from __future__ import annotations

import os
from types import SimpleNamespace

import pytest
import pytest_asyncio
from fastapi import FastAPI
from httpx import ASGITransport, AsyncClient
from sqlalchemy import JSON, select
from sqlalchemy.ext.asyncio import async_sessionmaker, create_async_engine

os.environ.setdefault("DATABASE_URL", "postgresql+asyncpg://tester:tester@localhost:5432/pmflow_test")

from app.api import account_settings_api  # noqa: E402
from app.core.database import get_db  # noqa: E402
from app.dependencies.auth import get_current_user  # noqa: E402
from app.models.base import Base  # noqa: E402
from app.models.integration import Integration  # noqa: E402
from app.services.account_settings_service import INTEGRATION_TYPE  # noqa: E402


def _use_sqlite_json_types(*tables) -> None:
    for table in tables:
        for column in table.columns:
            if column.type.__class__.__name__ in {"JSONB", "ARRAY", "Vector"}:
                column.type = JSON()


@pytest_asyncio.fixture
async def db_session():
    engine = create_async_engine("sqlite+aiosqlite:///:memory:")
    tables = [Integration.__table__]
    _use_sqlite_json_types(*tables)
    async with engine.begin() as conn:
        await conn.run_sync(lambda sync_conn: Base.metadata.create_all(sync_conn, tables=tables))
    maker = async_sessionmaker(engine, expire_on_commit=False)
    async with maker() as session:
        yield session
    await engine.dispose()


def _current_user(*, user_id: int = 7, tenant_id: int = 1):
    return SimpleNamespace(
        id=user_id,
        tenant_id=tenant_id,
        role="MEMBER",
        username=f"tester-{tenant_id}-{user_id}",
        email=f"tester-{tenant_id}-{user_id}@example.com",
        name="陈雨",
    )


def _build_app(db_session, current_user) -> FastAPI:
    app = FastAPI()
    app.include_router(account_settings_api.router)

    async def _fake_get_db():
        yield db_session

    app.dependency_overrides[get_db] = _fake_get_db
    app.dependency_overrides[get_current_user] = lambda: current_user
    return app


def _settings_payload(**overrides):
    payload = {
        "profile": {
            "displayName": "陈雨",
            "roleTitle": "独立开发者",
            "email": "yu@example.com",
            "defaultLanguage": "en-US",
            "avatarPreset": "default-avatar-female-02",
        },
        "aiPreferences": {
            "answerDepth": "deep",
            "evidenceDisplay": "full",
        },
        "notifications": {
            "pendingConfirmation": {"enabled": True, "desktop": True, "emailDigest": False},
            "executionWriteback": {"enabled": True, "desktop": False, "emailDigest": False},
            "releaseGate": {"enabled": True, "desktop": True, "emailDigest": True},
            "failureAlert": {"enabled": False, "desktop": False, "emailDigest": False},
        },
    }
    payload.update(overrides)
    return payload


@pytest.mark.asyncio
async def test_get_account_settings_returns_defaults_from_current_user(db_session) -> None:
    app = _build_app(db_session, _current_user())

    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as client:
        response = await client.get("/account-settings/me")

    assert response.status_code == 200
    body = response.json()
    assert body["code"] == 0
    assert body["data"]["profile"]["displayName"] == "陈雨"
    assert body["data"]["profile"]["defaultLanguage"] == "zh-CN"
    assert body["data"]["profile"]["avatarPreset"] == "default-avatar-male-01"
    assert body["data"]["aiPreferences"]["answerDepth"] == "balanced"
    assert body["data"]["notifications"]["pendingConfirmation"]["enabled"] is True
    assert body["data"]["saveScope"] == "account"


@pytest.mark.asyncio
async def test_put_account_settings_persists_user_preferences(db_session) -> None:
    app = _build_app(db_session, _current_user())

    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as client:
        update = await client.put("/account-settings/me", json=_settings_payload())
        restored = await client.get("/account-settings/me")

    assert update.status_code == 200
    assert update.json()["data"]["saveScope"] == "account"
    assert restored.status_code == 200
    assert restored.json()["data"]["profile"]["defaultLanguage"] == "en-US"
    assert restored.json()["data"]["profile"]["avatarPreset"] == "default-avatar-female-02"
    assert restored.json()["data"]["aiPreferences"]["answerDepth"] == "deep"
    assert restored.json()["data"]["aiPreferences"]["evidenceDisplay"] == "full"
    assert restored.json()["data"]["notifications"]["failureAlert"]["enabled"] is False

    row = (
        await db_session.execute(
            select(Integration).where(
                Integration.tenant_id == 1,
                Integration.type == INTEGRATION_TYPE,
            )
        )
    ).scalar_one()
    assert row.config["users"]["7"]["profile"]["displayName"] == "陈雨"
    assert row.config["users"]["7"]["profile"]["avatarPreset"] == "default-avatar-female-02"


@pytest.mark.asyncio
async def test_account_settings_are_user_scoped(db_session) -> None:
    user7_app = _build_app(db_session, _current_user(user_id=7))
    user8_app = _build_app(db_session, _current_user(user_id=8))

    async with AsyncClient(transport=ASGITransport(app=user7_app), base_url="http://test") as client:
        update = await client.put("/account-settings/me", json=_settings_payload())

    async with AsyncClient(transport=ASGITransport(app=user8_app), base_url="http://test") as client:
        restored = await client.get("/account-settings/me")

    assert update.status_code == 200
    assert restored.status_code == 200
    assert restored.json()["data"]["profile"]["defaultLanguage"] == "zh-CN"
    assert restored.json()["data"]["aiPreferences"]["answerDepth"] == "balanced"


@pytest.mark.asyncio
async def test_account_settings_reject_invalid_notification_key(db_session) -> None:
    app = _build_app(db_session, _current_user())
    payload = _settings_payload(notifications={"pendingConfirmation": {"enabled": True, "desktop": True, "emailDigest": False}})

    async with AsyncClient(transport=ASGITransport(app=app), base_url="http://test") as client:
        response = await client.put("/account-settings/me", json=payload)

    assert response.status_code == 422