from __future__ import annotations

import asyncio
from pathlib import Path
from types import SimpleNamespace

from beaver.engine import EngineLoader
from beaver.engine.providers.base import LLMProvider, LLMResponse
from beaver.engine.providers.factory import ProviderBundle
from beaver.services.agent_service import AgentService
from beaver.tasks import TaskExecutionPlan, TaskService


class StubProvider(LLMProvider):
    def __init__(self, responses: list[LLMResponse]) -> None:
        super().__init__()
        self._responses = list(responses)

    async def chat(
        self,
        messages: list[dict],
        tools: list[dict] | None = None,
        model: str | None = None,
        max_tokens: int = 4096,
        temperature: float = 0.7,
    ) -> LLMResponse:
        if not self._responses:
            raise AssertionError("No stubbed provider responses left")
        return self._responses.pop(0)

    def get_default_model(self) -> str:
        return "stub-model"


class StubTaskExecutionPlanner:
    async def plan(self, **kwargs) -> TaskExecutionPlan:
        return TaskExecutionPlan.single("test-single")


class FakeLearningCandidate:
    def to_dict(self) -> dict:
        return {"candidate_id": "candidate-1", "kind": "new_skill", "status": "open"}


def _route_response(action: str = "new_task", short_title: str = "Test task") -> LLMResponse:
    return LLMResponse(
        content=f'{{"action":"{action}","reason":"test route","short_title":"{short_title}"}}',
        finish_reason="stop",
        provider_name="stub",
        model="stub-model",
    )


def _bundle(*responses: str, route_action: str = "new_task") -> ProviderBundle:
    return ProviderBundle(
        main_runtime=SimpleNamespace(model="stub-model", provider_name="stub"),
        main_provider=StubProvider(
            [
                LLMResponse(
                    content=response,
                    finish_reason="stop",
                    provider_name="stub",
                    model="stub-model",
                )
                for response in responses
            ]
        ),
        auxiliary_runtime=SimpleNamespace(model="stub-model", provider_name="stub"),
        auxiliary_provider=StubProvider([_route_response(route_action)]),
    )


def test_task_run_records_evidence_and_waits_for_acceptance(tmp_path: Path) -> None:
    service = AgentService(
        loader=EngineLoader(
            workspace=tmp_path,
            task_execution_planner=StubTaskExecutionPlanner(),
        )
    )

    result = asyncio.run(
        service.process_direct(
            "draft release notes",
            session_id="web:test",
            provider_bundle=_bundle("Done"),
        )
    )

    task_service = service.create_loop().boot().task_service
    assert task_service is not None
    task = task_service.get_task(result.task_id or "")
    assert task is not None
    assert task.status == "awaiting_acceptance"
    assert task.validation_result is None
    assert result.validation_result is None

    event_types = [event.event_type for event in task_service.list_events(task.task_id)]
    assert "evidence_recorded" in event_types
    assert "validated" not in event_types


def test_acceptance_closes_task_and_triggers_learning(tmp_path: Path) -> None:
    service = AgentService(
        loader=EngineLoader(
            workspace=tmp_path,
            task_execution_planner=StubTaskExecutionPlanner(),
        )
    )
    result = asyncio.run(
        service.process_direct(
            "write implementation plan",
            session_id="web:acceptance",
            provider_bundle=_bundle("Plan"),
        )
    )

    loaded = service.create_loop().boot()
    generated: list[tuple[str, str]] = []

    def build_learning_candidates_for_task(
        task_id: str,
        *,
        final_accepted_run_id: str | None = None,
        trigger_run_id: str | None = None,
    ) -> list[FakeLearningCandidate]:
        generated.append((task_id, final_accepted_run_id or trigger_run_id or ""))
        return [FakeLearningCandidate()]

    loaded.skill_learning_service.build_learning_candidates_for_task = build_learning_candidates_for_task

    response = asyncio.run(
        service.submit_acceptance(
            session_id="web:acceptance",
            run_id=result.run_id,
            acceptance_type="accept",
        )
    )

    assert response["task_status"] == "closed"
    assert response["acceptance_type"] == "accept"
    assert response["learning_candidates"] == [
        {"candidate_id": "candidate-1", "kind": "new_skill", "status": "open"}
    ]
    assert generated == [(result.task_id, result.run_id)]

    task_service = loaded.task_service
    assert task_service is not None
    task = task_service.get_task(result.task_id or "")
    assert task is not None
    assert task.metadata["final_accepted_run_id"] == result.run_id


def test_revise_and_abandon_do_not_trigger_learning(tmp_path: Path) -> None:
    service = AgentService(
        loader=EngineLoader(
            workspace=tmp_path,
            task_execution_planner=StubTaskExecutionPlanner(),
        )
    )
    result = asyncio.run(
        service.process_direct(
            "summarize notes",
            session_id="web:revise",
            provider_bundle=_bundle("Summary"),
        )
    )

    response = asyncio.run(
        service.submit_acceptance(
            session_id="web:revise",
            run_id=result.run_id,
            acceptance_type="revise",
            comment="Add decisions",
        )
    )

    assert response["task_status"] == "needs_revision"
    assert response["learning_candidates"] == []

    task_service = service.create_loop().boot().task_service
    assert task_service is not None
    task = task_service.get_task(result.task_id or "")
    assert task is not None
    assert task.feedback[0]["acceptance_type"] == "revise"


def test_legacy_feedback_endpoint_maps_satisfied_to_accept(tmp_path: Path) -> None:
    service = AgentService(
        loader=EngineLoader(
            workspace=tmp_path,
            task_execution_planner=StubTaskExecutionPlanner(),
        )
    )
    result = asyncio.run(
        service.process_direct(
            "prepare checklist",
            session_id="web:legacy",
            provider_bundle=_bundle("Checklist"),
        )
    )

    response = asyncio.run(
        service.submit_feedback(
            session_id="web:legacy",
            run_id=result.run_id,
            feedback_type="satisfied",
        )
    )

    assert response["acceptance_type"] == "accept"
    assert response["feedback_type"] == "satisfied"
    assert response["task_status"] == "closed"


def test_task_service_maps_legacy_status_and_feedback(tmp_path: Path) -> None:
    service = TaskService(tmp_path)
    task = service.create_task(session_id="s", description="legacy")
    task.status = "awaiting_feedback"
    task.feedback.append({"feedback_type": "satisfied", "run_id": "run-1"})
    service.store.upsert_task(task)

    loaded = service.get_task(task.task_id)

    assert loaded is not None
    assert loaded.status == "awaiting_acceptance"
    assert loaded.feedback[0]["acceptance_type"] == "accept"