"""单元测试：前置权限检查"""

import pytest
import uuid
from sqlalchemy.ext.asyncio import AsyncSession

from app.core.project_permissions import (
    role_has_api_permission,
    get_missing_prerequisites,
)
from app.models.api_endpoint_permission import ApiEndpointPermission


@pytest.mark.asyncio
async def test_prerequisite_permission_satisfied(db_session: AsyncSession):
    """测试前置权限满足的情况"""
    study_id = uuid.uuid4()

    # 创建权限：主权限 + 前置权限都允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:create",
        allowed=True,
    )
    prereq_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=True,
    )
    db_session.add(main_perm)
    db_session.add(prereq_perm)
    await db_session.commit()

    # 验证权限（包含前置权限检查）
    result = await role_has_api_permission(
        db_session, study_id, "CRA", "subjects:create", check_prerequisites=True
    )
    assert result is True


@pytest.mark.asyncio
async def test_prerequisite_permission_missing(db_session: AsyncSession):
    """测试前置权限缺失的情况"""
    study_id = uuid.uuid4()

    # 创建权限：主权限允许，但前置权限不允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:create",
        allowed=True,
    )
    prereq_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=False,
    )
    db_session.add(main_perm)
    db_session.add(prereq_perm)
    await db_session.commit()

    # 验证权限（包含前置权限检查）
    result = await role_has_api_permission(
        db_session, study_id, "CRA", "subjects:create", check_prerequisites=True
    )
    assert result is False


@pytest.mark.asyncio
async def test_default_prerequisite_permission_satisfies_when_not_overridden(db_session: AsyncSession):
    """预设角色未配置前置权限时，应使用默认权限矩阵判断"""
    study_id = uuid.uuid4()

    # CRA 默认拥有 sites:read，因此未显式配置前置权限时仍满足前置条件。
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:create",
        allowed=True,
    )
    db_session.add(main_perm)
    await db_session.commit()

    # 验证权限（包含前置权限检查）
    result = await role_has_api_permission(
        db_session, study_id, "CRA", "subjects:create", check_prerequisites=True
    )
    assert result is True


@pytest.mark.asyncio
async def test_custom_role_prerequisite_permission_not_configured(db_session: AsyncSession):
    """自定义角色无默认前置权限时，应被前置权限拦截"""
    study_id = uuid.uuid4()

    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="DATA_MANAGER",
        endpoint_key="subjects:create",
        allowed=True,
    )
    db_session.add(main_perm)
    await db_session.commit()

    result = await role_has_api_permission(
        db_session, study_id, "DATA_MANAGER", "subjects:create", check_prerequisites=True
    )
    assert result is False


@pytest.mark.asyncio
async def test_multiple_prerequisites_all_satisfied(db_session: AsyncSession):
    """测试多个前置权限都满足的情况"""
    study_id = uuid.uuid4()

    # 创建权限：主权限 + 所有前置权限都允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="visits:create",
        allowed=True,
    )
    prereq1 = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:read",
        allowed=True,
    )
    prereq2 = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=True,
    )
    db_session.add(main_perm)
    db_session.add(prereq1)
    db_session.add(prereq2)
    await db_session.commit()

    # 验证权限
    result = await role_has_api_permission(
        db_session, study_id, "CRA", "visits:create", check_prerequisites=True
    )
    assert result is True


@pytest.mark.asyncio
async def test_multiple_prerequisites_one_missing(db_session: AsyncSession):
    """测试多个前置权限中有一个缺失的情况"""
    study_id = uuid.uuid4()

    # 创建权限：主权限允许，但其中一个前置权限不允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="visits:create",
        allowed=True,
    )
    prereq1 = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:read",
        allowed=True,
    )
    prereq2 = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=False,
    )
    db_session.add(main_perm)
    db_session.add(prereq1)
    db_session.add(prereq2)
    await db_session.commit()

    # 验证权限
    result = await role_has_api_permission(
        db_session, study_id, "CRA", "visits:create", check_prerequisites=True
    )
    assert result is False


@pytest.mark.asyncio
async def test_get_missing_prerequisites_empty(db_session: AsyncSession):
    """测试获取缺失的前置权限 - 无缺失"""
    study_id = uuid.uuid4()

    # 创建权限：所有权限都允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:create",
        allowed=True,
    )
    prereq_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=True,
    )
    db_session.add(main_perm)
    db_session.add(prereq_perm)
    await db_session.commit()

    # 获取缺失的前置权限
    missing = await get_missing_prerequisites(
        db_session, study_id, "CRA", "subjects:create"
    )
    assert missing == []


@pytest.mark.asyncio
async def test_get_missing_prerequisites_single(db_session: AsyncSession):
    """测试获取缺失的前置权限 - 单个缺失"""
    study_id = uuid.uuid4()

    # 创建权限：前置权限不允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:create",
        allowed=True,
    )
    prereq_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=False,
    )
    db_session.add(main_perm)
    db_session.add(prereq_perm)
    await db_session.commit()

    # 获取缺失的前置权限
    missing = await get_missing_prerequisites(
        db_session, study_id, "CRA", "subjects:create"
    )
    assert missing == ["sites:read"]


@pytest.mark.asyncio
async def test_get_missing_prerequisites_multiple(db_session: AsyncSession):
    """测试获取缺失的前置权限 - 多个缺失"""
    study_id = uuid.uuid4()

    # 创建权限：两个前置权限都不允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="visits:create",
        allowed=True,
    )
    prereq1 = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:read",
        allowed=False,
    )
    prereq2 = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=False,
    )
    db_session.add(main_perm)
    db_session.add(prereq1)
    db_session.add(prereq2)
    await db_session.commit()

    # 获取缺失的前置权限
    missing = await get_missing_prerequisites(
        db_session, study_id, "CRA", "visits:create"
    )
    assert set(missing) == {"subjects:read", "sites:read"}


@pytest.mark.asyncio
async def test_prerequisite_check_disabled(db_session: AsyncSession):
    """测试禁用前置权限检查"""
    study_id = uuid.uuid4()

    # 创建权限：主权限允许，前置权限不允许
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:create",
        allowed=True,
    )
    prereq_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=False,
    )
    db_session.add(main_perm)
    db_session.add(prereq_perm)
    await db_session.commit()

    # 验证权限（禁用前置权限检查）
    result = await role_has_api_permission(
        db_session, study_id, "CRA", "subjects:create", check_prerequisites=False
    )
    assert result is True


@pytest.mark.asyncio
async def test_admin_bypasses_prerequisites(db_session: AsyncSession):
    """测试ADMIN角色绕过前置权限检查"""
    study_id = uuid.uuid4()

    # 不创建任何权限

    # 验证权限（ADMIN应该总是被允许）
    result = await role_has_api_permission(
        db_session, study_id, "ADMIN", "subjects:create", check_prerequisites=True
    )
    assert result is True


@pytest.mark.asyncio
async def test_prerequisite_with_no_prerequisites_operation(db_session: AsyncSession):
    """测试没有前置权限的操作"""
    study_id = uuid.uuid4()

    # 创建权限：操作允许（没有前置权限）
    perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="sites:read",
        allowed=True,
    )
    db_session.add(perm)
    await db_session.commit()

    # 验证权限
    result = await role_has_api_permission(
        db_session, study_id, "CRA", "sites:read", check_prerequisites=True
    )
    assert result is True


@pytest.mark.asyncio
async def test_default_prerequisite_not_reported_missing_when_not_overridden(db_session: AsyncSession):
    """预设角色默认拥有前置权限时，不应报告缺失"""
    study_id = uuid.uuid4()

    # 创建权限：主权限允许，前置权限未配置
    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="CRA",
        endpoint_key="subjects:create",
        allowed=True,
    )
    db_session.add(main_perm)
    await db_session.commit()

    # 获取缺失的前置权限
    missing = await get_missing_prerequisites(
        db_session, study_id, "CRA", "subjects:create"
    )
    assert missing == []


@pytest.mark.asyncio
async def test_custom_role_prerequisite_missing_not_configured(db_session: AsyncSession):
    """自定义角色无默认前置权限时，应报告缺失"""
    study_id = uuid.uuid4()

    main_perm = ApiEndpointPermission(
        study_id=study_id,
        role="DATA_MANAGER",
        endpoint_key="subjects:create",
        allowed=True,
    )
    db_session.add(main_perm)
    await db_session.commit()

    missing = await get_missing_prerequisites(
        db_session, study_id, "DATA_MANAGER", "subjects:create"
    )
    assert "sites:read" in missing