"""Project 领域模型 + UseCase 单元测试（P3-1 第30波）。"""

from __future__ import annotations

from unittest.mock import MagicMock

import pytest

from packages.application.projects import (
    CreateProjectCommand,
    CreateProjectUseCase,
    DeleteProjectUseCase,
    GetProjectUseCase,
    ListProjectsUseCase,
    ShareProjectUseCase,
    UnshareProjectUseCase,
)
from packages.domain.entities import Project

# ── Project 领域模型 ────────────────────────────────────────────────────────


class TestProjectDomain:
    """Project 领域模型单元测试。"""

    def test_create_project_basic(self):
        """创建项目基本字段正确。"""
        project = Project.create(owner_user_id="user_001", name="我的项目")

        assert project.id
        assert project.owner_user_id == "user_001"
        assert project.name == "我的项目"
        assert project.description == ""
        assert project.shared_users == []
        assert project.created_at

    def test_create_project_with_description(self):
        """创建项目带描述。"""
        project = Project.create(
            owner_user_id="user_001",
            name="测试项目",
            description="这是一个测试项目",
        )

        assert project.name == "测试项目"
        assert project.description == "这是一个测试项目"

    def test_create_project_name_stripped(self):
        """项目名称首尾空格被清理。"""
        project = Project.create(owner_user_id="user_001", name="  我的项目  ")

        assert project.name == "我的项目"

    def test_create_project_description_stripped(self):
        """项目描述首尾空格被清理。"""
        project = Project.create(
            owner_user_id="user_001",
            name="测试",
            description="  描述内容  ",
        )

        assert project.description == "描述内容"

    def test_create_project_empty_name_raises(self):
        """空项目名抛 ValueError。"""
        with pytest.raises(ValueError, match="项目名称不能为空"):
            Project.create(owner_user_id="user_001", name="")

    def test_create_project_whitespace_name_raises(self):
        """全空格项目名抛 ValueError。"""
        with pytest.raises(ValueError, match="项目名称不能为空"):
            Project.create(owner_user_id="user_001", name="   ")

    def test_is_owner_true(self):
        """is_owner 所有者返回 True。"""
        project = Project.create(owner_user_id="user_001", name="项目")

        assert project.is_owner("user_001") is True

    def test_is_owner_false(self):
        """is_owner 非所有者返回 False。"""
        project = Project.create(owner_user_id="user_001", name="项目")

        assert project.is_owner("user_002") is False

    def test_is_shared_with_true(self):
        """is_shared_with 已共享用户返回 True。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002", "user_003"]

        assert project.is_shared_with("user_002") is True
        assert project.is_shared_with("user_003") is True

    def test_is_shared_with_false(self):
        """is_shared_with 未共享用户返回 False。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002"]

        assert project.is_shared_with("user_004") is False

    def test_is_shared_with_empty_list(self):
        """共享列表为空时返回 False。"""
        project = Project.create(owner_user_id="user_001", name="项目")

        assert project.is_shared_with("user_002") is False

    def test_can_access_owner(self):
        """所有者可以访问。"""
        project = Project.create(owner_user_id="user_001", name="项目")

        assert project.can_access("user_001") is True

    def test_can_access_shared_user(self):
        """共享用户可以访问。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002"]

        assert project.can_access("user_002") is True

    def test_can_access_other_user(self):
        """其他用户不能访问。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002"]

        assert project.can_access("user_003") is False


# ── ListProjectsUseCase ──────────────────────────────────────────────────────


class TestListProjectsUseCase:
    """ListProjectsUseCase 单元测试。"""

    def test_list_projects_success(self):
        """正常列出用户项目。"""
        mock_repo = MagicMock()
        mock_repo.find_accessible_projects.return_value = [
            Project.create(owner_user_id="user_001", name="项目1"),
            Project.create(owner_user_id="user_001", name="项目2"),
        ]
        use_case = ListProjectsUseCase(mock_repo)

        result = use_case.execute("user_001")

        assert len(result) == 2
        mock_repo.find_accessible_projects.assert_called_once_with("user_001")

    def test_list_projects_empty(self):
        """用户没有项目返回空列表。"""
        mock_repo = MagicMock()
        mock_repo.find_accessible_projects.return_value = []
        use_case = ListProjectsUseCase(mock_repo)

        result = use_case.execute("user_001")

        assert result == []

    def test_list_projects_empty_user_id_raises(self):
        """空 user_id 抛 ValueError。"""
        mock_repo = MagicMock()
        use_case = ListProjectsUseCase(mock_repo)

        with pytest.raises(ValueError, match="user_id 不能为空"):
            use_case.execute("")

    def test_list_projects_whitespace_user_id_raises(self):
        """全空格 user_id 抛 ValueError。"""
        mock_repo = MagicMock()
        use_case = ListProjectsUseCase(mock_repo)

        with pytest.raises(ValueError, match="user_id 不能为空"):
            use_case.execute("   ")

    def test_list_projects_user_id_stripped(self):
        """user_id 首尾空格被清理。"""
        mock_repo = MagicMock()
        mock_repo.find_accessible_projects.return_value = []
        use_case = ListProjectsUseCase(mock_repo)

        use_case.execute("  user_001  ")

        mock_repo.find_accessible_projects.assert_called_once_with("user_001")


# ── GetProjectUseCase ───────────────────────────────────────────────────────


class TestGetProjectUseCase:
    """GetProjectUseCase 单元测试。"""

    def test_get_project_success(self):
        """正常获取项目。"""
        project = Project.create(owner_user_id="user_001", name="测试项目")
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        use_case = GetProjectUseCase(mock_repo)

        result = use_case.execute("proj_001")

        assert result == project
        mock_repo.find_by_id.assert_called_once_with("proj_001")

    def test_get_project_not_found(self):
        """项目不存在返回 None。"""
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = None
        use_case = GetProjectUseCase(mock_repo)

        result = use_case.execute("proj_001")

        assert result is None

    def test_get_project_empty_id_raises(self):
        """空 project_id 抛 ValueError。"""
        mock_repo = MagicMock()
        use_case = GetProjectUseCase(mock_repo)

        with pytest.raises(ValueError, match="project_id 不能为空"):
            use_case.execute("")

    def test_get_project_whitespace_id_raises(self):
        """全空格 project_id 抛 ValueError。"""
        mock_repo = MagicMock()
        use_case = GetProjectUseCase(mock_repo)

        with pytest.raises(ValueError, match="project_id 不能为空"):
            use_case.execute("   ")

    def test_get_project_id_stripped(self):
        """project_id 首尾空格被清理。"""
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = None
        use_case = GetProjectUseCase(mock_repo)

        use_case.execute("  proj_001  ")

        mock_repo.find_by_id.assert_called_once_with("proj_001")


# ── CreateProjectUseCase ────────────────────────────────────────────────────


class TestCreateProjectUseCase:
    """CreateProjectUseCase 单元测试。"""

    def test_create_project_success(self):
        """正常创建项目。"""
        mock_repo = MagicMock()
        mock_repo.save.side_effect = lambda p: p
        use_case = CreateProjectUseCase(mock_repo)
        command = CreateProjectCommand(name="新项目", description="项目描述")

        result = use_case.execute(command, "user_001")

        assert result.name == "新项目"
        assert result.description == "项目描述"
        assert result.owner_user_id == "user_001"
        mock_repo.save.assert_called_once()

    def test_create_project_default_description(self):
        """不传描述默认为空。"""
        mock_repo = MagicMock()
        mock_repo.save.side_effect = lambda p: p
        use_case = CreateProjectUseCase(mock_repo)
        command = CreateProjectCommand(name="新项目")

        result = use_case.execute(command, "user_001")

        assert result.description == ""

    def test_create_project_empty_name_raises(self):
        """空项目名抛 ValueError（领域层校验）。"""
        mock_repo = MagicMock()
        use_case = CreateProjectUseCase(mock_repo)
        command = CreateProjectCommand(name="")

        with pytest.raises(ValueError, match="项目名称不能为空"):
            use_case.execute(command, "user_001")

        mock_repo.save.assert_not_called()


# ── ShareProjectUseCase ─────────────────────────────────────────────────────


class TestShareProjectUseCase:
    """ShareProjectUseCase 单元测试。"""

    def test_share_project_success(self):
        """正常共享项目给用户。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        mock_repo.save.side_effect = lambda p: p
        use_case = ShareProjectUseCase(mock_repo)

        result = use_case.execute(project.id, "user_001", "user_002")

        assert "user_002" in result.shared_users
        mock_repo.save.assert_called_once()

    def test_share_project_already_shared_no_duplicate(self):
        """已共享用户再次共享不重复添加。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002"]
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        mock_repo.save.side_effect = lambda p: p
        use_case = ShareProjectUseCase(mock_repo)

        result = use_case.execute(project.id, "user_001", "user_002")

        assert result.shared_users == ["user_002"]
        mock_repo.save.assert_not_called()

    def test_share_project_not_found_raises(self):
        """项目不存在抛 ValueError。"""
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = None
        use_case = ShareProjectUseCase(mock_repo)

        with pytest.raises(ValueError, match="项目不存在"):
            use_case.execute("proj_xxx", "user_001", "user_002")

        mock_repo.save.assert_not_called()

    def test_share_project_not_owner_raises(self):
        """非所有者不能共享项目。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        use_case = ShareProjectUseCase(mock_repo)

        with pytest.raises(ValueError, match="只有项目所有者可以共享项目"):
            use_case.execute(project.id, "user_002", "user_003")

        mock_repo.save.assert_not_called()


# ── UnshareProjectUseCase ───────────────────────────────────────────────────


class TestUnshareProjectUseCase:
    """UnshareProjectUseCase 单元测试。"""

    def test_unshare_project_success(self):
        """正常取消共享。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002", "user_003"]
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        mock_repo.save.side_effect = lambda p: p
        use_case = UnshareProjectUseCase(mock_repo)

        result = use_case.execute(project.id, "user_001", "user_002")

        assert result.shared_users == ["user_003"]
        mock_repo.save.assert_called_once()

    def test_unshare_project_not_shared_noop(self):
        """未共享的用户取消共享不操作。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_003"]
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        mock_repo.save.side_effect = lambda p: p
        use_case = UnshareProjectUseCase(mock_repo)

        result = use_case.execute(project.id, "user_001", "user_002")

        assert result.shared_users == ["user_003"]
        mock_repo.save.assert_not_called()

    def test_unshare_project_not_found_raises(self):
        """项目不存在抛 ValueError。"""
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = None
        use_case = UnshareProjectUseCase(mock_repo)

        with pytest.raises(ValueError, match="项目不存在"):
            use_case.execute("proj_xxx", "user_001", "user_002")

        mock_repo.save.assert_not_called()

    def test_unshare_project_not_owner_raises(self):
        """非所有者不能取消共享。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002"]
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        use_case = UnshareProjectUseCase(mock_repo)

        with pytest.raises(ValueError, match="只有项目所有者可以取消共享"):
            use_case.execute(project.id, "user_002", "user_003")

        mock_repo.save.assert_not_called()


# ── DeleteProjectUseCase ────────────────────────────────────────────────────


class TestDeleteProjectUseCase:
    """DeleteProjectUseCase 单元测试。"""

    def test_delete_project_success(self):
        """所有者正常删除项目。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        mock_repo.delete.return_value = True
        use_case = DeleteProjectUseCase(mock_repo)

        result = use_case.execute(project.id, "user_001")

        assert result is True
        mock_repo.delete.assert_called_once_with(project.id)

    def test_delete_project_not_found(self):
        """项目不存在返回 False。"""
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = None
        use_case = DeleteProjectUseCase(mock_repo)

        result = use_case.execute("proj_xxx", "user_001")

        assert result is False
        mock_repo.delete.assert_not_called()

    def test_delete_project_not_owner_raises(self):
        """非所有者删除抛 PermissionError。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        use_case = DeleteProjectUseCase(mock_repo)

        with pytest.raises(PermissionError, match="只有项目所有者可以删除项目"):
            use_case.execute(project.id, "user_002")

        mock_repo.delete.assert_not_called()

    def test_delete_project_shared_user_raises(self):
        """共享用户不能删除项目。"""
        project = Project.create(owner_user_id="user_001", name="项目")
        project.shared_users = ["user_002"]
        mock_repo = MagicMock()
        mock_repo.find_by_id.return_value = project
        use_case = DeleteProjectUseCase(mock_repo)

        with pytest.raises(PermissionError, match="只有项目所有者可以删除项目"):
            use_case.execute(project.id, "user_002")

        mock_repo.delete.assert_not_called()