#!/bin/bash

# ==========================================
# 标题：咸v咆哮制作 - X-UI 终极全能版 (V5.6 智能极速版)
# 更新：1. 新增源自动测速选择 (Ping检测)
#       2. 新增 Aria2 + Axel 双核多线程下载引擎
# 基底：V5.5 (全兼容架构)
# ==========================================

# --- 颜色配置 ---
Red="\033[31m"
Green="\033[32m"
Yellow="\033[33m"
Blue="\033[36m"
Font="\033[0m"

# --- 核心配置 ---
BASE_URL="https://freeyx.vps3344.dpdns.org/xui"
DB_URL_1="https://g1.vps7k7k.xyz/xui/x-ui%E6%A0%87%E5%87%86.db"
DB_URL_2="https://pub-b69a7194f4ea42fba6aa990c49bded91.r2.dev/xui/x-ui%E6%A0%87%E5%87%86.db"

INSTALL_PATH="/usr/local/x-ui"
BIN_LINK="/usr/bin/x-ui"
DB_PATH="/etc/x-ui/x-ui.db"
SET_USER="3344"
SET_PASS="3344"
SET_PORT="8443"

# ==========================================
# 1. 模式选择
# ==========================================
clear
echo -e "${Blue}#################################################${Font}"
echo -e "${Blue}#     X-UI 自动安装脚本 (V5.6 智能极速版)       #${Font}"
echo -e "${Blue}#################################################${Font}"

echo -e "${Yellow}请选择安装模式：${Font}"
echo -e "-------------------------------------------------"
echo -e "1. ${Green}标准安装${Font} (全新安装，默认空配置)"
echo -e "2. ${Green}恢复安装${Font} (安装并自动下载恢复预设的节点配置)"
echo -e "-------------------------------------------------"
read -p "请输入数字 [1-2] (默认1): " INSTALL_MODE
[[ -z "$INSTALL_MODE" ]] && INSTALL_MODE="1"

# ==========================================
# 2. 网络环境智能检测
# ==========================================
check_network() {
    echo -e "${Yellow}>> [0/7] 正在检测网络环境...${Font}"
    HAS_IPV4=0
    HAS_IPV6=0
    
    if curl -s4m2 https://www.google.com/generate_204 >/dev/null 2>&1 || curl -s4m2 https://www.baidu.com >/dev/null 2>&1; then
        HAS_IPV4=1
    fi
    if curl -s6m2 https://www.google.com/generate_204 >/dev/null 2>&1; then
        HAS_IPV6=1
    fi

    if [[ $HAS_IPV4 -eq 1 ]]; then
        echo -e "${Green}检测到 IPv4 网络，将优先使用 IPv4 通道${Font}"
        NET_OPT="-4"
    elif [[ $HAS_IPV6 -eq 1 ]]; then
        echo -e "${Green}检测到纯 IPv6 网络，将自动切换至 IPv6 通道${Font}"
        NET_OPT="-6"
    else
        echo -e "${Red}错误：未检测到任何可用网络！${Font}"
        exit 1
    fi
}
check_network

# ==========================================
# 3. 智能源选择 (自动测速版)
# ==========================================
auto_select_source() {
    echo -e "${Yellow}>> [1/7] 正在智能测速选择最佳软件源...${Font}"
    
    # 定义测试目标
    ALIYUN_URL="https://mirrors.aliyun.com"
    GOOGLE_URL="https://www.google.com"
    
    # 测速逻辑：获取 HTTP 状态码的时间 (超时设为 2秒)
    # 1. 测国外 (Google)
    echo -n "   测试国际连通性... "
    SPEED_GLOBAL=$(curl -o /dev/null -s -w '%{time_total}' --connect-timeout 2 "$GOOGLE_URL")
    if [ $? -ne 0 ]; then SPEED_GLOBAL=999; echo "超时/无法连接"; else echo "${SPEED_GLOBAL}秒"; fi
    
    # 2. 测国内 (Aliyun)
    echo -n "   测试国内连通性... "
    SPEED_CN=$(curl -o /dev/null -s -w '%{time_total}' --connect-timeout 2 "$ALIYUN_URL")
    if [ $? -ne 0 ]; then SPEED_CN=999; echo "超时/无法连接"; else echo "${SPEED_CN}秒"; fi

    # 3. 决策
    # 逻辑：如果 Google 连不上(999) 或者 阿里云速度明显快于 Google，则选国内源
    if (( $(echo "$SPEED_GLOBAL == 999" | bc -l) )); then
        echo -e "${Green}>> 判定为中国大陆环境 (无法连接Google)，自动选择阿里云源${Font}"
        SOURCE_CHOICE="1"
    elif (( $(echo "$SPEED_CN < $SPEED_GLOBAL" | bc -l) )); then
        echo -e "${Green}>> 阿里云响应更快 (CN:$SPEED_CN vs Global:$SPEED_GLOBAL)，自动选择阿里云源${Font}"
        SOURCE_CHOICE="1"
    else
        echo -e "${Green}>> 国际网络良好 (Global:$SPEED_GLOBAL)，自动选择 Cloudflare/官方源${Font}"
        SOURCE_CHOICE="2"
    fi
}

# 执行自动选择
if command -v bc >/dev/null 2>&1 && command -v curl >/dev/null 2>&1; then
    auto_select_source
else
    # 如果没有 bc 工具，默认给个提示让用户盲选，或者默认选2
    echo -e "${Yellow}缺失测速工具，默认选择官方源...${Font}"
    SOURCE_CHOICE="2"
fi

# 执行换源操作
PM="apt"
if [[ -f /etc/redhat-release ]] || command -v yum >/dev/null 2>&1; then PM="yum"; fi

if [ "$SOURCE_CHOICE" != "3" ]; then
    echo -e "${Yellow}>> 正在优化系统软件源...${Font}"
    if [ "$PM" == "apt" ]; then
        if [ -f /etc/os-release ]; then . /etc/os-release; CODENAME=$VERSION_CODENAME; else CODENAME="bookworm"; fi
        cp /etc/apt/sources.list /etc/apt/sources.list.bak.$(date +%s)
        if [ "$SOURCE_CHOICE" == "1" ]; then
             DOMAIN="mirrors.aliyun.com"
        else
             DOMAIN="debian.cloudflare.mirrors.com"
        fi
        cat > /etc/apt/sources.list <<EOF
deb https://$DOMAIN/debian/ $CODENAME main non-free non-free-firmware contrib
deb-src https://$DOMAIN/debian/ $CODENAME main non-free non-free-firmware contrib
deb https://$DOMAIN/debian-security/ $CODENAME-security main
deb https://$DOMAIN/debian/ $CODENAME-updates main non-free non-free-firmware contrib
EOF
    elif [ "$PM" == "yum" ]; then
        mkdir -p /etc/yum.repos.d/bak
        mv /etc/yum.repos.d/*.repo /etc/yum.repos.d/bak/ 2>/dev/null
        if [ "$SOURCE_CHOICE" == "1" ]; then
             curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.aliyun.com/repo/Centos-7.repo
        else
             curl -o /etc/yum.repos.d/CentOS-Base.repo https://mirrors.edge.kernel.org/centos/7/os/x86_64/
        fi
        timeout 60 yum makecache >/dev/null 2>&1
    fi
fi

# ==========================================
# 4. 系统环境处理 (双核下载引擎安装)
# ==========================================
echo -e "${Yellow}>> [2/7] 安装依赖与下载引擎...${Font}"

install_soft() {
    if [ "$PM" == "apt" ]; then
        apt-get install -y $1 >/dev/null 2>&1
    elif [ "$PM" == "yum" ]; then
        yum install -y $1 >/dev/null 2>&1
    fi
}

if [ "$PM" == "apt" ]; then
    pgrep -x "apt" && killall apt apt-get dpkg >/dev/null 2>&1
    rm -rf /var/lib/apt/lists/lock /var/lib/dpkg/lock*
    dpkg --configure -a >/dev/null 2>&1
    
    apt-get update -o Acquire::http::Timeout="20" || echo -e "${Red}源更新超时，尝试继续...${Font}"
    
    # 核心工具
    apt-get install -y curl wget tar ca-certificates bc
    
    # 容错安装功能工具
    install_soft sqlite3
    
    # [新增] 双核下载引擎
    echo -n "   安装 Axel 加速器... "
    install_soft axel && echo "完成" || echo "失败(跳过)"
    
    echo -n "   安装 Aria2 加速器... "
    install_soft aria2 && echo "完成" || echo "失败(跳过)"

    # 时间同步
    if ! apt-get install -y ntpdate >/dev/null 2>&1; then
        apt-get install -y ntpsec-ntpdate >/dev/null 2>&1
    fi
else
    # CentOS
    yum install -y epel-release >/dev/null 2>&1
    yum install -y curl wget tar bc >/dev/null 2>&1
    install_soft sqlite3
    install_soft ntpdate
    install_soft axel
    install_soft aria2
fi

# ==========================================
# 5. 时间与架构
# ==========================================
echo -e "${Yellow}>> [3/7] 校准时间...${Font}"
rm -f /etc/localtime
ln -sf /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
if command -v ntpdate >/dev/null 2>&1; then
    ntpdate pool.ntp.org >/dev/null 2>&1
else
    date -s "$(curl -sI g.cn | grep Date | cut -d' ' -f3-6)Z" >/dev/null 2>&1
fi

echo -e "${Yellow}>> [4/7] 识别架构...${Font}"
ARCH=$(uname -m)
FILE_NAME=""
case $ARCH in
    x86_64) FILE_NAME="x-ui-linux-amd64.tar.gz" ;;
    aarch64) FILE_NAME="x-ui-linux-arm64.tar.gz" ;;
    i386|i686) FILE_NAME="x-ui-linux-386.tar.gz" ;;
    armv5*) FILE_NAME="x-ui-linux-armv5.tar.gz" ;;
    *) echo -e "${Red}不支持的架构: $ARCH${Font}"; exit 1 ;;
esac

# ==========================================
# 6. 智能下载管理器 (双核+自动回退)
# ==========================================
# 参数: $1=URL, $2=OutputFilename
download_manager() {
    local url=$1
    local file=$2
    rm -f "$file"
    
    # 优先级 1: Axel (轻量多线程)
    if command -v axel >/dev/null 2>&1; then
        echo -e "${Green}>> 启用 Axel 引擎 (16线程)...${Font}"
        if axel -n 16 -k -q -o "$file" "$url"; then return 0; fi
        echo -e "${Red}Axel 下载失败，切换备用引擎...${Font}"
    fi
    
    # 优先级 2: Aria2 (强力多线程)
    if command -v aria2c >/dev/null 2>&1; then
        echo -e "${Green}>> 启用 Aria2 引擎 (16线程)...${Font}"
        # -x16:16连接, -s16:16服务器, -k1M:分块
        if aria2c -x 16 -s 16 -k 1M -o "$file" "$url" >/dev/null 2>&1; then return 0; fi
        echo -e "${Red}Aria2 下载失败，切换单线程...${Font}"
    fi
    
    # 优先级 3: Wget (稳定单线程)
    echo -e "${Yellow}>> 启用 Wget (单线程)...${Font}"
    if wget $NET_OPT --no-check-certificate --timeout=30 --tries=3 -O "$file" "$url"; then return 0; fi
    
    # 优先级 4: Curl (最后保底)
    echo -e "${Yellow}>> 启用 Curl (最后保底)...${Font}"
    curl $NET_OPT -L -k --connect-timeout 30 --retry 3 -o "$file" "$url"
}

echo -e "${Yellow}>> [5/7] 下载安装包 (Mode: $NET_OPT)...${Font}"
cd /usr/local/
DOWNLOAD_URL="${BASE_URL}/${FILE_NAME}"

# 调用下载管理器
download_manager "$DOWNLOAD_URL" "$FILE_NAME"

if ! tar -tzf "$FILE_NAME" >/dev/null 2>&1; then
    echo -e "${Red}严重错误：安装包下载失败或文件损坏！${Font}"
    exit 1
fi

# ==========================================
# 7. 安装与配置
# ==========================================
echo -e "${Yellow}>> [6/7] 安装与配置...${Font}"
systemctl stop x-ui >/dev/null 2>&1
killall x-ui >/dev/null 2>&1
rm -rf x-ui
tar zxvf "$FILE_NAME" >/dev/null
cd x-ui
chmod +x x-ui x-ui.sh bin/xray-linux-*
ln -sf "$INSTALL_PATH/x-ui.sh" "$BIN_LINK"
mkdir -p /etc/x-ui/

if [ "$INSTALL_MODE" == "2" ]; then
    echo -e "${Yellow}>> 正在执行恢复模式，下载配置文件...${Font}"
    rm -f "$DB_PATH"
    
    # 尝试下载主备份 (使用智能下载器)
    download_manager "$DB_URL_1" "$DB_PATH"
    
    # 检查是否成功，失败则尝试备用
    if [ ! -s "$DB_PATH" ] || [ $(stat -c%s "$DB_PATH") -lt 1000 ]; then
        echo -e "${Red}主链接失败，尝试备用链接...${Font}"
        download_manager "$DB_URL_2" "$DB_PATH"
    fi
    
    if [ -s "$DB_PATH" ]; then
        echo -e "${Green}配置文件恢复成功！${Font}"
    else
        echo -e "${Red}配置文件下载失败，将降级为标准安装...${Font}"
        cp /usr/local/x-ui/bin/x-ui.db "$DB_PATH"
    fi
else
    echo -e "${Yellow}>> 执行标准安装...${Font}"
    ./x-ui setting -port $SET_PORT -username $SET_USER -password $SET_PASS >/dev/null 2>&1
    [ ! -f "$DB_PATH" ] && cp /usr/local/x-ui/bin/x-ui.db "$DB_PATH"
fi

# --- 统一强制重置账号 ---
echo -e "${Yellow}>> 正在强制重置账户权限...${Font}"
systemctl stop x-ui >/dev/null 2>&1
killall x-ui >/dev/null 2>&1
chmod 777 "$DB_PATH" >/dev/null 2>&1

RESET_SUCCESS=0
if command -v sqlite3 >/dev/null 2>&1; then
    sqlite3 -cmd ".timeout 2000" "$DB_PATH" "UPDATE settings SET value='/' WHERE key='webBasePath';"
    sqlite3 -cmd ".timeout 2000" "$DB_PATH" "UPDATE settings SET value='$SET_PORT' WHERE key='webPort';"
    sqlite3 -cmd ".timeout 2000" "$DB_PATH" "UPDATE users SET username='$SET_USER', password='$SET_PASS' WHERE id=1;"
    CURRENT_PASS=$(sqlite3 "$DB_PATH" "SELECT password FROM users WHERE id=1;")
    if [ "$CURRENT_PASS" == "$SET_PASS" ]; then
        echo -e "${Green}账户权限重置成功 (SQL模式)${Font}"
        RESET_SUCCESS=1
    fi
fi

if [ $RESET_SUCCESS -eq 0 ]; then
    echo -e "${Yellow}使用官方接口重置账号...${Font}"
    ./x-ui setting -username "$SET_USER" -password "$SET_PASS" -port "$SET_PORT" >/dev/null 2>&1
fi
chmod 644 "$DB_PATH" >/dev/null 2>&1

# ==========================================
# 8. 启动与放行
# ==========================================
echo -e "${Yellow}>> [7/7] 启动服务...${Font}"
cat > /etc/systemd/system/x-ui.service <<EOF
[Unit]
Description=x-ui Service
After=network.target

[Service]
Type=simple
User=root
WorkingDirectory=$INSTALL_PATH
ExecStart=$INSTALL_PATH/x-ui
Restart=on-failure
RestartSec=5s

[Install]
WantedBy=multi-user.target
EOF

systemctl daemon-reload
systemctl enable x-ui
systemctl restart x-ui
sleep 2

if command -v ufw >/dev/null 2>&1; then ufw allow $SET_PORT/tcp >/dev/null 2>&1; fi
if command -v firewall-cmd >/dev/null 2>&1; then 
    firewall-cmd --zone=public --add-port=$SET_PORT/tcp --permanent >/dev/null 2>&1
    firewall-cmd --reload >/dev/null 2>&1
fi
iptables -I INPUT -p tcp --dport $SET_PORT -j ACCEPT 2>/dev/null

IP=$(curl -s4m5 ip.sb)
[ -z "$IP" ] && IP=$(curl -s6m5 ip.sb)

echo -e "\n${Blue}#################################################${Font}"
echo -e "${Green}      咸v咆哮制作 - 安装完成 (V5.6 智能极速版)   ${Font}"
echo -e "${Blue}#################################################${Font}"
echo -e "访问地址 ：${Green}http://$IP:$SET_PORT${Font}"
echo -e "用户名   ：${Green}$SET_USER${Font}"
echo -e "密码     ：${Green}$SET_PASS${Font}"
if [ "$INSTALL_MODE" == "2" ]; then
    echo -e "提示     ：${Yellow}已成功恢复节点配置，账号密码已重置为 3344${Font}"
fi
echo -e "${Blue}#################################################${Font}"