# -*- coding: utf-8 -*-
"""找出 MainActivity 里**定义了但没人调用**的私有方法。

为什么需要这个：2.3.0 把一半的分页删了，原来那些按钮背后的方法
就全变成孤儿了。一个个跑测试太慢，先用这个脚本一次性列出来。

排除规则（这些"没人调用"是正常的）：
  * @Override 的回调（框架会调）
  * 生命周期方法（onCreate/onPause/...）
  * 构造器
  * 只有 setVisibility / setText 之类直接操作的不算
"""
from __future__ import annotations

import re
import sys
from pathlib import Path

JAVA = (Path(__file__).resolve().parent.parent
        / "android" / "src" / "com" / "lanremote" / "watch" / "MainActivity.java")

# 框架调用的，不算孤儿
LIFECYCLE = {
    "onCreate", "onStart", "onResume", "onPause", "onStop", "onDestroy",
    "onActivityResult", "onRequestPermissionsResult", "onBackPressed",
    "onNewIntent", "onSaveInstanceState", "onRestoreInstanceState",
    "onTouchEvent", "onKeyDown", "onConfigurationChanged",
    "onWindowFocusChanged", "onCreateOptionsMenu", "onOptionsItemSelected",
    "onClick", "run", "onPrepared", "onCompletion", "onError",
    "onProgressChanged", "onStartTrackingTouch", "onStopTrackingTouch",
    "onSingleTapConfirmed", "onDoubleTap", "onScroll", "onFling",
    "onDown", "onLongPress", "onShowPress", "onSingleTapUp",
    "onInput", "onPick", "onResponse", "onFailure", "doInBackground",
    "onPostExecute", "beforeTextChanged", "onTextChanged",
    "afterTextChanged", "onItemClick", "onItemSelected",
    "onNothingSelected", "onFocusChange", "onEditorAction",
}

# 定义方法的各种写法
DEF_RE = re.compile(
    r"^[ \t]*(?:@\w+(?:\([^)]*\))?\s*)*"
    r"(?:private|protected|public|static|final|synchronized|\s)*"
    r"(?:[\w<>\[\],.?\s]+?)\s+(\w+)\s*\([^)]*\)\s*(?:throws [\w,.\s]+)?\s*\{",
    re.M)


def main() -> int:
    text = JAVA.read_text(encoding="utf-8")
    lines = text.split("\n")

    # 收集定义（带行号）
    defs = []
    for i, ln in enumerate(lines):
        m = DEF_RE.match(ln)
        if not m:
            continue
        name = m.group(1)
        # 排除构造器（名字等于类名）和 exclude 集合
        if name in ("MainActivity", "if", "for", "while", "switch", "catch"):
            continue
        # 排除紧跟在 @Override 后面的
        prev = [x.strip() for x in lines[max(0, i - 3):i]]
        if any("_override_" == p or "@Override" in p for p in prev):
            continue
        defs.append((name, i + 1))

    # 统计每个名字被调用多少次（排除定义行自己）
    def_line = {}
    for name, ln in defs:
        def_line.setdefault(name, set()).add(ln)

    orphans = []
    for name, ln in defs:
        # 统计调用次数：名字 + "(" 出现次数
        occurrences = [(i + 1, l) for i, l in enumerate(lines)
                       if re.search(r"\b" + re.escape(name) + r"\s*\(", l)]
        # 减去定义本身那一行
        calls = [o for o in occurrences if o[0] != ln]
        # 定义行可能是多行签名的第一行，精确匹配名字出现的所有行
        if not calls:
            if name not in LIFECYCLE:
                orphans.append((name, ln))

    print("  定义的方法 %d 个" % len(defs))
    print("  孤儿方法 %d 个：" % len(orphans))
    for name, ln in orphans:
        print("    第 %-5d %s()" % (ln, name))

    # 也检查被调用但只出现在注释里的（可能是残留引用）
    print()
    print("  被删除后仍被引用的符号（编译错误来源）：")
    deleted = sys.argv[1:] if len(sys.argv) > 1 else []
    for sym in deleted:
        hits = [(i + 1, l.strip()) for i, l in enumerate(lines)
                if re.search(r"\b" + re.escape(sym) + r"\s*\(", l)]
        if hits:
            # 判断是不是定义行
            deflines = {d[1] for d in defs if d[0] == sym}
            real = [h for h in hits if h[0] not in deflines]
            if real:
                print("    %s: %d 处调用" % (sym, len(real)))
                for ln, l in real[:5]:
                    print("      第 %d: %s" % (ln, l[:100]))
    return 0


if __name__ == "__main__":
    sys.exit(main())