"""
岗位服务单元测试（P4 服务层改造标杆）
=============================================================

验证 P4 改造后的服务层契约：
    - 服务函数「入参数据、出参数据」
    - 业务失败通过 raise BizError 表达（不再 return R.failed）
    - 纯函数与可 mock 路径无需数据库即可测试
"""

import pytest

from src.core.exceptions import BizError
from src.modules.system.position import service as position_service


class TestBuildPageData:
    """分页数据构建（纯函数）"""

    def test_shape(self):
        data = position_service._build_page_data([], 0, 10, 1, 0)
        assert data == {'records': [], 'total': 0, 'size': 10, 'current': 1, 'pages': 0}


class TestAddPosition:
    """添加岗位"""

    def test_empty_data_raises_bizerror(self, flask_app):
        """空数据触发表单验证失败 → BizError（FlaskForm 需应用上下文）"""
        with flask_app.app_context():
            with pytest.raises(BizError):
                position_service.add_position({})


class TestUpdatePosition:
    """更新岗位"""

    def test_empty_data_raises_bizerror(self, flask_app):
        with flask_app.app_context():
            with pytest.raises(BizError):
                position_service.update_position({})


class TestUpdateStatus:
    """状态设置"""

    def test_empty_data_raises_bizerror(self, flask_app):
        with flask_app.app_context():
            with pytest.raises(BizError):
                position_service.update_position_status({})


class TestDeletePositions:
    """批量删除"""

    def test_empty_raises(self):
        """空 ID 触发 BizError"""
        with pytest.raises(BizError, match="记录ID不存在"):
            position_service.delete_positions('')

    def test_invalid_ids_raises(self):
        """非数字 ID 解析为空 → BizError"""
        with pytest.raises(BizError, match="无效的记录ID"):
            position_service.delete_positions('abc')

    def test_parse_and_delete(self, monkeypatch):
        """ID 解析后调用模型批量删除，返回删除计数"""
        from src.modules.system.position.models import Position

        captured = {}

        def fake_batch_delete(cls, ids):
            captured['ids'] = ids
            return len(ids)

        monkeypatch.setattr(Position, 'batch_delete', classmethod(fake_batch_delete))

        count = position_service.delete_positions('1,2,3')

        assert count == 3
        assert captured['ids'] == [1, 2, 3]