"""
Android-pyApi 核心基础设施
"""

import os
import sys
import platform
import tempfile
import json
import hashlib
import random
import time
from typing import Any, Dict, List, Optional, Callable


class AndroidOnlyError(Exception):
    """当调用仅 Android 可用的 API 时抛出"""
    pass


class Stub:
    """
    通用 Android API 存根基类。
    子类可以覆盖具体方法实现真实逻辑；
    未覆盖的方法调用会返回合理默认值。
    """

    _android_only = False

    def __init__(self, *args, **kwargs):
        pass

    def __getattr__(self, name: str):
        if name.startswith("_"):
            raise AttributeError(name)

        def _stub_method(*args, **kwargs):
            if self._android_only:
                raise AndroidOnlyError(
                    f"{self.__class__.__name__}.{name}() 仅在 Android 设备上可用"
                )
            return None

        return _stub_method

    def toString(self) -> str:
        return f"{self.__class__.__name__}@{hex(id(self))}"

    def equals(self, other) -> bool:
        return self is other

    def hashCode(self) -> int:
        return hash(self) & 0x7FFFFFFF

    def getClass(self) -> type:
        return self.__class__


# ═══════════════════════════════════════════════════════════════
#  全局路径和环境
# ═══════════════════════════════════════════════════════════════

_package_name = "com.ai.assistance.operit"
_sdcard_root = os.path.join(os.path.expanduser("~"), "Android-compat", "sdcard")
_app_data_dir = os.path.join(os.path.expanduser("~"), "Android-compat", "app-data")


def _ensure_dirs():
    dirs = [
        _sdcard_root,
        os.path.join(_sdcard_root, "Download"),
        os.path.join(_sdcard_root, "DCIM"),
        os.path.join(_sdcard_root, "DCIM", "Screenshots"),
        os.path.join(_sdcard_root, "Documents"),
        os.path.join(_sdcard_root, "Music"),
        os.path.join(_sdcard_root, "Movies"),
        os.path.join(_sdcard_root, "Pictures"),
        os.path.join(_sdcard_root, "Android", "data"),
        os.path.join(_sdcard_root, "Android", "data", _package_name, "files"),
        os.path.join(_sdcard_root, "Android", "data", _package_name, "cache"),
        _app_data_dir,
        os.path.join(_app_data_dir, "files"),
        os.path.join(_app_data_dir, "cache"),
        os.path.join(_app_data_dir, "shared_prefs"),
    ]
    for d in dirs:
        os.makedirs(d, exist_ok=True)


_ensure_dirs()


def resolve_android_path(path: str) -> str:
    """将 Android 路径解析为桌面路径"""
    if path.startswith("/sdcard"):
        return os.path.join(_sdcard_root, path[7:].lstrip("/"))
    if path.startswith("/data/data/"):
        return os.path.join(_app_data_dir, path[11:].lstrip("/"))
    if path.startswith("content://"):
        # 简单解析 content URI
        from urllib.parse import urlparse
        parsed = urlparse(path)
        return parsed.path or path
    if path.startswith("file://"):
        from urllib.parse import unquote
        return unquote(path[7:])
    return path


def to_android_path(desktop_path: str) -> str:
    """将桌面路径映射回 Android 路径"""
    if desktop_path.startswith(_sdcard_root):
        rel = os.path.relpath(desktop_path, _sdcard_root)
        return f"/sdcard/{rel}"
    if desktop_path.startswith(_app_data_dir):
        rel = os.path.relpath(desktop_path, _app_data_dir)
        return f"/data/data/{_package_name}/{rel}"
    return desktop_path


# ═══════════════════════════════════════════════════════════════
#  全局 Context 单例
# ═══════════════════════════════════════════════════════════════

class _GlobalContext:
    """全局应用上下文占位符，在 android.content 模块中被替换为真实 Context"""

    @property
    def packageName(self):
        return _package_name

    def getPackageName(self):
        return _package_name

    def getFilesDir(self):
        return os.path.join(_app_data_dir, "files")

    def getCacheDir(self):
        return os.path.join(_app_data_dir, "cache")

    def getExternalFilesDir(self, type_=None):
        base = os.path.join(_sdcard_root, "Android", "data", _package_name, "files")
        if type_:
            base = os.path.join(base, type_)
        os.makedirs(base, exist_ok=True)
        return base

    def getExternalStorageDirectory(self):
        return _sdcard_root

    def getSystemService(self, name):
        return None  # 由具体模块填充


android_context = _GlobalContext()


def get_context():
    """获取全局 Android Context"""
    return android_context


# ═══════════════════════════════════════════════════════════════
#  可选依赖检测
# ═══════════════════════════════════════════════════════════════

def _check_optional(name: str) -> bool:
    """检查可选依赖是否可用"""
    try:
        __import__(name)
        return True
    except ImportError:
        return False


HAS_PIL = _check_optional("PIL")
HAS_REQUESTS = _check_optional("requests")
HAS_HTTPX = _check_optional("httpx")
HAS_PYAUTOGUI = _check_optional("pyautogui")
HAS_SCREENINFO = _check_optional("screeninfo")
HAS_PSUTIL = _check_optional("psutil")
HAS_PYMUPDF = _check_optional("fitz")
HAS_PDF2IMAGE = _check_optional("pdf2image")
HAS_CRYPTOGRAPHY = _check_optional("cryptography")
HAS_PYPERCLIP = _check_optional("pyperclip")
HAS_JPYPE = _check_optional("jpype")