"""The thought loop: threaded generation, salience/surface gating, feedback."""
from __future__ import annotations

import importlib
import json
from datetime import timedelta

import pytest

from lyra import clock


@pytest.fixture
def lyra(tmp_path, monkeypatch):
    monkeypatch.setenv("LYRA_DB_PATH", str(tmp_path / "test.db"))
    monkeypatch.delenv("NTFY_URL", raising=False)  # baseline: pinging disabled (ignore .env)
    from lyra import llm
    monkeypatch.setattr(llm, "embed", lambda texts: [[0.1, 0.2, 0.3] for _ in texts])

    import lyra.memory as memory
    importlib.reload(memory)
    import lyra.self_state as self_state
    importlib.reload(self_state)
    import lyra.feeds as feeds
    importlib.reload(feeds)
    import lyra.cognition as cognition
    importlib.reload(cognition)
    import lyra.thoughts as thoughts
    importlib.reload(thoughts)

    # Canned LLM: tests set `box["next"]` to the dict think() should "generate".
    box = {"next": {}}
    monkeypatch.setattr(thoughts.llm, "complete",
                        lambda messages, backend=None, model=None: json.dumps(box["next"]))
    # Keep the loop offline + silent by default: no feed fetch, no push.
    monkeypatch.setattr(thoughts.feeds, "next_item", lambda **k: None)
    monkeypatch.setattr(thoughts.notify, "push", lambda **k: False)
    return memory, thoughts, box


def _gen(box, **fields):
    box["next"] = {"title": "t", "kind": "observation", "content": "c",
                   "salience": 0.5, "status": "open"} | fields


def test_new_thread_creates_chain(lyra):
    _, th, box = lyra
    _gen(box, title="my own restlessness", content="I notice a pull toward new ideas.", salience=0.4)
    rep = th.think(force_mode="new")
    assert rep["mode"] == "new"
    threads = th.list_threads()
    assert len(threads) == 1
    assert threads[0]["title"] == "my own restlessness"
    assert threads[0]["status"] == "open"
    chain = th.thread_thoughts(rep["thread_id"])
    assert len(chain) == 1 and "restlessness" not in chain[0]["content"].lower()


def test_continue_advances_same_thread(lyra):
    _, th, box = lyra
    _gen(box, content="first link", salience=0.5)
    r1 = th.think(force_mode="new")
    _gen(box, content="second link, a new angle", salience=0.6)
    r2 = th.think(force_mode="continue")
    assert r2["mode"] == "continue"
    assert r2["thread_id"] == r1["thread_id"]            # same thread
    assert len(th.list_threads()) == 1                    # no new thread opened
    chain = th.thread_thoughts(r1["thread_id"])
    assert [c["content"] for c in chain] == ["first link", "second link, a new angle"]
    # thread salience tracks the latest link
    assert th.get_thread(r1["thread_id"])["salience"] == pytest.approx(0.6)


def test_no_parse_returns_none_and_writes_nothing(lyra):
    _, th, box = lyra
    box["next"] = {}  # empty -> no content -> miss
    assert th.think(force_mode="new") is None
    assert th.list_threads() == []


def test_salience_gates_surfacing(lyra):
    _, th, box = lyra
    _gen(box, content="a quiet musing", salience=0.3)
    th.think(force_mode="new")
    assert th.pending_surface() is None                    # below the bar

    _gen(box, content="something I'd actually raise", salience=0.85)
    th.think(force_mode="new")
    cand = th.pending_surface()
    assert cand is not None and cand["latest"]["content"] == "something I'd actually raise"


def test_maybe_surface_respects_gap_and_marks_once(lyra):
    _, th, box = lyra
    _gen(box, title="restlessness", content="been circling this", salience=0.9)
    th.think(force_mode="new")

    # Brian's mid-conversation (recent) -> don't interrupt.
    from lyra import clock
    recent = clock.now().isoformat()
    assert th.maybe_surface(recent) is None

    # He's been away (no last exchange) -> she leads with it, once.
    note = th.maybe_surface(None)
    assert note and "restlessness" in note and "been circling this" in note
    assert th.maybe_surface(None) is None                  # already surfaced, no repeat
    assert th.list_threads(status="surfaced")              # status flipped


def test_response_then_followup_closes_loop(lyra):
    memory, th, box = lyra
    _gen(box, title="RAG vs custom model", content="maybe RAG is enough", salience=0.8)
    r = th.think(force_mode="new")
    tid = r["thread_id"]
    th.mark_surfaced(tid)

    assert th.record_response(tid, "I think a custom model is the real goal") is True
    assert th._is_pending(th.get_thread(tid)) is True      # awaiting her reaction

    _gen(box, content="ok — RAG now, own model later", salience=0.7, status="answered")
    r2 = th.think(force_mode="respond")
    assert r2["mode"] == "respond" and r2["thread_id"] == tid
    assert th._is_pending(th.get_thread(tid)) is False      # she reacted
    assert th.get_thread(tid)["status"] == "answered"
    assert len(th.thread_thoughts(tid)) == 2


def test_set_status_drop_and_reopen(lyra):
    _, th, box = lyra
    _gen(box, content="x")
    r = th.think(force_mode="new")
    tid = r["thread_id"]
    assert th.set_status(tid, "dropped") is True
    assert th.get_thread(tid)["status"] == "dropped"
    assert th.set_status(tid, "bogus") is False             # unknown status rejected
    assert th.set_status(tid, "open") is True


def test_thought_recorded_in_journal(lyra):
    memory, th, box = lyra
    _gen(box, content="a thought worth keeping")
    th.think(force_mode="new")
    kinds = [e["kind"] for e in memory.list_journal(limit=50)]
    assert "thought" in kinds


def test_decay_rests_stale_threads_but_spares_pending(lyra):
    _, th, box = lyra
    _gen(box, title="stale one", content="old idea", salience=0.8)
    r1 = th.think(force_mode="new")
    _gen(box, title="stale pending", content="awaiting his reply", salience=0.8)
    r2 = th.think(force_mode="new")

    conn = th._c()
    old = (clock.now() - timedelta(hours=72)).isoformat()
    with conn:
        conn.execute("UPDATE thought_threads SET updated_at=? WHERE id=?", (old, r1["thread_id"]))
        conn.execute("UPDATE thought_threads SET updated_at=?, last_response='hm', responded_at=? WHERE id=?",
                     (old, clock.now().isoformat(), r2["thread_id"]))

    assert th.decay() == 1                                   # only the non-pending one
    rested = th.get_thread(r1["thread_id"])
    assert rested["status"] == "resting"
    assert rested["salience"] == pytest.approx(0.8 * th.RESTING_DECAY)
    # the pending thread is spared — she still owes a reaction
    assert th.get_thread(r2["thread_id"])["status"] == "open"
    assert th._is_pending(th.get_thread(r2["thread_id"])) is True


def test_context_note_lists_active_threads(lyra):
    _, th, box = lyra
    assert th.context_note() is None                          # nothing yet
    _gen(box, title="my own restlessness", content="a real thread of mine", salience=0.6)
    th.think(force_mode="new")
    note = th.context_note()
    assert note and "my own restlessness" in note and "a real thread of mine" in note


def test_think_about_tool_seeds_a_thread(lyra):
    _, th, _ = lyra
    import lyra.tools as tools
    importlib.reload(tools)                                   # bind to the reloaded memory/thoughts
    out = tools.dispatch("think_about",
                         {"title": "am I continuous?", "thought": "do I persist between turns?",
                          "kind": "question"})
    assert "am I continuous?" in out
    threads = th.list_threads()
    assert len(threads) == 1 and threads[0]["title"] == "am I continuous?"
    chain = th.thread_thoughts(threads[0]["id"])
    assert chain[0]["kind"] == "question" and chain[0]["source"] == "chat"


# --- external feed -------------------------------------------------------

RSS = (b'<?xml version="1.0"?><rss version="2.0"><channel><title>Feed</title>'
       b'<item><title>Poker tip</title><link>http://x/1</link>'
       b'<description>3-bet more in position</description><guid>g1</guid></item>'
       b'<item><title>Second</title><link>http://x/2</link><description>d2</description></item>'
       b'</channel></rss>')
ATOM = (b'<?xml version="1.0"?><feed xmlns="http://www.w3.org/2005/Atom"><title>F</title>'
        b'<entry><title>HN post</title><link href="http://y/1"/>'
        b'<summary>something interesting</summary><id>a1</id></entry></feed>')


def test_feeds_parse_rss_and_atom():
    from lyra import feeds
    rss = feeds.parse(RSS)
    assert len(rss) == 2
    assert rss[0]["id"] == "g1" and rss[0]["title"] == "Poker tip" and rss[0]["link"] == "http://x/1"
    assert rss[1]["id"] == "http://x/2"                       # falls back to link when no guid
    atom = feeds.parse(ATOM)
    assert len(atom) == 1 and atom[0]["id"] == "a1" and atom[0]["link"] == "http://y/1"
    assert feeds.parse(b"not xml") == []                      # garbage -> empty, no raise


def test_react_mode_makes_a_thread_about_a_feed_item(lyra, monkeypatch):
    _, th, box = lyra
    item = {"id": "x1", "title": "World Item", "link": "http://e", "summary": "stuff happened"}
    monkeypatch.setattr(th.feeds, "next_item", lambda **k: item)
    used = []
    monkeypatch.setattr(th.feeds, "mark_used", lambda i: used.append(i))
    box["next"] = {"kind": "observation", "content": "that makes me think...", "salience": 0.5, "status": "open"}

    rep = th.think(force_mode="react")
    assert rep["mode"] == "react"
    assert th.list_threads()[0]["title"] == "World Item"      # titled from the item
    assert used == ["x1"]                                     # item consumed


# --- proactive reach-out (ntfy) ------------------------------------------

def test_ping_sends_her_personal_message_when_she_reaches_out(lyra, monkeypatch):
    _, th, box = lyra
    monkeypatch.setenv("NTFY_URL", "http://ntfy.test")
    monkeypatch.setenv("PING_QUIET_HOURS", "0-0")            # disable quiet window for the test
    sent = []
    monkeypatch.setattr(th.notify, "push", lambda **k: (sent.append(k), True)[1])

    # high salience AND she wrote a personal note to Brian -> texts him that note
    _gen(box, title="big one", content="internal thought, essay voice", salience=0.9,
         reach_out="Hey — been thinking about you, got a sec?")
    r = th.think(force_mode="new")
    assert r["pinged"] is True
    assert len(sent) == 1
    assert sent[0]["message"] == "Hey — been thinking about you, got a sec?"  # her words, not the thought
    assert th.get_thread(r["thread_id"])["status"] == "surfaced"             # ping marks it surfaced


def test_no_ping_without_a_reach_out_message(lyra, monkeypatch):
    _, th, box = lyra
    monkeypatch.setenv("NTFY_URL", "http://ntfy.test")
    monkeypatch.setenv("PING_QUIET_HOURS", "0-0")
    sent = []
    monkeypatch.setattr(th.notify, "push", lambda **k: (sent.append(k), True)[1])
    # salient thought but she did NOT decide to tell him -> no ping (it's not a broadcast)
    _gen(box, content="a salient thought with no reach_out", salience=0.95)
    assert th.think(force_mode="new")["pinged"] is False and sent == []
    # the placeholder echo is rejected too (model copying the field name)
    _gen(box, content="another", salience=0.95, reach_out="reach_out")
    assert th.think(force_mode="new")["pinged"] is False and sent == []


def test_ping_salience_floor_is_optional(lyra, monkeypatch):
    _, th, _ = lyra
    monkeypatch.setenv("NTFY_URL", "http://ntfy.test")
    monkeypatch.setenv("PING_QUIET_HOURS", "0-0")
    sent = []
    monkeypatch.setattr(th.notify, "push", lambda **k: (sent.append(k), True)[1])
    # default floor 0.0 -> her decision (a message) is enough, any salience pings
    assert th.maybe_ping(1, "hey, thinking of you", 0.2) is True
    # but a floor can be set to suppress low-salience pings
    sent.clear()
    monkeypatch.setenv("PING_SALIENCE", "0.7")
    assert th.maybe_ping(1, "hey", 0.4) is False
    assert th.maybe_ping(1, "hey", 0.8) is True


def test_think_routes_to_introspection_backend(lyra, monkeypatch):
    _, th, box = lyra
    monkeypatch.setenv("INTROSPECTION_BACKEND", "local")
    monkeypatch.setenv("INTROSPECTION_MODEL", "dolphin3:8b")
    seen = {}

    def cap(messages, backend="local", model=None):
        seen["backend"], seen["model"] = backend, model
        return json.dumps(box["next"])

    monkeypatch.setattr(th.llm, "complete", cap)
    _gen(box, content="a thought")
    th.think(force_mode="new")
    assert seen["backend"] == "local" and seen["model"] == "dolphin3:8b"


def test_no_ping_without_ntfy(lyra, monkeypatch):
    _, th, _ = lyra
    sent = []
    monkeypatch.setattr(th.notify, "push", lambda **k: (sent.append(k), True)[1])
    # no NTFY_URL in env -> disabled even with a message + high salience
    assert th.maybe_ping(1, "hey there", 0.99) is False
    assert sent == []