"""Soft links — the counting rules (milestone 440, #4637).

What a suggested link's evidence counts is a design decision with a failure
mode on each side: count every arrival and two similar records "prove" a
relation by resembling each other on every similar prompt; count too little
and nothing ever reaches the bar. These pin the rules as pure functions. The
recorder itself — ACL, judged pairs left alone, the proposal firing once —
is tested against Postgres in tests/test_integration_lesson_rule_links.py.
"""
from __future__ import annotations

import inspect
from datetime import datetime, timedelta, timezone

from scribe.services import lesson_rules as links_svc

NOW = datetime(2026, 10, 1, 12, 0, tzinfo=timezone.utc)


def test_the_same_ask_reworded_trivially_is_one_situation():
    a = links_svc.situation_key("p", "Merge dev to main, please.")
    assert a == links_svc.situation_key("p", "please   MERGE main to dev")
    assert a != links_svc.situation_key("p", "merge the feature branch")


def test_a_file_is_one_situation_however_its_code_differs():
    """The write arm keys on the path, so a run of edits to one file — each
    with different code — is one situation, not one per edit."""
    path = "src/scribe/services/lesson_rules.py"
    assert links_svc.situation_key("w", path) == links_svc.situation_key("w", path)
    assert links_svc.situation_key("w", path) != links_svc.situation_key("w", "src/other.py")


def test_the_two_arms_never_share_a_key():
    assert links_svc.situation_key("p", "routes.py") != links_svc.situation_key("w", "routes.py")


def test_nothing_to_key_on_is_no_situation():
    assert links_svc.situation_key("p", "") == ""
    assert links_svc.situation_key("p", "a is to") == ""   # grammar only


def test_a_repeat_counts_as_an_arrival_but_not_a_situation():
    key = links_svc.situation_key("p", "probe the deployed version")
    ev = links_svc.add_evidence(None, key, 2, NOW)
    ev = links_svc.add_evidence(ev, key, 2, NOW)
    assert links_svc.evidence_summary(ev) == {"situations": 1, "projects": 1, "co_surfaced": 2}


def test_projects_are_distinct_and_an_unbound_reader_adds_none():
    ev = links_svc.add_evidence(None, "p:1", 2, NOW)
    ev = links_svc.add_evidence(ev, "p:2", 5, NOW)
    ev = links_svc.add_evidence(ev, "p:3", None, NOW)
    assert links_svc.evidence_summary(ev)["projects"] == 2


def test_evidence_is_a_new_dict_so_the_column_change_is_seen():
    before = {"co_surfaced": 1, "situations": ["p:1"], "projects": []}
    after = links_svc.add_evidence(before, "p:2", None, NOW)
    assert after is not before
    assert before["situations"] == ["p:1"]


def test_the_proposal_fires_at_the_bar_and_not_before():
    ev = None
    for i in range(links_svc.PROPOSE_SITUATIONS - 1):
        ev = links_svc.add_evidence(ev, f"p:{i}", None, NOW)
    assert not links_svc.proposal_due(ev, NOW)
    ev = links_svc.add_evidence(ev, "p:last", None, NOW)
    assert links_svc.proposal_due(ev, NOW)


def test_a_passed_over_proposal_waits_out_the_cooldown():
    ev = {"situations": ["p:1", "p:2", "p:3"], "proposed_at": NOW.isoformat()}
    assert not links_svc.proposal_due(ev, NOW + timedelta(minutes=5))
    assert links_svc.proposal_due(ev, NOW + links_svc.PROPOSE_COOLDOWN)


def test_the_proposal_names_the_call_that_answers_it():
    line = links_svc._proposal_line(
        41, "An overrun run usually failed early", 7, "Read the job log first",
        "rule", {"situations": ["p:1", "p:2", "p:3"], "projects": [2, 5]},
    )
    assert 'judge_lesson_link(41, 7, "confirm"' in line
    assert '"reject"' in line
    assert "3 distinct situations across 2 projects" in line


def test_evidence_summary_reads_nothing_as_zero_not_an_error():
    assert links_svc.evidence_summary(None) == {"situations": 0, "projects": 0, "co_surfaced": 0}


def test_both_hook_doors_count_the_pair_on_their_own_arm():
    """The two responses that carry lessons and rules together. A door that
    renders both and does not record the pair is the miss this step exists
    to close, and it would produce no error anywhere — only an empty table."""
    from scribe.routes import plugin as plugin_routes
    from scribe.services import plugin_context

    prompt_door = inspect.getsource(plugin_routes.autoinject_retrieve)
    assert "co_surfaced(" in prompt_door and 'arm="p"' in prompt_door
    write_door = inspect.getsource(plugin_context.build_write_path_hint)
    assert "co_surfaced(" in write_door and 'arm="w"' in write_door