from __future__ import annotations

import json

import pytest
from temporalio.exceptions import ApplicationError

from activity_core import activities
from activity_core.activities import _bind_resolver_result, resolve_context


def test_bind_resolver_result_unwraps_single_key_wrapper() -> None:
    projects = [{"repo": "kaizen-agentic", "has_metrics": True}]
    assert _bind_resolver_result("projects", {"projects": projects}) == projects


def test_bind_resolver_result_keeps_multi_key_summary() -> None:
    summary = {
        "repos": [{"repo_slug": "a"}],
        "stale_count": 1,
        "total_count": 2,
    }
    assert _bind_resolver_result("repos", summary) == summary


@pytest.mark.asyncio
async def test_resolve_context_unwraps_kaizen_projects(monkeypatch) -> None:
    class _FakeResolver:
        def resolve(self, query: str, event: object, params: dict) -> dict:
            assert query == "discover_kaizen_projects"
            return {"projects": [{"repo": "pilot", "has_metrics": True}]}

    import activity_core.context_resolvers  # noqa: F401
    from activity_core.context_resolvers.base import CONTEXT_RESOLVER_REGISTRY

    monkeypatch.setitem(CONTEXT_RESOLVER_REGISTRY, "kaizen", lambda: _FakeResolver())

    snapshot = await resolve_context(
        [
            {
                "type": "kaizen",
                "query": "discover_kaizen_projects",
                "params": {},
                "bind_to": "context.projects",
            }
        ]
    )

    assert snapshot == {"projects": [{"repo": "pilot", "has_metrics": True}]}


@pytest.mark.asyncio
async def test_resolve_context_binds_event_payload_attributes() -> None:
    envelope = {
        "type": "kaizen.metrics.recorded",
        "attributes": {
            "agent": "coach",
            "project": "kaizen-agentic",
            "summary": {
                "success_rate": 0.75,
                "execution_count": 12,
                "avg_quality": 0.81,
            },
        },
    }

    snapshot = await resolve_context(
        [
            {
                "type": "event-payload",
                "bind_to": "context.metrics",
            }
        ],
        json.dumps(envelope),
    )

    assert snapshot == {
        "metrics": {
            "agent": "coach",
            "project": "kaizen-agentic",
            "summary": {
                "success_rate": 0.75,
                "execution_count": 12,
                "avg_quality": 0.81,
            },
        }
    }


@pytest.mark.asyncio
async def test_event_payload_context_supports_low_success_rate_rule() -> None:
    snapshot = await resolve_context(
        [
            {
                "type": "event-payload",
                "bind_to": "context.metrics",
            }
        ],
        json.dumps({
            "type": "kaizen.metrics.recorded",
            "attributes": {
                "agent": "coach",
                "project": "kaizen-agentic",
                "summary": {"success_rate": 0.75},
            },
        }),
    )

    result = await activities.evaluate_rules({
        "rules": [
            {
                "id": "flag-low-success-rate",
                "condition": "context.metrics.summary.success_rate < 0.8",
                "action": {
                    "task_template": (
                        "Review low success rate for {context.metrics.agent}"
                    ),
                    "target_repo": "context.metrics.project",
                    "priority": "high",
                    "labels": ["kaizen", "{context.metrics.agent}"],
                },
            }
        ],
        "event": {},
        "context": snapshot,
    })

    assert len(result) == 1
    assert result[0]["source_id"] == "flag-low-success-rate"
    assert result[0]["title"] == "Review low success rate for coach"
    assert result[0]["target_repo"] == "kaizen-agentic"
    assert result[0]["labels"] == ["kaizen", "coach"]


@pytest.mark.asyncio
async def test_event_payload_context_binds_empty_when_optional_envelope_missing() -> None:
    snapshot = await resolve_context(
        [
            {
                "type": "event-payload",
                "bind_to": "context.metrics",
            }
        ],
    )

    assert snapshot == {"metrics": {}}


@pytest.mark.asyncio
async def test_event_payload_context_fails_when_required_envelope_missing() -> None:
    with pytest.raises(ApplicationError, match="Required context resolver"):
        await resolve_context(
            [
                {
                    "type": "event-payload",
                    "bind_to": "context.metrics",
                    "required": True,
                }
            ],
        )