#!/bin/bash
# ============================================================
# Pre-push Hook — HIS 项目防误删保护
# 功能: 推送前检查是否删除了关键文件或大量文件
# 安装: git config core.hooksPath .githooks
# ============================================================

REMOTE="$1"
URL="$2"
ZERO="0000000000000000000000000000000000000000"

# 受保护路径列表 (严禁删除)
PROTECTED_PATHS=(
    "openhis-server-new/pom.xml"
    "openhis-server-new/core-admin"
    "openhis-server-new/core-framework"
    "openhis-server-new/core-system"
    "openhis-server-new/core-common"
    "openhis-server-new/core-flowable"
    "openhis-server-new/core-quartz"
    "openhis-server-new/core-generator"
    "openhis-server-new/openhis-application"
    "openhis-server-new/openhis-domain"
    "openhis-server-new/openhis-common"
)

MAX_DELETE_FILES=100

echo "==========================================="
echo " Pre-push: 推送安全检查"
echo "==========================================="

while read local_ref local_sha remote_ref remote_sha; do
    # 跳过删除分支操作
    [ "$local_sha" = "$ZERO" ] && continue

    # 新分支没有 remote_sha，用 origin/develop 做基准
    if [ "$remote_sha" = "$ZERO" ]; then
        remote_sha=$(git rev-parse origin/develop 2>/dev/null || echo "")
        [ -z "$remote_sha" ] && continue
    fi

    # ==== 检查 1: 是否删除了受保护路径 ====
    for path in "${PROTECTED_PATHS[@]}"; do
        if git diff --name-status "$remote_sha".."$local_sha" 2>/dev/null | grep -q "^D.*$path"; then
            echo "错误: 受保护路径被删除!"
            echo "   路径: $path"
            echo "   本次推送已拦截。如确有需要，请联系仓库管理员。"
            exit 1
        fi
    done

    # ==== 检查 2: 是否删除了过多文件 ====
    delete_count=$(git diff --name-status "$remote_sha".."$local_sha" 2>/dev/null | grep -c "^D")
    if [ "$delete_count" -gt "$MAX_DELETE_FILES" ]; then
        echo "错误: 本次推送删除了 $delete_count 个文件 (阈值: $MAX_DELETE_FILES)"
        echo "   请检查是否有误删操作。确认需要推送请执行:"
        echo "   git push --no-verify origin $local_ref:$remote_ref"
        exit 1
    fi

    # ==== 检查 3: 是否删除了 pom.xml (任何位置) ====
    deleted_poms=$(git diff --name-status "$remote_sha".."$local_sha" 2>/dev/null | grep "^D.*pom.xml")
    if [ -n "$deleted_poms" ]; then
        echo "错误: pom.xml 文件被删除!"
        echo "$deleted_poms"
        echo "   本次推送已拦截。"
        exit 1
    fi

    # ==== 检查 4: 删除/新增比例异常 ====
    add_count=$(git diff --name-status "$remote_sha".."$local_sha" 2>/dev/null | grep -c "^[AMR]")
    if [ "$delete_count" -gt 0 ] && [ "$add_count" -gt 0 ]; then
        ratio=$((delete_count * 100 / add_count))
        if [ "$ratio" -gt 80 ]; then
            echo "警告: 删除文件比例异常 ($ratio% 是删除)"
            echo "   删除: $delete_count / 新增: $add_count"
            echo "   请人工确认后重新推送。"
            exit 1
        fi
    fi

    echo "Pre-push 检查通过 ($add_count 新增, $delete_count 删除)"
done

exit 0