"""Phase 15A: Quick Wins - Model Edge Cases.

Focus: Edge cases and boundary conditions for database models
Target: Item, Link, Project, Agent, Event models
Coverage Goal: Push model coverage to 100%
"""

import uuid

from tracertm.models.agent import Agent
from tracertm.models.agent_event import AgentEvent
from tracertm.models.agent_lock import AgentLock
from tracertm.models.event import Event
from tracertm.models.item import Item
from tracertm.models.link import Link
from tracertm.models.project import Project


class TestItemModelEdgeCases:
    """Edge cases for Item model."""

    def test_item_with_empty_strings(self) -> None:
        """Test item creation with empty strings."""
        item = Item(project_id="", title="", view="FEATURE", item_type="feature")
        assert item.project_id == ""
        assert item.title == ""

    def test_item_with_none_optional_fields(self) -> None:
        """Test item with all optional fields as None."""
        item = Item(
            project_id="proj-1",
            title="Test",
            view="FEATURE",
            item_type="feature",
            description=None,
            status=None,
            parent_id=None,
            item_metadata=None,
        )
        assert item.description is None
        assert item.status is None
        assert item.parent_id is None

    def test_item_with_special_characters_in_title(self) -> None:
        """Test item with special characters in title."""
        item = Item(project_id="proj-1", title="Test @#$%^&*() Title \u2713", view="FEATURE", item_type="feature")
        assert "@#$%^&*()" in item.title
        assert "\u2713" in item.title

    def test_item_with_very_long_title(self) -> None:
        """Test item with very long title (boundary test)."""
        long_title = "A" * 10000
        item = Item(project_id="proj-1", title=long_title, view="FEATURE", item_type="feature")
        assert len(item.title) == 10000

    def test_item_with_very_long_description(self) -> None:
        """Test item with very long description."""
        long_desc = "B" * 50000
        item = Item(project_id="proj-1", title="Test", description=long_desc, view="FEATURE", item_type="feature")
        assert item.description is not None
        assert len(item.description) == 50000

    def test_item_with_complex_metadata(self) -> None:
        """Test item with complex nested metadata."""
        metadata = {
            "tags": ["urgent", "bug", "frontend"],
            "assignees": ["user1", "user2"],
            "custom_fields": {"priority": 1, "estimated_hours": 8.5, "nested": {"deeply": {"nested": "value"}}},
            "links": ["http://example.com"],
        }
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature", item_metadata=metadata)
        assert item.item_metadata == metadata

    def test_item_with_numeric_strings(self) -> None:
        """Test item with numeric string values."""
        item = Item(project_id="12345", title="67890", view="FEATURE", item_type="feature", parent_id="11111")
        assert item.project_id == "12345"
        assert item.parent_id == "11111"

    def test_item_unicode_in_description(self) -> None:
        """Test item with unicode characters in description."""
        item = Item(
            project_id="proj-1",
            title="Test",
            description="Unicode test: \u00e9\u00e8\u00ea \u4e2d\u6587 \u0639\u0631\u0628\u064a",
            view="FEATURE",
            item_type="feature",
        )
        assert item.description is not None
        assert "\u00e9" in item.description
        assert "\u4e2d\u6587" in item.description

    def test_item_metadata_empty_dict(self) -> None:
        """Test item with explicitly empty metadata dict."""
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature", item_metadata={})
        assert item.item_metadata == {}

    def test_item_all_views(self) -> None:
        """Test item creation with all possible views."""
        views = ["FEATURE", "REQUIREMENT", "TEST", "DEFECT", "TASK"]
        for view in views:
            item = Item(project_id="proj-1", title=f"Test {view}", view=view, item_type="feature")
            assert item.view == view

    def test_item_all_statuses(self) -> None:
        """Test item with various status values."""
        statuses = ["todo", "in_progress", "done", "blocked", "review"]
        for status in statuses:
            item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature", status=status)
            assert item.status == status

    def test_item_version_zero(self) -> None:
        """Test item with version zero."""
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature")
        item.version = 0
        assert item.version == 0

    def test_item_version_large_number(self) -> None:
        """Test item with large version number."""
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature")
        item.version = 99999
        assert item.version == 99999


class TestLinkModelEdgeCases:
    """Edge cases for Link model."""

    def test_link_with_empty_metadata(self) -> None:
        """Test link with empty metadata dict."""
        link = Link(
            project_id="proj-1",
            source_item_id="item-1",
            target_item_id="item-2",
            link_type="depends_on",
            metadata={},
        )
        assert link.metadata == {}

    def test_link_with_complex_metadata(self) -> None:
        """Test link with complex metadata structure."""
        metadata = {
            "weight": 5,
            "bidirectional": False,
            "properties": {"color": "red", "style": "dashed"},
            "history": [
                {"action": "created", "timestamp": "2025-01-01"},
                {"action": "updated", "timestamp": "2025-01-02"},
            ],
        }
        link = Link(
            project_id="proj-1",
            source_item_id="item-1",
            target_item_id="item-2",
            link_type="depends_on",
            metadata=metadata,
        )
        assert link.metadata == metadata

    def test_link_self_referential(self) -> None:
        """Test link where source and target are the same."""
        link = Link(project_id="proj-1", source_item_id="item-1", target_item_id="item-1", link_type="related_to")
        assert link.source_item_id == link.target_item_id

    def test_link_all_types(self) -> None:
        """Test link with various link types."""
        link_types = [
            "depends_on",
            "related_to",
            "parent_of",
            "child_of",
            "blocks",
            "implements",
            "tests",
            "derives_from",
        ]
        for link_type in link_types:
            link = Link(project_id="proj-1", source_item_id="item-1", target_item_id="item-2", link_type=link_type)
            assert link.link_type == link_type


class TestProjectModelEdgeCases:
    """Edge cases for Project model."""

    def test_project_with_empty_description(self) -> None:
        """Test project with empty description."""
        project = Project(name="Test", description="")
        assert project.description == ""

    def test_project_with_none_description(self) -> None:
        """Test project with None description."""
        project = Project(name="Test", description=None)
        assert project.description is None

    def test_project_with_special_characters_in_name(self) -> None:
        """Test project with special characters in name."""
        project = Project(name="Test @#$% Project \u2713")
        assert "@#$%" in project.name
        assert "\u2713" in project.name

    def test_project_with_very_long_name(self) -> None:
        """Test project with very long name."""
        long_name = "P" * 5000
        project = Project(name=long_name)
        assert len(project.name) == 5000

    def test_project_with_complex_metadata(self) -> None:
        """Test project with complex metadata."""
        metadata = {
            "owner": "user1",
            "team": ["user1", "user2", "user3"],
            "tags": ["backend", "api", "critical"],
            "settings": {
                "notifications": True,
                "public": False,
            },
        }
        project = Project(name="Test", project_metadata=metadata)
        assert project.project_metadata == metadata

    def test_project_with_empty_metadata(self) -> None:
        """Test project with empty metadata dict."""
        project = Project(name="Test", project_metadata={})
        assert project.project_metadata == {}

    def test_project_with_unicode_name(self) -> None:
        """Test project with unicode characters in name."""
        project = Project(name="Проект \u4e2d\u6587 عربي")
        assert "\u4e2d\u6587" in project.name


class TestAgentModelEdgeCases:
    """Edge cases for Agent model."""

    def test_agent_with_empty_name(self) -> None:
        """Test agent with empty name."""
        agent = Agent(name="", status="idle")
        assert agent.name == ""

    def test_agent_all_statuses(self) -> None:
        """Test agent with all possible statuses."""
        statuses = ["idle", "active", "busy", "offline", "error"]
        for status in statuses:
            agent = Agent(name="Agent", status=status)
            assert agent.status == status

    def test_agent_with_complex_metadata(self) -> None:
        """Test agent with complex metadata."""
        metadata = {
            "capabilities": ["read", "write", "execute"],
            "version": "1.0.0",
            "config": {"timeout": 30, "retries": 3},
        }
        agent = Agent(name="Agent", status="idle", agent_metadata=metadata)
        assert agent.agent_metadata == metadata


class TestAgentEventModelEdgeCases:
    """Edge cases for AgentEvent model."""

    def test_agent_event_minimal(self) -> None:
        """Test agent event with minimal fields."""
        event = AgentEvent(agent_id="agent-1", event_type="heartbeat", event_data={})
        assert event.agent_id == "agent-1"
        assert event.event_type == "heartbeat"

    def test_agent_event_complex_data(self) -> None:
        """Test agent event with complex event data."""
        event_data = {
            "action": "process_item",
            "item_id": "item-123",
            "duration_ms": 1500,
            "result": {"success": True, "items_processed": 5},
        }
        event = AgentEvent(agent_id="agent-1", event_type="task_completed", event_data=event_data)
        assert event.event_data == event_data


class TestAgentLockModelEdgeCases:
    """Edge cases for AgentLock model."""

    def test_agent_lock_minimal(self) -> None:
        """Test agent lock with minimal fields."""
        lock = AgentLock(project_id="proj-1", item_id="resource-1", agent_id="agent-1")
        assert lock.item_id == "resource-1"
        assert lock.agent_id == "agent-1"

    def test_agent_lock_with_long_resource_id(self) -> None:
        """Test agent lock with very long resource ID."""
        long_id = "r" * 1000
        lock = AgentLock(project_id="proj-1", item_id=long_id, agent_id="agent-1")
        assert len(str(lock.item_id)) == 1000

    def test_agent_lock_with_special_characters(self) -> None:
        """Test agent lock with special characters in IDs."""
        lock = AgentLock(project_id="proj-1", item_id="resource:123:abc", agent_id="agent-@-1")
        assert ":" in str(lock.item_id)
        assert "@" in lock.agent_id


class TestEventModelEdgeCases:
    """Edge cases for Event model."""

    def test_event_minimal(self) -> None:
        """Test event with minimal required fields."""
        event = Event(
            project_id="proj-1",
            event_type="test_event",
            entity_type="item",
            entity_id="item-1",
            data={},
            agent_id="agent-1",
        )
        assert event.project_id == "proj-1"
        assert event.data == {}

    def test_event_all_entity_types(self) -> None:
        """Test event with different entity types."""
        entity_types = ["item", "project", "link", "agent"]
        for entity_type in entity_types:
            event = Event(
                project_id="proj-1",
                event_type="test",
                entity_type=entity_type,
                entity_id="entity-1",
                data={},
                agent_id="agent-1",
            )
            assert event.entity_type == entity_type

    def test_event_complex_data(self) -> None:
        """Test event with complex nested data."""
        data = {
            "changes": [
                {"field": "title", "from": "Old", "to": "New"},
                {"field": "status", "from": "todo", "to": "done"},
            ],
            "metadata": {
                "user": "user1",
                "timestamp": 1234567890,
                "ip": "192.168.1.1",
            },
            "nested": {"deeply": {"nested": {"value": "test"}}},
        }
        event = Event(
            project_id="proj-1",
            event_type="item_updated",
            entity_type="item",
            entity_id="item-1",
            data=data,
            agent_id="agent-1",
        )
        assert event.data == data

    def test_event_empty_data(self) -> None:
        """Test event with explicitly empty data."""
        event = Event(
            project_id="proj-1",
            event_type="ping",
            entity_type="project",
            entity_id="proj-1",
            data={},
            agent_id="agent-1",
        )
        assert event.data == {}


class TestModelIntegration:
    """Integration tests for models working together."""

    def test_item_and_link_relationship(self) -> None:
        """Test creating items and links that reference them."""
        item1 = Item(project_id="proj-1", title="Item 1", view="FEATURE", item_type="feature")
        item1.id = "item-1"

        item2 = Item(project_id="proj-1", title="Item 2", view="FEATURE", item_type="feature")
        item2.id = "item-2"

        link = Link(project_id="proj-1", source_item_id=item1.id, target_item_id=item2.id, link_type="depends_on")

        assert link.source_item_id == item1.id
        assert link.target_item_id == item2.id

    def test_project_with_items(self) -> None:
        """Test project and item relationship."""
        project = Project(name="Test Project")
        project.id = "proj-1"

        item = Item(project_id=project.id, title="Test Item", view="FEATURE", item_type="feature")

        assert item.project_id == project.id

    def test_event_for_item_change(self) -> None:
        """Test creating event for item change."""
        item = Item(project_id="proj-1", title="Test Item", view="FEATURE", item_type="feature")
        item.id = "item-1"

        event = Event(
            project_id="proj-1",
            event_type="item_updated",
            entity_type="item",
            entity_id=item.id,
            data={"field": "title", "old": "Old", "new": "Test Item"},
            agent_id="agent-1",
        )

        assert event.entity_id == item.id
        assert event.entity_type == "item"

    def test_agent_event_for_agent(self) -> None:
        """Test agent event linked to agent."""
        agent_id = uuid.UUID("00000000-0000-0000-0000-000000000001")
        agent = Agent(id=agent_id, name="Test Agent", status="active")

        agent_event = AgentEvent(agent_id=agent.id, event_type="started", event_data={"status": "active"})

        assert agent_event.agent_id == agent.id

    def test_agent_lock_for_resource(self) -> None:
        """Test agent lock for specific resource."""
        agent_id = uuid.UUID("00000000-0000-0000-0000-000000000002")
        agent = Agent(id=agent_id, name="Test Agent", status="active")
        item = Item(project_id="proj-1", title="Locked Item", view="FEATURE", item_type="feature")

        lock = AgentLock(project_id="proj-1", item_id=item.id, agent_id=agent.id)

        assert lock.item_id == item.id
        assert lock.agent_id == agent.id


class TestModelBoundaryConditions:
    """Boundary condition tests for models."""

    def test_item_with_max_version(self) -> None:
        """Test item with maximum version number."""
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature")
        item.version = 2147483647  # Max 32-bit integer
        assert item.version == 2147483647

    def test_metadata_with_many_keys(self) -> None:
        """Test metadata with large number of keys."""
        metadata = {f"key_{i}": f"value_{i}" for i in range(1000)}
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature", item_metadata=metadata)
        assert len(item.item_metadata) == 1000

    def test_metadata_with_deeply_nested_structure(self) -> None:
        """Test metadata with deeply nested structure."""
        metadata = {"level1": {"level2": {"level3": {"level4": {"level5": "deep"}}}}}
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature", item_metadata=metadata)
        meta = item.item_metadata
        assert isinstance(meta, dict)
        assert meta["level1"]["level2"]["level3"]["level4"]["level5"] == "deep"

    def test_metadata_with_arrays(self) -> None:
        """Test metadata containing large arrays."""
        metadata = {"array": list(range(10000))}
        item = Item(project_id="proj-1", title="Test", view="FEATURE", item_type="feature", item_metadata=metadata)
        meta = item.item_metadata
        assert isinstance(meta, dict)
        assert len(meta["array"]) == 10000

    def test_multiple_links_same_type(self) -> None:
        """Test creating multiple links of the same type between items."""
        links = [
            Link(project_id="proj-1", source_item_id="item-1", target_item_id=f"item-{i}", link_type="depends_on")
            for i in range(2, 52)
        ]
        assert len(links) == 50
        assert all(link.link_type == "depends_on" for link in links)
