"""Only click a freshly checked, fully painted expand control."""
import json
import subprocess
from pathlib import Path
from types import SimpleNamespace

import pytest

from backend.browser import tools


FIXTURE = Path(__file__).with_name('reply_dom_fixture_d41.cjs')


def tree(*, clipped=False, viewport_edge=False):
    control = {'attrs': {'id':'expand','class':'show-more'}, 'text':'展开1条回复'}
    if viewport_edge:
        control['rect'] = {'left':0,'right':100,'top':585,'bottom':620,'width':100,'height':35}
    area = {'attrs': {'id':'reply-area','class':'reply-container'}, 'children':[control]}
    if clipped:
        area['style'] = {'overflowY':'auto'}
        area['rect'] = {'left':0,'right':300,'top':0,'bottom':40,'width':300,'height':40}
    root = {'attrs': {'id':'root-comment','class':'comment-item'}, 'children':[
        {'attrs': {'id':'root-content','class':'content'},'text':'根评论'}]}
    return {'attrs': {'id':'noteContainer'}, 'children':[
        {'attrs': {'id':'detail-desc'},'text':'正文'},
        {'attrs': {'id':'thread','class':'parent-comment'},'children':[root,area]}]}


def observe(code, arg, value):
    result = subprocess.run(['node',str(FIXTURE)], input=json.dumps({'code':code,'arg':arg,'tree':value}),
                            capture_output=True,text=True,check=True,timeout=5)
    return json.loads(result.stdout)


@pytest.mark.parametrize('options', [{'clipped':True},{'viewport_edge':True}])
def test_partial_control_can_use_an_actually_painted_point_without_implicit_scroll(options):
    value = tree(**options)
    inspected = observe(tools._INSPECT_SOURCE_CANDIDATES, {'max_comments':5}, value)
    assert inspected['reply_controls'][0]['in_view'] is True
    checked = observe(tools._OBSERVE_REPLY_CONTROL, {'selector':'#expand'}, value)
    assert checked['click_point']['y'] < (600 if options.get('viewport_edge') else 40)


def test_full_control_has_a_program_observed_native_point():
    result = observe(tools._OBSERVE_REPLY_CONTROL, {'selector':'#expand'}, tree())
    assert result['click_point'] == {'x':150,'y':27,'viewport_width':400,'viewport_height':600}


def test_real_occlusion_is_rejected_by_paint_hit_testing():
    value=tree();value['occluded']=True
    result=observe(tools._OBSERVE_REPLY_CONTROL,{'selector':'#expand'},value)
    assert result['error']=='reply_control_occluded'


async def test_changed_control_is_not_clicked_after_reading_candidates(tmp_path,monkeypatch):
    tid = 'current-visible-point-d42'
    tools.clear_task_context(tid)
    tools.set_prospecting_context(tid)
    monkeypatch.setattr(tools,'task_doc_dir',lambda _:tmp_path)
    class Page:
        observed = 0
        clicks = 0
        async def get_url(self):return 'https://www.xiaohongshu.com/explore/'+'a'*24
        async def evaluate(self,code,arg=None):
            if code==tools._OBSERVE_REPLY_CONTROL:
                self.observed+=1
                return {'url':await self.get_url(),'fingerprint':str(self.observed),'owner_identity':'stable-root',
                        'owner_selector':'#thread','reply_count':0,'visible_reply_selectors':[],
                        'reply_snapshot_complete':True,'click_point':{'x':150,'y':27,'viewport_width':400,'viewport_height':600}}
            assert code==tools._INSPECT_SOURCE_CANDIDATES
            return {'url':await self.get_url(),'candidates':[]}
        async def get_elements_by_css_selector(self,_selector):return [SimpleNamespace()]
        @property
        async def mouse(self):
            async def click(**_point):self.clicks+=1
            return SimpleNamespace(click=click)
    page=Page()
    async def current():return page
    with pytest.raises(ValueError,match='点击前回复入口或讨论已变化'):
        await tools._expand_replies(tid,SimpleNamespace(get_current_page=current),'#expand')
    assert page.clicks==0
    tools.clear_task_context(tid)