"""PATCH /entities/{id} — edit mutable fields without cloning (sprint P1)."""

import pytest
from fastapi.testclient import TestClient

from atocore.engineering.service import (
    create_entity,
    get_entity,
    init_engineering_schema,
    update_entity,
)
from atocore.main import app
from atocore.models.database import init_db


@pytest.fixture
def env(tmp_data_dir, tmp_path, monkeypatch):
    registry_path = tmp_path / "test-registry.json"
    registry_path.write_text('{"projects": []}', encoding="utf-8")
    monkeypatch.setenv("ATOCORE_PROJECT_REGISTRY_PATH", str(registry_path))
    from atocore import config
    config.settings = config.Settings()
    init_db()
    init_engineering_schema()
    yield tmp_data_dir


def test_update_entity_description(env):
    e = create_entity(entity_type="component", name="t", description="old desc")
    updated = update_entity(e.id, description="new desc")
    assert updated.description == "new desc"
    assert get_entity(e.id).description == "new desc"


def test_update_entity_properties_merge(env):
    e = create_entity(
        entity_type="component",
        name="t2",
        properties={"color": "red", "kg": 5},
    )
    updated = update_entity(
        e.id, properties_patch={"color": "blue", "material": "invar"},
    )
    assert updated.properties == {"color": "blue", "kg": 5, "material": "invar"}


def test_update_entity_properties_null_deletes_key(env):
    e = create_entity(
        entity_type="component",
        name="t3",
        properties={"color": "red", "kg": 5},
    )
    updated = update_entity(e.id, properties_patch={"color": None})
    assert "color" not in updated.properties
    assert updated.properties.get("kg") == 5


def test_update_entity_confidence_bounds(env):
    e = create_entity(entity_type="component", name="t4", confidence=0.5)
    with pytest.raises(ValueError):
        update_entity(e.id, confidence=1.5)
    with pytest.raises(ValueError):
        update_entity(e.id, confidence=-0.1)


def test_update_entity_source_refs_append_dedup(env):
    e = create_entity(
        entity_type="component",
        name="t5",
        source_refs=["session:a", "session:b"],
    )
    updated = update_entity(
        e.id, append_source_refs=["session:b", "session:c"],
    )
    assert updated.source_refs == ["session:a", "session:b", "session:c"]


def test_update_entity_returns_none_for_unknown(env):
    assert update_entity("nonexistent", description="x") is None


def test_api_patch_happy_path(env):
    e = create_entity(
        entity_type="component",
        name="tower",
        description="old",
        properties={"material": "steel"},
        confidence=0.6,
    )
    client = TestClient(app)
    r = client.patch(
        f"/entities/{e.id}",
        json={
            "description": "three-stage tower",
            "properties": {"material": "invar", "height_mm": 1200},
            "confidence": 0.9,
            "source_refs": ["session:s1"],
            "note": "from voice session",
        },
    )
    assert r.status_code == 200, r.text
    body = r.json()
    assert body["description"] == "three-stage tower"
    assert body["properties"]["material"] == "invar"
    assert body["properties"]["height_mm"] == 1200
    assert body["confidence"] == 0.9
    assert "session:s1" in body["source_refs"]


def test_api_patch_omitted_fields_unchanged(env):
    e = create_entity(
        entity_type="component",
        name="keep-desc",
        description="keep me",
    )
    client = TestClient(app)
    r = client.patch(
        f"/entities/{e.id}",
        json={"confidence": 0.7},
    )
    assert r.status_code == 200
    assert r.json()["description"] == "keep me"


def test_api_patch_404_on_missing(env):
    client = TestClient(app)
    r = client.patch("/entities/does-not-exist", json={"description": "x"})
    assert r.status_code == 404


def test_api_patch_rejects_bad_confidence(env):
    e = create_entity(entity_type="component", name="bad-conf")
    client = TestClient(app)
    r = client.patch(f"/entities/{e.id}", json={"confidence": 2.0})
    assert r.status_code == 400


def test_api_patch_aliased_under_v1(env):
    e = create_entity(entity_type="component", name="v1-patch")
    client = TestClient(app)
    r = client.patch(
        f"/v1/entities/{e.id}",
        json={"description": "via v1"},
    )
    assert r.status_code == 200
    assert get_entity(e.id).description == "via v1"


def test_api_patch_audit_row_written(env):
    from atocore.engineering.service import get_entity_audit

    e = create_entity(entity_type="component", name="audit-check")
    client = TestClient(app)
    client.patch(
        f"/entities/{e.id}",
        json={"description": "new", "note": "manual edit"},
    )
    audit = get_entity_audit(e.id)
    actions = [a["action"] for a in audit]
    assert "updated" in actions