"""只读诊断：为什么 _input_editor_looks_blank() 认不出空输入框。"""

import os
import sys

sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

import numpy as np
from PIL import Image, ImageDraw

import wechat_bot as bot_module

_HERE = os.path.dirname(os.path.abspath(__file__))


def main():
    bot = bot_module.WeChatBot()
    bot.safe_window_mode = True
    bot.auto_activate_window = True
    if not bot.connect(activate=False, wait_if_missing=False):
        print("[-] 未挂载到企业微信窗口")
        return
    print(f"_ensure_visible(): {bot._ensure_visible()}")
    full = bot._capture_full_window()
    bot._refresh_message_geometry(full)
    full = bot._capture_full_window()

    scale = max(0.75, float(getattr(bot, "scale", 1.0) or 1.0))
    height, width = full.shape[:2]
    print(f"窗口画面      : {width}x{height}  scale={scale}")
    print(f"_composer_geometry_valid: {getattr(bot, '_composer_geometry_valid', None)}")
    print(f"_composer_rel_top       : {getattr(bot, '_composer_rel_top', None)}")
    print(f"_editor_rel_top         : {getattr(bot, '_editor_rel_top', None)}")
    print(f"输入框点击点(屏幕)      : ({bot.input_x}, {bot.input_y})")
    print(f"输入框点击点(窗口内)    : ({bot.input_x - bot.L}, {bot.input_y - bot.T})")

    x1 = max(0, int(bot._list_x + bot._list_w + 16 * scale))
    x2 = min(width, width - int(160 * scale))
    y1 = max(0, int(getattr(bot, "_composer_rel_top", height)) + int(42 * scale))
    y2 = min(height, height - int(10 * scale))
    print(f"编辑区采样框  : x {x1}~{x2}  y {y1}~{y2}  ({x2 - x1}x{y2 - y1})")

    body = full[y1:y2, x1:x2, :3].astype(np.int16)
    background = np.median(body.reshape(-1, body.shape[2]), axis=0)
    active = np.max(np.abs(body - background), axis=2) >= 18
    active_columns = int(active.any(axis=0).sum())
    limit = max(4, int(np.ceil(3.5 * scale)))
    print(f"背景中位色    : {background.tolist()}")
    print(f"活跃列数      : {active_columns}   阈值 <= {limit}")
    print(f"判定          : {'空' if active_columns <= limit else '非空（会被当成人工草稿/焦点不明）'}")
    print(f"_input_editor_looks_blank(): {bot._input_editor_looks_blank()}")

    cols = np.flatnonzero(active.any(axis=0))
    if cols.size:
        print(f"活跃列窗口内 x 范围: {x1 + int(cols.min())} ~ {x1 + int(cols.max())}")
        rows = np.flatnonzero(active.any(axis=1))
        print(f"活跃行窗口内 y 范围: {y1 + int(rows.min())} ~ {y1 + int(rows.max())}")

    crop = Image.fromarray(full[y1:y2, x1:x2, :3][:, :, ::-1])
    crop.save(os.path.join(_HERE, "input_editor_crop.png"))
    marked = Image.fromarray(full[:, :, :3][:, :, ::-1])
    draw = ImageDraw.Draw(marked)
    draw.rectangle([x1, y1, x2, y2], outline=(255, 0, 0), width=4)
    marked.save(os.path.join(_HERE, "input_editor_probe.png"))
    print("采样区裁剪图: tmp/input_editor_crop.png")
    print("整窗标注图  : tmp/input_editor_probe.png")


if __name__ == "__main__":
    main()