from __future__ import annotations

from datetime import UTC, datetime

from flask import Blueprint, flash, g, redirect, render_template, request, url_for

from app.auth import role_required
from app.extensions import db
from app.models import Account
from app.services import (
    ATTENDANCE_STATUS_OPTIONS,
    DEFAULT_HOMEPAGE_PER_PAGE,
    HOMEPAGE_PER_PAGE_OPTIONS,
    INVITE_STATUS_OPTIONS,
    SIDE_OPTIONS,
    AGE_GROUP_LABELS,
    AGE_GROUP_OPTIONS,
    GIFT_RECORD_TYPE_LABELS,
    GIFT_RECORD_TYPE_OPTIONS,
    GENDER_LABELS,
    GENDER_OPTIONS,
    RELATION_TO_HEAD_OPTIONS,
    SORT_FIELD_LABELS,
    SORT_FIELD_OPTIONS,
    SORT_ORDER_OPTIONS,
    build_new_gift_record_draft,
    build_new_household_draft,
    build_new_member_draft,
    ensure_relation_category_option,
    ensure_tag_options,
    get_gift_record_or_none,
    get_filtered_homepage_stats,
    get_homepage_stats,
    get_household_or_none,
    get_member_or_none,
    gift_record_type_label,
    household_has_active_gift_records,
    is_head_name_taken,
    is_household_code_taken,
    list_enabled_options,
    list_gift_records,
    list_members,
    paginate_households_for_homepage,
    parse_admin_form,
    parse_new_relation_category_label,
    parse_new_tag_labels,
    parse_gift_record_form,
    parse_member_form,
    recalculate_household_gift_summary,
    serialize_admin_edit_snapshot,
    serialize_gift_record_snapshot,
    serialize_member_snapshot,
    write_audit_log,
)

main_bp = Blueprint("main", __name__)


def _admin_index_context() -> dict[str, object]:
    search_term = request.args.get("q", "").strip()
    side = request.args.get("side", "").strip()
    invite_status = request.args.get("invite_status", "").strip()
    attendance_status = request.args.get("attendance_status", "").strip()
    tag_option_id = request.args.get("tag_option_id", type=int)
    sort_by = request.args.get("sort_by", "updated_at").strip()
    sort_order = request.args.get("sort_order", "desc").strip()
    page = request.args.get("page", type=int) or 1
    per_page = request.args.get("per_page", type=int) or DEFAULT_HOMEPAGE_PER_PAGE

    if sort_by not in SORT_FIELD_OPTIONS:
        sort_by = "updated_at"
    if sort_order not in SORT_ORDER_OPTIONS:
        sort_order = "desc"
    if per_page not in HOMEPAGE_PER_PAGE_OPTIONS:
        per_page = DEFAULT_HOMEPAGE_PER_PAGE
    tag_options = list_enabled_options("tag")
    if tag_option_id not in {option.id for option in tag_options}:
        tag_option_id = None

    paginated_households = paginate_households_for_homepage(
        search_term=search_term,
        side=side,
        invite_status=invite_status,
        attendance_status=attendance_status,
        tag_option_id=tag_option_id,
        sort_by=sort_by,
        sort_order=sort_order,
        page=page,
        per_page=per_page,
    )
    stats = get_homepage_stats()
    filtered_stats = get_filtered_homepage_stats(paginated_households.filtered_households)
    return {
        "households": paginated_households.items,
        "search_term": search_term,
        "side": side,
        "invite_status": invite_status,
        "attendance_status": attendance_status,
        "tag_option_id": tag_option_id,
        "tag_options": tag_options,
        "sort_by": sort_by,
        "sort_order": sort_order,
        "page": paginated_households.page,
        "per_page": paginated_households.per_page,
        "per_page_options": HOMEPAGE_PER_PAGE_OPTIONS,
        "total_pages": paginated_households.total_pages,
        "has_prev": paginated_households.has_prev,
        "has_next": paginated_households.has_next,
        "page_start": paginated_households.page_start,
        "page_end": paginated_households.page_end,
        "side_options": SIDE_OPTIONS,
        "invite_status_options": INVITE_STATUS_OPTIONS,
        "attendance_status_options": ATTENDANCE_STATUS_OPTIONS,
        "sort_field_options": SORT_FIELD_OPTIONS,
        "sort_field_labels": SORT_FIELD_LABELS,
        "stats": stats,
        "filtered_stats": filtered_stats,
        "filtered_count": paginated_households.filtered_count,
    }


def _is_partial_request(expected_partial: str) -> bool:
    requested_partial = request.args.get("partial", "").strip()
    header_partial = request.headers.get("X-HW-Partial", "").strip()
    return requested_partial == expected_partial or header_partial == expected_partial


def _admin_index_redirect_from_values(values) -> str:
    params: dict[str, object] = {}
    for key in ("q", "side", "invite_status", "attendance_status", "sort_by", "sort_order"):
        raw_value = values.get(key, "")
        normalized = raw_value.strip() if isinstance(raw_value, str) else raw_value
        if normalized:
            params[key] = normalized

    for key in ("tag_option_id", "page", "per_page"):
        raw_value = values.get(key, "")
        normalized = raw_value.strip() if isinstance(raw_value, str) else raw_value
        if normalized not in ("", None):
            params[key] = normalized

    return url_for("main.index", **params)


@main_bp.get("/")
@role_required("admin", "editor")
def index() -> str:
    context = _admin_index_context()
    if _is_partial_request("results"):
        return render_template("main/_household_results.html", **context)
    return render_template("main/index.html", **context)


@main_bp.get("/households/new")
@role_required("admin", "editor")
def new_household() -> str:
    return render_template(
        "main/household_edit.html",
        household=build_new_household_draft(),
        gift_records=[],
        relation_category_options=list_enabled_options("relation_category"),
        relation_detail_options=list_enabled_options("relation_detail"),
        tag_options=list_enabled_options("tag"),
        gift_method_options=list_enabled_options("gift_method"),
        gift_scene_options=list_enabled_options("gift_scene"),
        is_create_mode=True,
        form_title="新增一户",
        form_intro="只需填写户主姓名即可创建，户编码会自动生成；创建成功后会自动进入编辑页继续补充。",
        submit_label="创建户信息",
    )


@main_bp.post("/households")
@role_required("admin", "editor")
def create_household():
    redirect_target = url_for("main.new_household")
    relation_category_options = list_enabled_options("relation_category")
    tag_options = list_enabled_options("tag")
    gift_method_options = list_enabled_options("gift_method")
    gift_scene_options = list_enabled_options("gift_scene")
    payload, errors = parse_admin_form(
        dict(request.form),
        raw_tag_option_ids=request.form.getlist("tag_option_ids_json"),
        valid_relation_category_ids={option.id for option in relation_category_options},
        relation_detail_parent_map={},
        valid_tag_ids={option.id for option in tag_options},
        valid_method_ids={option.id for option in gift_method_options},
        valid_scene_ids={option.id for option in gift_scene_options},
        require_household_code=False,
    )
    if errors:
        for error in errors:
            flash(error, "error")
        return redirect(redirect_target)

    new_relation_category_label, relation_category_errors = parse_new_relation_category_label(
        request.form.get("new_relation_category_label", ""),
    )
    if relation_category_errors:
        for error in relation_category_errors:
            flash(error, "error")
        return redirect(redirect_target)

    new_tag_labels, tag_label_errors = parse_new_tag_labels(request.form.get("new_tag_labels", ""))
    if tag_label_errors:
        for error in tag_label_errors:
            flash(error, "error")
        return redirect(redirect_target)

    head_name = str(payload["head_name"])
    if is_head_name_taken(head_name):
        flash("户主姓名已存在，请修改后重试。", "error")
        return redirect(redirect_target)

    household_code = payload.get("household_code")
    normalized_household_code = str(household_code) if household_code else None
    if normalized_household_code and is_household_code_taken(normalized_household_code):
        flash("户编码已存在，请换一个新的户编码。", "error")
        return redirect(redirect_target)

    current_account = g.current_account
    created_relation_category = ensure_relation_category_option(
        new_relation_category_label,
        actor_id=current_account.id if isinstance(current_account, Account) else None,
    )
    if created_relation_category is not None:
        payload["relation_category_option_id"] = created_relation_category.id
        payload["relation_detail_option_id"] = None

    created_tag_options = ensure_tag_options(
        new_tag_labels,
        actor_id=current_account.id if isinstance(current_account, Account) else None,
    )
    if created_tag_options:
        existing_ids = set(payload["tag_option_ids_json"]) if isinstance(payload["tag_option_ids_json"], list) else set()
        payload["tag_option_ids_json"] = sorted(existing_ids | {option.id for option in created_tag_options})

    household = build_new_household_draft(household_code=normalized_household_code)
    for field_name, value in payload.items():
        if field_name == "household_code" and value is None:
            continue
        setattr(household, field_name, value)

    if isinstance(current_account, Account):
        household.created_by = current_account.id
        household.updated_by = current_account.id

    db.session.add(household)
    db.session.flush()
    write_audit_log(
        action_type="create_household",
        target_type="household",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=household.id,
        target_display_name=household.head_name,
        after_data=serialize_admin_edit_snapshot(household),
        commit=False,
    )
    db.session.commit()
    flash(f"已创建户 {household.head_name}（{household.household_code}）。", "success")
    return redirect(url_for("main.edit_household", household_id=household.id))


@main_bp.get("/households/<int:household_id>/edit")
@role_required("admin", "editor")
def edit_household(household_id: int):
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要编辑的户信息。", "error")
        return redirect(url_for("main.index"))

    members = list_members(household_id)
    gift_records = list_gift_records(household_id)
    new_gift_record = build_new_gift_record_draft(household_id)

    return render_template(
        "main/household_edit.html",
        household=household,
        members=members,
        gift_records=gift_records,
        new_gift_record=new_gift_record,
        new_member=build_new_member_draft(household_id),
        relation_category_options=list_enabled_options("relation_category"),
        relation_detail_options=list_enabled_options("relation_detail"),
        tag_options=list_enabled_options("tag"),
        gift_method_options=list_enabled_options("gift_method"),
        gift_scene_options=list_enabled_options("gift_scene"),
        gift_record_type_options=GIFT_RECORD_TYPE_OPTIONS,
        gift_record_type_labels=GIFT_RECORD_TYPE_LABELS,
        gift_record_type_label=gift_record_type_label,
        gender_options=GENDER_OPTIONS,
        gender_labels=GENDER_LABELS,
        age_group_options=AGE_GROUP_OPTIONS,
        age_group_labels=AGE_GROUP_LABELS,
        relation_to_head_options=RELATION_TO_HEAD_OPTIONS,
    )


@main_bp.post("/households/<int:household_id>")
@role_required("admin", "editor")
def update_household(household_id: int):
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要编辑的户信息。", "error")
        return redirect(url_for("main.index"))

    redirect_target = url_for("main.edit_household", household_id=household_id)
    submitted_version = request.form.get("version", "").strip()
    try:
        version = int(submitted_version)
    except ValueError:
        flash("表单版本无效，请重新打开该户信息后再试。", "error")
        return redirect(redirect_target)

    if version != household.version:
        flash("该户信息已被其他人更新，请刷新后重新确认再保存。", "warning")
        return redirect(redirect_target)

    relation_category_options = list_enabled_options("relation_category")
    tag_options = list_enabled_options("tag")
    gift_method_options = list_enabled_options("gift_method")
    gift_scene_options = list_enabled_options("gift_scene")
    payload, errors = parse_admin_form(
        dict(request.form),
        raw_tag_option_ids=request.form.getlist("tag_option_ids_json"),
        valid_relation_category_ids={option.id for option in relation_category_options},
        relation_detail_parent_map={},
        valid_tag_ids={option.id for option in tag_options},
        valid_method_ids={option.id for option in gift_method_options},
        valid_scene_ids={option.id for option in gift_scene_options},
    )
    if errors:
        for error in errors:
            flash(error, "error")
        return redirect(redirect_target)

    new_relation_category_label, relation_category_errors = parse_new_relation_category_label(
        request.form.get("new_relation_category_label", ""),
    )
    if relation_category_errors:
        for error in relation_category_errors:
            flash(error, "error")
        return redirect(redirect_target)

    new_tag_labels, tag_label_errors = parse_new_tag_labels(request.form.get("new_tag_labels", ""))
    if tag_label_errors:
        for error in tag_label_errors:
            flash(error, "error")
        return redirect(redirect_target)

    if household_has_active_gift_records(household_id):
        payload.pop("total_gift_amount", None)
        payload.pop("gift_method_option_id", None)
        payload.pop("gift_scene_option_id", None)

    head_name = str(payload["head_name"])
    if is_head_name_taken(head_name, excluding_household_id=household_id):
        flash("户主姓名已存在，请修改后重试。", "error")
        return redirect(redirect_target)

    household_code = payload.get("household_code")
    normalized_household_code = str(household_code) if household_code else None
    if normalized_household_code and is_household_code_taken(normalized_household_code, excluding_household_id=household_id):
        flash("户编码已存在，请换一个新的户编码。", "error")
        return redirect(redirect_target)

    before_snapshot = serialize_admin_edit_snapshot(household)
    current_account = g.current_account
    created_relation_category = ensure_relation_category_option(
        new_relation_category_label,
        actor_id=current_account.id if isinstance(current_account, Account) else None,
    )
    if created_relation_category is not None:
        payload["relation_category_option_id"] = created_relation_category.id
        payload["relation_detail_option_id"] = None

    created_tag_options = ensure_tag_options(
        new_tag_labels,
        actor_id=current_account.id if isinstance(current_account, Account) else None,
    )
    if created_tag_options:
        existing_ids = set(payload["tag_option_ids_json"]) if isinstance(payload["tag_option_ids_json"], list) else set()
        payload["tag_option_ids_json"] = sorted(existing_ids | {option.id for option in created_tag_options})

    for field_name, value in payload.items():
        setattr(household, field_name, value)

    if isinstance(current_account, Account):
        household.updated_by = current_account.id

    if household_has_active_gift_records(household_id):
        recalculate_household_gift_summary(household)

    if serialize_admin_edit_snapshot(household) == before_snapshot:
        flash("没有检测到需要保存的变化。", "warning")
        db.session.rollback()
        return redirect(redirect_target)

    household.version += 1
    after_snapshot = serialize_admin_edit_snapshot(household)
    write_audit_log(
        action_type="update_household",
        target_type="household",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=household.id,
        target_display_name=household.head_name,
        before_data=before_snapshot,
        after_data=after_snapshot,
        commit=False,
    )
    db.session.commit()
    flash(f"已保存 {household.head_name} 的户级修改。", "success")
    return redirect(redirect_target)


@main_bp.post("/households/<int:household_id>/delete")
@role_required("admin", "editor")
def delete_household(household_id: int):
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要删除的户信息。", "error")
        return redirect(url_for("main.index"))

    redirect_target = _admin_index_redirect_from_values(request.form)
    confirm = request.form.get("confirm", "").strip()
    if confirm != "yes":
        flash("请确认删除户操作。", "warning")
        return redirect(redirect_target)

    before_snapshot = serialize_admin_edit_snapshot(household)
    current_account = g.current_account
    if isinstance(current_account, Account):
        household.updated_by = current_account.id

    household.deleted_at = datetime.now(UTC).replace(tzinfo=None)
    household.version += 1

    write_audit_log(
        action_type="delete_household",
        target_type="household",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=household.id,
        target_display_name=household.head_name,
        before_data=before_snapshot,
        after_data=serialize_admin_edit_snapshot(household),
        commit=False,
    )
    db.session.commit()
    flash(f"已删除户 {household.head_name}。", "success")
    return redirect(redirect_target)


@main_bp.post("/households/<int:household_id>/gift-records")
@role_required("admin", "editor")
def create_gift_record(household_id: int):
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要补录礼金明细的户信息。", "error")
        return redirect(url_for("main.index"))

    redirect_target = url_for("main.edit_household", household_id=household_id)
    gift_method_options = list_enabled_options("gift_method")
    gift_scene_options = list_enabled_options("gift_scene")
    payload, errors = parse_gift_record_form(
        dict(request.form),
        household_id=household_id,
        valid_method_ids={option.id for option in gift_method_options},
        valid_scene_ids={option.id for option in gift_scene_options},
    )
    if errors:
        for error in errors:
            flash(error, "error")
        return redirect(redirect_target)

    record = build_new_gift_record_draft(household_id)
    for field_name, value in payload.items():
        setattr(record, field_name, value)

    current_account = g.current_account
    if isinstance(current_account, Account):
        record.created_by = current_account.id
        record.updated_by = current_account.id
        household.updated_by = current_account.id

    db.session.add(record)
    db.session.flush()
    recalculate_household_gift_summary(household)
    household.version += 1
    write_audit_log(
        action_type="create_gift_record",
        target_type="gift_record",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=record.id,
        target_display_name=f"{household.head_name} - {gift_record_type_label(record.record_type)}",
        after_data=serialize_gift_record_snapshot(record),
        commit=False,
    )
    db.session.commit()
    flash("已新增礼金明细。", "success")
    return redirect(redirect_target)


@main_bp.post("/households/<int:household_id>/gift-records/<int:record_id>")
@role_required("admin", "editor")
def update_gift_record(household_id: int, record_id: int):
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要编辑礼金明细的户信息。", "error")
        return redirect(url_for("main.index"))

    record = get_gift_record_or_none(record_id)
    if record is None or record.household_id != household_id:
        flash("未找到要编辑的礼金明细。", "error")
        return redirect(url_for("main.edit_household", household_id=household_id))

    redirect_target = url_for("main.edit_household", household_id=household_id)
    gift_method_options = list_enabled_options("gift_method")
    gift_scene_options = list_enabled_options("gift_scene")
    payload, errors = parse_gift_record_form(
        dict(request.form),
        household_id=household_id,
        valid_method_ids={option.id for option in gift_method_options},
        valid_scene_ids={option.id for option in gift_scene_options},
    )
    if errors:
        for error in errors:
            flash(error, "error")
        return redirect(redirect_target)

    before_snapshot = serialize_gift_record_snapshot(record)
    for field_name, value in payload.items():
        setattr(record, field_name, value)

    current_account = g.current_account
    if isinstance(current_account, Account):
        record.updated_by = current_account.id
        household.updated_by = current_account.id

    after_snapshot = serialize_gift_record_snapshot(record)
    if after_snapshot == before_snapshot:
        flash("没有检测到需要保存的礼金明细变更。", "warning")
        db.session.rollback()
        return redirect(redirect_target)

    recalculate_household_gift_summary(household)
    household.version += 1
    write_audit_log(
        action_type="update_gift_record",
        target_type="gift_record",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=record.id,
        target_display_name=f"{household.head_name} - {gift_record_type_label(record.record_type)}",
        before_data=before_snapshot,
        after_data=after_snapshot,
        commit=False,
    )
    db.session.commit()
    flash("已更新礼金明细。", "success")
    return redirect(redirect_target)


@main_bp.post("/households/<int:household_id>/gift-records/<int:record_id>/delete")
@role_required("admin", "editor")
def delete_gift_record(household_id: int, record_id: int):
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要删除礼金明细的户信息。", "error")
        return redirect(url_for("main.index"))

    record = get_gift_record_or_none(record_id)
    if record is None or record.household_id != household_id:
        flash("未找到要删除的礼金明细。", "error")
        return redirect(url_for("main.edit_household", household_id=household_id))

    redirect_target = url_for("main.edit_household", household_id=household_id)
    confirm = request.form.get("confirm", "").strip()
    if confirm != "yes":
        flash("请确认删除礼金明细操作。", "warning")
        return redirect(redirect_target)

    before_snapshot = serialize_gift_record_snapshot(record)
    current_account = g.current_account
    if isinstance(current_account, Account):
        record.updated_by = current_account.id
        household.updated_by = current_account.id

    record.deleted_at = datetime.now(UTC).replace(tzinfo=None)
    recalculate_household_gift_summary(household)
    household.version += 1
    write_audit_log(
        action_type="delete_gift_record",
        target_type="gift_record",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=record.id,
        target_display_name=f"{household.head_name} - {gift_record_type_label(record.record_type)}",
        before_data=before_snapshot,
        after_data=serialize_gift_record_snapshot(record),
        commit=False,
    )
    db.session.commit()
    flash("已删除礼金明细。", "success")
    return redirect(redirect_target)


@main_bp.post("/households/<int:household_id>/members")
@role_required("admin", "editor")
def create_member(household_id: int):
    """创建新成员。"""
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要添加成员的户信息。", "error")
        return redirect(url_for("main.index"))

    payload, errors = parse_member_form(dict(request.form), household_id=household_id)
    if errors:
        for error in errors:
            flash(error, "error")
        return redirect(url_for("main.edit_household", household_id=household_id))

    member = build_new_member_draft(household_id)
    for field_name, value in payload.items():
        setattr(member, field_name, value)

    current_account = g.current_account
    if isinstance(current_account, Account):
        member.created_by = current_account.id
        member.updated_by = current_account.id

    db.session.add(member)
    db.session.flush()

    write_audit_log(
        action_type="create_household_member",
        target_type="household_member",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=member.id,
        target_display_name=f"{household.head_name} - {member.name}",
        after_data=serialize_member_snapshot(member),
        commit=False,
    )
    db.session.commit()

    flash(f"已添加成员 {member.name}。", "success")
    return redirect(url_for("main.edit_household", household_id=household_id))


@main_bp.post("/households/<int:household_id>/members/<int:member_id>")
@role_required("admin", "editor")
def update_member(household_id: int, member_id: int):
    """更新成员信息。"""
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要编辑成员的户信息。", "error")
        return redirect(url_for("main.index"))

    member = get_member_or_none(member_id)
    if member is None or member.household_id != household_id:
        flash("未找到要编辑的成员信息。", "error")
        return redirect(url_for("main.edit_household", household_id=household_id))

    redirect_target = url_for("main.edit_household", household_id=household_id)
    payload, errors = parse_member_form(dict(request.form), household_id=household_id)
    if errors:
        for error in errors:
            flash(error, "error")
        return redirect(redirect_target)

    before_snapshot = serialize_member_snapshot(member)
    for field_name, value in payload.items():
        setattr(member, field_name, value)

    current_account = g.current_account
    if isinstance(current_account, Account):
        member.updated_by = current_account.id

    after_snapshot = serialize_member_snapshot(member)
    if after_snapshot == before_snapshot:
        flash("没有检测到需要保存的成员变化。", "warning")
        db.session.rollback()
        return redirect(redirect_target)

    write_audit_log(
        action_type="update_household_member",
        target_type="household_member",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=member.id,
        target_display_name=f"{household.head_name} - {member.name}",
        before_data=before_snapshot,
        after_data=after_snapshot,
        commit=False,
    )
    db.session.commit()

    flash(f"已更新成员 {member.name} 的信息。", "success")
    return redirect(redirect_target)


@main_bp.post("/households/<int:household_id>/members/<int:member_id>/delete")
@role_required("admin", "editor")
def delete_member(household_id: int, member_id: int):
    """删除成员。"""
    household = get_household_or_none(household_id)
    if household is None:
        flash("未找到要删除成员的户信息。", "error")
        return redirect(url_for("main.index"))

    member = get_member_or_none(member_id)
    if member is None or member.household_id != household_id:
        flash("未找到要删除的成员信息。", "error")
        return redirect(url_for("main.edit_household", household_id=household_id))

    redirect_target = url_for("main.edit_household", household_id=household_id)

    # 确认删除
    confirm = request.form.get("confirm", "").strip()
    if confirm != "yes":
        flash("请确认删除操作。", "warning")
        return redirect(redirect_target)

    before_snapshot = serialize_member_snapshot(member)
    member_name = member.name

    current_account = g.current_account
    if isinstance(current_account, Account):
        member.updated_by = current_account.id

    db.session.delete(member)

    write_audit_log(
        action_type="delete_household_member",
        target_type="household_member",
        actor=current_account if isinstance(current_account, Account) else None,
        target_id=member_id,
        target_display_name=f"{household.head_name} - {member_name}",
        before_data=before_snapshot,
        after_data={"deleted": True},
        commit=False,
    )
    db.session.commit()

    flash(f"已删除成员 {member_name}。", "success")
    return redirect(redirect_target)