#!/bin/bash

test::os_unsupport() {
    local src_os_type=$1
    local tar_os_type=$2

    declare -A os_map=(
        ["CentOS7"]="AnolisOS7 AnolisOS8 AliLinux2 AliLinux3 AliLinux3Pro"
        ["CentOS8"]="AnolisOS8 AliLinux3 AliLinux3Pro"
        ["AliLinux2"]="AliLinux3"
        ["AliLinux3"]="AliLinux3Pro"
        ["RedHat7"]="AliLinux3"
        ["RedHat8"]="AliLinux3"
    )
    
    # get current os type
    os_name=$(cat /etc/os-release | grep "^NAME=" | cut -d "=" -f2 | awk -F\" '{print $2}')
    os_version=$(cat /etc/os-release | grep "^VERSION_ID=" | cut -d "=" -f2 | tr -d '\"')
    cur_os_type="unsupport system"
    if [[ "$os_name" == "CentOS Linux"* ]]; then
        if [[ "$os_version" == "7"* ]]; then
            cur_os_type="CentOS7"
        elif [[ "$os_version" == "8"* ]]; then
            cur_os_type="CentOS8"
        fi
    elif [[ "$os_name" == "Alibaba Cloud Linux"* ]]; then
        if [[ "$os_version" == "2"* ]]; then
            cur_os_type="AliLinux2"
        elif [[ "$os_version" == "3"* ]]; then
            cur_os_type="AliLinux3"
        fi
	elif [[ "$os_name" == "Red Hat Enterprise Linux"* ]]; then
        if [[ "$os_version" == "7.9"* ]]; then
            cur_os_type="RedHat7"
        elif [[ "$os_version" == "8"* ]]; then
            cur_os_type="RedHat8"
        fi
    else
        echo "The OS Name '$os_name' With OS Version '$os_version' Is Not Support"
        exit 111
    fi


    if [[ "$src_os_type" != "$cur_os_type" ]]; then
        echo "Current OS Type Is '$cur_os_type', Not '$src_os_type'"
        exit 111
    fi

    if [[ "${os_map[$src_os_type]}"* =~ "$tar_os_type" ]]; then
        exit 0
    else
        echo "'$src_os_type' to '$tar_os_type' Is Not Support"
        exit 111
    fi
    
    exit 0
}

test::os_unsupport $1 $2