"""默认人物模板测试。"""

from collections.abc import AsyncGenerator

import pytest
from httpx import ASGITransport, AsyncClient
from sqlalchemy import func, select
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.errors import AppError
from app.db.init_data import seed_default_data
from app.db.session import AsyncSessionLocal
from app.main import app
from app.models.character import Character
from app.models.personality import PersonalityVersion
from app.models.user import User
from app.repositories import characters as character_repo
from app.repositories import personality as personality_repo
from app.repositories.json_utils import dumps
from app.modules.character import (
    MODEL_POLICY_CREATE_DEFAULTS,
    SYSTEM_TEMPLATE_OWNER_SCOPE,
    ensure_character_mutable,
)


@pytest.fixture
async def db_session() -> AsyncGenerator[AsyncSession, None]:
    async with AsyncSessionLocal() as session:
        yield session


async def _seeded_admin_scope(db: AsyncSession) -> str:
    """获取种子数据中管理员用户的 owner_scope。"""
    result = await db.execute(select(User).where(User.is_admin.is_(True)).limit(1))
    admin = result.scalar_one_or_none()
    assert admin is not None, "种子数据应已创建管理员用户"
    return admin.id


@pytest.mark.asyncio
async def test_seed_creates_system_template_and_user_copy(db_session: AsyncSession) -> None:
    db = db_session
    template = await character_repo.get_system_template_by_key(db, "default")
    assert template is not None
    assert template.is_system_template is True
    assert template.owner_scope == "system"
    assert template.template_key == "default"

    admin_scope = await _seeded_admin_scope(db)
    character = await character_repo.get_active_character(db, admin_scope)
    assert character is not None
    assert character.is_system_template is False
    assert character.source_template_id == template.id
    assert character.id != template.id


@pytest.mark.asyncio
async def test_active_character_api_returns_user_copy() -> None:
    transport = ASGITransport(app=app)
    async with AsyncSessionLocal() as session:
        admin_scope = await _seeded_admin_scope(session)
        from app.services.auth import create_access_token

        token = create_access_token(subject=admin_scope, extra={"owner_scope": admin_scope})
    async with AsyncClient(
        transport=transport,
        base_url="http://test",
        headers={"Authorization": f"Bearer {token}"},
    ) as client:
        response = await client.get("/api/v1/characters/active")

    assert response.status_code == 200
    body = response.json()
    assert body["is_system_template"] is False
    assert body["source_template_id"]
    assert not body["owner_scope"].startswith("local-user")


@pytest.mark.asyncio
async def test_personality_is_copied_from_template(db_session: AsyncSession) -> None:
    db = db_session
    template = await character_repo.get_system_template_by_key(db, "default")
    admin_scope = await _seeded_admin_scope(db)
    character = await character_repo.get_active_character(db, admin_scope)
    assert template is not None
    assert character is not None
    assert template.current_personality_version_id is not None
    assert character.current_personality_version_id is not None
    assert template.current_personality_version_id != character.current_personality_version_id

    template_personality = await personality_repo.get_personality(
        db, template.current_personality_version_id
    )
    user_personality = await personality_repo.get_personality(
        db, character.current_personality_version_id
    )
    assert template_personality is not None
    assert user_personality is not None
    assert template_personality.character_id == template.id
    assert user_personality.character_id == character.id
    assert user_personality.reason == "system_template_copy"

    from app.services.auth import create_access_token

    token = create_access_token(subject=admin_scope, extra={"owner_scope": admin_scope})
    transport = ASGITransport(app=app)
    async with AsyncClient(
        transport=transport,
        base_url="http://test",
        headers={"Authorization": f"Bearer {token}"},
    ) as client:
        response = await client.get("/api/v1/personality/current")
    assert response.status_code == 200
    assert response.json()["id"] == user_personality.id


@pytest.mark.asyncio
async def test_seed_default_data_is_idempotent(db_session: AsyncSession) -> None:
    db = db_session
    await seed_default_data(db)
    await seed_default_data(db)

    # 种子数据幂等：只应有一名管理员用户
    result = await db.execute(select(User).where(User.is_admin.is_(True)))
    admins = result.scalars().all()
    assert len(admins) == 1
    admin_scope = admins[0].id

    template_count = await db.scalar(
        select(func.count()).select_from(Character).where(Character.is_system_template.is_(True))
    )
    user_count = await db.scalar(
        select(func.count())
        .select_from(Character)
        .where(
            Character.owner_scope == admin_scope,
            Character.is_system_template.is_(False),
        )
    )
    personality_count = await db.scalar(select(func.count()).select_from(PersonalityVersion))

    assert template_count == 5
    # is_default=true 模板只有一个（default），所以用户角色数为 1
    assert user_count == 1
    # 人格版本：每个模板 + 每个角色的复制
    assert personality_count >= 7


@pytest.mark.asyncio
async def test_seed_does_not_overwrite_existing_user_character(db_session: AsyncSession) -> None:
    db = db_session
    admin_scope = await _seeded_admin_scope(db)
    character = await character_repo.get_active_character(db, admin_scope)
    assert character is not None
    character.profile_json = dumps({"background": "用户已自定义"})
    character.model_policy_json = dumps({"default_chat_model_hint": "custom-model"})
    await db.commit()

    await seed_default_data(db)
    await db.refresh(character)

    assert character.profile_json == dumps({"background": "用户已自定义"})
    assert character.model_policy_json == dumps({"default_chat_model_hint": "custom-model"})


@pytest.mark.asyncio
async def test_system_template_is_not_mutable(db_session: AsyncSession) -> None:
    db = db_session
    template = await character_repo.get_system_template_by_key(db, "default")
    admin_scope = await _seeded_admin_scope(db)
    character = await character_repo.get_active_character(db, admin_scope)
    assert template is not None
    assert character is not None

    with pytest.raises(ValueError, match="系统人物模板不可修改"):
        ensure_character_mutable(template.is_system_template)

    ensure_character_mutable(character.is_system_template)