import pytest

# Import the classes here, assuming the above definitions are in a module named memory_module
from letta.schemas.memory import ChatMemory, Memory


@pytest.fixture
def sample_memory():
    return ChatMemory(persona="Chat Agent", human="User")


def test_create_chat_memory():
    """Test creating an instance of ChatMemory"""
    chat_memory = ChatMemory(persona="Chat Agent", human="User")
    assert chat_memory.get_block("persona").value == "Chat Agent"
    assert chat_memory.get_block("human").value == "User"


def test_memory_limit_validation(sample_memory: Memory):
    """Test exceeding memory limit"""
    with pytest.raises(ValueError):
        ChatMemory(persona="x " * 10000, human="y " * 10000)

    with pytest.raises(ValueError):
        sample_memory.get_block("persona").value = "x " * 10000


def test_memory_jinja2_template(sample_memory: Memory):
    """Test to make sure the jinja2 template string is equivalent to the old __repr__ method"""

    def old_repr(self: Memory) -> str:
        """Generate a string representation of the memory in-context"""
        section_strs = []
        for block in sample_memory.get_blocks():
            section = block.label
            module = block
            section_strs.append(f'<{section} characters="{len(module.value)}/{module.limit}">\n{module.value}\n</{section}>')
        return "\n".join(section_strs)

    old_repr_str = old_repr(sample_memory)
    new_repr_str = sample_memory.compile()
    assert new_repr_str == old_repr_str, f"Expected '{old_repr_str}' to be '{new_repr_str}'"


def test_memory_jinja2_set_template(sample_memory: Memory):
    """Test setting the template for the memory"""

    example_template = sample_memory.get_prompt_template()

    # Try setting a valid template
    sample_memory.set_prompt_template(prompt_template=example_template)

    # Try setting an invalid template (bad jinja2)
    template_bad_jinja = (
        "{% for section, module in mammoth.items() %}"
        '<{{ section }} characters="{{ module.value|length }}/{{ module.limit }}">\n'
        "{{ module.value }}\n"
        "</{{ section }}>"
        "{% if not loop.last %}\n{% endif %}"
        "{% endfor %"  # Missing closing curly brace
    )
    with pytest.raises(ValueError):
        sample_memory.set_prompt_template(prompt_template=template_bad_jinja)

    # Try setting an invalid template (not compatible with memory structure)
    template_bad_memory_structure = (
        "{% for section, module in mammoth.items() %}"
        '<{{ section }} characters="{{ module.value|length }}/{{ module.limit }}">\n'
        "{{ module.value }}\n"
        "</{{ section }}>"
        "{% if not loop.last %}\n{% endif %}"
        "{% endfor %}"
    )
    with pytest.raises(ValueError):
        sample_memory.set_prompt_template(prompt_template=template_bad_memory_structure)