"""main 集成冒烟（B7）：路由挂载 / trace 中间件 / lifespan 启动期校验 / 统一错误体。

main app 全路由经 TestClient 走真实 lifespan（dev 环境）；仓储 monkeypatch
注入 sqlite（audit_log 供 401 留痕）；Redis 网关注入 fake（不依赖本机 Redis）。
全链路 trace 一致性与集成测试归 B8 conftest，此处只验中间件行为本身。
"""

import re

import pytest
from fastapi.testclient import TestClient
from sqlalchemy import text

from _ddl import create_sqlite_engine

from app.config.settings import settings
from app.main import app
from app.repository.risk_repository import RiskRepository
from app.service.risk import redis_gateway

TRACE_HEADER_PATTERN = r"^trc-[0-9a-f]{16}$"


class FakeGateway:
    def __init__(self):
        self.messages = []
        self.deletes = []

    def publish(self, channel, payload):
        self.messages.append((channel, payload))

    def delete(self, *keys):
        self.deletes.append(keys)


@pytest.fixture()
def client(monkeypatch):
    engine = create_sqlite_engine()  # DDL 单一事实源（B4 评审 P3-12）
    repo = RiskRepository(engine=engine)
    from app.api import deps as deps_mod
    from app.api import risk as risk_api
    from app.api import simulate as simulate_mod

    monkeypatch.setattr(risk_api, "_repo", lambda: repo)
    monkeypatch.setattr(simulate_mod, "_repo", lambda: repo)
    monkeypatch.setattr(deps_mod, "RiskRepository", lambda: repo)
    with TestClient(app) as c:  # lifespan：dev 放行；Redis 惰性连接不触网
        monkeypatch.setattr(redis_gateway, "_gateway", FakeGateway())
        yield c
    engine.dispose()


def test_health(client):
    r = client.get("/health")
    assert r.status_code == 200 and r.json()["status"] == "ok"


def test_all_routers_mounted(client):
    paths = client.get("/openapi.json").json()["paths"]
    assert set(paths) == {
        "/health",
        "/api/risk/alerts",
        "/api/risk/alerts/{alert_id}/handle",
        "/api/risk/suitability/check",
        "/api/risk/aml/scan",
        "/api/simulate/trade",
        "/api/chat",
        # 方案 B：前端拉侧三端点
        "/api/chat/sessions",
        "/api/chat/sessions/{session_id}/messages",
        "/api/chat/sessions/{session_id}/close",
        # 方案 C：SSE 流式对话
        "/api/chat/stream",
    }


def test_trace_header_generated(client):
    r = client.get("/health")
    assert r.headers["X-Trace-Id"] and re.fullmatch(TRACE_HEADER_PATTERN, r.headers["X-Trace-Id"])


def test_trace_header_passthrough(client):
    tid = "trc-abc123def45678"
    assert client.get("/health", headers={"X-Trace-Id": tid}).headers["X-Trace-Id"] == tid


def test_trace_header_invalid_regenerated(client):
    bad = "bad id!"
    tid = client.get("/health", headers={"X-Trace-Id": bad}).headers["X-Trace-Id"]
    assert tid != bad and re.fullmatch(TRACE_HEADER_PATTERN, tid)


def test_unified_error_body_401_with_trace(client):
    """手册 §10 错误体四键 + trace_id/request_id 分别对齐响应头（T-02 独立双 ID）。"""
    r = client.get("/api/risk/alerts")  # 无 debug 头
    assert r.status_code == 401
    body = r.json()
    assert body["error_code"] == "AUTH_401_MISSING_DEBUG_HEADERS"
    assert body["message"]
    assert set(body) == {"error_code", "message", "trace_id", "request_id"}
    assert body["trace_id"] == r.headers["X-Trace-Id"]
    assert body["request_id"] == r.headers["X-Request-Id"]
    assert body["trace_id"] != body["request_id"]


def test_lifespan_rejects_debug_factory_in_non_dev(monkeypatch):
    """挂账⑤（T-01 后兜底分支）：debug 工厂在场 + 非 dev → 拒绝启动。"""
    monkeypatch.setattr(settings, "app_env", "production")
    from app.api import deps as deps_mod

    monkeypatch.setattr(deps_mod, "AUTH_FACTORY_IS_DEBUG", True)
    with pytest.raises(RuntimeError, match="debug auth factory is wired"):
        with TestClient(app):
            pass


def test_lifespan_rejects_jwt_not_ready_in_non_dev(monkeypatch):
    """T-01：非 dev 且 RS256 公钥未配置（HS256 dev secret）→ 拒绝启动。"""
    monkeypatch.setattr(settings, "app_env", "production")
    monkeypatch.setattr(settings, "jwt_public_key_path", "")
    with pytest.raises(RuntimeError, match="JWT auth not ready"):
        with TestClient(app):
            pass