# -*- coding: utf-8 -*-
"""Verify GUI fix: /show resizes host window to panel rect, stays offscreen, not topmost."""
import ctypes, time, subprocess, os, threading, json
from ctypes import wintypes
import urllib.request

EXE = r"C:\Users\locpham\SonicForgeStudio\native_bridge\build\Release\fx_vst_bridge.exe"
JOB = r"C:\Users\locpham\AppData\Local\Temp\test_gui_WaveObserver.vst3.json"
CLASS = b"SonicForge_FX_GUI_Class"

user32 = ctypes.WinDLL("user32", use_last_error=True)
user32.GetWindowRect.argtypes = [wintypes.HWND, ctypes.POINTER(wintypes.RECT)]
user32.IsWindowVisible.restype = ctypes.c_int
user32.GetWindowLongW.restype = ctypes.c_long
user32.GetWindowLongW.argtypes = [wintypes.HWND, ctypes.c_int]
user32.GetWindowThreadProcessId.argtypes = [wintypes.HWND, ctypes.POINTER(wintypes.DWORD)]
user32.GetClassNameA.argtypes = [wintypes.HWND, ctypes.c_char_p, ctypes.c_int]
GWL_EXSTYLE = -20

def find_own_windows(pid):
    out = []
    WNDENUMPROC = ctypes.WINFUNCTYPE(ctypes.c_bool, wintypes.HWND, wintypes.LPARAM)
    @WNDENUMPROC
    def cb(hwnd, lp):
        t = wintypes.DWORD()
        user32.GetWindowThreadProcessId(hwnd, ctypes.byref(t))
        if t.value == pid: out.append(hwnd)
        return True
    user32.EnumWindows(cb, 0)
    return out

def http(method, url, body=None):
    req = urllib.request.Request(url, method=method,
                                 data=body.encode() if body else None,
                                 headers={"Content-Type": "application/json"})
    with urllib.request.urlopen(req, timeout=10) as r:
        return r.read()

proc = subprocess.Popen([EXE, "--fx-gui", JOB], stdout=subprocess.PIPE,
                        stderr=subprocess.STDOUT, text=True,
                        env=dict(os.environ, SF_PARENT_PID=str(os.getpid())),
                        creationflags=subprocess.CREATE_NO_WINDOW)
lines = []
def reader():
    for line in proc.stdout: lines.append(line.rstrip())
threading.Thread(target=reader, daemon=True).start()

def rect_str(h):
    r = wintypes.RECT(); user32.GetWindowRect(h, ctypes.byref(r))
    ex = user32.GetWindowLongW(h, GWL_EXSTYLE)
    return "L%d T%d R%d B%d W%d H%d vis=%d ex=0x%X topmost=%d" % (
        r.left, r.top, r.right, r.bottom, r.right-r.left, r.bottom-r.top,
        user32.IsWindowVisible(h), ex, bool(ex & 0x8))

try:
    port = None
    t0 = time.time()
    while time.time() - t0 < 20:
        for l in lines:
            if l.startswith("SF_FXGUI_PORT="):
                port = int(l.split("=", 1)[1]); break
        if port: break
        time.sleep(0.1)
    base = f"http://127.0.0.1:{port}"
    t0 = time.time()
    while time.time() - t0 < 25:
        if any("editor open" in l for l in lines): break
        time.sleep(0.2)
    hwnd = None
    for h in find_own_windows(proc.pid):
        buf = ctypes.create_string_buffer(256)
        user32.GetClassNameA(h, buf, 256)
        if buf.value == CLASS:
            hwnd = h; break
    assert hwnd, "fx-gui window not found in own process"
    print("fx-gui hwnd:", hwnd)
    print("before /show:", rect_str(hwnd))
    # /show with panel rect -> resize host window to panel, stay offscreen, no topmost
    http("POST", base + "/show", json.dumps({"rect": {"x": 300, "y": 200, "w": 640, "h": 480}}))
    time.sleep(1.0)
    print("after  /show:", rect_str(hwnd))
    r = wintypes.RECT(); user32.GetWindowRect(hwnd, ctypes.byref(r))
    w, h = r.right-r.left, r.bottom-r.top
    assert r.left == -20000 and r.top == -20000, "window not offscreen!"
    assert not (user32.GetWindowLongW(hwnd, GWL_EXSTYLE) & 0x8), "window topmost!"
    assert (w, h) != (800, 600), "host window still default 800x600 — resize not applied"
    print("RESIZE applied: host window now %dx%d (was default 800x600)" % (w, h))
    fr = http("GET", base + "/frame")
    print("frame size after /show+resize:", len(fr))
    assert len(fr) > 1000, "capture broken after /show"
    print("ALL CHECKS PASSED")
finally:
    proc.terminate()
    try: proc.wait(timeout=5)
    except Exception: proc.kill()
    print("cleanup done")