import unittest

import api


class SocketLayerCase(unittest.IsolatedAsyncioTestCase):
    """Drives the socket handlers directly with a fake emit, asserting the
    identity-binding, privacy, lifecycle and error-handling guarantees."""

    def setUp(self):
        api.games.clear()
        api.sessions.clear()
        self.emits = []

        async def fake_emit(event, data=None, room=None, to=None, **kw):
            self.emits.append({"event": event, "data": data, "room": room, "to": to})

        async def noop(*a, **kw):
            pass

        # Patch the network-facing primitives; logic under test is untouched.
        api.sio.emit = fake_emit
        api.sio.enter_room = noop
        api.sio.leave_room = noop

    # --- helpers ----------------------------------------------------------

    def last(self, event):
        return next(e for e in reversed(self.emits) if e["event"] == event)

    def events(self, event):
        return [e for e in self.emits if e["event"] == event]

    async def make_game(self):
        await api.create_game("host", "Game")
        return list(api.games.keys())[0]

    async def make_started_game(self):
        gid = await self.make_game()
        for i in range(4):
            await api.register_player(f"s{i}", gid, f"P{i}")
        await api.start_game("s0", gid)
        return gid

    # --- creation & lobby -------------------------------------------------

    async def test_create_game_mints_uuid(self):
        gid = await self.make_game()
        self.assertNotEqual(gid, "a")
        self.assertEqual(len(gid), 36)
        self.assertEqual(self.last("create_game")["data"]["gid"], gid)

    async def test_lobby_payload_hides_sids_and_tokens(self):
        gid = await self.make_game()
        await api.register_player("s0", gid, "P0")
        lobby = self.last("get_games")["data"]["games"]
        blob = repr(lobby)
        self.assertNotIn("sid", blob)
        self.assertNotIn("token", blob)
        self.assertEqual(lobby[0]["players"][0], {"order": 0, "name": "P0", "connected": True})

    async def test_register_returns_private_token_to_caller_only(self):
        gid = await self.make_game()
        await api.register_player("s0", gid, "P0")
        reg = self.last("register_player")
        self.assertEqual(reg["to"], "s0")
        self.assertIn("token", reg["data"])
        self.assertEqual(reg["data"]["player"], {"order": 0, "name": "P0"})

    async def test_register_rejects_unknown_game_fifth_and_started(self):
        await api.register_player("x", "nope", "P")  # unknown gid
        self.assertEqual(self.last("error")["data"]["error"], "Hra neexistuje.")

        gid = await self.make_game()
        for i in range(4):
            await api.register_player(f"s{i}", gid, f"P{i}")
        await api.register_player("s4", gid, "P4")  # fifth
        self.assertEqual(self.last("error")["data"]["error"], "Prekroceny pocet hracov.")

        await api.start_game("s0", gid)
        await api.register_player("s5", gid, "late")  # already started
        self.assertEqual(self.last("error")["data"]["error"], "Hra uz zacala.")

    # --- start lifecycle --------------------------------------------------

    async def test_start_deals_and_emits_private_hands(self):
        gid = await self.make_started_game()
        self.assertTrue(api.games[gid].started)
        self.assertEqual(self.last("game_status")["room"], gid)
        hands = self.events("player_cards")
        self.assertEqual(sorted(h["to"] for h in hands), ["s0", "s1", "s2", "s3"])

    async def test_start_game_twice_is_rejected_and_does_not_reset(self):
        gid = await self.make_started_game()
        core_before = api.games[gid].bridzik_core
        await api.start_game("s0", gid)
        self.assertEqual(self.last("error")["data"]["error"], "Hra uz zacala.")
        self.assertIs(api.games[gid].bridzik_core, core_before)

    # --- identity binding (the anti-cheat guarantee) ----------------------

    async def test_player_cards_serves_only_your_own_seat(self):
        gid = await self.make_started_game()
        # The handler takes no player argument: a connection can only ever
        # request the hand bound to its own session.
        self.emits.clear()
        await api.player_cards("s2")
        sent = self.last("player_cards")
        self.assertEqual(sent["to"], "s2")
        expected = api.games[gid].bridzik_core.get_player_cards(2)
        self.assertEqual(len(sent["data"]["cards"]), len(expected))

    async def test_action_without_session_is_rejected(self):
        await self.make_started_game()
        await api.add_guess("stranger", 1)
        self.assertEqual(self.last("error")["data"]["error"], "Nie ste v rozohratej hre.")

    # --- full play flow ---------------------------------------------------

    async def test_guess_and_play_flow(self):
        gid = await self.make_started_game()
        core = api.games[gid].bridzik_core
        # Round 0 leads with seat 0; guess 0 all round (sum 0 != 8 tricks).
        for i in range(4):
            await api.add_guess(f"s{i}", 0)
        rnd = core.series[-1].get_last_round()
        self.assertTrue(rnd.is_guessing_completed())
        leader = rnd.get_active_player()

        before = len(core.get_player_cards(leader))
        self.emits.clear()
        await api.play_card(f"s{leader}", 0)
        after = len(core.get_player_cards(leader))
        self.assertEqual(after, before - 1)
        status = self.last("game_status")["data"]
        self.assertIn("completed", status)
        self.assertIn("active_stash", status["status"])

    async def test_bad_input_does_not_crash(self):
        await self.make_started_game()
        await api.add_guess("s0", "not-a-number")
        self.assertEqual(self.last("error")["data"]["error"], "Neplatny tip.")
        await api.play_card("s0", "xx")
        self.assertEqual(self.last("error")["data"]["error"], "Neplatna karta.")

    async def test_engine_error_message_is_forwarded(self):
        gid = await self.make_started_game()
        # Seat 0 leads guessing; seat 1 acting out of turn -> engine rejects,
        # and the real (Slovak) reason is forwarded, not a generic message.
        await api.add_guess("s1", 1)
        self.assertEqual(self.last("error")["data"]["error"], "Hrac nie je na tahu")

    # --- reconnect --------------------------------------------------------

    async def test_secure_reconnect_with_token_rebinds_seat(self):
        gid = await self.make_game()
        await api.register_player("s0", gid, "P0")
        token = self.last("register_player")["data"]["token"]
        for i in range(1, 4):
            await api.register_player(f"s{i}", gid, f"P{i}")
        await api.start_game("s0", gid)

        await api.reconnect_to_game("s0-new", gid, token)
        self.assertEqual(api.games[gid].player_by_token(token).sid, "s0-new")
        self.assertEqual(api.sessions["s0-new"], {"gid": gid, "order": 0})

        self.emits.clear()
        await api.reconnect_to_game("zzz", gid, "wrong-token")
        self.assertEqual(self.last("error")["data"]["error"], "Neplatny token pre pripojenie.")

    # --- self-contained game_status --------------------------------------

    async def test_game_status_carries_roster_and_round_meta(self):
        gid = await self.make_started_game()
        self.emits.clear()
        await api.game_status("s0")
        data = self.last("game_status")["data"]
        self.assertEqual(data["round_number"], 0)
        self.assertEqual(data["cards_in_round"], 8)
        self.assertEqual(data["series_number"], 0)
        roster = data["players"]
        self.assertEqual([p["order"] for p in roster], [0, 1, 2, 3])
        self.assertEqual([p["name"] for p in roster], ["P0", "P1", "P2", "P3"])
        self.assertTrue(all(p["connected"] for p in roster))

    # --- leave_game -------------------------------------------------------

    async def test_leave_before_start_frees_the_seat(self):
        gid = await self.make_game()
        await api.register_player("s0", gid, "P0")
        await api.register_player("s1", gid, "P1")
        await api.leave_game("s0")  # order 0 leaves
        self.assertNotIn("s0", api.sessions)
        self.assertEqual([p.order for p in api.games[gid].players], [1])
        # the freed seat 0 is reused by the next joiner
        await api.register_player("s2", gid, "P2")
        self.assertEqual(api.sessions["s2"]["order"], 0)

    async def test_leave_last_lobby_player_drops_game(self):
        gid = await self.make_game()
        await api.register_player("s0", gid, "P0")
        await api.leave_game("s0")
        self.assertNotIn(gid, api.games)

    async def test_leave_started_game_keeps_seat_marks_offline(self):
        gid = await self.make_started_game()
        await api.leave_game("s1")
        self.assertNotIn("s1", api.sessions)
        player = api.games[gid].player_by_order(1)
        self.assertIsNotNone(player)          # seat kept for reconnect
        self.assertFalse(player.connected)
        self.assertIn(gid, api.games)         # others still in

    async def test_leave_without_session_is_a_noop(self):
        await api.leave_game("ghost")
        # no exception, and no error emitted to a non-participant
        self.assertEqual(self.events("error"), [])

    # --- disconnect & cleanup --------------------------------------------

    async def test_disconnect_marks_player_then_drops_empty_game(self):
        gid = await self.make_started_game()
        await api.disconnect("s0")
        self.assertFalse(api.games[gid].player_by_sid("s0").connected)
        self.assertNotIn("s0", api.sessions)
        self.assertIn(gid, api.games)  # others still connected

        for i in range(1, 4):
            await api.disconnect(f"s{i}")
        self.assertNotIn(gid, api.games)  # everyone gone -> game removed


if __name__ == "__main__":
    unittest.main()