#!/usr/bin/env python3
"""Headless browser check of the 3D viewer (Task 6, V11).
Needs Playwright + Chromium and the viewer/model served over HTTP, e.g.
  python3 -m http.server 8765   (from Code/3d-drawing)
  python3 verify_viewer_headless.py http://127.0.0.1:8765/viewer/index.html <chromium_path>
Checks: page loads without page errors, canvas exists, meta text is shown,
and a click on the lining (other layers hidden) returns station and pattern.
"""
import sys
from playwright.sync_api import sync_playwright

URL, CHROME = sys.argv[1], sys.argv[2]
with sync_playwright() as p:
    b = p.chromium.launch(executable_path=CHROME, args=["--use-gl=swiftshader", "--enable-webgl", "--ignore-gpu-blocklist", "--no-sandbox"])
    pg = b.new_page(viewport={"width": 1280, "height": 800})
    errors = []
    pg.on("pageerror", lambda e: errors.append(str(e)))
    pg.goto(URL, wait_until="networkidle", timeout=90000)
    pg.wait_for_timeout(6000)
    canvas = pg.evaluate("() => !!document.querySelector('canvas')")
    body = pg.evaluate("() => document.body.innerText")
    print("page errors:", errors)
    print("canvas present:", canvas, "| meta shown:", "패턴:" in body and "범위:" in body)
    for label in ["excavation_R7402", "road_surface", "ground_GL"]:
        pg.locator("label", has_text=label).locator("input").uncheck()
    pg.wait_for_timeout(500)
    readout = None
    for fx in [0.5, 0.45, 0.55, 0.4, 0.6, 0.35, 0.65]:
        for fy in [0.5, 0.45, 0.55, 0.4, 0.6]:
            pg.mouse.click(1280 * fx, 800 * fy)
            pg.wait_for_timeout(200)
            t = pg.evaluate("() => { const els=[...document.querySelectorAll('div,pre,p')]; return els.map(e=>e.innerText).filter(s=>s && s.includes('교차점')).pop()||null }")
            if t and "측점" in t:
                readout = t
                break
        if readout:
            break
    print("lining readout:", (readout or "NO LINING HIT").replace("\n", " | ")[:700])
    b.close()