import pytest
from fastapi.testclient import TestClient

# The events beacon now drops known-bot User-Agents (queries.is_bot_ua), and the test
# client's default UA contains "python" → would be filtered. Send a real browser UA so
# these record like a genuine visitor; the bot case is covered explicitly below.
_BROWSER = {"user-agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 "
                          "(KHTML, like Gecko) Chrome/120.0 Safari/537.36"}


@pytest.fixture
def app_db(tmp_path, monkeypatch):
    db = tmp_path / "t.sqlite3"
    monkeypatch.setenv("GOODNEWS_DB", str(db))
    monkeypatch.setenv("GOODNEWS_SESSION_SECRET", "test-secret")
    import importlib
    import goodnews.api as api
    importlib.reload(api)
    from goodnews.db import connect, init_db
    connect(str(db)).close()  # creates schema lazily? ensure init
    c = connect(str(db)); init_db(c); c.close()
    return api.create_app(), db


def _count(db, **where):
    from goodnews.db import connect
    c = connect(str(db))
    clause = " AND ".join(f"{k}=?" for k in where)
    sql = "SELECT COUNT(*) FROM events" + (f" WHERE {clause}" if where else "")
    n = c.execute(sql, tuple(where.values())).fetchone()[0]
    c.close()
    return n


def test_event_recorded_and_deduped(app_db):
    app, db = app_db
    tc = TestClient(app, headers=_BROWSER)
    for _ in range(3):  # same (kind, article, visitor, day) → one row
        assert tc.post("/api/events", json={"kind": "open", "article_id": 5, "visitor": "tok"}).json() == {"ok": True}
    assert _count(db, kind="open", article_id=5) == 1
    # a different visitor is a distinct row
    tc.post("/api/events", json={"kind": "open", "article_id": 5, "visitor": "other"})
    assert _count(db, kind="open", article_id=5) == 2


def test_visitor_token_is_hashed_not_stored_raw(app_db):
    app, db = app_db
    TestClient(app, headers=_BROWSER).post("/api/events", json={"kind": "visit", "visitor": "secret-token"})
    from goodnews.db import connect
    c = connect(str(db))
    vh = c.execute("SELECT visitor_hash FROM events").fetchone()[0]
    c.close()
    assert vh and vh != "secret-token" and len(vh) == 64  # sha256 hex


def test_unknown_kind_is_ignored(app_db):
    app, db = app_db
    assert TestClient(app, headers=_BROWSER).post("/api/events", json={"kind": "evil", "visitor": "x"}).json() == {"ok": True}
    assert _count(db) == 0


def test_bot_user_agents_are_not_counted(app_db):
    """JS-capable crawlers fire this beacon too; honest bot UAs must not inflate counts.
    Response stays {ok:true} so a bot can't tell it was dropped."""
    app, db = app_db
    for bot_ua in ("Mozilla/5.0 (compatible; GPTBot/1.0; +https://openai.com/gptbot)",
                   "Mozilla/5.0 (compatible; AhrefsBot/7.0; +http://ahrefs.com/robot/)",
                   "Mozilla/5.0 (X11; Linux x86_64) HeadlessChrome/120.0 Safari/537.36"):
        tc = TestClient(app, headers={"user-agent": bot_ua})
        assert tc.post("/api/events", json={"kind": "visit", "visitor": "b"}).json() == {"ok": True}
    assert _count(db, kind="visit") == 0                      # none recorded
    # a real browser on the same beacon IS counted
    TestClient(app, headers=_BROWSER).post("/api/events", json={"kind": "visit", "visitor": "human"})
    assert _count(db, kind="visit") == 1


def test_game_event_kinds_are_allowed(app_db):
    app, db = app_db
    tc = TestClient(app, headers=_BROWSER)
    # the per-game funnel kinds (incl. the share-loop arrival) pass the allowlist
    for kind in ("word_started", "word_completed", "word_shared", "word_arrival", "match_arrival"):
        assert tc.post("/api/events", json={"kind": kind, "article_id": 0, "visitor": "t"}).json() == {"ok": True}
        assert _count(db, kind=kind) == 1
    # a bogus game kind is still rejected
    tc.post("/api/events", json={"kind": "chess_started", "visitor": "t"})
    assert _count(db, kind="chess_started") == 0


def test_admin_stats_games_funnel_aggregates(app_db):
    app, db = app_db
    tc = TestClient(app, headers=_BROWSER)
    # two visitors arrive at Daily Word via a shared link; one engages + shares; a Match completes
    for v in ("a", "b"):
        tc.post("/api/events", json={"kind": "word_arrival", "article_id": 0, "visitor": v})
    tc.post("/api/events", json={"kind": "word_started", "article_id": 0, "visitor": "a"})
    tc.post("/api/events", json={"kind": "word_shared", "article_id": 0, "visitor": "a"})
    tc.post("/api/events", json={"kind": "match_completed", "article_id": 0, "visitor": "a"})
    from goodnews.db import connect
    from goodnews import queries
    c = connect(str(db))
    games = queries.admin_stats(c, days=30)["games"]
    c.close()
    assert games["by_game"]["word"] == {"arrival": 2, "started": 1, "completed": 0, "shared": 1}
    assert games["by_game"]["match"]["completed"] == 1
    assert games["totals"]["arrival"] == 2 and games["totals"]["shared"] == 1


def test_engaged_readers_metric(app_db):
    """Engaged readers counts the gesture-gated 'engaged' beacon + deliberate actions,
    NOT auto-fired visit/summary_viewed or a game-share arrival."""
    app, db = app_db
    tc = TestClient(app, headers=_BROWSER)
    tc.post("/api/events", json={"kind": "engaged", "visitor": "a"})                       # gesture beacon
    tc.post("/api/events", json={"kind": "source_click", "article_id": 5, "visitor": "b"})  # deliberate
    tc.post("/api/events", json={"kind": "visit", "visitor": "c"})                          # raw visit only
    tc.post("/api/events", json={"kind": "summary_viewed", "article_id": 5, "visitor": "c"})  # auto-fired
    tc.post("/api/events", json={"kind": "word_arrival", "visitor": "d"})                   # share-loop landing
    from goodnews.db import connect
    from goodnews import queries
    cn = connect(str(db)); v = queries.admin_stats(cn, days=30)["visitors"]; cn.close()
    assert v["engaged_today"] == 2     # a (engaged) + b (source_click)
    assert v["today"] == 1             # only c fired a raw visit