"""战略地图 · 收入口径（revenue caliber）状态 —— 单一事实源

口径来源：改造单 `project-20261018-cma-strategy-map-ux-revamp-fullstack` 增量 v2 §4。
截至本文件落地（2026-10-18T23:00），A1 收入口径**尚未闭合**：
  - 业务称谓「代理」≠ 会计判定（总额法 total / 净额法 net / 混合 mixed 未裁）；
  - 财务净额件与项目侧「三问」总额判定并存，正由 A1 补充单裁决。

因此本模块只声明**状态**与**业务线维度**，不存任何金额：
  - 接口照常返回 `revenue_caliber` 与分业务位（amount=None + status=pending）；
  - 前端不得写死任一方法，不得把两块合并成一个「营业收入」；
  - 口径闭合后只改本文件（status/caliber/decided_by/closed_at），并回填金额取数逻辑，
    不需要改前端。

铁律：未闭合前，页面与接口都**不得**输出单一汇总收入数。
"""

# 口径状态：unclosed / closed
STATUS = "unclosed"
CALIBER = None            # closed 时取 "total" / "net" / "mixed"
CALIBER_LABEL = "口径待定"
DECIDED_BY = None         # closed 时填裁决单/ASK 编号
CLOSED_AT = None          # ISO 时间
REASON = (
    "A1 收入口径尚未闭合（截至 2026-10-18T23:00）：业务称谓「代理」≠ 会计判定，"
    "总额法/净额法/混合法并存，待 A1 补充单裁决"
)

# 分业务（不得合并；amount 由 closed 后的取数逻辑回填）
BUSINESS_LINES = [
    {"key": "liquor_agency", "label": "酒类代销"},
    {"key": "it_self", "label": "IT自营"},
]


def snapshot(entity_id: int) -> dict:
    """返回对外口径快照（无金额；未闭合时 amount 一律 None）。"""
    return {
        "entity_id": entity_id,
        "status": STATUS,
        "caliber": CALIBER,
        "caliber_label": CALIBER_LABEL,
        "caliber_options": [
            {"key": "total", "label": "总额法"},
            {"key": "net", "label": "净额法"},
            {"key": "mixed", "label": "混合法"},
        ],
        "decided_by": DECIDED_BY,
        "closed_at": CLOSED_AT,
        "reason": REASON,
        "businesses": [
            {
                "key": b["key"],
                "label": b["label"],
                "amount": None,
                "unit": "万元",
                "status": "pending",
                "missing_reason": "收入口径未闭合" if STATUS != "closed" else None,
            }
            for b in BUSINESS_LINES
        ],
        "allow_single_total": STATUS == "closed",
        "note": "未闭合前不显示单一汇总数；分业务分列，不合并为「营业收入」",
    }