"""Tests for recall_gate.should_recall — cheap heuristic for skipping
long-term memory enrichment when the hot-window already covers the topic.
"""

import pytest

from src.jarvis.memory.recall_gate import should_recall


@pytest.mark.unit
class TestShouldRecall:
    def test_empty_hot_window_always_recalls(self):
        assert should_recall("who is justin bieber", []) is True

    def test_no_tool_result_in_history_always_recalls(self):
        recent = [
            {"role": "user", "content": "who is justin bieber"},
            {"role": "assistant", "content": "He is a Canadian singer."},
        ]
        # No tool row → no fresh grounded data → recall (diary may know more)
        assert should_recall("what is his most famous song", recent) is True

    def test_tool_covered_topic_skips_recall(self):
        recent = [
            {"role": "user", "content": "who is justin bieber"},
            {"role": "assistant", "content": "", "tool_calls": [
                {"id": "c1", "type": "function",
                 "function": {"name": "webSearch",
                              "arguments": {"query": "justin bieber"}}}
            ]},
            {"role": "tool", "tool_call_id": "c1",
             "content": "Justin Bieber is a Canadian singer with hits like Baby."},
            {"role": "assistant", "content": "Canadian singer."},
        ]
        # Follow-up on same entity, fresh tool row present → skip
        assert should_recall("what is his most famous song bieber hits",
                             recent) is False

    def test_topic_change_still_recalls(self):
        recent = [
            {"role": "user", "content": "who is justin bieber"},
            {"role": "tool", "tool_call_id": "c1",
             "content": "Justin Bieber is a Canadian singer."},
            {"role": "assistant", "content": "Canadian singer."},
        ]
        # Completely different topic → no overlap → recall runs
        assert should_recall("what's the weather in hackney", recent) is True

    def test_non_latin_script_query_matches_hot_window(self):
        """Per CLAUDE.md the gate must be language-agnostic. A Cyrillic query
        covered by a Cyrillic tool result should skip recall just like English.
        """
        recent = [
            {"role": "user", "content": "кто такой пушкин"},
            {"role": "tool", "tool_call_id": "c1",
             "content": "Пушкин это русский поэт девятнадцатого века."},
            {"role": "assistant", "content": "Русский поэт."},
        ]
        assert should_recall("пушкин русский поэт стихи", recent) is False

    def test_non_latin_topic_change_still_recalls(self):
        recent = [
            {"role": "user", "content": "кто такой пушкин"},
            {"role": "tool", "tool_call_id": "c1",
             "content": "Пушкин это русский поэт."},
        ]
        # Different topic in the same script → no overlap → recall
        assert should_recall("какая сегодня погода", recent) is True

    def test_stopword_only_query_does_not_skip(self):
        recent = [
            {"role": "tool", "tool_call_id": "c1", "content": "foo bar"},
        ]
        # "what is it" has no content words → cannot justify skipping
        assert should_recall("what is it", recent) is True