"""Tests for agent installer functionality."""

import json
import pytest
from pathlib import Path
from kaizen_agentic.installer import AgentInstaller, ProjectInitializer, InstallationConfig
from kaizen_agentic.registry import AgentRegistry


@pytest.fixture
def test_registry(tmp_path):
    """Create a test registry with sample agents."""
    # Create test agents
    agents_dir = tmp_path / "agents"
    agents_dir.mkdir()

    base_agent = """---
name: base-agent
description: Base test agent
category: testing
---

# Base Agent

This is a base agent for testing.
"""

    setup_agent = """---
name: setupRepository
description: Repository setup agent
category: infrastructure
---

# Setup Repository

Sets up repository structure.
"""

    todo_agent = """---
name: keepaTodofile
description: TODO management agent
category: project-management
---

# TODO Keeper

Manages TODO files.
"""

    changelog_agent = """---
name: keepaChangelog
description: Changelog management agent
category: project-management
---

# Changelog Keeper

Manages CHANGELOG files.
"""

    (agents_dir / "agent-base-agent.md").write_text(base_agent)
    (agents_dir / "agent-setupRepository.md").write_text(setup_agent)
    (agents_dir / "agent-keepaTodofile.md").write_text(todo_agent)
    (agents_dir / "agent-keepaChangelog.md").write_text(changelog_agent)

    return AgentRegistry(agents_dir)


def test_install_agents(test_registry, tmp_path):
    """Test installing agents into a project."""
    installer = AgentInstaller(test_registry)
    project_dir = tmp_path / "test_project"

    config = InstallationConfig(
        target_dir=project_dir,
        create_backup=False,
        update_docs=False
    )

    results = installer.install_agents(["base-agent"], config)

    assert results["base-agent"] == "INSTALLED"
    assert (project_dir / "agents" / "agent-base-agent.md").exists()


def test_install_agents_with_dependencies(test_registry, tmp_path):
    """Test installing agents with dependency resolution."""
    installer = AgentInstaller(test_registry)
    project_dir = tmp_path / "test_project"

    config = InstallationConfig(
        target_dir=project_dir,
        create_backup=False,
        update_docs=False
    )

    # Install an agent that depends on others
    results = installer.install_agents(["setupRepository"], config)

    assert "setupRepository" in results
    assert results["setupRepository"] == "INSTALLED"


def test_list_installed_agents(test_registry, tmp_path):
    """Test listing installed agents."""
    installer = AgentInstaller(test_registry)
    project_dir = tmp_path / "test_project"

    # Initially no agents
    installed = installer.list_installed_agents(project_dir)
    assert installed == []

    # Install some agents
    config = InstallationConfig(target_dir=project_dir, create_backup=False, update_docs=False)
    installer.install_agents(["base-agent", "keepaTodofile"], config)

    # Check installed agents
    installed = installer.list_installed_agents(project_dir)
    assert "base-agent" in installed
    assert "keepaTodofile" in installed
    assert len(installed) == 2


def test_update_agents(test_registry, tmp_path):
    """Test updating installed agents."""
    installer = AgentInstaller(test_registry)
    project_dir = tmp_path / "test_project"

    # Install initial agents
    config = InstallationConfig(target_dir=project_dir, create_backup=False, update_docs=False)
    installer.install_agents(["base-agent"], config)

    # Update all agents
    results = installer.update_agents(project_dir)
    assert "base-agent" in results
    assert results["base-agent"] == "INSTALLED"

    # Update specific agents
    results = installer.update_agents(project_dir, ["base-agent"])
    assert results["base-agent"] == "INSTALLED"


def test_remove_agents(test_registry, tmp_path):
    """Test removing agents from a project."""
    installer = AgentInstaller(test_registry)
    project_dir = tmp_path / "test_project"

    # Install agents first
    config = InstallationConfig(target_dir=project_dir, create_backup=False, update_docs=False)
    installer.install_agents(["base-agent", "keepaTodofile"], config)

    # Remove an agent
    results = installer.remove_agents(["base-agent"], project_dir)
    assert results["base-agent"] == "REMOVED"
    assert not (project_dir / "agents" / "agent-base-agent.md").exists()

    # Try to remove non-existent agent
    results = installer.remove_agents(["non-existent"], project_dir)
    assert results["non-existent"] == "NOT_FOUND"


def test_validate_installation(test_registry, tmp_path):
    """Test validating agent installation."""
    installer = AgentInstaller(test_registry)
    project_dir = tmp_path / "test_project"

    # Validate empty project
    errors = installer.validate_installation(project_dir)
    assert "project" in errors
    assert "No agents directory found" in errors["project"]

    # Install agents and validate
    config = InstallationConfig(target_dir=project_dir, create_backup=False, update_docs=False)
    installer.install_agents(["base-agent"], config)

    errors = installer.validate_installation(project_dir)
    assert len(errors) == 0  # Should be valid


def test_update_claude_config(test_registry, tmp_path):
    """Test updating Claude configuration."""
    installer = AgentInstaller(test_registry)
    project_dir = tmp_path / "test_project"
    claude_config = project_dir / "claude_config.json"

    config = InstallationConfig(
        target_dir=project_dir,
        claude_config_path=claude_config,
        create_backup=False,
        update_docs=False
    )

    installer.install_agents(["base-agent"], config)

    # Check that config was created and updated
    assert claude_config.exists()
    with open(claude_config) as f:
        config_data = json.load(f)

    assert "agents" in config_data
    assert "base-agent" in config_data["agents"]
    assert config_data["agents"]["base-agent"]["enabled"] is True


def test_project_initializer(test_registry, tmp_path):
    """Test project initialization."""
    initializer = ProjectInitializer(test_registry)
    project_dir = tmp_path / "new_project"

    initializer.init_project(
        project_dir,
        template="python-basic",
        project_name="new_project"
    )

    # Check that project structure was created
    assert project_dir.exists()
    assert (project_dir / "src").exists()
    assert (project_dir / "tests").exists()
    assert (project_dir / "README.md").exists()
    assert (project_dir / ".gitignore").exists()
    assert (project_dir / "pyproject.toml").exists()

    # Check that agents were installed
    assert (project_dir / "agents").exists()
    agents_installed = len([f for f in (project_dir / "agents").glob("agent-*.md")])
    assert agents_installed > 0


def test_project_initializer_custom_agents(test_registry, tmp_path):
    """Test project initialization with custom agents."""
    initializer = ProjectInitializer(test_registry)
    project_dir = tmp_path / "custom_project"

    initializer.init_project(
        project_dir,
        template="python-basic",
        agent_names=["base-agent", "keepaTodofile"],
        project_name="custom_project"
    )

    # Check that specific agents were installed
    assert (project_dir / "agents" / "agent-base-agent.md").exists()
    assert (project_dir / "agents" / "agent-keepaTodofile.md").exists()


def test_installation_config():
    """Test InstallationConfig creation."""
    config = InstallationConfig(
        target_dir=Path("/tmp/test"),
        claude_config_path=Path("/tmp/test/claude.json"),
        makefile_path=Path("/tmp/test/Makefile"),
        update_docs=True,
        create_backup=False
    )

    assert config.target_dir == Path("/tmp/test")
    assert config.claude_config_path == Path("/tmp/test/claude.json")
    assert config.makefile_path == Path("/tmp/test/Makefile")
    assert config.update_docs is True
    assert config.create_backup is False