#!/bin/bash

# bugs notice
some_bugs() {
	echo "Done
	PS: You saw some bugs? Let me know on project page:
	https://github.com/oSoWoSo/DistroHopper
	Happy distro hopping...		zenobit"
}

# installation
check_gui_dependencies() {
	if ! command -v yad >/dev/null 2>&1; then
		echo "You are missing yad...
		It's needed for GUI!" >&2
	fi
}

check_tui_dependencies() {
	if ! command -v fzf >/dev/null 2>&1; then
		echo "You are missing fzf...
		It's needed for TUI!" >&2
	fi
}

check_quickemu_dependencies() {
	if ! command -v yad >/dev/null 2>&1; then
		echo "You are missing some quickemu dependencies......
		They are needed for running VMs!" >&2
	fi
}

set_variables() {
	progname="${progname:="${0##*/}"}"
	version="0.5"
	#GTK_THEME="alt-dialog"
	DH_CONFIG_DIR="$HOME/.config/distrohopper"
	DH_CONFIG="$DH_CONFIG_DIR/distrohopper.conf"
	DH_ICON_DIR="/usr/share/icons/distrohopper"
	PREFIX="/usr/bin/"
	TERMINAL=sakura
	replace='"!"'
	source "$DH_CONFIG"  >/dev/null 2>&1 \
		&& cd "$VMS_DIR" \
		&& export "DH_CONFIG_DIR" \
			"DH_CONFIG" \
			"DH_ICON_DIR" \
			"PREFIX" \
			"TERMINAL" \
			"replace" \
		|| echo "Not installed yet!" \
		&& VMS_DIR="$(pwd)" \
		&& DH_CONFIG_DIR="$(pwd)" \
		&& DH_ICON_DIR="$(pwd)"/icons \
		&& export "VMS_DIR" \
			"DH_CONFIG_DIR" \
			"DH_ICON_DIR" \
			"TERMINAL" \
			"replace" \
		&& echo "Using current: $VMS_DIR directory!"
	echo "DistroHopper v$version"
	echo "quickemu v$(quickemu --version)
	"
	# Set traps to catch the signals and exit gracefully
	trap "exit" INT
	trap "exit" EXIT
}

run_once() {
	source config/distrohopper.conf
}

create_structure() {
	echo "creating config dir..."
	mkdir -p "$DH_CONFIG_DIR"
	echo "creating ready dir..."
	mkdir -p "$DH_CONFIG_DIR/ready"
	echo "creating supported dir..."
	mkdir -p "$DH_CONFIG_DIR/supported"
	echo "creating icons dir as root..."
	sudo mkdir -p "$DH_ICON_DIR"
	echo "copying to config dir..."
	cp -r * "$DH_CONFIG_DIR/"
	echo "copying icons to root..."
	sudo cp "icons/"* "$DH_ICON_DIR/"
}

set_dir() {
	NEWDIR="$(yad --file --directory --title="Where to save VMs?")"
	VMS_DIR="$NEWDIR"
	echo "VMS_DIR=\"$VMS_DIR\"
	export \"VMS_DIR\"" >> "$DH_CONFIG"
	export "VMS_DIR"
}

install_prereq() {
	# (Void linux)
	sudo xbps-install -S qemu bash coreutils grep jq procps-ng python3 util-linux sed spice-gtk swtpm usbutils wget xdg-user-dirs xrandr unzip zsync socat
}

dh_to_bin() {
	sudo cp dh quickget quickemu macrecovery windowskey "$PREFIX"
	# quickget also to config directory for adding new distros...
	cp quickget "$DH_CONFIG_DIR"
}

install_process() {
	check_tui_dependencies
	check_gui_dependencies
	check_quickemu_dependencies
	echo "Sourcing config..." \
	 && run_once \
	 && echo "Creating directory structure..." \
	 && create_structure \
	 && echo "Setting up directory..." \
	 && set_dir \
	 && echo "Installing needed..." \
	 && echo "For now voidlinux only" \
	 && install_prereq \
	 && echo "Installing DistroHopper to bin..." \
	 && dh_to_bin
}

# basic
renew_supported() {
	# get supported VMs
	quickget | sed 1d | cut -d':' -f2 | grep -o '[^ ]*' > "$DH_CONFIG_DIR/supported.md"
	while read -r get_name; do
		vm_desktop=$(echo "$get_name" | tr ' ' '_')
		releases=$(quickget "$vm_desktop" | grep 'Releases' | cut -d':' -f2 | sed 's/^ //')
		editions=$(quickget "$vm_desktop" | grep 'Editions' | cut -d':' -f2 | sed 's/^ //')
		icon_name="$DH_ICON_DIR/$get_name"
		if [ -f "$icon_name.svg" ]; then
			icon_file="$icon_name.svg"
		elif [ -f "$icon_name.png" ]; then
			icon_file="$icon_name.png"
		else
			icon_file="$DH_ICON_DIR/tux.svg"
		fi
		# Check if there are editions
		if [ -z "$editions" ]; then
			# Create desktop file for VMs without editions
			desktop_file_content="[Desktop Entry]
Type=Application
Name=$get_name
releases=$releases
replace=$replace
Exec=sh -c 'cd \"$VMS_DIR\" && yad --form --field=\"Release:CB\" \"${releases// /$replace}\" | cut -d\"|\" -f1 | xargs -I{} sh -c \"quickget $get_name {}\"'
Icon=$icon_file
Categories=System;Virtualization;"
			echo "$desktop_file_content" > "$DH_CONFIG_DIR"/supported/"$vm_desktop".desktop
		else
			# Create desktop file for VMs with editions
			desktop_file_content="[Desktop Entry]
Type=Application
Name=$get_name
releases=$releases
editions=$editions
replace=$replace
Exec=sh -c 'cd \"$VMS_DIR\" && yad --form --separator=\" \" --field=\"Release:CB\" \"${releases// /$replace}\" --field=\"Edition:CB\" \"${editions// /$replace}\" | xargs -I{} sh -c \"quickget $get_name {}\"'
Icon=$icon_file
Categories=System;Virtualization;"
			echo "$desktop_file_content" > "$DH_CONFIG_DIR"/supported/"$vm_desktop".desktop
		fi
	done < "$DH_CONFIG_DIR"/supported.md
}

renew_ready() {
    cd "$VMS_DIR" || exit 1
    # check for VMs .conf files (ready to run VMs)
    if [ ! -e *.conf ]; then
        echo "No .conf files found"
        return
    fi
    for vm_conf in *.conf; do
        vm_desktop=$(basename "$VMS_DIR/$vm_conf" .conf)
        # Use fuzzy matching to find the best matching icon file (ready to run VMs)
        icon_name=$(basename "$VMS_DIR/$vm_conf" .conf | cut -d'-' -f -2)
        icon_file=$(find "$DH_ICON_DIR" -type f -iname "${icon_name// /}.*")
        # If no icon was found, try shorter name (ready to run VMs)
        if [ -z "$icon_file" ]; then
            icon_name=$(basename "$VMS_DIR/$vm_conf" .conf | cut -d'-' -f1)
            icon_file=$(find "$DH_ICON_DIR" -type f -iname "${icon_name// /}.*")
        elif [ -z "$icon_file" ]; then
            icon_file="$DH_ICON_DIR/tux.svg"
        fi
        # content of desktop files (ready to run VMs)
        desktop_file_content="[Desktop Entry]
Type=Application
Name=$vm_desktop
Exec=sh -c 'cd \"$VMS_DIR\" && quickemu -vm \"$vm_conf\"'
Icon=$icon_file
Categories=System;Virtualization;"
        # create desktop files (ready to run VMs)
        echo "$desktop_file_content" > "$DH_CONFIG_DIR"/ready/"$vm_desktop".desktop
    done
}

run_gui() {
	key=$((RANDOM % 9000 + 1000))
	yad --plug="$key" --tabnum=1 --monitor --icons --listen --read-dir="$DH_CONFIG_DIR"/ready --sort-by-name --no-buttons --borders=0 --icon-size=46 --item-width=76 &
	yad --plug="$key" --tabnum=2 --monitor --icons --listen --read-dir="$DH_CONFIG_DIR"/supported --sort-by-name --no-buttons --borders=0 --icon-size=46 --item-width=76 &
	yad --dynamic --notebook --key="$key" --monitor --listen --window-icon="$DH_ICON_DIR"/hop.svg --width=900 --height=900 --title="DistroHopper" --tab="run VM" --tab="download VM" --tab="settings" --button "test"
}

run_tui() {
	printf '%s: v.%s\nquickemu: v.%s\n\n VMs dir: %s\n\n' "$progname" "$version" "$(quickemu --version)" "$(pwd)"
	vms=(*.conf)
	# Dependency check: check if fzf is installed and can be executed
	if ! command -v fzf >/dev/null 2>&1; then
		echo "You are missing fzf..." && exit 255
	fi
	printf ' Prepared VMs:\n-------------\n\n'
	# Check if there are any VMs
	if [ ${#vms[@]} -eq 0 ]; then
		echo "No VMs found."
		exit 1
	fi
	# Print the names of the available VMs
	printf "%s\n" "${vms[@]%.*}"
	echo "-------------"
	# Action prompt
	printf " Do you want to create a new VM? (c)
	 or run an existing one? (press anything)\n"
	read -rn 1 -s start
	case $start in
		c )
			todo="create"
		;;
	esac
	# If the user chose to create a new VM
	if [ "$todo" = "create" ]; then
		os=$(quickget | sed 1d | cut -d':' -f2 | grep -o '[^ ]*' | fzf --cycle --header='Choose OS to download
 or CTRL-c or ESC to quit')
		# If the OS is Windows
		if [ "$os" = windows ]; then
			answer=$(echo "Default English
Choose other language" | fzf --cycle)
			# If the user wants another windows language
			if [ "$answer" = "Choose other language" ]; then
				wrelease=$(echo "8
10
11" | fzf --cycle)
				# get window language list
				wlend=$(($(cat quickget | sed '/Arabic/,$!d' | grep -n '}' | cut -d':' -f1 | head -n 1) - 1))
				# get windows language
				wlang=$(cat quickget | sed '/Arabic/,$!d' | head -n $wlend | cut -d'=' -f2 | tail -c +2 | head -c -2 | sed 's/^[ \t]*//' | fzf --cycle --header='Choose Language
 or CTRL-c or ESC to quit')
				# downloading windows
				printf '\n Trying to download Windows %s %s...\n\n' "$wrelease" "$wlang"
				quickget "windows" "$wrelease" "$wlang"
			fi
		fi
		# Get the release and edition to download, if necessary
		choices=$(quickget "$os" | sed 1d)
		if [ "$(echo "$choices" | wc -l)" = 1 ]; then
			# get release
			release=$(echo "$choices" | grep 'Releases' | cut -d':' -f2 | grep -o '[^ ]*' | fzf --cycle --header='Choose Release
 or CTRL-c or ESC to quit')
			# downloading
			printf '\n Trying to download %s %s...\n\n' "$os" "$release"
			quickget "$os" "$release"
		else
			# get release
			release=$(echo "$choices" | grep 'Releases' | cut -d':' -f2 | grep -o '[^ ]*' | fzf --cycle --header='Choose Release
 or CTRL-c or ESC to quit')
			# get edition
			edition=$(echo "$choices" | grep 'Editions' | cut -d':' -f2 | grep -o '[^ ]*' | fzf --cycle --header='Choose Edition
 or CTRL-c or ESC to quit')
			# downloading
			printf '\n Trying to download %s %s %s...\n\n' "$os" "$release" "$edition"
			quickget "$os" "$release" "$edition"
		fi
		# choose VM to run
		choosed=$(echo "$(ls ./***.conf 2>/dev/null | sed 's/\.conf$//')" | fzf --cycle --header='Choose VM to run
 or CTRL-c or ESC to quit')
		# Run choosed VM
		printf '\n Starting %s...\n\n' "$choosed"
		quickemu -vm "$choosed.conf"
	fi
}

# more
isos_to_dir() {
	yad --file --directory > target
	cd "$VMS_DIR" || exit 1
	cp */*.iso "$target"
}

add_distro() {
	TMP_DIR="/tmp"
	yad --form --field="Pretty name" "" --field="Name" "" --field="Releases" "" --field="Editions" "" --field="URL" "" --field="ISO" "" --field="Checksum file" "" > ${TMP_DIR}/template.tmp
	PRETTY_NAME="$(cat ${TMP_DIR}/template.tmp | cut -d'|' -f1)"
	NAME="$(cat ${TMP_DIR}/template.tmp | cut -d'|' -f2)"
	RELEASES="$(cat ${TMP_DIR}/template.tmp | cut -d'|' -f3)"
	EDITIONS="$(cat ${TMP_DIR}/template.tmp | cut -d'|' -f4)"
	URL="$(cat ${TMP_DIR}/template.tmp | cut -d'|' -f5)"
	ISO="$(cat ${TMP_DIR}/template.tmp | cut -d'|' -f6)"
	CHECKSUM_FILE="$(cat ${TMP_DIR}/template.tmp | cut -d'|' -f7)"
	echo "    $NAME)           PRETTY_NAME=$PRETTY_NAME;;
" >  ${TMP_DIR}/${NAME}.tmp
	{ echo "    $NAME \\
"; echo "function releases_$NAME() {
	echo $RELEASES
}
"; echo "function editions_$NAME() {
	echo $EDITIONS
}
"; echo "function get_$NAME() {
	local EDITION="${1:-}"
	local HASH=""
	local ISO="$ISO"
	local URL="$URL"
	HASH=\"$(wget -q -O- "${URL}/${CHECKSUM_FILE}" | grep "(${ISO}" | cut -d' ' -f4)\"
	echo \"${URL}/${ISO} ${HASH}\"
}
"; } >> ${TMP_DIR}/${NAME}.tmp
	meld "${TMP_DIR}/${NAME}.tmp $DH_CONFIG_DIR/quickget"
}

# run
set_variables
case "$1" in
d) set_dir;;
i) echo "Starting installation..." && install_process;;
s) echo "Updating supported VMs..." && renew_supported;;
t) echo "You are master! Running TUI..." && run_tui;;
r) echo "Updating ready VMs..." && renew_ready;;
a) echo "Adding new distro started..." && add_distro;;
h) echo "Possible arguments are:
	d	Set where VMs are stored
	i	Install DistroHopper
	s	Update supported VMs
	t	Run TUI instead of GUI
	r	Update ready to run VMs
	a	Add new distro to quickget
	h	Show this help
	o	Copy all ISOs to target dir (for Ventoy)
	p	Push changed quickget to quickemu project";;
o) echo "Copying ISOs to dir. It will take some time..." && isos_to_dir;;
p) echo "Nothing here yet!";;
*) echo "You can show help if you run 'dh h'
 Starting DistroHopper GUI..." && run_gui;;
esac

some_bugs

exit 0