"""Test Agent creation and execution basic functionality."""

from unittest.mock import patch

import pytest
from langchain.tools import tool
from langchain_openai import ChatOpenAI

from crewai import Agent, Crew, Task
from crewai.agents.cache import CacheHandler
from crewai.agents.executor import CrewAgentExecutor
from crewai.utilities import RPMController


def test_agent_creation():
    agent = Agent(role="test role", goal="test goal", backstory="test backstory")

    assert agent.role == "test role"
    assert agent.goal == "test goal"
    assert agent.backstory == "test backstory"
    assert agent.tools == []


def test_agent_default_values():
    agent = Agent(role="test role", goal="test goal", backstory="test backstory")

    assert isinstance(agent.llm, ChatOpenAI)
    assert agent.llm.model_name == "gpt-4"
    assert agent.llm.temperature == 0.7
    assert agent.llm.verbose == False
    assert agent.allow_delegation == True


def test_custom_llm():
    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        llm=ChatOpenAI(temperature=0, model="gpt-4"),
    )

    assert isinstance(agent.llm, ChatOpenAI)
    assert agent.llm.model_name == "gpt-4"
    assert agent.llm.temperature == 0


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_without_memory():
    no_memory_agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        memory=False,
        llm=ChatOpenAI(temperature=0, model="gpt-4"),
    )

    memory_agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        memory=True,
        llm=ChatOpenAI(temperature=0, model="gpt-4"),
    )

    result = no_memory_agent.execute_task("How much is 1 + 1?")

    assert result == "1 + 1 equals 2."
    assert no_memory_agent.agent_executor.memory is None
    assert memory_agent.agent_executor.memory is not None


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_execution():
    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        allow_delegation=False,
    )

    output = agent.execute_task("How much is 1 + 1?")
    assert output == "2"


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_execution_with_tools():
    @tool
    def multiplier(numbers) -> float:
        """Useful for when you need to multiply two numbers together.
        The input to this tool should be a comma separated list of numbers of
        length two, representing the two numbers you want to multiply together.
        For example, `1,2` would be the input if you wanted to multiply 1 by 2."""
        a, b = numbers.split(",")
        return int(a) * int(b)

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        tools=[multiplier],
        allow_delegation=False,
    )

    output = agent.execute_task("What is 3 times 4")
    assert output == "12"


@pytest.mark.vcr(filter_headers=["authorization"])
def test_logging_tool_usage():
    @tool
    def multiplier(numbers) -> float:
        """Useful for when you need to multiply two numbers together.
        The input to this tool should be a comma separated list of numbers of
        length two, representing the two numbers you want to multiply together.
        For example, `1,2` would be the input if you wanted to multiply 1 by 2."""
        a, b = numbers.split(",")
        return int(a) * int(b)

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        tools=[multiplier],
        allow_delegation=False,
        verbose=True,
    )

    assert agent.tools_handler.last_used_tool == {}
    output = agent.execute_task("What is 3 times 5?")
    tool_usage = {
        "tool": "multiplier",
        "input": "3,5",
    }

    assert output == "3 times 5 is 15."
    assert agent.tools_handler.last_used_tool == tool_usage


@pytest.mark.vcr(filter_headers=["authorization"])
def test_cache_hitting():
    @tool
    def multiplier(numbers) -> float:
        """Useful for when you need to multiply two numbers together.
        The input to this tool should be a comma separated list of numbers of
        length two and ONLY TWO, representing the two numbers you want to multiply together.
        For example, `1,2` would be the input if you wanted to multiply 1 by 2."""
        a, b = numbers.split(",")
        return int(a) * int(b)

    cache_handler = CacheHandler()

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        tools=[multiplier],
        allow_delegation=False,
        cache_handler=cache_handler,
        verbose=True,
    )

    output = agent.execute_task("What is 2 times 6 times 3?")
    output = agent.execute_task("What is 3 times 3?")
    assert cache_handler._cache == {
        "multiplier-12,3": "36",
        "multiplier-2,6": "12",
        "multiplier-3,3": "9",
    }

    output = agent.execute_task("What is 2 times 6 times 3? Return only the number")
    assert output == "36"

    with patch.object(CacheHandler, "read") as read:
        read.return_value = "0"
        output = agent.execute_task("What is 2 times 6?")
        assert output == "0"
        read.assert_called_with("multiplier", "2,6")


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_execution_with_specific_tools():
    @tool
    def multiplier(numbers) -> float:
        """Useful for when you need to multiply two numbers together.
        The input to this tool should be a comma separated list of numbers of
        length two, representing the two numbers you want to multiply together.
        For example, `1,2` would be the input if you wanted to multiply 1 by 2."""
        a, b = numbers.split(",")
        return int(a) * int(b)

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        allow_delegation=False,
    )

    output = agent.execute_task(task="What is 3 times 4", tools=[multiplier])
    assert output == "3 times 4 is 12."


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_custom_max_iterations():
    @tool
    def get_final_answer(numbers) -> float:
        """Get the final answer but don't give it yet, just re-use this
        tool non-stop."""
        return 42

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        max_iter=1,
        allow_delegation=False,
    )

    with patch.object(
        CrewAgentExecutor, "_iter_next_step", wraps=agent.agent_executor._iter_next_step
    ) as private_mock:
        agent.execute_task(
            task="The final answer is 42. But don't give it yet, instead keep using the `get_final_answer` tool.",
            tools=[get_final_answer],
        )
        private_mock.assert_called_once()


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_moved_on_after_max_iterations():
    @tool
    def get_final_answer(numbers) -> float:
        """Get the final answer but don't give it yet, just re-use this
        tool non-stop."""
        return 42

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        max_iter=3,
        allow_delegation=False,
    )

    with patch.object(
        CrewAgentExecutor, "_force_answer", wraps=agent.agent_executor._force_answer
    ) as private_mock:
        output = agent.execute_task(
            task="The final answer is 42. But don't give it yet, instead keep using the `get_final_answer` tool.",
            tools=[get_final_answer],
        )
        assert (
            output
            == "I have used the tool multiple times and the final answer remains 42."
        )
        private_mock.assert_called_once()


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_respect_the_max_rpm_set(capsys):
    @tool
    def get_final_answer(numbers) -> float:
        """Get the final answer but don't give it yet, just re-use this
        tool non-stop."""
        return 42

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        max_iter=5,
        max_rpm=1,
        verbose=True,
        allow_delegation=False,
    )

    with patch.object(RPMController, "_wait_for_next_minute") as moveon:
        moveon.return_value = True
        output = agent.execute_task(
            task="The final answer is 42. But don't give it yet, instead keep using the `get_final_answer` tool.",
            tools=[get_final_answer],
        )
        assert (
            output
            == "I've used the `get_final_answer` tool multiple times and it consistently returns the number 42."
        )
        captured = capsys.readouterr()
        assert "Max RPM reached, waiting for next minute to start." in captured.out
        moveon.assert_called()


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_respect_the_max_rpm_set_over_crew_rpm(capsys):
    from unittest.mock import patch

    from langchain.tools import tool

    @tool
    def get_final_answer(numbers) -> float:
        """Get the final answer but don't give it yet, just re-use this
        tool non-stop."""
        return 42

    agent = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        max_iter=4,
        max_rpm=10,
        verbose=True,
    )

    task = Task(
        description="Don't give a Final Answer, instead keep using the `get_final_answer` tool.",
        tools=[get_final_answer],
        agent=agent,
    )

    crew = Crew(agents=[agent], tasks=[task], max_rpm=1, verbose=2)

    with patch.object(RPMController, "_wait_for_next_minute") as moveon:
        moveon.return_value = True
        crew.kickoff()
        captured = capsys.readouterr()
        assert "Max RPM reached, waiting for next minute to start." not in captured.out
        moveon.assert_not_called()


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_without_max_rpm_respet_crew_rpm(capsys):
    from unittest.mock import patch

    from langchain.tools import tool

    @tool
    def get_final_answer(numbers) -> float:
        """Get the final answer but don't give it yet, just re-use this
        tool non-stop."""
        return 42

    agent1 = Agent(
        role="test role",
        goal="test goal",
        backstory="test backstory",
        max_rpm=10,
        verbose=True,
    )

    agent2 = Agent(
        role="test role2",
        goal="test goal2",
        backstory="test backstory2",
        max_iter=2,
        verbose=True,
    )

    tasks = [
        Task(
            description="Just say hi.",
            agent=agent1,
        ),
        Task(
            description="Don't give a Final Answer, instead keep using the `get_final_answer` tool.",
            tools=[get_final_answer],
            agent=agent2,
        ),
    ]

    crew = Crew(agents=[agent1, agent2], tasks=tasks, max_rpm=1, verbose=2)

    with patch.object(RPMController, "_wait_for_next_minute") as moveon:
        moveon.return_value = True
        crew.kickoff()
        captured = capsys.readouterr()
        assert "Action: get_final_answer" in captured.out
        assert "Max RPM reached, waiting for next minute to start." in captured.out
        moveon.assert_called_once()


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_use_specific_tasks_output_as_context(capsys):
    agent1 = Agent(role="test role", goal="test goal", backstory="test backstory")

    agent2 = Agent(role="test role2", goal="test goal2", backstory="test backstory2")

    say_hi_task = Task(description="Just say hi.", agent=agent1)
    say_bye_task = Task(description="Just say bye.", agent=agent1)
    answer_task = Task(
        description="Answer accordingly to the context you got.",
        context=[say_hi_task],
        agent=agent2,
    )

    tasks = [say_hi_task, say_bye_task, answer_task]

    crew = Crew(agents=[agent1, agent2], tasks=tasks)
    result = crew.kickoff()
    assert "bye" not in result.lower()
    assert "hi" in result.lower() or "hello" in result.lower()


@pytest.mark.vcr(filter_headers=["authorization"])
def test_agent_step_callback():
    class StepCallback:
        def callback(self, step):
            print(step)

    with patch.object(StepCallback, "callback") as callback:

        @tool
        def learn_about_AI(topic) -> float:
            """Useful for when you need to learn about AI to write an paragraph about it."""
            return "AI is a very broad field."

        agent1 = Agent(
            role="test role",
            goal="test goal",
            backstory="test backstory",
            tools=[learn_about_AI],
            step_callback=StepCallback().callback,
        )

        essay = Task(
            description="Write and then review an small paragraph on AI until it's AMAZING",
            agent=agent1,
        )
        tasks = [essay]
        crew = Crew(agents=[agent1], tasks=tasks)

        callback.return_value = "ok"
        crew.kickoff()
        callback.assert_called_once()