"""审批轮次过滤 — 驳回后重新提交时，进度接口仅展示当前轮次。"""
from __future__ import annotations

from datetime import datetime
from typing import List, Sequence, TypeVar

T = TypeVar("T")


def filter_current_cycle_approvals(
    approvals: Sequence[T],
    apply_status: str,
    *,
    status_attr: str = "approval_status",
    time_attr: str = "approval_time",
) -> List[T]:
    """审批进度仅展示当前轮次；完整历史由 get_approval_history 返回。"""
    rejections = [a for a in approvals if getattr(a, status_attr) == "rejected"]
    if not rejections:
        return list(approvals)

    sorted_rejections = sorted(
        rejections,
        key=lambda a: getattr(a, time_attr) or datetime.min,
    )
    last_rejection_time = getattr(sorted_rejections[-1], time_attr) or datetime.min

    if apply_status != "rejected":
        return [
            a
            for a in approvals
            if (getattr(a, time_attr) or datetime.min) > last_rejection_time
        ]

    cycle_start = datetime.min
    if len(sorted_rejections) >= 2:
        cycle_start = getattr(sorted_rejections[-2], time_attr) or datetime.min
    return [
        a
        for a in approvals
        if (getattr(a, time_attr) or datetime.min) > cycle_start
    ]