import io
import json
import math
import os
import threading
from types import SimpleNamespace
from typing import Optional
from datetime import date, datetime
import asyncio
import httpx
import pandas as pd
from fastapi import APIRouter, Depends, HTTPException, File, Form, UploadFile
from fastapi.responses import Response, StreamingResponse
from pydantic import BaseModel
from sqlalchemy.orm import Session
from sqlalchemy import String, and_, cast, func, or_, text
from urllib.parse import quote

from app.database import SessionLocal, get_db, get_secondary_engine
from app.models import Order
from app.auth import get_current_user
from app.event_logger import log_event
from app.search_utils import (
    can_use_trigram_fts,
    fts_phrase,
    normalize_phone,
    normalize_tracking,
    prefix_upper_bound,
)

router = APIRouter()
CS_RETURN_REQUEST_URL = os.getenv(
    "CS_RETURN_REQUEST_URL",
    "http://dbx-corm:8002/api/return/request",
)
# 서비스 간 호출 인증용 토큰 (양쪽 .env 에 같은 값으로 박는다).
# CORM 의 AuthGuard 가 이 헤더를 보고 세션 검사 우회.
INTERNAL_SERVICE_TOKEN = os.getenv("INTERNAL_SERVICE_TOKEN", "")

# Global dict to hold upload progress. In a real world scenario this should be in Redis or DB.
upload_progress_state = {}

TEMPLATE_COLUMN_ALIASES = {
    "order_date": ["주문날짜"],
    "sequence_num": ["번호"],
    "order_no": ["주문번호"],
    "recipient_name": ["수령인명"],
    "product_code": ["상품코드"],
    "product_name": ["상품명"],
    "order_quantity": ["수량"],
    "address": ["주소"],
    "postal_code": ["우편번호"],
    "recipient_phone": ["수령인전화번호", "수령인전화"],
    "recipient_mobile": ["수령인휴대폰"],
    "delivery_memo": ["배송시요구사항", "배송시요구"],
    "tracking_number": ["송장번호"],
    "vendor": ["쇼핑몰명"],
    "order_note": ["비고"],
    "order_no_mall": ["주문번호(쇼핑몰)"],
    "order_list_1": ["주문목록"],
}

TEMPLATE_COLUMN_FALLBACK_INDEXES = {
    "order_no_mall": 15,  # Excel P column
    "order_list_1": 16,   # Excel Q column
}

REQUIRED_TEMPLATE_FIELDS = [
    "order_date",
    "order_no",
    "recipient_name",
    "product_code",
    "product_name",
    "order_quantity",
    "address",
    "recipient_mobile",
    "tracking_number",
    "vendor",
]


def normalize_template_column(value) -> str:
    return str(value).replace("\n", "").replace(" ", "").strip()


def clean_excel_value(value) -> str | None:
    if value is None or pd.isna(value):
        return None
    if isinstance(value, datetime):
        return value.strftime("%Y-%m-%d %H:%M:%S")
    if isinstance(value, date):
        return datetime.combine(value, datetime.min.time()).strftime("%Y-%m-%d %H:%M:%S")
    text = str(value).strip()
    return text or None


def find_template_columns(raw_columns) -> dict[str, int]:
    normalized_columns = [normalize_template_column(column) for column in raw_columns]
    column_map = {}

    for field, aliases in TEMPLATE_COLUMN_ALIASES.items():
        normalized_aliases = [normalize_template_column(alias) for alias in aliases]
        for alias in normalized_aliases:
            if alias in normalized_columns:
                column_map[field] = normalized_columns.index(alias)
                break

    for field, column_index in TEMPLATE_COLUMN_FALLBACK_INDEXES.items():
        if field not in column_map and column_index < len(normalized_columns):
            column_map[field] = column_index

    missing_required = [
        TEMPLATE_COLUMN_ALIASES[field][0]
        for field in REQUIRED_TEMPLATE_FIELDS
        if field not in column_map
    ]
    if missing_required:
        raise ValueError("템플릿 필수 컬럼이 없습니다: " + ", ".join(missing_required))

    return column_map


def row_value(row_values, column_map: dict[str, int], field: str) -> str | None:
    index = column_map.get(field)
    if index is None or index >= len(row_values):
        return None
    return clean_excel_value(row_values[index])


def normalize_address_key(value) -> str:
    if not value:
        return ""
    return str(value).strip(" \t\r\n\u00a0\u200b\u200c\u200d\ufeff")


def is_manual_vendor(value) -> bool:
    return str(value or "").replace(" ", "") == "수동발주"


def set_upload_state(
    user_id: str,
    *,
    status: str,
    message: str,
    upload_progress: int = 0,
    index_progress: int = 0,
    total_rows: int = 0,
    processed_rows: int = 0,
    indexed_rows: int = 0,
):
    upload_progress_state[user_id] = {
        "status": status,
        "message": message,
        "upload_progress": max(0, min(100, int(upload_progress))),
        "index_progress": max(0, min(100, int(index_progress))),
        "total_rows": int(total_rows or 0),
        "processed_rows": int(processed_rows or 0),
        "indexed_rows": int(indexed_rows or 0),
    }


def set_upload_error(user_id: str, message: str):
    previous = upload_progress_state.get(user_id, {})
    set_upload_state(
        user_id,
        status="error",
        message=message,
        upload_progress=previous.get("upload_progress", 0),
        index_progress=previous.get("index_progress", 0),
        total_rows=previous.get("total_rows", 0),
        processed_rows=previous.get("processed_rows", 0),
        indexed_rows=previous.get("indexed_rows", 0),
    )


def build_order_search_query(
    db: Session,
    *,
    name: Optional[str] = None,
    tracking: Optional[str] = None,
    phone: Optional[str] = None,
    address: Optional[str] = None,
    order_start_date: Optional[str] = None,
    order_end_date: Optional[str] = None,
):
    query = db.query(Order)
    params = {}
    is_sqlite = db.get_bind().dialect.name == "sqlite"

    if name:
        if is_sqlite and can_use_trigram_fts(name):
            params["name_fts"] = f"recipient_name:{fts_phrase(name)}"
            query = query.filter(
                text(
                    "orders.id IN ("
                    "SELECT rowid FROM orders_name_address_fts "
                    "WHERE orders_name_address_fts MATCH :name_fts"
                    ")"
                )
            )
        else:
            query = query.filter(Order.recipient_name.ilike(f"%{name}%"))
    if tracking:
        clean_tracking = normalize_tracking(tracking)
        if clean_tracking:
            tracking_upper = prefix_upper_bound(clean_tracking)
            if tracking_upper:
                query = query.filter(
                    Order.tracking_number_normalized >= clean_tracking,
                    Order.tracking_number_normalized < tracking_upper,
                )
            else:
                query = query.filter(Order.tracking_number_normalized == clean_tracking)
    if phone:
        clean_phone = normalize_phone(phone)
        if clean_phone:
            if is_sqlite and can_use_trigram_fts(clean_phone):
                params["phone_fts"] = (
                    f"recipient_phone_normalized:{fts_phrase(clean_phone)} OR "
                    f"recipient_mobile_normalized:{fts_phrase(clean_phone)}"
                )
                query = query.filter(
                    text(
                        "orders.id IN ("
                        "SELECT rowid FROM orders_phone_fts "
                        "WHERE orders_phone_fts MATCH :phone_fts"
                        ")"
                    )
                )
            else:
                query = query.filter(
                    or_(
                        Order.recipient_phone_normalized.like(f"%{clean_phone}%"),
                        Order.recipient_mobile_normalized.like(f"%{clean_phone}%"),
                    )
                )
    if address:
        if is_sqlite and can_use_trigram_fts(address):
            params["address_fts"] = f"address:{fts_phrase(address)}"
            query = query.filter(
                text(
                    "orders.id IN ("
                    "SELECT rowid FROM orders_name_address_fts "
                    "WHERE orders_name_address_fts MATCH :address_fts"
                    ")"
                )
            )
        else:
            query = query.filter(Order.address.ilike(f"%{address}%"))

    if order_start_date:
        query = query.filter(Order.order_date >= f"{order_start_date} 00:00:00")
    if order_end_date:
        query = query.filter(Order.order_date <= f"{order_end_date} 23:59:59")

    if params:
        query = query.params(**params)

    has_filters = any([name, tracking, phone, address, order_start_date, order_end_date])
    return query, has_filters


def customer_key(name: str | None, phone: str | None):
    normalized_name = (name or "").strip()
    normalized_phone = normalize_phone(phone)
    if not normalized_name or not normalized_phone:
        return None
    return normalized_name, normalized_phone


def order_note_key(order: Order) -> str:
    return (order.order_no_mall or order.order_no or "").strip()


def apply_customer_notes(db: Session, orders: list[Order]):
    keys = {
        key
        for order in orders
        if (key := customer_key(order.recipient_name, order.recipient_mobile or order.recipient_phone))
    }
    if not keys:
        for order in orders:
            order.customer_note = ""
        return

    names = sorted({name for name, _phone in keys})
    phones = sorted({phone for _name, phone in keys})
    note_rows = (
        db.query(
            Order.recipient_name,
            Order.recipient_mobile_normalized,
            Order.recipient_phone_normalized,
            Order.customer_note,
            Order.note,
        )
        .filter(
            or_(
                and_(Order.customer_note.isnot(None), Order.customer_note != ""),
                and_(Order.note.isnot(None), Order.note != ""),
            )
        )
        .filter(func.trim(Order.recipient_name).in_(names))
        .filter(
            or_(
                Order.recipient_mobile_normalized.in_(phones),
                Order.recipient_phone_normalized.in_(phones),
            )
        )
        .order_by(Order.id.desc())
        .all()
    )

    notes_by_customer = {}
    for name, mobile_normalized, phone_normalized, customer_note, legacy_note in note_rows:
        note = customer_note or legacy_note or ""
        for phone_value in (mobile_normalized, phone_normalized):
            key = customer_key(name, phone_value)
            if key in keys and key not in notes_by_customer:
                notes_by_customer[key] = note

    for order in orders:
        key = customer_key(order.recipient_name, order.recipient_mobile or order.recipient_phone)
        order.customer_note = notes_by_customer.get(key, "") if key else ""


def apply_order_notes(db: Session, orders: list[Order]):
    keys = sorted({key for order in orders if (key := order_note_key(order))})
    if not keys:
        for order in orders:
            order.order_note = ""
        return

    note_rows = (
        db.query(
            Order.order_no_mall,
            Order.order_no,
            Order.order_note,
        )
        .filter(Order.order_note.isnot(None), Order.order_note != "")
        .filter(
            or_(
                Order.order_no_mall.in_(keys),
                Order.order_no.in_(keys),
            )
        )
        .order_by(Order.id.desc())
        .all()
    )

    notes_by_order = {}
    for order_no_mall, order_no, note in note_rows:
        for key in ((order_no_mall or "").strip(), (order_no or "").strip()):
            if key in keys and key not in notes_by_order:
                notes_by_order[key] = note or ""

    for order in orders:
        key = order_note_key(order)
        order.order_note = notes_by_order.get(key, "") if key else ""


def order_to_search_item(order: Order):
    return {
        "id": order.id,
        "order_date": order.order_date,
        "sequence_num": order.sequence_num,
        "order_no": order.order_no,
        "order_no_mall": order.order_no_mall,
        "recipient_name": order.recipient_name,
        "product_code": order.product_code,
        "product_name": order.product_name,
        "order_quantity": order.order_quantity,
        "address": order.address,
        "postal_code": order.postal_code,
        "recipient_phone": order.recipient_phone,
        "recipient_mobile": order.recipient_mobile,
        "delivery_memo": order.delivery_memo,
        "tracking_number": order.tracking_number,
        "vendor": order.vendor,
        "order_list_1": order.order_list_1,
        "order_list_2": order.order_list_2,
        "note": order.note,
        "upload_date": order.upload_date,
        "address_order_count": getattr(order, "address_order_count", 0),
        "phone_order_count": getattr(order, "phone_order_count", 0),
        "customer_note": getattr(order, "customer_note", "") or "",
        "order_note": getattr(order, "order_note", "") or "",
    }


def orders_to_excel_response(orders, filename: str, sheet_name: str = "Orders"):
    data = []
    for o in orders:
        data.append({
            "주문날짜": o.order_date,
            "수령인명": o.recipient_name,
            "상품코드": o.product_code,
            "상품명": o.product_name,
            "수량": o.order_quantity,
            "주소": o.address,
            "수령인 전화번호": o.recipient_phone,
            "휴대폰": o.recipient_mobile,
            "송장번호": o.tracking_number,
            "발주처": o.vendor,
            "주문번호": o.order_no,
            "주문번호(쇼핑몰)": o.order_no_mall,
            "주문목록": o.order_list_1,
            "추가날짜": o.upload_date,
        })

    df = pd.DataFrame(data)
    output = io.BytesIO()
    with pd.ExcelWriter(output, engine="openpyxl") as writer:
        df.to_excel(writer, index=False, sheet_name=sheet_name)
    output.seek(0)
    encoded_filename = quote(filename)
    return Response(
        content=output.getvalue(),
        media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
        headers={"Content-Disposition": f"attachment; filename*=UTF-8''{encoded_filename}"},
    )


def run_upload_job(files_data: list[dict], user_id: str, user_data: dict):
    current_user = SimpleNamespace(**user_data)
    db = SessionLocal()
    filenames_str = ", ".join([f["filename"] for f in files_data])

    try:
        db_records = []
        total_rows = 0

        # 1단계: 모든 파일 읽기 및 행 데이터 정규화
        for f_idx, file_item in enumerate(files_data):
            contents = file_item["contents"]
            filename = file_item["filename"]

            set_upload_state(
                user_id,
                status="reading",
                message=f"[{f_idx + 1}/{len(files_data)}] 엑셀 파일을 읽는 중입니다 ({filename})...",
            )

            df = pd.read_excel(io.BytesIO(contents))
            df = df.where(pd.notnull(df), None)
            column_map = find_template_columns(list(df.columns))

            file_rows = len(df)
            total_rows += file_rows

            set_upload_state(
                user_id,
                status="processing",
                message=f"[{f_idx + 1}/{len(files_data)}] {filename}의 엑셀 데이터를 정리하는 중...",
                total_rows=total_rows,
            )

            for index, row in df.iterrows():
                rlist = list(row)
                recipient_phone = row_value(rlist, column_map, "recipient_phone")
                recipient_mobile = row_value(rlist, column_map, "recipient_mobile")
                tracking_number = row_value(rlist, column_map, "tracking_number")
                address = row_value(rlist, column_map, "address")

                order = Order(
                    order_date=row_value(rlist, column_map, "order_date"),
                    sequence_num=row_value(rlist, column_map, "sequence_num"),
                    order_no=row_value(rlist, column_map, "order_no"),
                    order_no_mall=row_value(rlist, column_map, "order_no_mall"),
                    recipient_name=row_value(rlist, column_map, "recipient_name"),
                    product_code=row_value(rlist, column_map, "product_code"),
                    product_name=row_value(rlist, column_map, "product_name"),
                    order_quantity=row_value(rlist, column_map, "order_quantity"),
                    address=address,
                    address_normalized=normalize_address_key(address),
                    postal_code=row_value(rlist, column_map, "postal_code"),
                    recipient_phone=recipient_phone,
                    recipient_mobile=recipient_mobile,
                    recipient_phone_normalized=normalize_phone(recipient_phone),
                    recipient_mobile_normalized=normalize_phone(recipient_mobile),
                    delivery_memo=row_value(rlist, column_map, "delivery_memo"),
                    tracking_number=tracking_number,
                    tracking_number_normalized=normalize_tracking(tracking_number),
                    vendor=row_value(rlist, column_map, "vendor"),
                    order_list_1=row_value(rlist, column_map, "order_list_1"),
                    order_note=row_value(rlist, column_map, "order_note"),
                    upload_date=datetime.now().strftime("%Y-%m-%d %H:%M:%S")
                )
                db_records.append(order)

                # 주기적으로 데이터 정리 진행률 갱신 (전체 누적 건수 기준)
                current_processed = len(db_records)
                if current_processed % 1000 == 0 and current_processed > 0:
                    calc_progress = float(current_processed) / total_rows if total_rows else 1
                    set_upload_state(
                        user_id,
                        status="processing",
                        message=f"전체 {current_processed}건 엑셀 데이터 정리 중...",
                        upload_progress=calc_progress * 100,
                        total_rows=total_rows,
                        processed_rows=current_processed,
                    )

        # 2단계: FTS 인덱스 및 DB 저장 단계
        set_upload_state(
            user_id,
            status="indexing",
            message="DB 저장과 검색 인덱스 반영을 시작합니다...",
            upload_progress=100,
            index_progress=0,
            total_rows=total_rows,
            processed_rows=total_rows,
        )

        batch_size = 1000
        for i in range(0, len(db_records), batch_size):
            chunk = db_records[i:i + batch_size]
            db.bulk_save_objects(chunk)
            indexed_rows = min(i + len(chunk), total_rows)
            index_progress = (indexed_rows / total_rows * 100) if total_rows else 100
            set_upload_state(
                user_id,
                status="indexing",
                message=f"{indexed_rows}/{total_rows}건 DB 저장 및 검색 인덱스 반영 중...",
                upload_progress=100,
                index_progress=index_progress,
                total_rows=total_rows,
                processed_rows=total_rows,
                indexed_rows=indexed_rows,
            )

        db.commit()

        set_upload_state(
            user_id,
            status="completed",
            message=f"완료: {len(db_records)}건 저장 및 검색 인덱스 반영",
            upload_progress=100,
            index_progress=100,
            total_rows=total_rows,
            processed_rows=total_rows,
            indexed_rows=total_rows,
        )
        log_event(
            current_user,
            "파일 업로드 완료",
            "success",
            {"filenames": filenames_str, "uploaded_count": len(db_records)},
        )
    except ValueError as e:
        db.rollback()
        set_upload_error(user_id, str(e))
        log_event(current_user, "파일 업로드 실패", "error", {"filenames": filenames_str, "error": str(e)})
    except Exception as e:
        db.rollback()
        set_upload_error(user_id, f"에러 발생: {str(e)}")
        log_event(current_user, "파일 업로드 실패", "error", {"filenames": filenames_str, "error": str(e)})
    finally:
        db.close()


@router.post("/upload")
def upload_file(
    files: list[UploadFile] = File(...),
    upload_token: str = Form(...),
    custom_date: str = Form(...),
    current_user = Depends(get_current_user),
    db: Session = Depends(get_db)
):
    # 1. 파일 확장자 검증
    for file in files:
        filename = file.filename or ""
        if not filename.endswith(".xls") and not filename.endswith(".xlsx"):
            raise HTTPException(status_code=400, detail="XLS 또는 XLSX 파일만 업로드할 수 있습니다.")

    filenames_str = ", ".join([f.filename for f in files])
    log_event(
        current_user,
        "파일 업로드 시작 (낱개 출고 자동분석)",
        "started",
        {"filenames": filenames_str, "custom_date": custom_date}
    )

    db_records = []
    try:
        # 2. 파일 파싱 및 데이터베이스 레코드 임시 적재
        for file in files:
            contents = file.file.read()
            df = pd.read_excel(io.BytesIO(contents))
            df = df.where(pd.notnull(df), None)
            column_map = find_template_columns(list(df.columns))

            for index, row in df.iterrows():
                rlist = list(row)
                recipient_phone = row_value(rlist, column_map, "recipient_phone")
                recipient_mobile = row_value(rlist, column_map, "recipient_mobile")
                tracking_number = row_value(rlist, column_map, "tracking_number")
                address = row_value(rlist, column_map, "address")

                order = Order(
                    order_date=custom_date, # 사용자가 지정한 주문 날짜 강제 입력
                    sequence_num=row_value(rlist, column_map, "sequence_num"),
                    order_no=row_value(rlist, column_map, "order_no"),
                    order_no_mall=row_value(rlist, column_map, "order_no_mall"),
                    recipient_name=row_value(rlist, column_map, "recipient_name"),
                    product_code=row_value(rlist, column_map, "product_code"),
                    product_name=row_value(rlist, column_map, "product_name"),
                    order_quantity=row_value(rlist, column_map, "order_quantity"),
                    address=address,
                    address_normalized=normalize_address_key(address),
                    postal_code=row_value(rlist, column_map, "postal_code"),
                    recipient_phone=recipient_phone,
                    recipient_mobile=recipient_mobile,
                    recipient_phone_normalized=normalize_phone(recipient_phone),
                    recipient_mobile_normalized=normalize_phone(recipient_mobile),
                    delivery_memo=row_value(rlist, column_map, "delivery_memo"),
                    tracking_number=tracking_number,
                    tracking_number_normalized=normalize_tracking(tracking_number),
                    vendor=row_value(rlist, column_map, "vendor"),
                    order_list_1=row_value(rlist, column_map, "order_list_1"),
                    order_note=row_value(rlist, column_map, "order_note"),
                    upload_date=datetime.now().strftime("%Y-%m-%d %H:%M:%S")
                )
                db_records.append(order)

        # 3. 데이터베이스 벌크 저장 및 커밋
        batch_size = 1000
        for i in range(0, len(db_records), batch_size):
            chunk = db_records[i:i + batch_size]
            db.bulk_save_objects(chunk)
        db.commit()
        log_event(
            current_user,
            "파일 업로드 DB 저장 완료",
            "success",
            {"filenames": filenames_str, "uploaded_count": len(db_records)}
        )

    except Exception as e:
        db.rollback()
        log_event(current_user, "파일 업로드 실패", "error", {"filenames": filenames_str, "error": str(e)})
        raise HTTPException(status_code=500, detail=f"데이터베이스 저장 실패: {str(e)}")

    # 4. 품목 마스터(itemcode_db) 연동 및 낱개 수량 환산 합계 계산
    try:
        item_engine = get_secondary_engine("ITEM_DB_NAME")
        
        single_items = {}
        set_components = {}
        
        if item_engine:
            with item_engine.connect() as conn:
                # 1) 단품 마스터 맵 구성
                rs_single = conn.execute(text("SELECT item_code, sabangnet_code, name FROM single_items"))
                for row in rs_single:
                    single_items[row[0]] = {
                        "sabangnet_code": row[1] or "",
                        "name": row[2] or ""
                    }
                # 2) 세트 구성품 맵 구성
                rs_comp = conn.execute(text("SELECT set_code, single_code, quantity FROM set_components"))
                for row in rs_comp:
                    s_code = row[0]
                    if s_code not in set_components:
                        set_components[s_code] = []
                    set_components[s_code].append({
                        "single_code": row[1],
                        "quantity": row[2]
                    })
        
        # 3) 낱개 환산 처리
        single_qty_sums = {}
        for order in db_records:
            prod_code = (order.product_code or "").strip()
            if not prod_code:
                continue
            
            qty = 1
            try:
                qty = int(order.order_quantity or 1)
            except:
                pass
                
            if prod_code in single_items:
                single_qty_sums[prod_code] = single_qty_sums.get(prod_code, 0) + qty
            elif prod_code in set_components:
                for comp in set_components[prod_code]:
                    s_code = comp["single_code"]
                    comp_qty = comp["quantity"]
                    single_qty_sums[s_code] = single_qty_sums.get(s_code, 0) + (qty * comp_qty)
            else:
                # DB에 등록되어 있지 않은 코드는 단품으로 간주하고, 사방넷코드와 이름을 보존
                single_items[prod_code] = {
                    "sabangnet_code": prod_code,
                    "name": order.product_name or ""
                }
                single_qty_sums[prod_code] = single_qty_sums.get(prod_code, 0) + qty
                
        # 5. 결과 엑셀 데이터 빌드
        excel_rows = []
        for s_code, total_qty in single_qty_sums.items():
            s_info = single_items.get(s_code, {"sabangnet_code": s_code, "name": ""})
            excel_rows.append({
                "상품코드[필수]": s_info["sabangnet_code"] or s_code,
                "가용수량": total_qty,
                "불용수량": s_info["name"] or "" # C열 헤더는 "불용수량", 실데이터는 이름!
            })
            
        df_out = pd.DataFrame(excel_rows)
        if df_out.empty:
            df_out = pd.DataFrame(columns=["상품코드[필수]", "가용수량", "불용수량"])
        else:
            df_out = df_out[["상품코드[필수]", "가용수량", "불용수량"]]
            
        # 엑셀 파일 쓰기
        excel_io = io.BytesIO()
        with pd.ExcelWriter(excel_io, engine='openpyxl') as writer:
            df_out.to_excel(writer, index=False)
        excel_io.seek(0)
        
        # 6. 다운로드 파일명 날짜 포맷 조합
        try:
            dt = datetime.strptime(custom_date, "%Y-%m-%d")
        except:
            dt = datetime.now()
            
        weekdays = ["월요일", "화요일", "수요일", "목요일", "금요일", "토요일", "일요일"]
        weekday_str = weekdays[dt.weekday()]
        
        # 형식 예: 05월 10일 (일요일)_발주_(낱개 상품 출고).xls
        filename = f"{dt.strftime('%m')}월 {dt.strftime('%d')}일 ({weekday_str})_발주_(낱개 상품 출고).xls"
        encoded_filename = quote(filename)
        
        headers = {
            "Content-Disposition": f"attachment; filename*=UTF-8''{encoded_filename}",
            "Access-Control-Expose-Headers": "Content-Disposition"
        }
        
        return StreamingResponse(
            excel_io,
            media_type="application/vnd.openxmlformats-officedocument.spreadsheetml.sheet",
            headers=headers
        )
        
    except Exception as e:
        log_event(current_user, "낱개 출고 분석 오류", "error", {"error": str(e)})
        raise HTTPException(status_code=500, detail=f"낱개 출고 분석 및 엑셀 생성 실패: {str(e)}")

@router.get("/progress")
async def upload_progress(
    upload_token: str,
    current_user = Depends(get_current_user)
):
    user_id = f"{current_user.id}:{upload_token}"
    
    async def event_generator():
        while True:
            if user_id in upload_progress_state:
                state = upload_progress_state[user_id]
                yield f"data: {json.dumps(state, ensure_ascii=False)}\n\n"
                
                # Stop streaming connection if done or error
                if state["status"] in ["completed", "error"]:
                    upload_progress_state.pop(user_id, None)
                    break
            else:
                yield f"data: {json.dumps({'status': 'idle'}, ensure_ascii=False)}\n\n"
            
            await asyncio.sleep(0.5)

    return StreamingResponse(event_generator(), media_type="text/event-stream")

@router.get("/search")
async def search_orders(
    name: Optional[str] = None,
    tracking: Optional[str] = None,
    phone: Optional[str] = None,
    address: Optional[str] = None,
    order_start_date: Optional[str] = None,
    order_end_date: Optional[str] = None,
    page: int = 1,
    size: int = 27,
    db: Session = Depends(get_db),
    current_user = Depends(get_current_user)
):
    query, has_filters = build_order_search_query(
        db,
        name=name,
        tracking=tracking,
        phone=phone,
        address=address,
        order_start_date=order_start_date,
        order_end_date=order_end_date,
    )

    # If no parameters are provided, return empty
    if not has_filters:
        return {"items": [], "total": 0, "page": page, "size": size}

    total = query.count()
    offset = (page - 1) * size
    
    orders = query.order_by(Order.order_date.desc(), Order.id.desc()).offset(offset).limit(size).all()
    page_address_keys = sorted({normalize_address_key(order.address) for order in orders if normalize_address_key(order.address)})
    page_phones = sorted(
        {
            normalize_phone(order.recipient_mobile or order.recipient_phone)
            for order in orders
            if normalize_phone(order.recipient_mobile or order.recipient_phone)
        }
    )
    address_date_counts = {}
    phone_date_counts = {}
    order_date_key = func.substr(Order.order_date, 1, 10)
    if page_address_keys:
        address_date_counts = dict(
            db.query(
                Order.address_normalized,
                func.count(func.distinct(order_date_key)),
            )
            .filter(Order.address_normalized.in_(page_address_keys))
            .group_by(Order.address_normalized)
            .all()
        )
    if page_phones:
        phone_date_sets = {phone_value: set() for phone_value in page_phones}
        phone_rows = (
            db.query(
                Order.recipient_mobile_normalized,
                Order.recipient_phone_normalized,
                order_date_key,
            )
            .filter(
                or_(
                    Order.recipient_mobile_normalized.in_(page_phones),
                    Order.recipient_phone_normalized.in_(page_phones),
                )
            )
            .all()
        )
        for mobile_normalized, phone_normalized, date_key in phone_rows:
            if mobile_normalized in phone_date_sets:
                if date_key:
                    phone_date_sets[mobile_normalized].add(date_key)
            if phone_normalized in phone_date_sets:
                if date_key:
                    phone_date_sets[phone_normalized].add(date_key)
        phone_date_counts = {
            phone_value: len(date_keys)
            for phone_value, date_keys in phone_date_sets.items()
        }

    for order in orders:
        address_key = normalize_address_key(order.address)
        order.address_order_count = address_date_counts.get(address_key, 0) if address_key else 0
        display_phone_normalized = normalize_phone(order.recipient_mobile or order.recipient_phone)
        order.phone_order_count = phone_date_counts.get(display_phone_normalized, 0) if display_phone_normalized else 0
    apply_customer_notes(db, orders)
    apply_order_notes(db, orders)
    
    return {
        "items": [order_to_search_item(order) for order in orders],
        "total": total,
        "page": page,
        "size": size,
        "total_pages": math.ceil(total / size) if size > 0 else 0
    }


@router.get("/export-search")
async def export_search_orders(
    name: Optional[str] = None,
    tracking: Optional[str] = None,
    phone: Optional[str] = None,
    address: Optional[str] = None,
    order_start_date: Optional[str] = None,
    order_end_date: Optional[str] = None,
    db: Session = Depends(get_db),
    current_user = Depends(get_current_user)
):
    query, has_filters = build_order_search_query(
        db,
        name=name,
        tracking=tracking,
        phone=phone,
        address=address,
        order_start_date=order_start_date,
        order_end_date=order_end_date,
    )
    if not has_filters:
        raise HTTPException(status_code=400, detail="검색 조건이 없습니다.")

    orders = query.order_by(Order.order_date.desc(), Order.id.desc()).all()
    if not orders:
        raise HTTPException(status_code=404, detail="다운로드할 검색 결과가 없습니다.")

    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")
    log_event(
        current_user,
        "검색 결과 엑셀 다운로드",
        "success",
        {
            "download_count": len(orders),
            "name": name,
            "phone": phone,
            "address": address,
            "tracking": tracking,
            "start_date": order_start_date,
            "end_date": order_end_date,
        },
    )
    return orders_to_excel_response(orders, f"검색결과_{timestamp}.xlsx", "Search_Results")

class DeleteOrdersRequest(BaseModel):
    order_ids: list[int]


class UpdateOrderContactRequest(BaseModel):
    recipient_name: str
    address: str
    recipient_mobile: str
    customer_note: Optional[str] = None
    order_note: Optional[str] = None
    note: str = ""


class DeleteSingleOrderRequest(BaseModel):
    password: str


class ReturnRequestPayload(BaseModel):
    request_date: str
    request_type: str
    remarks: str = ""
    tracking_no: Optional[str] = None
    receiver_name: Optional[str] = None
    address: Optional[str] = None
    phone: Optional[str] = None


@router.put("/{order_id}/contact")
async def update_order_contact(
    order_id: int,
    req: UpdateOrderContactRequest,
    db: Session = Depends(get_db),
    current_user = Depends(get_current_user)
):
    order = db.query(Order).filter(Order.id == order_id).first()
    if not order:
        log_event(current_user, "주문 정보 수정", "error", {"order_id": order_id, "error": "not_found"})
        raise HTTPException(status_code=404, detail="주문 데이터를 찾을 수 없습니다.")

    before = {
        "recipient_name": order.recipient_name,
        "address": order.address,
        "recipient_mobile": order.recipient_mobile,
        "customer_note": order.customer_note,
        "order_note": order.order_note,
        "note": order.note,
    }
    new_name = req.recipient_name.strip() or None
    new_phone = req.recipient_mobile.strip() or None
    new_phone_normalized = normalize_phone(new_phone)
    new_customer_note = (
        req.customer_note if req.customer_note is not None else req.note
    ).strip() or None
    new_order_note = (req.order_note or "").strip() or None

    order.recipient_name = new_name
    order.address = req.address.strip() or None
    order.address_normalized = normalize_address_key(order.address)
    order.recipient_mobile = new_phone
    order.recipient_mobile_normalized = new_phone_normalized

    customer_note_updated_count = 1
    customer_phone_normalized = new_phone_normalized or normalize_phone(order.recipient_phone)
    if new_name and customer_phone_normalized:
        customer_note_targets = (
            db.query(Order)
            .filter(func.trim(Order.recipient_name) == new_name)
            .filter(
                or_(
                    Order.recipient_mobile_normalized == customer_phone_normalized,
                    Order.recipient_phone_normalized == customer_phone_normalized,
                )
            )
            .all()
        )
        for target_order in customer_note_targets:
            target_order.customer_note = new_customer_note
        customer_note_updated_count = len(customer_note_targets)

    order_note_updated_count = 1
    current_order_note_key = order_note_key(order)
    if current_order_note_key:
        order_note_targets = (
            db.query(Order)
            .filter(
                or_(
                    Order.order_no_mall == current_order_note_key,
                    Order.order_no == current_order_note_key,
                )
            )
            .all()
        )
        for target_order in order_note_targets:
            target_order.order_note = new_order_note
        order_note_updated_count = len(order_note_targets)
    order.customer_note = new_customer_note
    order.order_note = new_order_note
    db.commit()
    db.refresh(order)
    log_event(
        current_user,
        "주문 정보 수정",
        "success",
        {
            "order_id": order.id,
            "order_no": order.order_no,
            "order_no_mall": order.order_no_mall,
            "before": before,
            "after": {
                "recipient_name": order.recipient_name,
                "address": order.address,
                "recipient_mobile": order.recipient_mobile,
                "customer_note": order.customer_note,
                "order_note": order.order_note,
                "note": order.note,
            },
            "customer_note_updated_count": customer_note_updated_count,
            "order_note_updated_count": order_note_updated_count,
            "submitted_customer_note_length": len(
                req.customer_note if req.customer_note is not None else req.note or ""
            ),
            "submitted_order_note_length": len(req.order_note or ""),
        },
    )

    return {
        "message": "주문 정보가 수정되었습니다.",
        "order_id": order.id,
        "customer_note": order.customer_note,
        "order_note": order.order_note,
        "note": order.note,
        "customer_note_updated_count": customer_note_updated_count,
        "order_note_updated_count": order_note_updated_count,
    }


@router.post("/{order_id}/return-request")
async def send_return_request(
    order_id: int,
    req: ReturnRequestPayload,
    db: Session = Depends(get_db),
    current_user = Depends(get_current_user),
):
    order = db.query(Order).filter(Order.id == order_id).first()
    if not order:
        log_event(current_user, "반품 신청 전송", "error", {"order_id": order_id, "error": "not_found"})
        raise HTTPException(status_code=404, detail="주문 데이터를 찾을 수 없습니다.")

    payload = {
        "request_date": (req.request_date or "").strip(),
        "request_type": (req.request_type or "").strip(),
        "receiver_name": (req.receiver_name or order.recipient_name or "").strip(),
        "address": (req.address or order.address or "").strip(),
        "phone": (req.phone or order.recipient_mobile or order.recipient_phone or "").strip(),
        "tracking_no": (req.tracking_no or order.tracking_number or "").strip(),
        "mall": (order.vendor or "").strip(),
        "remarks": (req.remarks or "").strip(),
    }

    missing_fields = [
        key for key in ("request_date", "request_type")
        if payload[key] == ""
    ]
    if missing_fields:
        log_event(
            current_user,
            "반품 신청 전송",
            "error",
            {
                "order_id": order_id,
                "missing_fields": missing_fields,
                "payload": payload,
            },
        )
        raise HTTPException(
            status_code=400,
            detail=f"반품 신청 필수값이 비어 있습니다: {', '.join(missing_fields)}",
        )

    log_event(
        current_user,
        "반품 신청 전송 요청",
        "info",
        {
            "order_id": order_id,
            "endpoint": CS_RETURN_REQUEST_URL,
            "payload": payload,
        },
    )

    try:
        timeout = httpx.Timeout(connect=2.0, read=5.0, write=3.0, pool=2.0)
        headers = {}
        if INTERNAL_SERVICE_TOKEN:
            headers["X-Service-Token"] = INTERNAL_SERVICE_TOKEN
        async with httpx.AsyncClient(timeout=timeout, trust_env=False) as client:
            response = await client.post(CS_RETURN_REQUEST_URL, json=payload, headers=headers)
            response.raise_for_status()
    except httpx.HTTPStatusError as exc:
        response_text = exc.response.text[:1000] if exc.response is not None else ""
        log_event(
            current_user,
            "반품 신청 전송",
            "error",
            {
                "order_id": order_id,
                "status_code": exc.response.status_code if exc.response is not None else None,
                "response": response_text,
                "payload": payload,
            },
        )
        raise HTTPException(
            status_code=502,
            detail=f"CS 관리 프로그램 반품 신청 오류: HTTP {exc.response.status_code}",
        )
    except httpx.RequestError as exc:
        log_event(
            current_user,
            "반품 신청 전송",
            "error",
            {
                "order_id": order_id,
                "endpoint": CS_RETURN_REQUEST_URL,
                "error": str(exc),
                "payload": payload,
            },
        )
        raise HTTPException(status_code=502, detail=f"CS 관리 프로그램 연결 오류: {str(exc)}")

    log_event(
        current_user,
        "반품 신청 전송",
        "success",
        {
            "order_id": order_id,
            "endpoint": CS_RETURN_REQUEST_URL,
            "payload": payload,
            "status_code": response.status_code,
        },
    )
    return {
        "message": "반품 신청 데이터가 CS 관리 프로그램으로 전송되었습니다.",
        "status_code": response.status_code,
        "payload": payload,
    }


@router.post("/{order_id}/delete")
@router.delete("/{order_id}")
async def delete_single_order(
    order_id: int,
    req: DeleteSingleOrderRequest,
    db: Session = Depends(get_db),
    current_user = Depends(get_current_user)
):
    log_event(current_user, "주문 단건 삭제 요청", "info", {"order_id": order_id})
    if req.password != "1225":
        log_event(current_user, "주문 단건 삭제", "error", {"order_id": order_id, "error": "invalid_password"})
        raise HTTPException(status_code=403, detail="비밀번호가 올바르지 않습니다.")

    order = db.query(Order).filter(Order.id == order_id).first()
    if not order:
        log_event(current_user, "주문 단건 삭제", "error", {"order_id": order_id, "error": "not_found"})
        raise HTTPException(status_code=404, detail="주문 데이터를 찾을 수 없습니다.")

    deleted_order = {
        "order_id": order.id,
        "order_date": order.order_date,
        "order_no": order.order_no,
        "order_no_mall": order.order_no_mall,
        "recipient_name": order.recipient_name,
        "recipient_mobile": order.recipient_mobile,
        "recipient_phone": order.recipient_phone,
        "product_code": order.product_code,
        "product_name": order.product_name,
        "order_quantity": order.order_quantity,
        "vendor": order.vendor,
        "note": order.note,
    }

    try:
        db.delete(order)
        db.commit()
        log_event(current_user, "주문 단건 삭제", "success", deleted_order)
        return {"message": "주문이 삭제되었습니다.", "deleted_count": 1, "order_id": order_id}
    except Exception as e:
        db.rollback()
        log_event(current_user, "주문 단건 삭제", "error", {**deleted_order, "error": str(e)})
        raise HTTPException(status_code=500, detail=f"주문 삭제 오류: {str(e)}")


@router.post("/delete")
async def delete_orders(
    req: DeleteOrdersRequest,
    db: Session = Depends(get_db),
    current_user = Depends(get_current_user)
):
    if not current_user.is_admin:
        raise HTTPException(status_code=403, detail="Not authorized to delete data.")
        
    if not req.order_ids:
        return {"message": "No orders selected for deletion.", "deleted_count": 0}
        
    try:
        deleted_count = db.query(Order).filter(Order.id.in_(req.order_ids)).delete(synchronize_session=False)
        db.commit()
        return {"message": f"성공적으로 {deleted_count}건의 데이터를 삭제했습니다.", "deleted_count": deleted_count}
    except Exception as e:
        db.rollback()
        raise HTTPException(status_code=500, detail=str(e))