import os
import re
from datetime import datetime

from flask import render_template, request
from common.logger import system_logger


# =========================
# 路径
# =========================
BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))

UPLOAD_FOLDER = os.path.join(BASE_DIR, "uploads")
OUTPUT_FOLDER = os.path.join(BASE_DIR, "output")

os.makedirs(UPLOAD_FOLDER, exist_ok=True)
os.makedirs(OUTPUT_FOLDER, exist_ok=True)


# =========================
# 工具：时间
# =========================
def now_str():
    return datetime.now().strftime("%Y-%m-%d %H:%M:%S")


# =========================
# 校验工号
# =========================
def validate_emp_id(emp_id: str):
    if not emp_id:
        return False, "工作证号不能为空"

    if not re.fullmatch(r"\d{8}", emp_id):
        return False, "工作证号必须为8位数字（如 00313390）"

    return True, None


# =========================
# SQL：授权模式（原逻辑）
# =========================
def build_auth_sql(center_name: str, emp_id: str):

    like_center = f"%{center_name}%"
    ts = now_str()

    return f"""-- =========================================
-- 每周动态人员授权 SQL（标准版）
-- 生成时间: {ts}
-- 中心: {center_name}
-- 工号: {emp_id}
-- =========================================

-- =========================
-- Step 1: 获取部门ID
-- =========================
select f_id as department_id
from wd_department
where f_name like '{like_center}';

-- =========================
-- Step 2: 查询部门下已有人员配置
-- =========================
select *
from wd_user
where f_department = (
    select f_id
    from wd_department
    where f_name like '{like_center}'
);

-- =========================
-- Step 3: 查询人员基础信息
-- =========================
select
    f_user_id,
    f_user_name,
    t.f_phone
from t_wxdept_users t
where f_user_id = '{emp_id}';

-- =========================
-- Step 4: 获取新增主键
-- =========================
select max(f_id) + 1 as f_id
from wd_user;

-- =========================
-- Step 5: 新增用户（授权核心）
-- =========================
insert into wd_user values(
    '主键',
    '人员姓名',
    '{emp_id}',
    (
        select f_id
        from wd_department
        where f_name like '{like_center}'
    ),
    0,
    '手机号',
    now()
);
commit;

-- =========================
-- Step 6: 更新用户信息（兜底同步）
-- =========================
update wd_user
set
    f_name = '人员姓名',
    f_uid = '{emp_id}',
    f_desc = '{emp_id}'
where f_id = 10182;
commit;
"""


# =========================
# SQL：重复动态处理（新增核心）
# =========================
def build_rebuild_sql(center_name: str):

    like_center = f"%{center_name}%"
    ts = now_str()

    return f"""-- =========================================
-- 重复动态处理 SQL
-- 生成时间: {ts}
-- 中心: {center_name}
-- =========================================

-- 1. 获取部门ID
select * from wd_department where f_name like '{like_center}';

-- 2. 获取最新关联动态ID
select * from wd_department where f_name like '{like_center}';

-- 3. 查最新通知记录（按时间）
select *
from wd_document
where f_department_id = (
    select f_id from wd_department where f_name like '{like_center}'
)
order by f_create_date desc;

-- 4. 查重复通知ID（示例）
select *
from wd_document
where f_department_id = (
    select f_id from wd_department where f_name like '{like_center}'
)
and f_id in (44992, 44991)
order by f_create_date desc;

-- 5. 查附件
select *
from wd_attachment
where f_document in (44992, 44991);

-- 6. 删除重复通知（保留最新）
delete from wd_document
where f_department_id = (
    select f_id from wd_department where f_name like '{like_center}'
)
and f_id in (44991);

delete from wd_attachment
where f_document in (44991);

-- 7. 重新确认
select * from wd_document
where f_department_id = (
    select f_id from wd_department where f_name like '{like_center}'
);

select * from wd_attachment
where f_document in (44991);
"""


# =========================
# 页面入口
# =========================
def weekly_permission_page():

    sql_text = None
    message = None

    center_name = ""
    emp_id = ""

    try:
        if request.method == "POST":

            center_name = (request.form.get("center_name") or "").strip()
            emp_id = (request.form.get("emp_id") or "").strip()
            action = (request.form.get("action") or "auth").strip()

            # ===== 校验 =====
            if not center_name:
                raise Exception("中心名称不能为空")

            ok, err = validate_emp_id(emp_id)
            if not ok:
                raise Exception(err)

            # ===== 分流核心 =====
            if action == "auth":
                sql_text = build_auth_sql(center_name, emp_id)
                message = "授权SQL生成成功"

            elif action == "rebuild":
                sql_text = build_rebuild_sql(center_name)
                message = "重复动态处理SQL生成成功"

            else:
                raise Exception("未知操作类型")

            system_logger.info(
                f"[WeeklySQL] action={action}, center={center_name}, emp_id={emp_id}"
            )

    except Exception as e:
        message = f"错误：{str(e)}"
        system_logger.exception("[WeeklyPermission ERROR]")

    return render_template(
        "weekly_permission.html",
        sql_text=sql_text,
        message=message,
        center_name=center_name,
        emp_id=emp_id
    )