"""验证 _helpers.get_user_plan 档位归一化逻辑（#1894 旧档位兼容）"""

from __future__ import annotations

from unittest import mock

import pytest
from app.api.routes import _helpers


class _FakeUser:
    def __init__(self, plan):
        self.subscription_plan = plan


class _FakeUserNoPlan:
    pass


class _FakeRepo:
    def __init__(self, user=None):
        self._user = user

    def find_by_id(self, uid):
        return self._user


def test_user_not_found_returns_free():
    """用户不存在时返回 free（覆盖 _helpers.py 第 41 行 user is None 分支）"""
    repo = _FakeRepo(user=None)
    assert _helpers.get_user_plan("u-missing", repo) == "free"


def test_user_plan_none_returns_free():
    """用户 plan 属性为 None 时返回 free"""
    repo = _FakeRepo(user=_FakeUser(None))
    assert _helpers.get_user_plan("u1", repo) == "free"


@pytest.mark.parametrize(
    "legacy,expected",
    [
        ("standard", "monthly"),
        ("basic", "monthly"),
        ("pro", "quarterly"),
        ("premium", "quarterly"),
        ("enterprise", "quarterly"),
    ],
)
def test_legacy_plans_normalized(legacy, expected):
    """旧档位值正确归一化到新体系"""
    repo = _FakeRepo(user=_FakeUser(legacy))
    assert _helpers.get_user_plan("u1", repo) == expected


def test_unknown_plan_returns_free():
    """未知 plan 值（非新旧任一档位）→ 回落到 free（覆盖第 47 行）"""
    repo = _FakeRepo(user=_FakeUser("totally_unknown_plan_xyz"))
    assert _helpers.get_user_plan("u1", repo) == "free"


def test_user_without_subscription_plan_attr_returns_free():
    """user 对象没有 subscription_plan 属性时返回 free（getattr 默认值分支）"""
    repo = _FakeRepo(user=_FakeUserNoPlan())
    assert _helpers.get_user_plan("u1", repo) == "free"


@pytest.mark.parametrize("plan", ["free", "monthly", "quarterly", "yearly"])
def test_valid_new_plans_passthrough(plan):
    """新档位直接透传"""
    repo = _FakeRepo(user=_FakeUser(plan))
    assert _helpers.get_user_plan("u1", repo) == plan