"""验证 _scroll_session_list_page 的滚动到底检测修复"""
import sys, os
SCRIPT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
sys.path.insert(0, SCRIPT_DIR)

import numpy as np
from wechat_bot import WeChatBot

# 构造最小 bot 对象（不需要真实窗口）
bot = WeChatBot.__new__(WeChatBot)
bot.session_item_h = 72
bot.scale = 1.0

# 构造有纹理的页面（模拟会话列表）
def make_page(h=200, w=300, seed=0):
    rng = np.random.default_rng(seed)
    page = rng.integers(180, 220, size=(h, w, 3), dtype=np.uint8)
    # 添加一些"头像"和"文字"区域，增加 informative 像素
    page[20:60, 20:80] = rng.integers(80, 160, size=(40, 60, 3), dtype=np.uint8)
    page[80:120, 20:200] = rng.integers(80, 160, size=(40, 180, 3), dtype=np.uint8)
    return page

a = make_page(seed=1)
b = a.copy()

# shift=0 应该返回 True（内容完全相同）
assert bot._session_pages_overlap_at_shift(a, b, 0) is True, "shift=0 同页应返回 True"

# 微小差异（模拟时间戳变化，1% 区域不同）
b2 = a.copy()
b2[10:20, 10:30] = 255
# shift=0 时，差异区域可能导致覆盖率 <90%，返回 False
overlap0 = bot._session_pages_overlap_at_shift(a, b2, 0)
assert isinstance(overlap0, bool), "应返回 bool"

# --- 测试 _any_scroll_overlap ---
# 完全相同的页面 -> 任何 shift 都匹配
assert bot._any_scroll_overlap(a, b) is True, "同页应返回 True"

# 模拟滚动 1 行（72px）
scrolled = np.zeros((200, 300, 3), dtype=np.uint8)
scrolled[:-72] = a[72:]
scrolled[-72:] = 128
overlap = bot._any_scroll_overlap(a, scrolled)
# 如果滚动 72px 确实存在重叠，应返回 True
print(f"[INFO] 滚动 72px 重叠检测: {overlap}")

# --- 测试 _scroll_session_list_page 的签名+重叠双重检测 ---
# 模拟时间戳微差（真实场景：时间戳只占右上角很小区域，颜色差异不大）
a_ts = make_page(seed=3)
b_ts = a_ts.copy()
# 模拟右上角时间戳从 "14:51" 变为 "14:52"，只影响 12x40 区域，颜色差异小
b_ts[8:20, 240:280] = np.clip(b_ts[8:20, 240:280].astype(np.int16) + 15, 0, 255).astype(np.uint8)

sig_a = bot._session_page_signature(a_ts)
sig_b = bot._session_page_signature(b_ts)
print(f"[INFO] 时间戳微差时签名相同: {sig_a == sig_b}")

if sig_a != sig_b:
    any_overlap = bot._any_scroll_overlap(a_ts, b_ts)
    print(f"[INFO] 签名不同但 _any_scroll_overlap: {any_overlap}")
    if any_overlap:
        print("[PASS] 修复有效：时间戳微差导致签名不同但无有效滚动时，会返回 None")
    else:
        print("[INFO] 时间戳差异被识别为有意义变化；继续检查滚动检测是否仍有效...")
        # 如果页面确实滚动了一行，应仍被识别为有效滚动
        scrolled_ts = np.zeros_like(a_ts)
        scrolled_ts[:-72] = a_ts[72:]
        scrolled_ts[-72:] = 128
        scroll_overlap = bot._any_scroll_overlap(a_ts, scrolled_ts)
        print(f"[INFO] 滚动 72px 时 _any_scroll_overlap: {scroll_overlap}")
        if scroll_overlap:
            print("[PASS] 滚动检测仍有效：真实滚动被识别为有效滚动")
else:
    print("[PASS] 时间戳微差未影响签名，无需修复")