# -*- coding: utf-8 -*-
"""对 B 类（同名不同内容）细分：b1 同主题旧版本 / b2 同名不同主题（高危，删除即丢失）。"""
import json, os, re

ROOT = r"D:\资料\03-项目开发\wecom_it_smart_desk\docs"
data = json.load(open(r"D:\资料\03-项目开发\wecom_it_smart_desk\docs_cmp_result2.json", encoding="utf-8"))

TEXT_EXT = {".md", ".mermaid", ".txt", ".json", ".py", ".conf", ".yml", ".yaml"}

def first_title(p):
    ext = os.path.splitext(p)[1].lower()
    if ext not in TEXT_EXT:
        return None
    try:
        with open(p, encoding="utf-8", errors="ignore") as f:
            for _ in range(12):
                line = f.readline()
                if not line:
                    break
                s = line.strip().lstrip("#%").strip()
                if s and not s.startswith(("```", "---", ">")):
                    return s[:60]
    except Exception:
        pass
    return None

b1, b2, unknown = [], [], []
for row in data["name_diff"]:
    oldrel, _, osz, newrel, _, nsz = row
    op = os.path.join(ROOT, oldrel)
    np_ = os.path.join(ROOT, newrel)
    ot, nt = first_title(op), first_title(np_)
    if ot is None or nt is None:
        unknown.append((oldrel, newrel, osz, nsz))
    elif ot == nt:
        b1.append((oldrel, newrel, osz, nsz, ot))
    else:
        b2.append((oldrel, newrel, ot, nt, osz, nsz))

print(f"B 类合计 {len(data['name_diff'])}")
print(f"  b1 同名同主题（新结构为演进版，旧版可删）: {len(b1)}")
print(f"  b2 同名【不同主题】（⚠ 删除即丢失，必须改名抢救）: {len(b2)}")
print(f"  b3 无法自动判定（二进制/无标题）: {len(unknown)}")

print("\n===== ⚠ b2 高危：同名不同主题 =====")
for oldrel, newrel, ot, nt, osz, nsz in b2:
    print(f" 旧 {oldrel}  [{osz/1024:.1f}KB]\n    主题: {ot}")
    print(f" 新 {newrel}  [{nsz/1024:.1f}KB]\n    主题: {nt}\n")

print("===== b1 同主题（新版通常更大=演进版） =====")
for oldrel, newrel, osz, nsz, t in b1:
    mark = "新更大" if nsz > osz else ("旧更大⚠" if osz > nsz else "等大")
    print(f" - {oldrel}  旧{osz/1024:.1f}KB / 新{nsz/1024:.1f}KB  {mark}")

if unknown:
    print("\n===== b3 需人工看 =====")
    for oldrel, newrel, osz, nsz in unknown:
        print(f" - {oldrel} [{osz/1024:.1f}KB] <-> {newrel} [{nsz/1024:.1f}KB]")

json.dump({"b1": b1, "b2": b2, "b3": unknown},
          open(r"D:\资料\03-项目开发\wecom_it_smart_desk\docs_cmp_result3.json", "w", encoding="utf-8"),
          ensure_ascii=False, indent=1)