#!/bin/bash
#
# This file is part of MagiskOnWSALocal.
#
# MagiskOnWSALocal is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# MagiskOnWSALocal is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with MagiskOnWSALocal.  If not, see <https://www.gnu.org/licenses/>.
#
# Copyright (C) 2023 LSPosed Contributors
#

if [ ! "$BASH_VERSION" ]; then
    echo "Please do not use sh to run this script, just execute it directly" 1>&2
    exit 1
fi
cd "$(dirname "$0")" || exit 1
abort() {
    [ "$1" ] && echo "ERROR: $1"
    echo "Dependencies: an error has occurred, exit"
    exit 1
}
require_su() {
    if test "$(id -u)" != "0"; then
        if [ "$(sudo id -u)" != "0" ]; then
            echo "sudo is required to run this script"
            abort
        fi
    fi
}

echo "Checking and ensuring dependencies"
check_dependencies() {
    command -v whiptail >/dev/null 2>&1 || command -v dialog >/dev/null 2>&1 || NEED_INSTALL+=("whiptail")
    command -v pip >/dev/null 2>&1 || NEED_INSTALL+=("python3-pip")
    command -v aria2c >/dev/null 2>&1 || NEED_INSTALL+=("aria2")
    command -v 7z >/dev/null 2>&1 || NEED_INSTALL+=("p7zip-full")
    command -v unzip >/dev/null 2>&1 || NEED_INSTALL+=("unzip")
}
check_dependencies
osrel=$(sed -n '/^ID_LIKE=/s/^.*=//p' /etc/os-release)
declare -A os_pm_install
# os_pm_install["/etc/redhat-release"]=yum
os_pm_install["/etc/arch-release"]=pacman
os_pm_install["/etc/gentoo-release"]=emerge
os_pm_install["/etc/SuSE-release"]=zypper
os_pm_install["/etc/debian_version"]=apt-get
# os_pm_install["/etc/alpine-release"]=apk

declare -A PM_UPDATE_MAP
PM_UPDATE_MAP["yum"]="check-update"
PM_UPDATE_MAP["pacman"]="-Syu --noconfirm"
PM_UPDATE_MAP["emerge"]="-auDU1 @world"
PM_UPDATE_MAP["zypper"]="ref"
PM_UPDATE_MAP["apt-get"]="update"
PM_UPDATE_MAP["apk"]="update"

declare -A PM_INSTALL_MAP
PM_INSTALL_MAP["yum"]="install -y"
PM_INSTALL_MAP["pacman"]="-S --noconfirm --needed"
PM_INSTALL_MAP["emerge"]="-a"
PM_INSTALL_MAP["zypper"]="in -y"
PM_INSTALL_MAP["apt-get"]="install -y"
PM_INSTALL_MAP["apk"]="add"

declare -A PM_UPGRADE_MAP
PM_UPGRADE_MAP["apt-get"]="upgrade -y"
PM_UPGRADE_MAP["zypper"]="up -y"

check_package_manager() {
    for f in "${!os_pm_install[@]}"; do
        if [[ -f $f ]]; then
            PM="${os_pm_install[$f]}"
            break
        fi
    done
    if [[ "$osrel" = *"suse"* ]]; then
        PM="zypper"
    fi
    if [ -n "$PM" ]; then
        readarray -td ' ' UPDATE_OPTION <<<"${PM_UPDATE_MAP[$PM]} "
        unset 'UPDATE_OPTION[-1]'
        readarray -td ' ' INSTALL_OPTION <<<"${PM_INSTALL_MAP[$PM]} "
        unset 'INSTALL_OPTION[-1]'
        readarray -td ' ' UPGRADE_OPTION <<<"${PM_UPGRADE_MAP[$PM]} "
        unset 'UPGRADE_OPTION[-1]'
    fi
}

check_package_manager
require_su
if [ -z "$PM" ]; then
    echo "Unable to determine package manager: Unsupported distros"
    abort
elif [[ "$PM" =~ pacman|emerge ]]; then
    [ "$PM" = "emerge" ] && (sudo emerge -qoO aria2[adns] || abort)
    i=30
    while ((i-- > 1)) &&
        ! read -r -sn 1 -t 1 -p $'\r:: Proceed with full system upgrade? Cancel after '$i$'s.. [y/N]\e[0K ' answer; do
        :
    done
    [[ $answer == [yY] ]] && answer=Yes || answer=No
    echo "$answer"
    case "$answer" in
    Yes)
        if ! (sudo "$PM" "${UPDATE_OPTION[@]}" ca-certificates); then abort; fi
        ;;
    *)
        abort "Operation cancelled by user"
        ;;
    esac
else
    if ! (sudo "$PM" "${UPDATE_OPTION[@]}" && sudo "$PM" "${UPGRADE_OPTION[@]}" ca-certificates); then abort; fi
fi

if [ -n "${NEED_INSTALL[*]}" ]; then
    if [ "$PM" = "zypper" ]; then
        NEED_INSTALL_FIX=${NEED_INSTALL[*]}
        {
            NEED_INSTALL_FIX=${NEED_INSTALL_FIX//whiptail/dialog} 2>&1
        } >>/dev/null

        readarray -td ' ' NEED_INSTALL <<<"$NEED_INSTALL_FIX "
        unset 'NEED_INSTALL[-1]'
    elif [ "$PM" = "apk" ]; then
        NEED_INSTALL_FIX=${NEED_INSTALL[*]}
        readarray -td ' ' NEED_INSTALL <<<"${NEED_INSTALL_FIX//p7zip-full/p7zip} "
        unset 'NEED_INSTALL[-1]'
    elif [ "$PM" = "pacman" ]; then
        NEED_INSTALL_FIX=${NEED_INSTALL[*]}
        {
            NEED_INSTALL_FIX=${NEED_INSTALL_FIX//whiptail/libnewt} 2>&1
            NEED_INSTALL_FIX=${NEED_INSTALL_FIX//python3-pip/python-pip} 2>&1
            NEED_INSTALL_FIX=${NEED_INSTALL_FIX//p7zip-full/p7zip} 2>&1
        } >>/dev/null

        readarray -td ' ' NEED_INSTALL <<<"$NEED_INSTALL_FIX "
        unset 'NEED_INSTALL[-1]'
    elif [ "$PM" = "emerge" ]; then
        NEED_INSTALL_FIX=${NEED_INSTALL[*]}
        {
            NEED_INSTALL_FIX=${NEED_INSTALL_FIX//whiptail/dialog} 2>&1
            NEED_INSTALL_FIX=${NEED_INSTALL_FIX//python3-pip/dev-python/pip} 2>&1
            NEED_INSTALL_FIX=${NEED_INSTALL_FIX//p7zip-full/p7zip} 2>&1
        } >>/dev/null

        readarray -td ' ' NEED_INSTALL <<<"$NEED_INSTALL_FIX "
        unset 'NEED_INSTALL[-1]'
    fi
    if ! (sudo "$PM" "${INSTALL_OPTION[@]}" "${NEED_INSTALL[@]}"); then abort; fi

fi

python_version=$(python3 -c 'import sys;print("{0}{1}".format(*(sys.version_info[:2])))')
PYTHON_VENV_DIR="$(dirname "$PWD")/python3-env"
if [ "$python_version" -ge 311 ] || [ -f "$PYTHON_VENV_DIR/bin/activate" ]; then
    python3 -c "import venv" >/dev/null 2>&1 || {
        case "$PM" in
        zypper)
            if ! (sudo "$PM" "${INSTALL_OPTION[@]}" "python3-venvctrl"); then
                abort
            fi
            ;;
        *)
            if ! (sudo "$PM" "${INSTALL_OPTION[@]}" "python3-venv"); then
                abort
            fi
            ;;
        esac
    }
    echo "Creating python3 virtual env"
    python3 -m venv --system-site-packages "$PYTHON_VENV_DIR" || {
        echo "Failed to upgrade python3 virtual env, clear and recreate"
        python3 -m venv --clear --system-site-packages "$PYTHON_VENV_DIR" || abort "Failed to create python3 virtual env"
    }
fi
if [ -f "$PYTHON_VENV_DIR/bin/activate" ]; then
    # shellcheck disable=SC1091
    source "$PYTHON_VENV_DIR"/bin/activate || abort "Failed to activate python3 virtual env"
    python3 -c "import pkg_resources; pkg_resources.require(open('requirements.txt',mode='r'))" &>/dev/null || {
        echo "Installing Python3 dependencies"
        python3 -m pip install -r requirements.txt || abort "Failed to install python3 dependencies"
    }
    deactivate
else
    python3 -m pip install -r requirements.txt -q || abort "Failed to install python3 dependencies"
fi