#!/usr/bin/bash

### Help 
Help() {
	helpF="/tmp/fpf-help"
    { printf "\n%s\n" "Use fzf to search and install with Pacman or Yay/Paru"
    printf "\n%s\n\t%s\n\t\t%s\n" "SYNTAX" \
	"fpf [-a| --aur] [-l| --list-installed] [-la| --list-aur-installed]" "[R| --remove] [-o| --orphans] [-h | --help]" 
	printf "\n%s\n\t%s\n\t\t%s\n\n\t%s\n\t\t%s\n" "EXAMPLE" "For official repo search:" \
	"fpf [pkg name]" "For AUR search:" "fpf -a [pkg name]"
	printf "\n%s\n" "OPTIONS"
	printf "\t%s\n\\t\t%s\n\n" "-l, --list-installed" "Search/List installed packages from official repo"
	printf "\t%s\n\\t\t%s\n\n" "-la, --list-aur-installed" "Search/List installed packages from AUR"
	printf "\t%s\n\\t\t%s\n\n" "-a, --aur" "Search/List and install from AUR with Yay"
	printf "\t%s\n\\t\t%s\n\n" "-R, -remove" "Search/List installed packages for removal"
	printf "\t%s\n\\t\t%s\n\n" "-o, --orphans" "Search/List orphaned packages for removal"
	printf "\t%s\n\\t\t%s\n\n" "-h, --help" "Print this help screen"; } > "$helpF"
}

KBINDS() {
	kbindF="/tmp/fpf-kbinds"
	{ printf "\n%s\n\n  %s\n" "Keybinds:" "GLOBAL"
	printf "\t%s\t%s\n" "'ctrl + h'" "Show help in the preview window"
	printf "\t%s\t%s\n" "'ctrl + k'" "Show the keybinds in the preview window" 
	printf "\t%s\t%s\n" "'ctrl + /'" "Toggle the preview window" 
	printf "\t%s\t%s\n" "'ctrl + n'" "Move to the next selected item"
	printf "\t%s\t%s\n" "'ctrl + b'" "Back to previoius selected item"
	printf "\n  %s\n" "AUR"
	printf "\t%s\t%s\n" "'ctrl + p'" "Preview the highlighted pkgbuild file"
	printf "\t%s\t%s\n" "'ctrl + x'" "Return to the highlighted pkg info"; } > "$kbindF"
}

#	Check things are up to date
UpdateInfos() {
	[ -f /var/lib/pacman/sync/core.files ] || { printf "Syncing files database"; sudo pacman -Fy; }
    d1=$(stat -c %y /var/lib/pacman/sync/core.files)
    d2=$(stat -c %y /var/lib/pacman/sync/core.db)
	d1="${d1:0:10}"
	d2="${d2:0:10}"
	[[ "${d2///-/}" > "${d1//-/}" ]] && { printf "Files database is out of date\nSyncing now..."; sudo pacman -Fy; }
}

UpdateAurInfos() {
	printf "Syncing AUR package information..."
	[[ ! -d /tmp/aur ]] && mkdir -p /tmp/aur
	zcat <(curl  https://aur.archlinux.org/packages-meta-ext-v1.json.gz) |
	jq --compact-output '.[] |
	{ Name, Description } ' |
	awk -F'"' '{ printf "%-20s\t%s\n", $4, $8}' > /tmp/aur/fpf-packages-meta
	while IFS= read -r pkgName; do
		grep -w "^$pkgName " /tmp/aur/fpf-packages-meta >> /tmp/aur/fpf-installed
	done < <(pacman -Qqm)
	sort <(comm -23 <(cat /tmp/aur/fpf-packages-meta | sort) <( cat /tmp/aur/fpf-installed | sort)) \
	<(comm -12 <( cat /tmp/aur/fpf-packages-meta | sort) <(cat /tmp/aur/fpf-installed | sort) |
	awk -F"\t" '{print $1" \033[32m*\033[0m  ", $2}') -o /tmp/aur/fpf-packages-meta
}

#	Check AUR helper
AHELPR=""
if [[ -z "$AHELPR" ]]
then
    if [[ -f /usr/bin/paru ]]
    then 
    	AHELPR="paru"
    elif [[ -f /usr/bin/yay ]]
    then
    	AHELPR="yay"
    else
    	printf "Suitable AUR Helper not found.\nPlease install \"paru\" or \"yay\" to continue."
		exit 1
	fi
fi

### Official Repo
#	Get Official package list, sort, mark installed, preview infos and finally hand off to pacman for install
Official() {
	printf "Setting things up..."
	KBINDS
	sort <(comm -23 <(expac -S '%-20n\t%d' | sort) <(expac '%-20n\t%d' | sort)) <(comm -12 <(expac -S '%-20n\t%d' | sort) \
	<(expac '%-20n\t%d' | sort) | awk -F"\t" '{print $1"\033[32m*\033[0m  ", $2}') &>/dev/null  >  /tmp/fpf-packages
  	cat /tmp/fpf-packages |
  	fzf -q "$1" -e -m \
  	--preview='cat <(pacman -Si {1}) <(pacman -Fl {1} | awk "{print \$2}")' \
  	--preview-window=55%:wrap:border-sharp \
  	--layout=reverse \
  	--marker='>>' \
  	--header="$(echo -e '\n Select packages to install\n (use TAB to toggle selection)\n\n')" \
  	--info=hidden \
  	--ansi \
  	--margin="2%,1%,2%,1%" \
  	--cycle \
	--tiebreak=begin,chunk,length \
	--bind 'focus:transform-preview-label:echo ⌇ {1} ⌇' \
	--bind=ctrl-k:preview:"cat /tmp/fpf-kbinds" \
	--bind=ctrl-h:preview:"cat /tmp/fpf-help" \
	--bind 'ctrl-/:change-preview-window(hidden|)' \
	--bind ctrl-n:next-selected,ctrl-b:prev-selected |
  	awk '{print $1}' |
  	sed -e 's/\*$//' |
  	xargs -ro sudo pacman -S
}

#	List installed pkgs
Installed() {
	sort <(pacman -Qqn) > /tmp/fpf-installed_packages
	echo "$(echo -e ' Select packages to print info\n (use TAB to toggle selection)';
	cat /tmp/fpf-installed_packages)" > /tmp/fpf-installed_packages
	cat /tmp/fpf-installed_packages |
	fzf -q "$1" -e -m \
	--preview='cat <(pacman -Qik {1}) <(echo "") <(pacman -Fl {1} | awk "{print \$2}")' \
	--preview-window=65%:wrap \
	--layout=reverse \
	--marker='>>' \
	--header-lines=2 \
	--info=hidden \
	--ansi \
	--margin="2%,1%,2%,1%" \
	--cycle \
	--bind 'focus:transform-preview-label:echo ⌇ {1} ⌇' \
	--bind=ctrl-k:preview:"cat /tmp/fpf-kbinds" \
	--bind=ctrl-h:preview:"cat /tmp/fpf-help" \
	--bind 'ctrl-/:change-preview-window(hidden|)' \
	--bind ctrl-n:next-selected,ctrl-b:prev-selected |
	xargs -ro pacman -Qik
}

#	Remove installed pkgs
Remove() {
	sort <(pacman -Qqs) > /tmp/fpf-installed_packages
	echo "$(echo -e ' Select packages to remove\n (use TAB to toggle selection)';
	cat /tmp/fpf-installed_packages)" > /tmp/fpf-installed_packages
	cat /tmp/fpf-installed_packages |
	fzf -q "$1" -e -m \
	--preview='cat <(pacman -Si {1} 2>/dev/null || yay -Qi {1} 2>/dev/null || paru -Qi {1}) <(pacman -Ql {1} | awk "{print \$2}")' \
	--preview-window=65%:wrap \
	--layout=reverse \
	--marker='>>' \
	--header-lines=2 \
	--info=hidden \
	--ansi \
	--margin="2%,1%,2%,1%" \
	--cycle \
	--bind 'focus:transform-preview-label:echo ⌇ {1} ⌇' \
	--bind=ctrl-k:preview:"cat /tmp/fpf-kbinds" \
	--bind=ctrl-h:preview:"cat /tmp/fpf-help" \
	--bind 'ctrl-/:change-preview-window(hidden|)' \
	--bind ctrl-n:next-selected,ctrl-b:prev-selected |
	xargs -ro sudo pacman -Rsn
}

### AUR
#	Get AUR package database, remove unwanted lines, sort, mark installed, preview infos and finally hand off to yay for install
Aur() {
	[ -f /tmp/aur/packages-meta ] || UpdateAurInfos
	d1=$(stat -c %y /tmp/aur/fpf-packages-meta)
	d1="${d1:0:10}"
	d2=$(date -I'date')
	[[ "${d2///-/}" > "${d1//-/}" ]] && UpdateAurInfos		
	cat /tmp/aur/fpf-packages-meta |
	fzf -q "$1" -e -m \
	--preview='cat <(yay -Si {1} 2>/dev/null || paru -Si {1}) <(pacman -Ql {1} 2>/dev/null | awk "{print \$2}")' \
	--preview-window=55%:wrap:border-sharp \
	--layout=reverse \
	--marker='>>' \
	--header="$(echo -e ' Select packages to install\n (use TAB to toggle selection)\n')" \
	--info=hidden \
	--ansi \
	--margin="2%,1%,2%,1%" \
	--cycle \
	--tiebreak=begin,chunk,length \
	--bind 'focus:transform-preview-label:echo ⌇ {1} ⌇' \
	--bind=ctrl-k:preview:"cat /tmp/fpf-kbinds" \
	--bind=ctrl-h:preview:"cat /tmp/fpf-help" \
	--bind ctrl-n:next-selected,ctrl-b:prev-selected \
	--bind 'ctrl-/:change-preview-window(hidden|)' \
	--bind=ctrl-p:preview:'curl --silent https://aur.archlinux.org/cgit/aur.git/plain/PKGBUILD\?h={1}' \
	--bind=ctrl-x:preview:'cat <(yay -Si {1} 2>/dev/null || paru -Si {1}) <(pacman -Ql {1} 2>/dev/null | awk "{print \$2}")' |
	awk '{print $1}' |
	sed -e 's/\*$//' |
	xargs -ro $AHELPR -S
}

#	List installed pkgs only from AUR
AurInstalled() {
	sort <(pacman -Qqm) > /tmp/fpf-aur_installed_packages
	echo "$(echo -e ' Select packages to print info\n (use TAB to toggle selection)';
	cat /tmp/fpf-aur_installed_packages)" > /tmp/fpf-aur_installed_packages
	cat /tmp/fpf-aur_installed_packages |
	fzf -q "$1" -e -m \
	--preview 'cat <(pacman -Qik {1}) <(echo "") <(pacman -Ql {1} | awk "{print \$2}")' \
	--preview-window=65%:wrap \
	--layout=reverse \
	--marker='>>' \
	--header-lines=2 \
	--info=hidden \
	--ansi \
	--margin="2%,1%,2%,1%" \
	--cycle \
	--bind 'focus:transform-preview-label:echo ⌇ {1} ⌇' \
	--bind=ctrl-k:preview:"cat /tmp/fpf-kbinds" \
	--bind=ctrl-h:preview:"cat /tmp/fpf-help" \
	--bind 'ctrl-/:change-preview-window(hidden|)' \
	--bind ctrl-n:next-selected,ctrl-b:prev-selected \
	--bind=ctrl-p:preview:'curl --silent https://aur.archlinux.org/cgit/aur.git/plain/PKGBUILD\?h={1}' \
	--bind=ctrl-x:preview:'cat <(pacman -Si {1} 2>/dev/null || yay -Qi {1} 2>/dev/null ||
	paru -Qi {1}) <(pacman -Ql {1} | awk "{print \$2}")' |
	xargs -ro pacman -Qik
}

### ORPHANS
#	List orphaned packages and remove selected 
Orphans() {
	sort <(pacman -Qtdq) > /tmp/fpf-orphaned
	echo "$(echo -e ' Select packages to remove\n (use TAB to toggle selection)'; cat /tmp/fpf-orphaned)" > /tmp/fpf-orphaned
	cat /tmp/fpf-orphaned |
	fzf -q "$1" -e -m \
	--preview='cat <(pacman -Qik {1} 2>/dev/null || yay -Qi {1} 2>/dev/null ||
	paru -Qi {1}) <(pacman -Ql {1} | awk "{print \$2}")' \
	--preview-window=65%:wrap \
	--layout=reverse \
	--marker='>>' \
	--header-lines=2 \
	--info=hidden \
	--ansi \
	--margin="2%,1%,2%,1%" \
	--cycle \
	--bind 'focus:transform-preview-label:echo ⌇ {1} ⌇' \
	--bind=ctrl-k:preview:"cat /tmp/fpf-kbinds" \
	--bind=ctrl-h:preview:"cat /tmp/fpf-help" \
	--bind ctrl-n:next-selected,ctrl-b:prev-selected \
	--bind 'ctrl-/:change-preview-window(hidden|)'  |
	xargs -ro sudo pacman -Rsn	
}

### MAIN

#	Update the files database
UpdateInfos
#   Test for AUR option, if not run with pacman
if [[ ! "$1" =~ ^- ]]; then
	Official "$1"
else
	for opt in "$@"; do
		case $opt in
    		-a|--aur)
				Aur "$2"
				;;
       		-l|--list-installed)
       			Installed "$2"
       			;;
       		-la|--list-aur-installed)
       			AurInstalled "$2"
       			;;
       		-o|--orphans)
       			Orphans "$2"
       			;;
       		-R|--remove)
       			Remove "$2"
       			;;
    		-h|--help)
       			Help
				cat "/tmp/fpf-help"
       			;;       			
    		-*)
				Help
				sed -i "2s/.*/Invalid Usage/" /tmp/fpf-help
				head -n 13 "/tmp/fpf-help"
       			;;
    	esac
	done
fi