import pytest
from unittest.mock import MagicMock, patch

from haystack.agents.conversational import ConversationalAgent
from haystack.agents.memory import ConversationSummaryMemory, ConversationMemory, NoMemory
from haystack.nodes import PromptNode


@pytest.mark.unit
def test_init():
    with patch("haystack.nodes.prompt.prompt_template.fetch_from_prompthub") as mock_prompthub:
        mock_prompthub.side_effect = [("This is a test prompt. Use your knowledge to answer this question: {question}")]
        prompt_node = PromptNode()
        agent = ConversationalAgent(prompt_node)

    # Test normal case
    assert isinstance(agent.memory, ConversationMemory)
    assert callable(agent.prompt_parameters_resolver)
    assert agent.max_steps == 2
    assert agent.final_answer_pattern == r"^([\s\S]+)$"

    # ConversationalAgent doesn't have tools
    assert not agent.tm.tools


@pytest.mark.unit
def test_init_with_summary_memory():
    with patch("haystack.nodes.prompt.prompt_template.fetch_from_prompthub") as mock_prompthub:
        mock_prompthub.side_effect = [("This is a test prompt. Use your knowledge to answer this question: {question}")]
        prompt_node = PromptNode(default_prompt_template="this is a test")
        # Test with summary memory
        agent = ConversationalAgent(prompt_node, memory=ConversationSummaryMemory(prompt_node))
        assert isinstance(agent.memory, ConversationSummaryMemory)


@pytest.mark.unit
def test_init_with_no_memory():
    with patch("haystack.nodes.prompt.prompt_template.fetch_from_prompthub") as mock_prompthub:
        mock_prompthub.side_effect = [("This is a test prompt. Use your knowledge to answer this question: {question}")]
        prompt_node = PromptNode()
        # Test with no memory
        agent = ConversationalAgent(prompt_node, memory=NoMemory())
        assert isinstance(agent.memory, NoMemory)


@pytest.mark.unit
def test_run():
    with patch("haystack.nodes.prompt.prompt_template.fetch_from_prompthub") as mock_prompthub:
        mock_prompthub.side_effect = [("This is a test prompt. Use your knowledge to answer this question: {question}")]
        prompt_node = PromptNode()
        agent = ConversationalAgent(prompt_node)

        # Mock the Agent run method
        agent.run = MagicMock(return_value="Hello")
        assert agent.run("query") == "Hello"
        agent.run.assert_called_once_with("query")