#!/bin/sh

# 公共变量
VERSION_FILE="/app/version.txt"
MIXAPI_BIN="/app/mixapi"
MIXAPI_NEW="/app/mixapi.new"
UPDATE_SCRIPT="/app/check_update.sh"
CRON_FILE="/var/spool/cron/crontabs/root"
DEFAULT_VERSION="v1.2"

# 国内使用 GitHub 代理加速
# 支持通过环境变量 GITHUB_PROXY 覆盖默认代理
# 备用代理列表（按优先级排序）
GITHUB_PROXY_LIST="${GITHUB_PROXY:-https://mirror.ghproxy.com https://gh.ddlc.top https://ghfast.top https://github.moeyy.xyz}"

# 测试代理是否可用
test_proxy() {
    local proxy=$1
    local test_url="${proxy}/https://api.github.com/repos/aiprodcoder/MIXAPI/releases/latest"
    wget -qO- --timeout=10 "$test_url" >/dev/null 2>&1
    return $?
}

# 获取可用的代理
get_working_proxy() {
    for proxy in $GITHUB_PROXY_LIST; do
        echo "测试代理: $proxy" >&2
        if test_proxy "$proxy"; then
            echo "代理可用: $proxy" >&2
            echo "$proxy"
            return 0
        fi
        echo "代理不可用: $proxy" >&2
    done
    echo ""
    return 1
}

# 获取最新版本号（带重试机制）
get_latest_version() {
    local proxy
    for proxy in $GITHUB_PROXY_LIST; do
        local api_url="${proxy}/https://api.github.com/repos/aiprodcoder/MIXAPI/releases/latest"
        local version=$(wget -qO- --timeout=15 "$api_url" 2>/dev/null | sed -n 's/.*"tag_name":[[:space:]]*"\([^"]*\)".*/\1/p')
        if [ -n "$version" ]; then
            # 保存可用的代理供后续使用
            WORKING_PROXY="$proxy"
            echo "$version"
            return 0
        fi
    done
    echo ""
    return 1
}

# 获取架构对应的文件名后缀
get_arch_suffix() {
    local arch="$(uname -m)"
    
    case "$arch" in
        'x86_64')
            echo "linux-amd64"
            ;;
        'aarch64')
            echo "linux-arm64"
            ;;
        *)
            echo ""
            ;;
    esac
}

# 下载指定版本（带多代理重试机制）
# 参数: $1=版本号, $2=目标文件路径
download_version() {
    local version=$1
    local target=$2
    local arch_suffix=$(get_arch_suffix)
    
    if [ -z "$arch_suffix" ]; then
        echo "不支持的架构: $(uname -m)"
        return 1
    fi
    
    local filename="mixapi-${version}-${arch_suffix}"
    local github_path="https://github.com/aiprodcoder/MIXAPI/releases/download/${version}/${filename}"
    
    # 如果之前已经找到可用代理，优先使用
    if [ -n "$WORKING_PROXY" ]; then
        local url="${WORKING_PROXY}/${github_path}"
        echo "下载地址: ${url}"
        wget -qO "$target" --timeout=60 "$url" 2>/dev/null
        if [ $? -eq 0 ] && [ -s "$target" ]; then
            chmod +x "$target"
            return 0
        fi
    fi
    
    # 遍历所有代理尝试下载
    for proxy in $GITHUB_PROXY_LIST; do
        local url="${proxy}/${github_path}"
        echo "尝试下载: ${url}"
        wget -qO "$target" --timeout=60 "$url" 2>/dev/null
        
        if [ $? -eq 0 ] && [ -s "$target" ]; then
            chmod +x "$target"
            WORKING_PROXY="$proxy"
            echo "下载成功 (代理: $proxy)"
            return 0
        fi
        echo "下载失败，尝试下一个代理..."
        rm -f "$target"
    done
    
    echo "所有代理均下载失败"
    return 1
}

# 获取当前版本
get_current_version() {
    if [ -f "$VERSION_FILE" ]; then
        cat "$VERSION_FILE"
    else
        echo ""
    fi
}

# 保存版本号
save_version() {
    echo "$1" > "$VERSION_FILE"
}

# 查找 mixapi 进程 PID
find_mixapi_pid() {
    local pid=""
    pid=$(ps aux 2>/dev/null | grep "$MIXAPI_BIN" | grep -v grep | awk '{print $1}' | head -1)
    if [ -z "$pid" ]; then
        # busybox ps 格式不同，尝试另一种方式
        pid=$(ps | grep "$MIXAPI_BIN" | grep -v grep | awk '{print $1}' | head -1)
    fi
    echo "$pid"
}