import html
import json
import os
import re
import subprocess
import time
from pathlib import Path

from server.services.device import DeviceProfile

PACKAGE = "com.leivideo.raptdrama"
PREFS = f"/data/data/{PACKAGE}/shared_prefs/FlutterSharedPreferences.xml"
REPO_ROOT = Path(__file__).resolve().parents[2]


class Adb:
    def __init__(self, executable: str) -> None:
        self.executable = executable

    @classmethod
    def locate(cls, explicit: str = "") -> "Adb":
        if explicit:
            if not os.path.isfile(explicit):
                raise RuntimeError(f"找不到 adb：{explicit}")
            return cls(explicit)
        name = "adb.exe" if os.name == "nt" else "adb"
        path = REPO_ROOT / "tools" / "platform-tools" / name
        if not path.is_file():
            raise RuntimeError(f"项目内没有 adb：{path}")
        return cls(str(path))

    def list_devices(self) -> list[dict]:
        proc = self._run(["devices", "-l"])
        if proc.returncode not in (0, None):
            err = proc.stderr.decode("utf-8", "replace").strip() or "adb devices 失败"
            raise RuntimeError(err)
        items = []
        for line in proc.stdout.decode("utf-8", "replace").splitlines()[1:]:
            parts = line.split()
            if len(parts) < 2 or parts[1] not in ("device", "unauthorized", "offline"):
                continue
            serial, state = parts[0], parts[1]
            model = ""
            for part in parts[2:]:
                if part.startswith("model:"):
                    model = part.split(":", 1)[1].replace("_", " ")
            if state == "device" and not model:
                _, text, _ = self._shell(serial, ["getprop", "ro.product.model"], timeout=8)
                model = text.strip()
            items.append({
                "serial": serial,
                "model": model or "未知型号",
                "rooted": self._rooted(serial) if state == "device" else False,
                "state": state,
            })
        return items

    def read_profile(self, serial: str) -> DeviceProfile:
        serial = self._ready(serial)
        profile = DeviceProfile.builtin()
        brand = self._prop(serial, "ro.product.brand") or self._prop(serial, "ro.product.manufacturer")
        model = self._prop(serial, "ro.product.model")
        os_version = self._prop(serial, "ro.build.version.release")
        characteristics = self._prop(serial, "ro.build.characteristics")
        qemu = self._prop(serial, "ro.kernel.qemu") or self._prop(serial, "ro.boot.qemu")
        _, android_id, err = self._shell(serial, ["settings", "get", "secure", "android_id"], timeout=8)
        if err == "timeout":
            raise RuntimeError("读取设备信息超时，请确认设备仍连接后重试。")
        android_id = android_id.strip()
        version_name, version_code = self._app_version(serial)
        if brand:
            profile.brand = brand
        if model:
            profile.model = model
        if os_version:
            profile.os_version = os_version
        if version_name:
            profile.app_version = version_name
        if version_code:
            profile.app_build = version_code
        if android_id and android_id.lower() != "null":
            profile.device_id = f"rd_{android_id}"
        profile.device_type = "pad" if "tablet" in characteristics else "phone"
        profile.physical = not (qemu == "1" or serial.startswith("emulator-"))
        return profile

    def read_token(self, serial: str) -> str:
        serial = self._ready(serial)
        if not self._app_installed(serial):
            raise RuntimeError("这台设备还没有安装 RaptDrama。请先安装 App 并登录，然后再读取登录信息。")
        text = self._prefs(serial)
        match = re.search(r'name="flutter\.user_data"[^>]*>(.*?)</string>', text, re.S)
        if not match:
            raise RuntimeError("登录信息里没有 user_data，请先在 App 里登录")
        user = json.loads(html.unescape(match.group(1)))
        token = user.get("accessToken") or ""
        if not token:
            raise RuntimeError("当前账号没有 accessToken，请先在 App 里登录")
        return token

    def _ready(self, serial: str) -> str:
        serial = (serial or "").strip()
        if ":" in serial:
            self._run(["connect", serial], timeout=15)
        ready = self._ready_serials()
        if serial not in ready:
            shown = "、".join(ready) or "无"
            raise RuntimeError(f"设备 {serial} 未就绪。当前已连接：{shown}")
        return serial

    def _ready_serials(self) -> list[str]:
        proc = self._run(["devices"])
        serials = []
        for line in proc.stdout.decode("utf-8", "replace").splitlines()[1:]:
            parts = line.split()
            if len(parts) >= 2 and parts[1] == "device":
                serials.append(parts[0])
        return serials

    def _app_installed(self, serial: str) -> bool:
        _, text, err = self._shell(serial, ["pm", "path", PACKAGE], timeout=8)
        if err == "timeout":
            raise RuntimeError("检查 App 是否安装超时，请确认设备仍连接后重试。")
        return "package:" in text

    def _app_version(self, serial: str) -> tuple[str, str]:
        _, text, _ = self._shell(serial, ["dumpsys", "package", PACKAGE], timeout=15)
        version_name = ""
        version_code = ""
        for line in text.splitlines():
            line = line.strip()
            if line.startswith("versionName="):
                version_name = line.split("=", 1)[1].strip()
            elif line.startswith("versionCode="):
                version_code = line.split("=", 1)[1].split()[0]
        return version_name, version_code

    def _prop(self, serial: str, name: str) -> str:
        _, text, err = self._shell(serial, ["getprop", name], timeout=8)
        if err == "timeout":
            raise RuntimeError("读取设备信息超时，请确认设备仍连接后重试。")
        return text.strip()

    def _rooted(self, serial: str) -> bool:
        _, text, _ = self._shell(serial, ["id"], timeout=5)
        if "uid=0" in text:
            return True
        for args in (["su", "-c", "id"], ["su", "0", "id"]):
            _, text, _ = self._shell(serial, args, timeout=4)
            if "uid=0" in text:
                return True
        return False

    def _prefs(self, serial: str) -> str:
        def usable(text: str) -> bool:
            return "flutter.user_data" in text

        _, text, _ = self._shell(serial, ["cat", PREFS])
        if usable(text):
            return text
        self._run(["-s", serial, "root"], timeout=15)
        if ":" in serial:
            self._run(["connect", serial], timeout=15)
        for _ in range(10):
            time.sleep(0.5)
            _, text, _ = self._shell(serial, ["cat", PREFS])
            if usable(text):
                return text
        for args in (["su", "-c", f"cat {PREFS}"], ["su", "0", "cat", PREFS]):
            _, text, _ = self._shell(serial, args, timeout=8)
            if usable(text):
                return text
        raise RuntimeError(
            "读不到应用私有目录。未 root 的设备无法获取登录信息。"
            "请使用已 root 的手机，或带 root 的模拟器。"
        )

    def _shell(self, serial: str, args: list[str], timeout: int = 15) -> tuple[int, str, str]:
        try:
            proc = self._run(["-s", serial, "shell", *args], timeout=timeout)
        except subprocess.TimeoutExpired:
            return 1, "", "timeout"
        return (
            proc.returncode,
            proc.stdout.decode("utf-8", "replace"),
            proc.stderr.decode("utf-8", "replace"),
        )

    def _run(self, args: list[str], timeout: int = 20) -> subprocess.CompletedProcess:
        return subprocess.run([self.executable, *args], capture_output=True, timeout=timeout)