#!/usr/bin/env bash

DEBUG_LOG_FILE="/var/log/hestia_php_selector.log"
debug_out_function(){
    pattern=">>$DEBUG_LOG_FILE DEBUG"
    res="$@"
    dt="[$(date -Is)]"
    res1=${res#*debug_out_function}
    result="${res1%%$pattern*}"
    echo "$dt + ${result# }"
}
exec 3>&1 1> >(tee -a "$DEBUG_LOG_FILE") 2>&1
trap "debug_out_function $BASH_COMMAND>>$DEBUG_LOG_FILE" DEBUG


function restore_system() {
    current_php=$(readlink -f /usr/bin/php)
    if [ "$current_php" == "/usr/bin/hestiacp-php-selector" ]; then
        if [ -e /etc/hestia_php_selector/system/php.path ]; then
            php_sys=$(cat /etc/hestia_php_selector/system/php.path)
            if [ -n "$php_sys" -o "$php_sys" == "/usr/bin/hestiacp-php-selector" ]; then
                inst_tp="/usr/bin/php82"
                if [ -e /usr/local/hestia/conf/hestia.conf ]; then
                    res=$(cat /usr/local/hestia/conf/hestia.conf | grep "LOCAL_PHP" | grep "yes")
                    if [ -n "$res" ]; then
                        inst_tp="/opt/brepo/php82/bin/php"
                    fi
                fi
                update-alternatives --display php | grep "$inst_tp"
                if [ $? -eq 0 ]; then
                    update-alternatives --set php "$php_sys"
                else
                    php_ver=$(echo "$php_sys" | grep -o -P "php\d+.?\d+")
                    is_sim_php=$(update-alternatives --display php | tail -n +3 | grep -Po "^(.+?)(?= -)" | grep "$php_ver" | head -n1)
                    fst_php=$(update-alternatives --display php | tail -n +3 | grep -Po "^(.+?)(?= -)" | head -n1)
                    if [ -n "$is_sim_php" ]; then
                        update-alternatives --set php "$is_sim_php"
                    else
                        if [ -n "$fst_php" ]; then
                            update-alternatives --set php "$fst_php"
                        fi
                    fi
                fi
            fi
        fi
    fi
}

uid=$(id -u)
if [ "$uid" != "0" ]; then
    echo "Command must be executed as privileged user"
    exit 0
fi
case "$1" in
install)
    echo "Try to find php-selector for hestiacp"
    current_path_to_php=""
    if [ -e /usr/bin/php ]; then
        current_path_to_php=$(readlink -f /usr/bin/php)
    fi
    update-alternatives --display php | grep hestiacp-php-selector
    if [ $? -ne 0 ]; then
        echo "Register php-selector"
        update-alternatives --install /usr/bin/php php /usr/bin/hestiacp-php-selector 1
        if [ ! -e /etc/hestia_php_selector/system/php.path ]; then
            mkdir -p /etc/hestia_php_selector/system/
            echo "$current_path_to_php" >/etc/hestia_php_selector/system/php.path
            chmod 644 /etc/hestia_php_selector/system/php.path
        fi
        /usr/bin/hestiacp-php-admin add
    fi
    ;;
delete)
    restore_system
    update-alternatives --display php | grep hestiacp-php-selector
    if [ $? -eq 0 ]; then
        update-alternatives --remove php /usr/bin/hestiacp-php-selector
    fi
    /usr/bin/hestiacp-php-admin remove-all
    ;;
off)
    restore_system
    ;;
*)
    echo "Unknown command"
    ;;
esac