import pytest
from unittest.mock import MagicMock, patch
from ea_chatbot.graph.nodes.coder import coder_node
from ea_chatbot.graph.nodes.error_corrector import error_corrector_node

@pytest.fixture
def mock_state():
    return {
        "messages": [],
        "question": "Show me results for New Jersey",
        "plan": "Step 1: Load data\nStep 2: Filter by NJ",
        "code": None,
        "error": None,
        "plots": [],
        "dfs": {},
        "next_action": "plan"
    }

@patch("ea_chatbot.graph.nodes.coder.get_llm_model")
@patch("ea_chatbot.utils.database_inspection.get_data_summary")
def test_coder_node(mock_get_summary, mock_get_llm, mock_state):
    """Test coder node generates code from plan."""
    mock_get_summary.return_value = "Column: Name, Type: text"
    
    mock_llm = MagicMock()
    mock_get_llm.return_value = mock_llm
    
    from ea_chatbot.schemas import CodeGenerationResponse
    mock_response = CodeGenerationResponse(
        code="import pandas as pd\nprint('Hello')",
        explanation="Generated code"
    )
    mock_llm.with_structured_output.return_value.invoke.return_value = mock_response
    
    result = coder_node(mock_state)
    
    assert "code" in result
    assert "import pandas as pd" in result["code"]
    assert "error" in result
    assert result["error"] is None

@patch("ea_chatbot.graph.nodes.error_corrector.get_llm_model")
def test_error_corrector_node(mock_get_llm, mock_state):
    """Test error corrector node fixes code."""
    mock_state["code"] = "import pandas as pd\nprint(undefined_var)"
    mock_state["error"] = "NameError: name 'undefined_var' is not defined"
    
    mock_llm = MagicMock()
    mock_get_llm.return_value = mock_llm
    
    from ea_chatbot.schemas import CodeGenerationResponse
    mock_response = CodeGenerationResponse(
        code="import pandas as pd\nprint('Defined')",
        explanation="Fixed variable"
    )
    mock_llm.with_structured_output.return_value.invoke.return_value = mock_response
    
    result = error_corrector_node(mock_state)
    
    assert "code" in result
    assert "print('Defined')" in result["code"]
    assert result["error"] is None