"""顺丰月结列表、结算、补填。只处理 transport_mode = sfkd。"""
from __future__ import annotations

from datetime import datetime
from typing import Any, Dict, List, Optional, Tuple

from sqlalchemy.orm import Session

from app.core.data_scope import apply_data_scope
from app.crud.sample_freight import _fmt_dt, _normalize_date_bound, _user_nick_name_map
from app.models.models import BizSampleFreight
from app.services.sf_express_settlement import (
    SF_TRANSPORT_MODE,
    SETTLE_SETTLED,
    assert_settle_request,
    freight_amount_label,
    plan_fill_amount,
    plan_settle,
)


def _base_query(db: Session, *, tenant_no: str, user_info: Optional[dict]):
    query = db.query(BizSampleFreight).filter(
        BizSampleFreight.tenant_no == tenant_no,
        BizSampleFreight.del_flag == 0,
        BizSampleFreight.transport_mode == SF_TRANSPORT_MODE,
    )
    return apply_data_scope(query, BizSampleFreight, user_info, db, tenant_no)


def _apply_filters(
    query,
    *,
    waybill_no: Optional[str],
    settle_status: Optional[str],
    create_time_from: Optional[str],
    create_time_to: Optional[str],
):
    waybill = (waybill_no or "").strip()
    if waybill:
        query = query.filter(BizSampleFreight.waybill_no.like(f"%{waybill}%"))
    status = (settle_status or "").strip()
    if status:
        query = query.filter(BizSampleFreight.settle_status == status)
    if create_time_from and str(create_time_from).strip():
        query = query.filter(
            BizSampleFreight.create_time
            >= _normalize_date_bound(str(create_time_from).strip())
        )
    if create_time_to and str(create_time_to).strip():
        query = query.filter(
            BizSampleFreight.create_time
            <= _normalize_date_bound(str(create_time_to).strip(), end_of_day=True)
        )
    return query


def _to_row(obj: BizSampleFreight, create_by_name: str) -> Dict[str, Any]:
    amount = obj.freight_amount
    status = obj.settle_status or ""
    return {
        "id": obj.id,
        "waybillNo": obj.waybill_no or "",
        "createBy": obj.create_by or "",
        "createByName": create_by_name or obj.create_by or "",
        "createTime": _fmt_dt(obj.create_time),
        "settleStatus": status,
        "settleStatusLabel": "已结算" if status == SETTLE_SETTLED else "未结算",
        "freightAmount": float(amount) if amount is not None else None,
        "freightAmountLabel": freight_amount_label(obj.transport_mode, amount),
        "settleTime": _fmt_dt(obj.settle_time) if obj.settle_time else "",
        "transportMode": obj.transport_mode or "",
    }


def list_sf_settlements(
    db,
    *,
    tenant_no: str,
    user_info: Optional[dict],
    page: int = 1,
    page_size: int = 10,
    waybill_no: Optional[str] = None,
    settle_status: Optional[str] = None,
    create_time_from: Optional[str] = None,
    create_time_to: Optional[str] = None,
) -> Tuple[List[Dict[str, Any]], int]:
    page = max(1, int(page or 1))
    page_size = max(1, min(100, int(page_size or 10)))
    query = _apply_filters(
        _base_query(db, tenant_no=tenant_no, user_info=user_info),
        waybill_no=waybill_no,
        settle_status=settle_status,
        create_time_from=create_time_from,
        create_time_to=create_time_to,
    )
    total = query.count()
    rows = (
        query.order_by(BizSampleFreight.create_time.desc(), BizSampleFreight.id.desc())
        .offset((page - 1) * page_size)
        .limit(page_size)
        .all()
    )
    names = _user_nick_name_map(db, [row.create_by for row in rows if row.create_by])
    return [_to_row(row, names.get(row.create_by or "", "")) for row in rows], total


def list_sf_settlements_for_export(
    db,
    *,
    tenant_no: str,
    user_info: Optional[dict],
    waybill_no: Optional[str] = None,
    settle_status: Optional[str] = None,
    create_time_from: Optional[str] = None,
    create_time_to: Optional[str] = None,
) -> List[Dict[str, Any]]:
    query = _apply_filters(
        _base_query(db, tenant_no=tenant_no, user_info=user_info),
        waybill_no=waybill_no,
        settle_status=settle_status,
        create_time_from=create_time_from,
        create_time_to=create_time_to,
    )
    rows = query.order_by(
        BizSampleFreight.create_time.desc(), BizSampleFreight.id.desc()
    ).all()
    if not rows:
        raise ValueError("没有可导出的数据")
    names = _user_nick_name_map(db, [row.create_by for row in rows if row.create_by])
    return [_to_row(row, names.get(row.create_by or "", "")) for row in rows]


def _lock_rows(
    db, *, tenant_no: str, user_info: Optional[dict], ids: List[str]
) -> List[BizSampleFreight]:
    wanted = [str(item or "").strip() for item in ids if str(item or "").strip()]
    rows = (
        _base_query(db, tenant_no=tenant_no, user_info=user_info)
        .filter(BizSampleFreight.id.in_(wanted))
        .all()
    )
    if len(rows) != len(set(wanted)):
        raise ValueError("运费批次不存在")
    return rows


def settle_sf_freights(
    db,
    *,
    tenant_no: str,
    user_id: Optional[str],
    user_info: Optional[dict],
    ids: List[str],
    freight_amount: Any = None,
):
    assert_settle_request(ids, freight_amount)
    rows = _lock_rows(db, tenant_no=tenant_no, user_info=user_info, ids=ids)
    now = datetime.now()
    submitted = None if len(ids) != 1 else freight_amount
    for obj in rows:
        if obj.transport_mode != SF_TRANSPORT_MODE:
            raise ValueError("只能结算顺丰快递运费")
        if (obj.settle_status or "") == SETTLE_SETTLED:
            raise ValueError("该运费已结算")
        amount, status, settle_time = plan_settle(
            current_amount=obj.freight_amount, submitted_amount=submitted, now=now
        )
        obj.freight_amount = amount
        obj.settle_status = status
        obj.settle_time = settle_time
        obj.update_by = user_id
        obj.update_time = now
    db.commit()
    return {"ids": [row.id for row in rows]}


def fill_sf_freight_amount(
    db,
    *,
    tenant_no: str,
    user_id: Optional[str],
    user_info: Optional[dict],
    freight_id: str,
    freight_amount: Any,
):
    rows = _lock_rows(db, tenant_no=tenant_no, user_info=user_info, ids=[freight_id])
    obj = rows[0]
    if obj.transport_mode != SF_TRANSPORT_MODE:
        raise ValueError("只能补填顺丰快递运费")
    obj.freight_amount = plan_fill_amount(
        current_amount=obj.freight_amount,
        settle_status=obj.settle_status,
        submitted_amount=freight_amount,
    )
    obj.update_by = user_id
    obj.update_time = datetime.now()
    db.commit()
    return {"id": obj.id}