"""Tests para cdp_click_xy — mockean urlopen + create_connection.

Mockean la capa de red de CDP: urllib.request.urlopen (lista de targets) y
websocket.create_connection (un fake que captura los mensajes enviados y devuelve
las respuestas CDP con el id correspondiente).
"""

import json
import os
import sys
from contextlib import contextmanager

sys.path.insert(0, os.path.join(os.path.dirname(__file__), ".."))

from browser import cdp_click_xy as mod  # noqa: E402
from browser.cdp_click_xy import cdp_click_xy  # noqa: E402


class _FakeResp:
    """Context manager que imita la respuesta de urllib.request.urlopen."""

    def __init__(self, payload: list):
        self._payload = payload

    def __enter__(self):
        return self

    def __exit__(self, *exc):
        return False

    def read(self):
        return json.dumps(self._payload).encode()


class _FakeWS:
    """WebSocket falso: captura los mensajes enviados y responde por id."""

    def __init__(self):
        self.sent = []
        self._inbox = []
        self.closed = False

    def send(self, raw: str):
        msg = json.loads(raw)
        self.sent.append(msg)
        # Encola una respuesta CDP vacia con el mismo id (como Chrome devuelve).
        self._inbox.append(json.dumps({"id": msg["id"], "result": {}}))

    def recv(self):
        if self._inbox:
            return self._inbox.pop(0)
        return ""

    def close(self):
        self.closed = True


@contextmanager
def _patch(targets, ws_obj=None, urlopen_exc=None, create_conn_exc=None):
    """Parchea urlopen y create_connection del modulo. Restaura al salir."""
    orig_urlopen = mod.urllib.request.urlopen
    orig_create = mod.websocket.create_connection

    def fake_urlopen(url, timeout=5):
        if urlopen_exc is not None:
            raise urlopen_exc
        return _FakeResp(targets)

    def fake_create(ws_url, timeout=10):
        if create_conn_exc is not None:
            raise create_conn_exc
        return ws_obj

    mod.urllib.request.urlopen = fake_urlopen
    mod.websocket.create_connection = fake_create
    try:
        yield
    finally:
        mod.urllib.request.urlopen = orig_urlopen
        mod.websocket.create_connection = orig_create


_TARGETS = [
    {"type": "page", "url": "https://web.whatsapp.com/", "webSocketDebuggerUrl": "ws://x/1"},
]


def test_golden_click_emite_movido_pressed_released_left():
    """Click en (100, 200) emite mouseMoved + mousePressed + mouseReleased correctos."""
    ws = _FakeWS()
    with _patch(_TARGETS, ws_obj=ws):
        res = cdp_click_xy(100, 200, target_url_substr="whatsapp")

    assert res == {"ok": True, "error": "", "x": 100, "y": 200}
    assert len(ws.sent) == 3

    moved, pressed, released = ws.sent

    assert moved["method"] == "Input.dispatchMouseEvent"
    assert moved["params"]["type"] == "mouseMoved"
    assert moved["params"]["x"] == 100
    assert moved["params"]["y"] == 200

    assert pressed["params"]["type"] == "mousePressed"
    assert pressed["params"]["x"] == 100
    assert pressed["params"]["y"] == 200
    assert pressed["params"]["button"] == "left"
    assert pressed["params"]["buttons"] == 1
    assert pressed["params"]["clickCount"] == 1

    assert released["params"]["type"] == "mouseReleased"
    assert released["params"]["x"] == 100
    assert released["params"]["y"] == 200
    assert released["params"]["button"] == "left"
    assert released["params"]["buttons"] == 1
    assert released["params"]["clickCount"] == 1

    assert ws.closed is True


def test_edge_move_first_false_omite_mousemoved():
    """Con move_first=False no se emite el mouseMoved previo, solo press + release."""
    ws = _FakeWS()
    with _patch(_TARGETS, ws_obj=ws):
        res = cdp_click_xy(50, 60, target_url_substr="whatsapp", move_first=False)

    assert res["ok"] is True
    assert len(ws.sent) == 2

    types = [m["params"]["type"] for m in ws.sent]
    assert types == ["mousePressed", "mouseReleased"]
    assert all(m["params"]["type"] != "mouseMoved" for m in ws.sent)


def test_error_create_connection_lanza_ok_false():
    """Si create_connection lanza, se captura y devuelve ok=False sin relanzar."""
    with _patch(_TARGETS, create_conn_exc=ConnectionRefusedError("ws down")):
        res = cdp_click_xy(10, 20, target_url_substr="whatsapp")

    assert res["ok"] is False
    assert "ws down" in res["error"]
    assert res["x"] == 10
    assert res["y"] == 20