#!/bin/sh -e

. ../common-script.sh

# Function to install Timeshift
install_timeshift() {
    clear
    printf "%b\n" "${YELLOW}Checking if Timeshift is installed...${RC}"

    if ! command_exists timeshift; then
        case "$PACKAGER" in
            pacman)
                "$ESCALATION_TOOL" "${PACKAGER}" -S --noconfirm timeshift
                ;;
            dnf|zypper|apt-get|nala)
                "$ESCALATION_TOOL" "${PACKAGER}" install -y timeshift
                ;;
            *)
                printf "%b\n" "${RED}Unsupported pacakge manager.${RC}"
        esac
    else
        printf "%b\n" "${GREEN}Timeshift is already installed.${RC}"
    fi
}

# Function to display the menu
display_menu() {
    clear
    printf "%b\n" "${CYAN}Timeshift CLI Automation${RC}"
    printf "%b\n" "${CYAN}1) List Snapshots${RC}"
    printf "%b\n" "${CYAN}2) List Devices${RC}"
    printf "%b\n" "${CYAN}3) Create Snapshot${RC}"
    printf "%b\n" "${CYAN}4) Restore Snapshot${RC}"
    printf "%b\n" "${CYAN}5) Delete Snapshot${RC}"
    printf "%b\n" "${CYAN}6) Delete All Snapshots${RC}"
    printf "%b\n" "${CYAN}7) Exit${RC}"
}

# Function to list snapshots
list_snapshots() {
    printf "%b\n" "${CYAN}Listing snapshots...${RC}"
    "$ESCALATION_TOOL" timeshift --list-snapshots
}

# Function to list devices
list_devices() {
    printf "%b\n" "${CYAN}Listing available devices...${RC}"
    "$ESCALATION_TOOL" timeshift --list-devices
}

# Function to create a new snapshot
create_snapshot() {
    printf "%b" "${CYAN}Enter a comment for the snapshot (optional): ${RC}"
    read -r COMMENT
    printf "%b" "${CYAN}Enter snapshot tag (O,B,H,D,W,M) (leave empty for no tag): ${RC}"
    read -r TAG

    if [ -z "$COMMENT" ] && [ -z "$TAG" ]; then
        printf "%b\n" "${CYAN}Creating snapshot with no comment or tag...${RC}"
        "$ESCALATION_TOOL" timeshift --create
    elif [ -z "$TAG" ]; then
        printf "%b\n" "${CYAN}Creating snapshot with no tag...${RC}"
        "$ESCALATION_TOOL" timeshift --create --comments "$COMMENT"
    else
        printf "%b\n" "${CYAN}Creating snapshot with tag: $TAG...${RC}"
        "$ESCALATION_TOOL" timeshift --create --comments "$COMMENT" --tags "$TAG"
    fi

    if [ $? -eq 0 ]; then
        printf "%b\n" "${GREEN}Snapshot created successfully.${RC}"
    else
        printf "%b\n" "${RED}Snapshot creation failed.${RC}"
    fi
}

# Function to restore a snapshot
restore_snapshot() {
    list_snapshots

    printf "%b" "${CYAN}Enter the snapshot name you want to restore: ${RC}"
    read -r SNAPSHOT
    printf "%b" "${CYAN}Enter the target device (e.g., /dev/sda1): ${RC}"
    read -r TARGET_DEVICE
    printf "%b" "${CYAN}Do you want to skip GRUB reinstall? (y/N): ${RC}"
    read -r SKIP_GRUB

    if [ "$SKIP_GRUB" = "y" ] || [ "$SKIP_GRUB" = "Y" ]; then
        "$ESCALATION_TOOL" timeshift --restore --snapshot "$SNAPSHOT" --target-device "$TARGET_DEVICE" --skip-grub --yes
    else
        printf "%b\n" "${CYAN}Enter GRUB device (e.g., /dev/sda): ${RC}"
        read -r GRUB_DEVICE
        "$ESCALATION_TOOL" timeshift --restore --snapshot "$SNAPSHOT" --target-device "$TARGET_DEVICE" --grub-device "$GRUB_DEVICE" --yes
    fi

    if [ $? -eq 0 ]; then
        printf "%b\n" "${GREEN}Snapshot restored successfully.${RC}"
    else
        printf "%b\n" "${RED}Snapshot restore failed.${RC}"
    fi
}

# Function to delete a snapshot
delete_snapshot() {
    list_snapshots

    printf "%b" "${CYAN}Enter the snapshot name you want to delete: ${RC}"
    read -r SNAPSHOT

    printf "%b\n" "${YELLOW}Deleting snapshot $SNAPSHOT...${RC}"
    "$ESCALATION_TOOL" timeshift --delete --snapshot "$SNAPSHOT" --yes

    if [ $? -eq 0 ]; then
        printf "%b\n" "${GREEN}Snapshot deleted successfully.${RC}"
    else
        printf "%b\n" "${RED}Snapshot deletion failed.${RC}"
    fi
}

# Function to delete all snapshots
delete_all_snapshots() {
    printf "%b\n" "${RED}WARNING: This will delete all snapshots!${RC}"
    printf "%b" "${CYAN}Are you sure? (y/N): ${RC}"
    read -r CONFIRMATION

    if [ "$CONFIRMATION" = "y" ] || [ "$CONFIRMATION" = "Y" ]; then
        printf "%b\n" "${CYAN}Deleting all snapshots...${RC}"
        "$ESCALATION_TOOL" timeshift --delete-all --yes
        if [ $? -eq 0 ]; then
            printf "%b\n" "${GREEN}All snapshots deleted successfully.${RC}"
        else
            printf "%b\n" "${RED}Failed to delete snapshots.${RC}"
        fi
    else
        printf "%b\n" "${RED}Operation cancelled.${RC}"
    fi
}

main_menu() {
    while true; do
        display_menu
        printf "%b\n" "${CYAN}Select an option (1-7): ${RC}"
        read -r OPTION

        case $OPTION in
            1) list_snapshots ;;
            2) list_devices ;;
            3) create_snapshot ;;
            4) restore_snapshot ;;
            5) delete_snapshot ;;
            6) delete_all_snapshots ;;
            7) printf "%b\n" "${GREEN}Exiting...${RC}"; exit 0 ;;
            *) printf "%b\n" "${RED}Invalid option. Please try again.${RC}" ;;
        esac
        printf "%b\n" "${CYAN}Press Enter to continue...${RC}"
        read -r dummy
    done
}

checkEnv
checkEscalationTool
install_timeshift  
main_menu