from __future__ import annotations

import pytest
from sqlalchemy import create_engine, func, select
from sqlalchemy.orm import Session, sessionmaker
from sqlalchemy.pool import StaticPool

from app.core.security import verify_password
from app.db.base import Base
from app.models.employee import Employee
from app.models.employee_change_log import EmployeeChangeLog
from app.models.organization import OrganizationUnit
from app.models.role import Role
from app.schemas.employee import EmployeeUpdate
from app.services.employee import EmployeeService


def build_session() -> Session:
    engine = create_engine(
        "sqlite+pysqlite:///:memory:",
        connect_args={"check_same_thread": False},
        poolclass=StaticPool,
    )
    Base.metadata.create_all(bind=engine)
    session_factory = sessionmaker(bind=engine, autoflush=False, autocommit=False)
    return session_factory()


def test_employee_directory_seeds_rich_employee_data() -> None:
    with build_session() as db:
        service = EmployeeService(db)

        employees = service.list_employees()
        meta = service.get_employee_meta()

        assert len(employees) == 30
        assert meta.totalEmployees == 30
        assert any(item.status == "试用中" for item in employees)
        assert any(item.status == "停用" for item in employees)
        assert any("审批负责人" in item.roles for item in employees)
        assert any(item.permissions for item in employees)
        assert any(item.history for item in employees)

        role_count = db.scalar(select(func.count()).select_from(Role))
        org_count = db.scalar(select(func.count()).select_from(OrganizationUnit))
        employee_count = db.scalar(select(func.count()).select_from(Employee))
        history_count = db.scalar(select(func.count()).select_from(EmployeeChangeLog))

        assert role_count == 6
        assert org_count == 10
        assert employee_count == 30
        assert history_count and history_count >= 30


def test_employee_detail_contains_department_and_roles() -> None:
    with build_session() as db:
        service = EmployeeService(db)
        employee = service.list_employees()[0]
        detail = service.get_employee(employee.id)

        assert detail is not None
        assert detail.department
        assert detail.manager
        assert detail.organization is not None
        assert detail.roles


def test_update_employee_persists_changes_and_hashes_password() -> None:
    with build_session() as db:
        service = EmployeeService(db)
        employee = service.list_employees()[0]

        updated = service.update_employee(
            employee.id,
            EmployeeUpdate(
                name="测试员工A",
                phone="13900001111",
                location="深圳南山",
                position="高级财务分析师",
                grade="P6",
                finance_owner_name="共享财务中心",
                cost_center="CC-TEST-01",
                role_codes=["finance", "user"],
                password="12345",
            ),
        )

        persisted = db.get(Employee, employee.id)

        assert updated.name == "测试员工A"
        assert updated.phone == "13900001111"
        assert updated.location == "深圳南山"
        assert updated.position == "高级财务分析师"
        assert updated.grade == "P6"
        assert updated.financeOwner == "共享财务中心"
        assert updated.costCenter == "CC-TEST-01"
        assert updated.roleCodes == ["finance", "user"]
        assert persisted is not None
        assert persisted.password_hash is not None
        assert verify_password("12345", persisted.password_hash)
        assert any("更新员工信息" in item.action for item in updated.history)
        assert any("重置员工登录密码" == item.action for item in updated.history)


def test_disable_employee_marks_status_and_logs_change() -> None:
    with build_session() as db:
        service = EmployeeService(db)
        employee = next(item for item in service.list_employees() if item.status != "停用")

        updated = service.disable_employee(employee.id)

        persisted = db.get(Employee, employee.id)

        assert updated.status == "停用"
        assert updated.statusTone == "neutral"
        assert persisted is not None
        assert persisted.employment_status == "停用"
        assert any(item.action == "停用员工账号" for item in updated.history)


def test_update_employee_rejects_invalid_date_format() -> None:
    with build_session() as db:
        service = EmployeeService(db)
        employee = service.list_employees()[0]

        with pytest.raises(ValueError, match="出生日期格式必须为 YYYY-MM-DD。"):
            service.update_employee(employee.id, EmployeeUpdate(birth_date="2024/01/01"))