#!/bin/sh
set -e

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 exa --version >/dev/null; then
	_ls='exa --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 "${FZFEZ_HEADER:-EXEC:} select or enter a command, {} is \"${FZFEZ_EXEC_SELECTION}\"" \
			--bind 'tab:replace-query' \
			--bind 'esc:print-query' \
			--bind 'enter:replace-query+accept' \
		| tee -a $exec_hist >/dev/null \
		| sed "s#{}#$2#g"  \
		| sh -x -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)   exa -la "$2" ;;
	image/*)           swx -f mvi "$2" ;;
	video/*|audio/*)   swx -f mpv "$2" ;;
	application/pdf)   swx -f zathura "$2" ;;
	test/*)            swx -t ${EDITOR} "$2" ;;
	*)                 env FZFEZ_HEADER='PREVIEW-DETACH' $0 exec "$2" ;;
	esac
	;;

git-branches)
	git rev-parse HEAD > /dev/null 2>&1 || exit 1
	git branch -a --sort=refname --format='%(refname)' \
		| cut -d' ' -f1 \
		| sed 's#^refs/##' \
		| sed 's#^remotes/##' \
		| sed 's#^heads/##' \
		| env FZFEZ_HEADER='BRANCHES:' \
			$0 \
			--ansi --no-sort --reverse --tac \
			--preview 'git log --color=always --oneline --graph --date=short {} | head -${LINES}' \
			--preview-window right:70% \
			--bind "ctrl-o:execute(git checkout {})+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:' \
			$0 \
			--ansi --no-sort --reverse \
			--preview 'git show --color=always {} | head -${LINES}' \
			--preview-window 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 right:50% \
		| cut -d' ' -f1 \
		| xargs -r -i git log -1 --pretty=%H {}
	;;

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

vimwiki)
	shift
	fd -t f -e md "${1:-.*}" "$HOME/wiki" \
		| sed "s#^$HOME/wiki/##" \
		| sed 's#.md$##' \
		| env FZFEZ_HEADER='VIMWIKI:' \
			$0 \
			--print-query \
			--preview="$_cat -n $HOME/wiki/{}.md" \
		| xargs -r -i nvim +VimwikiIndex +VimwikiGoto\ {}
	;;

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

*)
	fzf \
		--header "${FZFEZ_HEADER:-FZF:} c-x (exec), ? (preview), c-space (preview-detach), c-s (sort)" \
		--preview "${0} _preview {}" \
		--preview-window ':hidden' \
		--bind '?:toggle-preview' \
		--bind 'ctrl-s:toggle-sort' \
		--bind "ctrl-space:execute(${0} _preview-detach {})" \
		--bind "ctrl-x:execute(env FZFEZ_HEADER=EXEC: FZFEZ_EXEC_SELECTION={} ${0} exec {})+accept" "$@" ;;
esac