"""批量发放把同一备注和附件写到每张待发放报销单，实际金额按单提交。"""
from datetime import date, datetime

from fastapi import HTTPException
from sqlalchemy import create_engine
from sqlalchemy.orm import sessionmaker

from app.core.bx_auth import BxUserContext
from app.models.bx_models import BxAttachment, BxReimburseApply, BxReimburseOffset, BxReimbursePayment
from app.services.bx.reimburse import ReimburseService

TENANT = "shanxia2.0"
NOW = datetime(2026, 11, 4, 15, 0, 0)


def _session():
    engine = create_engine("sqlite://")
    BxReimburseApply.__table__.create(engine)
    BxReimburseOffset.__table__.create(engine)
    BxReimbursePayment.__table__.create(engine)
    BxAttachment.__table__.create(engine)
    return sessionmaker(bind=engine)()


def _user() -> BxUserContext:
    return BxUserContext(
        id="finance-1",
        name="财务",
        dept_id="dept",
        role="super_admin",
        tenant_no=TENANT,
    )


def _apply(*, apply_id: str, amount: float, status: str = "approved", pay_status: str = None) -> BxReimburseApply:
    return BxReimburseApply(
        id=apply_id,
        apply_code=apply_id,
        title=f"报销{apply_id}",
        reimburse_date=date(2026, 11, 4),
        applicant_id="applicant",
        applicant_name="汪璇",
        expense_id="58",
        expense_name="车辆用品费",
        amount=amount,
        status=status,
        pay_status=pay_status,
        tenant_no=TENANT,
        create_dept_id="dept",
        create_time=NOW,
        update_time=NOW,
        del_flag=0,
    )


def _attachment(attachment_id: str = "att-1") -> BxAttachment:
    return BxAttachment(
        id=attachment_id,
        biz_type="reimburse_pay",
        biz_id="0",
        file_name="发放截图.png",
        file_path="bx/reimburse_pay/shot.png",
        file_type="image/png",
        file_size=12,
        tenant_no=TENANT,
        create_dept_id="dept",
        create_time=NOW,
        del_flag=0,
    )


def test_batch_pay_writes_shared_remark_and_attachment_with_per_bill_amount():
    db = _session()
    db.add_all([_apply(apply_id="BX-A", amount=100), _apply(apply_id="BX-B", amount=80.5)])
    db.add(_attachment())
    db.commit()

    rows = ReimburseService.batch_pay(
        db,
        [{"id": "BX-A", "actual_amount": 100}, {"id": "BX-B", "actual_amount": 70}],
        _user(),
        pay_remark="同一批次发放",
        attachment_ids=["att-1"],
    )
    db.commit()

    assert [row.id for row in rows] == ["BX-A", "BX-B"]
    saved = {row.id: row for row in db.query(BxReimburseApply).all()}
    assert saved["BX-A"].status == "processed"
    assert saved["BX-A"].pay_status == "paid"
    assert float(saved["BX-A"].actual_amount) == 100
    assert saved["BX-A"].pay_remark == "同一批次发放"
    assert float(saved["BX-B"].actual_amount) == 70
    assert saved["BX-B"].pay_remark == "同一批次发放"
    assert saved["BX-A"].remark is None

    copies = (
        db.query(BxAttachment)
        .filter(BxAttachment.del_flag == 0, BxAttachment.biz_type == "reimburse_pay")
        .order_by(BxAttachment.biz_id)
        .all()
    )
    assert [(row.biz_id, row.file_path) for row in copies] == [
        ("BX-A", "bx/reimburse_pay/shot.png"),
        ("BX-B", "bx/reimburse_pay/shot.png"),
    ]
    assert db.query(BxAttachment).filter(BxAttachment.id == "att-1").one().del_flag == 1


def test_batch_pay_rejects_non_pending_bill_without_writing_the_others():
    db = _session()
    db.add_all(
        [
            _apply(apply_id="BX-A", amount=100),
            _apply(apply_id="BX-B", amount=80, status="processed", pay_status="paid"),
        ]
    )
    db.commit()

    try:
        ReimburseService.batch_pay(
            db,
            [{"id": "BX-A", "actual_amount": 100}, {"id": "BX-B", "actual_amount": 80}],
            _user(),
            pay_remark="不应写入",
        )
    except HTTPException as exc:
        assert exc.status_code == 400
        db.rollback()
    else:
        raise AssertionError("expected batch pay to reject a paid bill")

    saved = {row.id: row for row in db.query(BxReimburseApply).all()}
    assert saved["BX-A"].status == "approved"
    assert saved["BX-A"].pay_status is None
    assert saved["BX-A"].pay_remark is None
    assert saved["BX-B"].pay_remark is None