"""Tests for Phase 9 Commit B reinforcement loop."""

from fastapi.testclient import TestClient

from atocore.interactions.service import record_interaction
from atocore.main import app
from atocore.memory.reinforcement import (
    DEFAULT_CONFIDENCE_DELTA,
    reinforce_from_interaction,
)
from atocore.memory.service import (
    create_memory,
    get_memories,
    reinforce_memory,
)
from atocore.models.database import init_db


# --- service-level tests: reinforce_memory primitive ----------------------


def test_reinforce_memory_bumps_active_memory(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="prefers Python over Ruby for scripting",
        confidence=0.6,
    )

    applied, old_conf, new_conf = reinforce_memory(mem.id, confidence_delta=0.05)

    assert applied is True
    assert old_conf == 0.6
    assert abs(new_conf - 0.65) < 1e-9

    reloaded = get_memories(memory_type="preference", limit=10)
    match = next((m for m in reloaded if m.id == mem.id), None)
    assert match is not None
    assert abs(match.confidence - 0.65) < 1e-9
    assert match.reference_count == 1
    assert match.last_referenced_at  # non-empty


def test_reinforce_memory_caps_at_one(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="identity",
        content="is a mechanical engineer who runs AtoCore",
        confidence=0.98,
    )
    applied, old_conf, new_conf = reinforce_memory(mem.id, confidence_delta=0.05)
    assert applied is True
    assert old_conf == 0.98
    assert new_conf == 1.0


def test_reinforce_memory_rejects_candidate_and_missing(tmp_data_dir):
    init_db()
    candidate = create_memory(
        memory_type="knowledge",
        content="the lateral support uses GF-PTFE pads",
        confidence=0.5,
        status="candidate",
    )
    applied, _, _ = reinforce_memory(candidate.id)
    assert applied is False

    missing, _, _ = reinforce_memory("no-such-id")
    assert missing is False


def test_reinforce_memory_accumulates_reference_count(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="likes concise code reviews that focus on the why",
        confidence=0.5,
    )
    for _ in range(5):
        reinforce_memory(mem.id, confidence_delta=0.01)
    reloaded = [m for m in get_memories(memory_type="preference", limit=10) if m.id == mem.id][0]
    assert reloaded.reference_count == 5
    assert abs(reloaded.confidence - 0.55) < 1e-9


def test_reinforce_memory_rejects_negative_delta(tmp_data_dir):
    init_db()
    mem = create_memory(memory_type="preference", content="always uses structured logging")
    import pytest

    with pytest.raises(ValueError):
        reinforce_memory(mem.id, confidence_delta=-0.01)


# --- reinforce_from_interaction: the high-level matcher -------------------


def _make_interaction(**overrides):
    return record_interaction(
        prompt=overrides.get("prompt", "ignored"),
        response=overrides.get("response", ""),
        response_summary=overrides.get("response_summary", ""),
        project=overrides.get("project", ""),
        client=overrides.get("client", ""),
        session_id=overrides.get("session_id", ""),
        reinforce=False,  # the matcher is tested in isolation here
    )


def test_reinforce_from_interaction_matches_active_memory(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="prefers tests that describe behaviour in plain English",
        confidence=0.5,
    )
    interaction = _make_interaction(
        response=(
            "I wrote the new tests in plain English, since the project "
            "prefers tests that describe behaviour in plain English and "
            "that makes them easier to review."
        ),
    )
    results = reinforce_from_interaction(interaction)
    assert len(results) == 1
    assert results[0].memory_id == mem.id
    assert abs(results[0].new_confidence - (0.5 + DEFAULT_CONFIDENCE_DELTA)) < 1e-9


def test_reinforce_from_interaction_ignores_candidates_and_inactive(tmp_data_dir):
    init_db()
    candidate = create_memory(
        memory_type="knowledge",
        content="the polisher frame uses kinematic mounts for thermal isolation",
        confidence=0.6,
        status="candidate",
    )
    interaction = _make_interaction(
        response=(
            "The polisher frame uses kinematic mounts for thermal isolation, "
            "which matches the note in the design log."
        ),
    )
    results = reinforce_from_interaction(interaction)
    # Candidate should NOT be reinforced even though the text matches
    assert all(r.memory_id != candidate.id for r in results)


def test_reinforce_from_interaction_requires_min_content_length(tmp_data_dir):
    init_db()
    short_mem = create_memory(
        memory_type="preference",
        content="uses SI",  # below min length
    )
    interaction = _make_interaction(
        response="Everything uses SI for this project, consistently.",
    )
    results = reinforce_from_interaction(interaction)
    assert all(r.memory_id != short_mem.id for r in results)


def test_reinforce_from_interaction_empty_response_is_noop(tmp_data_dir):
    init_db()
    create_memory(memory_type="preference", content="prefers structured logging")
    interaction = _make_interaction(response="", response_summary="")
    results = reinforce_from_interaction(interaction)
    assert results == []


def test_reinforce_from_interaction_is_normalized(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="Prefers concise commit messages focused on the why",
    )
    # Response has different casing and extra whitespace — should still match
    interaction = _make_interaction(
        response=(
            "The commit message was short on purpose — the user\n\n"
            "PREFERS concise commit MESSAGES   focused on the WHY, "
            "so I stuck to one sentence."
        ),
    )
    results = reinforce_from_interaction(interaction)
    assert any(r.memory_id == mem.id for r in results)


def test_reinforce_from_interaction_deduplicates_across_buckets(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="identity",
        content="mechanical engineer who runs AtoCore",
        project="",
    )
    # This memory belongs to the identity bucket AND would also be
    # fetched via the project query if project matched. We want to ensure
    # we don't double-reinforce.
    interaction = _make_interaction(
        response="The mechanical engineer who runs AtoCore asked for this patch.",
        project="p05-interferometer",
    )
    results = reinforce_from_interaction(interaction)
    assert sum(1 for r in results if r.memory_id == mem.id) == 1


# --- automatic reinforcement on record_interaction ------------------------


def test_record_interaction_auto_reinforces_by_default(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="writes tests before hooking features into API routes",
        confidence=0.5,
    )
    record_interaction(
        prompt="please add the /foo endpoint with tests",
        response=(
            "Wrote tests first, then added the /foo endpoint. The project "
            "writes tests before hooking features into API routes so the "
            "order is enforced."
        ),
    )
    reloaded = [m for m in get_memories(memory_type="preference", limit=20) if m.id == mem.id][0]
    assert reloaded.confidence > 0.5
    assert reloaded.reference_count == 1


def test_record_interaction_reinforce_false_skips_pass(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="always includes a rollback note in risky commits",
        confidence=0.5,
    )
    record_interaction(
        prompt="ignored",
        response=(
            "I always includes a rollback note in risky commits, so the "
            "commit message mentions how to revert if needed."
        ),
        reinforce=False,
    )
    reloaded = [m for m in get_memories(memory_type="preference", limit=20) if m.id == mem.id][0]
    assert reloaded.confidence == 0.5
    assert reloaded.reference_count == 0


def test_record_interaction_auto_reinforce_handles_empty_response(tmp_data_dir):
    init_db()
    mem = create_memory(memory_type="preference", content="prefers descriptive branch names")
    # No response text — reinforcement should be a silent no-op
    record_interaction(prompt="hi", response="", response_summary="")
    reloaded = [m for m in get_memories(memory_type="preference", limit=20) if m.id == mem.id][0]
    assert reloaded.reference_count == 0


# --- API level ------------------------------------------------------------


def test_api_reinforce_endpoint_runs_against_stored_interaction(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="rejects commits that touch credential files",
        confidence=0.5,
    )
    interaction = record_interaction(
        prompt="review commit",
        response=(
            "I rejects commits that touch credential files on sight. "
            "That commit touched ~/.git-credentials, so it was blocked."
        ),
        reinforce=False,  # leave untouched for the endpoint to do it
    )

    client = TestClient(app)
    response = client.post(f"/interactions/{interaction.id}/reinforce")
    assert response.status_code == 200
    body = response.json()
    assert body["interaction_id"] == interaction.id
    assert body["reinforced_count"] >= 1
    ids = [r["memory_id"] for r in body["reinforced"]]
    assert mem.id in ids


def test_api_reinforce_endpoint_returns_404_for_missing(tmp_data_dir):
    init_db()
    client = TestClient(app)
    response = client.post("/interactions/does-not-exist/reinforce")
    assert response.status_code == 404


def test_api_post_interactions_accepts_reinforce_false(tmp_data_dir):
    init_db()
    mem = create_memory(
        memory_type="preference",
        content="writes runbooks alongside new services",
        confidence=0.5,
    )
    client = TestClient(app)
    response = client.post(
        "/interactions",
        json={
            "prompt": "review",
            "response": (
                "I writes runbooks alongside new services and the diff includes "
                "one under docs/runbooks/."
            ),
            "reinforce": False,
        },
    )
    assert response.status_code == 200
    reloaded = [m for m in get_memories(memory_type="preference", limit=20) if m.id == mem.id][0]
    assert reloaded.confidence == 0.5
    assert reloaded.reference_count == 0