/null; then
	_ls='eza --classify --group --header --group-directories-first --color=always'
fi

case "$1" in
help | -h | --help)
	printf "usage: fzfez [exec|git-log|git-tag|git-branches|rg|fd|vimwiki|*]\n"
	exit 1
	;;

exec)
	uniq "$exec_hist" |
		grep -v '^$' |
		fzf \
			--header "${FZFEZ_HEADER:-EXEC:} select or enter a command, {} is \"$2\"" \
			--bind 'tab:replace-query' \
			--bind 'enter:print-query' |
		tee -a $exec_hist |
		sed "s#{}#$2#g" |
		sh -s
	exit $?
	;;

_preview)
	case "$(xdg-mime query filetype "$2")" in
	inode/directory) $_ls -la "$2" ;;
	text/*) $_cat "$2" ;;
	application/javascript) $_cat "$2" ;;
	application/x-yaml) $_cat "$2" ;;
	application/x-shellscript) $_cat "$2" ;;
	application/json) jq "$2" || $_cat "$2" ;;
	application/x-compressed-tar) tar -tvf "$2" ;;
	application/pdf) pdftotext "$2" - ;;
	image/*) mediainfo "$2" ;;
	video/* | audio/*) mediainfo "$2" ;;
	*) file "$2" ;;
	esac
	;;
_preview-detach) # invoke for media files
	case "$(xdg-mime query filetype "$2")" in
	inode/directory) swx -f vifm "$2" ;;
	image/*) swx -f imv "$2" ;;
	video/* | audio/*) swx -f mpv "$2" ;;
	application/pdf) swx -f zathura "$2" ;;
	text/*) swx -t ${EDITOR} "$2" ;;
	*) env FZFEZ_HEADER='PREVIEW-DETACH' $0 exec "$2" ;;
	esac
	;;
_batpreview) # highlights the line matching the query, usage: _batpreview FILENAME QUERY
	_filename=${2}
	if [ -z "${_filename}" ]; then
		exit 1
	fi
	_query=${3}
	if [ -n "${_query}" ]; then
		_ln=$(grep -n ${_query} "${_filename}" | head -n1 | cut -d: -f1)
		[ -n "${_ln}" ] && opts="${opts} -H ${_ln}"
	fi
	shift 3
	exec bat ${*} ${opts} "${_filename}"
	;;

	# | sed 's#^refs/##' \
	# | sed 's#^remotes/##' \
	# | sed 's#^heads/##' \
git-branches)
	git rev-parse HEAD >/dev/null 2>&1 || exit 1
	git branch -a --format='%(refname)' |
		grep -v 'remote' |
		cut -d'/' -f3 |
		sort |
		env FZFEZ_HEADER='BRANCHES: c-o (switch)' \
			$0 \
			--ansi --no-sort --tac \
			--preview 'git log --color=always --oneline --graph --date=short ..{} && echo && git diff --color=always --stat {}' \
			--preview-window "${windowstyle},right:70%" \
			--bind "ctrl-o:execute(git switch {})+abort"
	;;

git-tags)
	git rev-parse HEAD >/dev/null 2>&1 || exit 1
	git tag --sort -version:refname |
		cut -d' ' -f1 |
		sed 's#^refs/##' |
		sed 's#^remotes/##' |
		sed 's#^heads/##' |
		env FZFEZ_HEADER='TAGS:' \
			$0 \
			--ansi --no-sort \
			--preview 'git show --color=always {} | head -${LINES}' \
			--preview-window "${windowstyle},right:70%"
	;;

git-log)
	git log --color=always --oneline |
		env FZFEZ_HEADER='LOG:' \
			$0 \
			--ansi --no-sort --reverse \
			--preview 'echo {} | cut -d\  -f1 | xargs git show --color=always --pretty=full --stat --patch' \
			--preview-window "${windowstyle},right:50%" |
		cut -d' ' -f1 |
		xargs -r -i git log -1 --pretty=%H {}
	;;

neuron)
	NOTESDIR=$HOME/.zk
	rg --no-heading --line-number --with-filename --sort path . "${NOTESDIR}" |
		env FZFEZ_HEADER='NEURON:' \
			$0 \
			--tac -d ':' -n .. \
			--preview 'bat --style=plain --color=always --highlight-line={2} {1}' \
			--preview-window "${windowstyle},+{2}-20" |
		awk -F: "{system(\"${EDITOR}\" \" -c \" \$2 \" \" \$1)}"
	;;

rg)
	shift
	rg --files-with-matches "$@" |
		env FZFEZ_HEADER='RG:' \
			$0 \
			--preview "rg \"$*\" --color=always --no-filename --glob='{}' --context=5 --line-number" \
			--preview-window "${windowstyle}"
	;;

fd)
	shift
	fd "$@" |
		env FZFEZ_HEADER='FD: c-o (xdg-open)' \
			$0 \
			--ansi --reverse \
			--bind "ctrl-o:execute(xdg-open {})+abort" \
			--preview-window "${windowstyle},hidden"
	;;

clipboard | cb)
	shift
	wl-paste | env FZFEZ_HEADER='CLIPBOARD:' $0
	;;

mail)
	shift
	exec fzf-notmuch "$@"
	;;

*)
	fzf \
		--header "${FZFEZ_HEADER:-FZF:} c-x (exec), ? (preview), c-space (preview-detach), c-s (sort)" \
		--preview "${0} _preview {}" \
		--preview-window "${windowstyle},hidden" \
		--multi \
		--bind 'enter:replace-query+print-query' \
		--bind 'ctrl-a:select-all' \
		--bind '?:toggle-preview' \
		--bind 'ctrl-s:toggle-sort' \
		--bind "ctrl-space:execute(${0} _preview-detach {})" \
		--bind "ctrl-y:yank" \
		--bind "ctrl-e:execute(${EDITOR} {})+abort" \
		--bind "ctrl-x:execute(env FZFEZ_HEADER=EXEC: ${0} exec {})+abort" \
		--height '50%' \
		--reverse \
		$FZFEZ_OPTS \
		"$@"
	;;
esac