#!/bin/bash

red='\033[0;31m'
green='\033[0;32m'
blue='\033[0;34m'
yellow='\033[0;33m'
plain='\033[0m'

cur_dir=$(pwd)

xui_folder="${XUI_MAIN_FOLDER:=/usr/local/x-ui}"
xui_service="${XUI_SERVICE:=/etc/systemd/system}"

GITHUB_MIRROR_DEFAULT="https://gh.kejilion.pro"
GITHUB_RAW_DEFAULT="https://raw.githubusercontent.com"

[[ $EUID -ne 0 ]] && echo -e "${red}Fatal error: ${plain} Please run this script with root privilege \n " && exit 1

if [[ -f /etc/os-release ]]; then
    source /etc/os-release
    release=$ID
elif [[ -f /usr/lib/os-release ]]; then
    source /usr/lib/os-release
    release=$ID
else
    echo "Failed to check the system OS, please contact the author!" >&2
    exit 1
fi
echo "The OS release is: $release"

arch() {
    case "$(uname -m)" in
        x86_64 | x64 | amd64) echo 'amd64' ;;
        i*86 | x86) echo '386' ;;
        armv8* | armv8 | arm64 | aarch64) echo 'arm64' ;;
        armv7* | armv7 | arm) echo 'armv7' ;;
        armv6* | armv6) echo 'armv6' ;;
        armv5* | armv5) echo 'armv5' ;;
        s390x) echo 's390x' ;;
        *) echo -e "${green}Unsupported CPU architecture! ${plain}" && rm -f update.sh && exit 1 ;;
    esac
}

echo "Arch: $(arch)"

get_github_mirror() {
    local custom_mirror="${GITHUB_MIRROR:-}"
    if [[ -n "$custom_mirror" ]]; then
        echo "$custom_mirror"
    else
        echo "$GITHUB_MIRROR_DEFAULT"
    fi
}

get_github_raw() {
    local mirror=$(get_github_mirror)
    if [[ "$mirror" == "$GITHUB_MIRROR_DEFAULT" ]]; then
        echo "$GITHUB_RAW_DEFAULT"
    else
        echo "$mirror"
    fi
}

update_x-ui() {
    cd ${xui_folder%/x-ui}/

    local github_raw=$(get_github_raw)

    if [ $# == 0 ]; then
        tag_version=$(curl -4 -Ls "https://api.github.com/repos/mhsanaei/3x-ui/releases/latest" | grep '"tag_name":' | sed -E 's/.*"([^"]+)".*/\1/')
        if [[ ! -n "$tag_version" ]]; then
            echo -e "${yellow}Failed to fetch x-ui version, it may be due to GitHub API restrictions, please try it later${plain}"
            exit 1
        fi
        echo -e "Got x-ui latest version: ${tag_version}, beginning the installation..."
        curl -4fLRo ${xui_folder}-linux-$(arch).tar.gz https://github.com/mhsanaei/3x-ui/releases/download/${tag_version}/x-ui-linux-$(arch).tar.gz
        if [[ $? -ne 0 ]]; then
            echo -e "${red}Downloading x-ui failed, please be sure that your server can access GitHub ${plain}"
            exit 1
        fi
    else
        tag_version=$1
        tag_version_numeric=${tag_version#v}
        min_version="2.3.5"

        if [[ "$(printf '%s\n' "$min_version" "$tag_version_numeric" | sort -V | head -n1)" != "$min_version" ]]; then
            echo -e "${red}Please use a newer version (at least v2.3.5). Exiting installation.${plain}"
            exit 1
        fi

        url="https://github.com/mhsanaei/3x-ui/releases/download/${tag_version}/x-ui-linux-$(arch).tar.gz"
        echo -e "Beginning to install x-ui $1"
        curl -4fLRo ${xui_folder}-linux-$(arch).tar.gz ${url}
        if [[ $? -ne 0 ]]; then
            echo -e "${red}Download x-ui $1 failed, please check if the version exists ${plain}"
            exit 1
        fi
    fi

    curl -4fLRo /usr/bin/x-ui-temp ${github_raw}/mhsanaei/3x-ui/main/x-ui.sh
    if [[ $? -ne 0 ]]; then
        echo -e "${red}Failed to download x-ui.sh${plain}"
        exit 1
    fi

    if [[ -e ${xui_folder}/ ]]; then
        if [[ $release == "alpine" ]]; then
            rc-service x-ui stop
        else
            systemctl stop x-ui
        fi
        rm ${xui_folder}/ -rf
    fi

    tar zxvf x-ui-linux-$(arch).tar.gz
    rm x-ui-linux-$(arch).tar.gz -f

    cd x-ui
    chmod +x x-ui
    chmod +x x-ui.sh

    if [[ $(arch) == "armv5" || $(arch) == "armv6" || $(arch) == "armv7" ]]; then
        mv bin/xray-linux-$(arch) bin/xray-linux-arm
        chmod +x bin/xray-linux-arm
    fi
    chmod +x x-ui bin/xray-linux-$(arch)

    mv -f /usr/bin/x-ui-temp /usr/bin/x-ui
    chmod +x /usr/bin/x-ui

    mkdir -p /var/log/x-ui

    if [[ $release == "alpine" ]]; then
        rc-service x-ui start
    else
        systemctl start x-ui
    fi

    echo -e "${green}x-ui ${tag_version}${plain} update finished, it is running now..."
    echo -e ""
    echo -e "┌───────────────────────────────────────────────────────┐
│  ${blue}x-ui control menu usages (subcommands):${plain}              │
│                                                       │
│  ${blue}x-ui${plain}              - Admin Management Script          │
│  ${blue}x-ui start${plain}        - Start                            │
│  ${blue}x-ui stop${plain}         - Stop                             │
│  ${blue}x-ui restart${plain}      - Restart                          │
│  ${blue}x-ui status${plain}       - Current Status                   │
│  ${blue}x-ui settings${plain}     - Current Settings                 │
│  ${blue}x-ui enable${plain}       - Enable Autostart on OS Startup   │
│  ${blue}x-ui disable${plain}      - Disable Autostart on OS Startup  │
│  ${blue}x-ui log${plain}          - Check logs                       │
│  ${blue}x-ui banlog${plain}       - Check Fail2ban ban logs          │
│  ${blue}x-ui update${plain}       - Update                           │
│  ${blue}x-ui legacy${plain}       - Legacy version                   │
│  ${blue}x-ui install${plain}      - Install                          │
│  ${blue}x-ui uninstall${plain}    - Uninstall                        │
└───────────────────────────────────────────────────────┘"
}

echo -e "${green}Running...${plain}"
update_x-ui $1