import httpx
import pytest

from app.services.website_client import (
    WebsiteError,
    _friendly_connection_error,
    _friendly_http_error,
    normalize_groups,
)


# ——— normalize_groups ———


def test_normalize_groups_unwraps_sub2api_paginated_response():
    groups = normalize_groups({
        "code": 0,
        "message": "success",
        "data": {
            "items": [
                {"id": "codex-free", "name": "codex-free", "rate_multiplier": 1},
                {"id": "my-plus", "name": "my-plus", "rate_multiplier": "1.5"},
                {"id": "deepseek", "name": "deepseek"},
            ],
            "total": 3,
            "page": 1,
        },
    })

    assert [group["id"] for group in groups] == ["codex-free", "my-plus", "deepseek"]
    assert groups[0]["rate_multiplier"] == "1"
    assert groups[1]["rate_multiplier"] == "1.5"
    assert groups[2]["rate_multiplier"] is None


def test_normalize_groups_unwraps_wrapped_list_response():
    groups = normalize_groups({
        "code": 0,
        "message": "success",
        "data": [
            {"id": "default", "name": "Default", "rateMultiplier": "2.0"},
        ],
    })

    assert groups == [{
        "id": "default",
        "name": "Default",
        "rate_multiplier": "2",
        "raw": {"id": "default", "name": "Default", "rateMultiplier": "2.0"},
    }]


def test_normalize_groups_unwraps_groups_key_response():
    groups = normalize_groups({
        "data": {
            "groups": [
                {"group_id": "vip", "group_name": "VIP", "ratio": "0.75"},
            ],
        },
    })

    assert groups[0]["id"] == "vip"
    assert groups[0]["name"] == "VIP"
    assert groups[0]["rate_multiplier"] == "0.75"


def test_normalize_groups_keeps_string_list_compatibility():
    groups = normalize_groups(["free", "paid"])

    assert [group["id"] for group in groups] == ["free", "paid"]
    assert groups[0]["raw"] == {"id": "free", "name": "free"}


def test_normalize_groups_keeps_plain_dict_mapping_compatibility():
    groups = normalize_groups({
        "free": {"id": "free", "name": "Free", "rate_multiplier": "1.00"},
        "paid": {"id": "paid", "name": "Paid"},
    })

    assert [group["id"] for group in groups] == ["free", "paid"]
    assert groups[0]["rate_multiplier"] == "1"


# ——— _get_account_ids / account_exists ———


def test_get_account_ids_flat_list():
    from app.services.website_client import Sub2ApiWebsiteClient
    ids = Sub2ApiWebsiteClient._unwrap_list([
        {"id": 1, "name": "a"}, {"id": 2, "name": "b"},
    ])
    assert ids == [{"id": 1, "name": "a"}, {"id": 2, "name": "b"}]


def test_get_account_ids_top_level_items():
    from app.services.website_client import Sub2ApiWebsiteClient
    ids = Sub2ApiWebsiteClient._unwrap_list({"items": [
        {"id": "k1"}, {"id": "k2"},
    ]})
    assert ids == [{"id": "k1"}, {"id": "k2"}]


def test_get_account_ids_nested_data_items():
    from app.services.website_client import Sub2ApiWebsiteClient
    ids = Sub2ApiWebsiteClient._unwrap_list({"data": {"items": [
        {"id": "a1", "name": "Alpha"},
        {"id": "a2", "name": "Beta"},
    ]}})
    assert ids == [{"id": "a1", "name": "Alpha"}, {"id": "a2", "name": "Beta"}]


def test_get_account_ids_nested_data_empty():
    from app.services.website_client import Sub2ApiWebsiteClient
    ids = Sub2ApiWebsiteClient._unwrap_list({"data": {"items": []}})
    assert ids == []


def test_get_account_ids_unexpected_format():
    from app.services.website_client import Sub2ApiWebsiteClient
    ids = Sub2ApiWebsiteClient._unwrap_list({"error": "not found"})
    assert ids is None


# ——— 友好错误提示 ———

def _make_response(status_code: int, path: str = "/groups") -> httpx.Response:
    """创建模拟的 httpx.Response 用于错误测试。"""
    req = httpx.Request("GET", f"http://target.local/api/v1{path}")
    resp = httpx.Response(status_code, request=req)
    return resp


def test_friendly_http_401():
    resp = _make_response(401)
    exc = httpx.HTTPStatusError("401", request=resp.request, response=resp)
    msg = _friendly_http_error(exc)
    assert "认证失败" in msg
    assert "API Key" in msg
    assert "http://" not in msg


def test_friendly_http_403():
    resp = _make_response(403)
    exc = httpx.HTTPStatusError("403", request=resp.request, response=resp)
    msg = _friendly_http_error(exc)
    assert "权限不足" in msg


def test_friendly_http_404():
    resp = _make_response(404, path="/wrong-path")
    exc = httpx.HTTPStatusError("404", request=resp.request, response=resp)
    msg = _friendly_http_error(exc)
    assert "接口不存在" in msg
    assert "/wrong-path" in msg
    # 不包含完整 URL / MDN 链接
    assert "http://" not in msg
    assert "MDN" not in msg


def test_friendly_http_500():
    resp = _make_response(502)
    exc = httpx.HTTPStatusError("502", request=resp.request, response=resp)
    msg = _friendly_http_error(exc)
    assert "服务异常" in msg


def test_friendly_connect_error():
    exc = httpx.ConnectError("Connection refused")
    msg = _friendly_connection_error(exc)
    assert "无法连接" in msg


def test_friendly_timeout_error():
    exc = httpx.TimeoutException("Timed out")
    msg = _friendly_connection_error(exc)
    assert "请求超时" in msg


# ——— get_groups fallback（通过 mock httpx client 触发真实 _request 错误转换） ———

def _mock_httpx_request(status_code: int, path: str = "/groups"):
    """返回一个 mock 的 httpx.Client.request，直接抛 HTTPStatusError。"""
    def request(self, method, url, **kwargs):
        resp = _make_response(status_code, path=path)
        raise httpx.HTTPStatusError(f"{status_code} {path}", request=resp.request, response=resp)
    return request


def test_get_groups_401_returns_friendly_auth_error(monkeypatch):
    from app.services.website_client import Sub2ApiWebsiteClient

    monkeypatch.setattr(httpx.Client, "request", _mock_httpx_request(401))
    client = Sub2ApiWebsiteClient("http://target.local", "api/v1", "api_key", {"key": "bad"})
    with pytest.raises(WebsiteError) as excinfo:
        client.get_groups("/groups")
    msg = str(excinfo.value)
    assert "认证失败" in msg
    assert "http://" not in msg
    assert "MDN" not in msg


def test_get_groups_404_fallback_succeeds(monkeypatch):
    from app.services.website_client import Sub2ApiWebsiteClient

    call_count = 0

    def request_fallback(self, method, url, **kwargs):
        nonlocal call_count
        call_count += 1
        if call_count == 1:
            resp = _make_response(404)
            raise httpx.HTTPStatusError("404", request=resp.request, response=resp)
        req = httpx.Request("GET", url)
        return httpx.Response(200, json={"data": [{"id": "default", "name": "Default", "rate_multiplier": "1"}]}, request=req)

    monkeypatch.setattr(httpx.Client, "request", request_fallback)
    client = Sub2ApiWebsiteClient("http://target.local", "api/v1", "api_key", {"key": "ok"})
    groups = client.get_groups("/groups")
    assert len(groups) == 1
    assert groups[0]["id"] == "default"
    assert call_count == 2


def test_get_groups_all_404_no_raw_url(monkeypatch):
    from app.services.website_client import Sub2ApiWebsiteClient

    monkeypatch.setattr(httpx.Client, "request", _mock_httpx_request(404))
    client = Sub2ApiWebsiteClient("http://target.local", "api/v1", "api_key", {"key": "ok"})
    with pytest.raises(WebsiteError) as excinfo:
        client.get_groups("/groups")
    msg = str(excinfo.value)
    assert "接口不存在" in msg
    assert "http://" not in msg
    assert "MDN" not in msg