import os
import threading
import time

import pytest
import requests
from dotenv import load_dotenv
from letta_client import APIError, Letta
from letta_client.types import CreateBlockParam, MessageCreateParam, SleeptimeManagerParam

from letta.constants import DEFAULT_HUMAN
from letta.utils import get_human_text, get_persona_text


@pytest.fixture(scope="module")
def server_url() -> str:
    """
    Provides the URL for the Letta server.
    If LETTA_SERVER_URL is not set, starts the server in a background thread
    and polls until it's accepting connections.
    """

    def _run_server() -> None:
        load_dotenv()
        from letta.server.rest_api.app import start_server

        start_server(debug=True)

    url: str = os.getenv("LETTA_SERVER_URL", "http://localhost:8283")

    if not os.getenv("LETTA_SERVER_URL"):
        thread = threading.Thread(target=_run_server, daemon=True)
        thread.start()

        # Poll until the server is up (or timeout)
        timeout_seconds = 60
        deadline = time.time() + timeout_seconds
        while time.time() < deadline:
            try:
                resp = requests.get(url + "/v1/health")
                if resp.status_code < 500:
                    break
            except requests.exceptions.RequestException:
                pass
            time.sleep(0.1)
        else:
            raise RuntimeError(f"Could not reach {url} within {timeout_seconds}s")

    return url


@pytest.fixture(scope="module")
def client(server_url: str) -> Letta:
    """
    Creates and returns a synchronous Letta REST client for testing.
    """
    client_instance = Letta(base_url=server_url)
    yield client_instance


@pytest.mark.flaky(max_runs=3)
@pytest.mark.asyncio(loop_scope="module")
async def test_sleeptime_group_chat(client):
    # 1. Create sleeptime agent
    main_agent = client.agents.create(
        name="main_agent",
        memory_blocks=[
            CreateBlockParam(
                label="persona",
                value="You are a personal assistant that helps users with requests.",
            ),
            CreateBlockParam(
                label="human",
                value="My favorite plant is the fiddle leaf\nMy favorite color is lavender",
            ),
        ],
        model="anthropic/claude-sonnet-4-5-20250929",
        embedding="openai/text-embedding-3-small",
        enable_sleeptime=True,
        agent_type="letta_v1_agent",
    )

    assert main_agent.enable_sleeptime == True
    main_agent_tools = [tool.name for tool in main_agent.tools]
    assert "core_memory_append" not in main_agent_tools
    assert "core_memory_replace" not in main_agent_tools
    assert "archival_memory_insert" not in main_agent_tools

    # 2. Override frequency for test
    group = client.groups.update(
        group_id=main_agent.multi_agent_group.id,
        manager_config=SleeptimeManagerParam(
            manager_type="sleeptime",
            sleeptime_agent_frequency=2,
        ),
    )

    assert group.manager_type == "sleeptime"
    assert group.sleeptime_agent_frequency == 2
    assert len(group.agent_ids) == 1

    # 3. Verify shared blocks
    sleeptime_agent_id = group.agent_ids[0]
    shared_block = client.agents.blocks.retrieve(agent_id=main_agent.id, block_label="human")
    agents = client.blocks.agents.list(block_id=shared_block.id).items
    assert len(agents) == 2
    assert sleeptime_agent_id in [agent.id for agent in agents]
    assert main_agent.id in [agent.id for agent in agents]

    # 4 Verify sleeptime agent tools
    sleeptime_agent = client.agents.retrieve(agent_id=sleeptime_agent_id, include=["agent.tools"])
    sleeptime_agent_tools = [tool.name for tool in sleeptime_agent.tools]
    assert "memory_rethink" in sleeptime_agent_tools
    assert "memory_finish_edits" in sleeptime_agent_tools
    assert "memory_replace" in sleeptime_agent_tools
    assert "memory_insert" in sleeptime_agent_tools

    assert len([rule for rule in sleeptime_agent.tool_rules if rule.type == "exit_loop"]) > 0

    # 5. Send messages and verify run ids
    message_text = [
        "my favorite color is orange",
        "not particularly. today is a good day",
        "actually my favorite color is coral",
        "let's change the subject",
        "actually my fav plant is the the african spear",
        "indeed",
    ]
    run_ids = []
    for i, text in enumerate(message_text):
        response = client.agents.messages.create(
            agent_id=main_agent.id,
            messages=[
                MessageCreateParam(
                    role="user",
                    content=text,
                ),
            ],
        )

        assert len(response.messages) > 0
        assert len(response.usage.run_ids or []) == (i + 1) % 2
        run_ids.extend(response.usage.run_ids or [])

        runs = client.runs.list(agent_id=sleeptime_agent_id).items
        assert len(runs) == len(run_ids)

    # 6. Verify run status after sleep and wait for all runs to complete
    time.sleep(2)

    # Wait for all sleeptime agent runs to complete before deleting
    max_wait = 30  # Maximum 30 seconds to wait
    start_time = time.time()
    all_completed = False

    while time.time() - start_time < max_wait and not all_completed:
        all_completed = True
        for run_id in run_ids:
            job = client.runs.retrieve(run_id=run_id)
            if job.status not in ["completed", "failed"]:
                all_completed = False
                break
        if not all_completed:
            time.sleep(0.5)  # Poll every 500ms

    # Verify final status
    for run_id in run_ids:
        job = client.runs.retrieve(run_id=run_id)
        assert job.status in ["running", "completed", "failed"], f"Unexpected status: {job.status}"

    # 7. Delete agent (now safe because all runs are complete)
    client.agents.delete(agent_id=main_agent.id)

    with pytest.raises(APIError):
        client.groups.retrieve(group_id=group.id)
    with pytest.raises(APIError):
        client.agents.retrieve(agent_id=sleeptime_agent_id)


@pytest.mark.skip
@pytest.mark.asyncio(loop_scope="module")
async def test_sleeptime_removes_redundant_information(client):
    # 1. set up sleep-time agent as in test_sleeptime_group_chat
    main_agent = client.agents.create(
        name="main_agent",
        memory_blocks=[
            CreateBlockParam(
                label="persona",
                value="You are a personal assistant that helps users with requests.",
            ),
            CreateBlockParam(
                label="human",
                value="My favorite plant is the fiddle leaf\nMy favorite dog is the husky\nMy favorite plant is the fiddle leaf\nMy favorite plant is the fiddle leaf",
            ),
        ],
        model="anthropic/claude-sonnet-4-5-20250929",
        embedding="openai/text-embedding-3-small",
        enable_sleeptime=True,
        agent_type="letta_v1_agent",
    )

    group = client.groups.update(
        group_id=main_agent.multi_agent_group.id,
        manager_config=SleeptimeManagerParam(
            manager_type="sleeptime",
            sleeptime_agent_frequency=1,
        ),
    )
    sleeptime_agent_id = group.agent_ids[0]
    shared_block = client.agents.blocks.retrieve(agent_id=main_agent.id, block_label="human")
    count_before_memory_edits = shared_block.value.count("fiddle leaf")
    test_messages = ["hello there", "my favorite bird is the sparrow"]

    for test_message in test_messages:
        _ = client.agents.messages.create(
            agent_id=main_agent.id,
            messages=[
                MessageCreateParam(
                    role="user",
                    content=test_message,
                ),
            ],
        )
    # 2. Allow memory blocks time to update
    time.sleep(5)

    # 3. Check that the memory blocks have been collapsed
    shared_block = client.agents.blocks.retrieve(agent_id=main_agent.id, block_label="human")
    count_after_memory_edits = shared_block.value.count("fiddle leaf")
    assert count_after_memory_edits < count_before_memory_edits

    # 4. Delete agent
    client.agents.delete(agent_id=main_agent.id)

    with pytest.raises(APIError):
        client.groups.retrieve(group_id=group.id)
    with pytest.raises(APIError):
        client.agents.retrieve(agent_id=sleeptime_agent_id)


@pytest.mark.asyncio(loop_scope="module")
async def test_sleeptime_edit(client):
    sleeptime_agent = client.agents.create(
        name="sleeptime_agent",
        agent_type="sleeptime_agent",
        memory_blocks=[
            CreateBlockParam(
                label="human",
                value=get_human_text(DEFAULT_HUMAN),
                limit=2000,
            ),
            CreateBlockParam(
                label="memory_persona",
                value=get_persona_text("sleeptime_memory_persona"),
                limit=2000,
            ),
            CreateBlockParam(
                label="fact_block",
                value="""Messi resides in the Paris.
                    Messi plays in the league Ligue 1.
                    Messi plays for the team Paris Saint-Germain.
                    The national team Messi plays for is the Argentina team.
                    Messi is also known as Leo Messi
                    Victor Ulloa plays for Inter Miami""",
                limit=2000,
            ),
        ],
        model="anthropic/claude-sonnet-4-5-20250929",
        embedding="openai/text-embedding-3-small",
        enable_sleeptime=True,
    )

    _ = client.agents.messages.create(
        agent_id=sleeptime_agent.id,
        messages=[
            MessageCreateParam(
                role="user",
                content="Messi has now moved to playing for Inter Miami",
            ),
        ],
    )
    fact_block = client.agents.blocks.retrieve(agent_id=sleeptime_agent.id, block_label="fact_block")
    print(fact_block.value)
    assert fact_block.value.count("Inter Miami") > 1


@pytest.mark.asyncio(loop_scope="module")
async def test_sleeptime_agent_new_block_attachment(client):
    """Test that a new block created after agent creation is properly attached to both main and sleeptime agents."""
    # 1. Create sleeptime agent
    main_agent = client.agents.create(
        name="main_agent",
        memory_blocks=[
            CreateBlockParam(
                label="persona",
                value="You are a personal assistant that helps users with requests.",
            ),
            CreateBlockParam(
                label="human",
                value="My favorite plant is the fiddle leaf\nMy favorite color is lavender",
            ),
        ],
        model="anthropic/claude-sonnet-4-5-20250929",
        embedding="openai/text-embedding-3-small",
        enable_sleeptime=True,
        agent_type="letta_v1_agent",
    )

    assert main_agent.enable_sleeptime == True

    # 2. Get the sleeptime agent ID
    group = main_agent.multi_agent_group
    sleeptime_agent_id = group.agent_ids[0]

    # 3. Verify initial shared blocks
    main_agent_refreshed = client.agents.retrieve(agent_id=main_agent.id, include=["agent.blocks"])
    initial_blocks = main_agent_refreshed.memory.blocks
    initial_block_count = len(initial_blocks)

    # Verify both agents share the initial blocks
    for block in initial_blocks:
        agents = client.blocks.agents.list(block_id=block.id).items
        assert len(agents) == 2
        assert sleeptime_agent_id in [agent.id for agent in agents]
        assert main_agent.id in [agent.id for agent in agents]

    # 4. Create a new block after agent creation
    from letta.schemas.block import Block as PydanticBlock

    new_block = client.blocks.create(
        label="preferences",
        value="My favorite season is autumn\nI prefer tea over coffee",
    )

    # 5. Attach the new block to the main agent
    client.agents.blocks.attach(agent_id=main_agent.id, block_id=new_block.id)

    # 6. Verify the new block is attached to the main agent
    main_agent_refreshed = client.agents.retrieve(agent_id=main_agent.id, include=["agent.blocks"])
    main_agent_blocks = main_agent_refreshed.memory.blocks
    assert len(main_agent_blocks) == initial_block_count + 1
    main_agent_block_ids = [block.id for block in main_agent_blocks]
    assert new_block.id in main_agent_block_ids

    # 7. Check if the new block is also attached to the sleeptime agent (this is where the bug might be)
    sleeptime_agent = client.agents.retrieve(agent_id=sleeptime_agent_id, include=["agent.blocks"])
    sleeptime_agent_blocks = sleeptime_agent.memory.blocks
    sleeptime_agent_block_ids = [block.id for block in sleeptime_agent_blocks]

    # This assertion should pass if the bug is fixed
    assert new_block.id in sleeptime_agent_block_ids, f"New block {new_block.id} not attached to sleeptime agent {sleeptime_agent_id}"

    # 8. Verify that agents sharing the new block include both main and sleeptime agents
    agents_with_new_block = client.blocks.agents.list(block_id=new_block.id).items
    agent_ids_with_new_block = [agent.id for agent in agents_with_new_block]

    assert main_agent.id in agent_ids_with_new_block, "Main agent should have access to the new block"
    assert sleeptime_agent_id in agent_ids_with_new_block, "Sleeptime agent should have access to the new block"
    assert len(agents_with_new_block) == 2, "Both main and sleeptime agents should share the new block"

    # 9. Clean up
    client.agents.delete(agent_id=main_agent.id)
