"""
🧠 Diary → graph console-logging regression tests.

After #282 added duplicate-skip on the cumulative-summary re-flush path,
the `🧠 Knowledge graph: learned N new facts` line in
``update_diary_from_dialogue_memory`` went silent on every flush past the
first: every re-extraction routed to a node that already contained the
fact, ``stored`` came back empty, and the print was gated on a non-empty
list. From the user's perspective the memory pipeline looked dead.

These tests lock in all four CLI states (mixed, only-new, all-duplicate,
silent-empty) plus singular pluralisation, so the regression can't slip
back in unnoticed.
"""

from unittest.mock import patch

import pytest

from jarvis.memory.graph_ops import GraphUpdateResult


@pytest.mark.unit
class TestKnowledgeGraphConsoleLogging:
    """Behavioural tests for the 🧠 console line emitted after a diary flush."""

    def _run_flush(self, db, dialogue_memory, graph_result):
        """Drive ``update_diary_from_dialogue_memory`` with a stubbed
        summariser and graph updater, returning whatever it printed.

        ``graph_result`` is the ``GraphUpdateResult`` the patched
        ``update_graph_from_dialogue`` should return.
        """
        from jarvis.memory.conversation import update_diary_from_dialogue_memory

        dialogue_memory.add_message("user", "I learned that bats are not blind")
        dialogue_memory.add_message("assistant", "Correct, they use echolocation in addition to sight.")

        with patch(
            "jarvis.memory.conversation.generate_conversation_summary",
            return_value=("User asked about bats. Bats are not blind.", "bats, biology"),
        ), patch(
            "jarvis.memory.graph_ops.update_graph_from_dialogue",
            return_value=graph_result,
        ):
            return update_diary_from_dialogue_memory(
                db=db,
                dialogue_memory=dialogue_memory,
                ollama_base_url="http://localhost:11434",
                ollama_chat_model="test",
                ollama_embed_model="test",
                force=True,
                timeout_sec=5.0,
            )

    def test_logs_count_when_new_facts_stored(self, db, dialogue_memory, capsys):
        """Mixed flush: 2 new + 1 duplicate prints the count and per-fact preview."""
        result = GraphUpdateResult(
            stored=[
                ("Bats use echolocation.", "world"),
                ("User is curious about bats.", "user"),
            ],
            skipped=1,
        )
        summary_id = self._run_flush(db, dialogue_memory, result)
        assert summary_id is not None

        out = capsys.readouterr().out
        assert "🧠 Knowledge graph: learned 2 new facts" in out
        assert "(1 duplicate skipped)" in out
        assert "Bats use echolocation. → world" in out
        assert "User is curious about bats. → user" in out

    def test_logs_singular_when_one_new_fact(self, db, dialogue_memory, capsys):
        """Pluralisation: a single new fact uses singular wording."""
        result = GraphUpdateResult(
            stored=[("Bats use echolocation.", "world")],
            skipped=0,
        )
        self._run_flush(db, dialogue_memory, result)

        out = capsys.readouterr().out
        assert "🧠 Knowledge graph: learned 1 new fact" in out
        # No trailing 's' on 'fact' and no "duplicates skipped" tail.
        assert "1 new facts" not in out
        assert "duplicate" not in out

    def test_logs_duplicates_when_only_skipped(self, db, dialogue_memory, capsys):
        """All-duplicate flush still prints a status line.

        This is the regression #282 introduced: extraction ran, the LLM
        produced facts, but every one was a duplicate so ``stored`` was
        empty and the previous gate suppressed the print entirely. The
        user lost their only signal that the memory pipeline was alive.
        """
        result = GraphUpdateResult(stored=[], skipped=3)
        self._run_flush(db, dialogue_memory, result)

        out = capsys.readouterr().out
        assert "🧠 Knowledge graph: nothing new" in out
        assert "(3 duplicates skipped)" in out

    def test_logs_singular_duplicate(self, db, dialogue_memory, capsys):
        """Pluralisation: a single duplicate uses singular wording."""
        result = GraphUpdateResult(stored=[], skipped=1)
        self._run_flush(db, dialogue_memory, result)

        out = capsys.readouterr().out
        assert "(1 duplicate skipped)" in out
        assert "1 duplicates" not in out

    def test_silent_when_extractor_returned_nothing(self, db, dialogue_memory, capsys):
        """Empty extraction (no facts and no duplicates) stays quiet.

        Distinct from the all-duplicate case: there's genuinely nothing
        to report, so we don't add console noise on every diary flush
        that didn't yield knowledge.
        """
        result = GraphUpdateResult(stored=[], skipped=0)
        self._run_flush(db, dialogue_memory, result)

        out = capsys.readouterr().out
        assert "🧠 Knowledge graph" not in out