"""设备池管理 API（本地 SQLite 清单）。"""
import threading
from concurrent.futures import ThreadPoolExecutor, as_completed

from flask import Blueprint, jsonify, request

from core import device_pool, device_discovery
from core.adb_helper import adb_connect, adb_connect_light
from core.logger import get_logger
from web.auth import perm_required, PERM_DEVICES

_log = get_logger("web")
bp = Blueprint("devices", __name__)

@bp.route("/api/devices/pool", methods=["GET"])
@perm_required(PERM_DEVICES)
def api_devices_pool_list():
    """设备池清单（SQLite，含实时在线状态）。"""
    try:
        online = set(device_pool.list_online())
    except Exception:
        online = set()
    rows = device_pool.list_devices()
    for r in rows:
        r["online"] = r["serial"] in online
    return jsonify({"ok": True, "devices": rows})

@bp.route("/api/devices/pool/add", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_pool_add():
    """添加/更新设备：{serial, name, note?}。

    **名称必填且唯一**（设备在平台里的身份标识，分组/任务/日志都靠它认设备）。
    IP:5555 设备添加后立即尝试 adb connect 并读取**设备指纹**：若指纹命中池中已有
    设备（同一台设备换了 IP），自动**认领**——迁移旧记录（保留原名）并同步
    分组与任务里的引用，而不是新增一条。
    """
    data = request.json or {}
    serial = (data.get("serial") or "").strip()
    if not serial:
        return jsonify({"ok": False, "error": "请输入设备 serial（如 100.100.10.20:5555）"}), 400
    name = (data.get("name") or "").strip()
    note = (data.get("note") or "").strip()
    if not name:
        return jsonify({"ok": False, "error":
                        "请填写设备名称——名称是设备在平台里的唯一标识"
                        "（分组、任务目标、日志都用它认设备）"}), 400
    # 重名先查（放在 adb 之前：连不上的 IP 不该让用户白等）
    if device_pool.name_taken(name, exclude_serial=serial):
        return jsonify({"ok": False, "error": f"名称『{name}』已被其它设备占用，请换一个"}), 400
    # 轻量 connect（单次、短超时，不用 5 次重试的 adb_connect，避免不可达设备把接口卡住）
    if ":" in serial:
        try:
            adb_connect_light(serial)
        except Exception:
            pass
    fp = device_pool.read_fingerprint(serial) if ":" in serial else ""
    claimed_old, claimed_name = device_pool.claim_device(serial, fp) if fp else (None, "")
    # 认领时保留设备**原有名称**（身份优先于本次输入），没有原名才用输入值
    use_name = (claimed_name or name).strip()
    if use_name != name and device_pool.name_taken(use_name, exclude_serial=serial):
        return jsonify({"ok": False, "error": f"名称『{use_name}』已被其它设备占用，请换一个"}), 400
    is_new = device_pool.add_device(serial, name=use_name, note=note, fingerprint=fp)
    # 后台采集型号 + 指纹（不阻塞添加响应）
    threading.Thread(target=device_pool.refresh_info, args=(serial,), daemon=True).start()
    if claimed_old:
        msg = (f"已认领：这是『{use_name}』（原地址 {claimed_old}），"
               f"分组与任务的引用已自动同步")
    else:
        msg = "已添加" if is_new else "已更新"
    _log.info(f"设备池管理: {msg} {serial} name={use_name}")
    return jsonify({"ok": True, "msg": msg, "is_new": is_new,
                    "claimed": bool(claimed_old), "old_serial": claimed_old or ""})


@bp.route("/api/devices/pool/rename", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_pool_rename():
    """重命名设备：{serial, name}。名称必填且唯一。"""
    data = request.json or {}
    serial = (data.get("serial") or "").strip()
    name = (data.get("name") or "").strip()
    if not serial or not name:
        return jsonify({"ok": False, "error": "缺少 serial 或 name"}), 400
    if device_pool.name_taken(name, exclude_serial=serial):
        return jsonify({"ok": False, "error": f"名称『{name}』已被其它设备占用，请换一个"}), 400
    if not device_pool.rename_device(serial, name):
        return jsonify({"ok": False, "error": "设备不存在"}), 404
    return jsonify({"ok": True, "msg": f"已重命名为『{name}』"})

@bp.route("/api/devices/pool/relocate", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_pool_relocate():
    """人工认领（换地址兜底）：{old_serial, new_serial}。

    用于设备换了 IP 但**旧地址已断联、指纹也没采过**、自动认领无从匹配时：
    由人工指认"这条记录就是那台设备，现在在新地址"，迁移并同步分组/任务引用。
    """
    data = request.json or {}
    old_serial = (data.get("old_serial") or "").strip()
    new_serial = (data.get("new_serial") or "").strip()
    if not old_serial or not new_serial:
        return jsonify({"ok": False, "error": "缺少 old_serial 或 new_serial"}), 400
    if ":" in new_serial:
        try:
            adb_connect_light(new_serial)
        except Exception:
            pass
    fp = device_pool.read_fingerprint(new_serial) if ":" in new_serial else ""
    ok, name, msg = device_pool.relocate_device(old_serial, new_serial, fingerprint=fp)
    if not ok:
        return jsonify({"ok": False, "error": msg}), 400
    # 新地址若在待连接池里，一并清掉（已经是池内设备了）
    try:
        device_discovery.ignore_pending(new_serial)
    except Exception:
        pass
    threading.Thread(target=device_pool.refresh_info, args=(new_serial,), daemon=True).start()
    _log.info(f"设备池管理: 人工认领 {old_serial} → {new_serial}（{name}）")
    return jsonify({"ok": True, "msg": msg, "name": name})


@bp.route("/api/devices/pool/remove", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_pool_remove():
    """从设备池删除（不再参与调度；不影响其他系统）。"""
    serial = (request.json or {}).get("serial", "").strip()
    if not serial:
        return jsonify({"ok": False, "error": "缺少 serial"}), 400
    ok = device_pool.remove_device(serial)
    if not ok:
        return jsonify({"ok": False, "error": "设备不存在"}), 404
    return jsonify({"ok": True, "msg": "已删除"})

@bp.route("/api/devices/pool/toggle", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_pool_toggle():
    """启用/停用设备（停用后不参与调度）。"""
    data = request.json or {}
    serial = (data.get("serial") or "").strip()
    enabled = data.get("enabled")
    if not serial or enabled is None:
        return jsonify({"ok": False, "error": "缺少参数"}), 400
    ok = device_pool.set_enabled(serial, bool(enabled))
    if not ok:
        return jsonify({"ok": False, "error": "设备不存在"}), 404
    return jsonify({"ok": True, "msg": "已" + ("启用" if enabled else "停用")})

@bp.route("/api/devices/pool/reconnect", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_pool_reconnect():
    """一键重连：并发 adb connect 池内全部 IP:5555 设备（后台执行，不阻塞）。"""
    def _run():
        try:
            serials = [s for s in device_pool.list_configured() if ":" in s]
        except Exception:
            return
        if not serials:
            return
        from concurrent.futures import ThreadPoolExecutor, as_completed
        with ThreadPoolExecutor(max_workers=10) as pool:
            futures = {pool.submit(adb_connect, s): s for s in serials}
            for _ in as_completed(futures):
                pass
        _log.info(f"设备池一键重连完成（{len(serials)} 台）")
        # 重连后顺手刷新型号
        try:
            device_pool.refresh_all_models()
        except Exception:
            pass
    import threading
    threading.Thread(target=_run, daemon=True).start()
    return jsonify({"ok": True, "msg": "重连已启动（后台并发，约 10-20 秒）"})

@bp.route("/api/devices/pool/refresh_models", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_pool_refresh_models():
    """批量采集池内在线设备的型号（后台执行，不阻塞）。"""
    import threading
    threading.Thread(target=device_pool.refresh_all_models, daemon=True).start()
    return jsonify({"ok": True, "msg": "型号采集已启动（后台并发，约 10 秒）"})


# ================== API：设备自动发现（扫描 → 待连接池 → 确认） ==================
# 扫描只把设备放进待连接池（pending），用户确认后才加入正式设备池并连接。
@bp.route("/api/devices/discovery", methods=["GET"])
@perm_required(PERM_DEVICES)
def api_devices_discovery():
    """发现状态 + 待连接列表 + 正式池断联设备（前端 10s 轮询一次请求）。"""
    try:
        status = device_discovery.get_status()
        pending = device_discovery.list_pending()
        pool_offline = device_discovery.list_pool_offline()
    except Exception as e:
        _log.warning(f"discovery 状态获取失败: {e}")
        return jsonify({"ok": False, "error": str(e)[:120]}), 503
    status["pending"] = pending
    status["pool_offline"] = pool_offline
    return jsonify({"ok": True, **status})


@bp.route("/api/devices/discovery/scan", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_discovery_scan():
    """手动触发一轮扫描（后台执行，约 5-30 秒）。"""
    ok, result = device_discovery.scan_once(manual=True)
    if not ok:
        return jsonify({"ok": False, "error": result.get("error", "扫描失败")}), 409
    if "error" in result:
        return jsonify({"ok": False, "error": result["error"]}), 400
    return jsonify({"ok": True, "msg": "扫描已启动（后台执行，约 5-30 秒）",
                    "result": result})


@bp.route("/api/devices/discovery/confirm", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_discovery_confirm():
    """确认连接：待连接 → 正式设备池 + 后台 adb connect + 采型号。

    名称规则：**新设备必须填名称**；若指纹命中池中已有设备（同一台换了 IP），
    则不需要名称——保留原记录与原名，并把分组/任务引用同步到新地址。
    """
    data = request.json or {}
    serial = (data.get("serial") or "").strip()
    name = (data.get("name") or "").strip()
    if not serial:
        return jsonify({"ok": False, "error": "缺少 serial"}), 400
    if ":" in serial:
        try:
            adb_connect_light(serial)
        except Exception:
            pass
    fp = device_pool.read_fingerprint(serial) if ":" in serial else ""
    matched = device_pool.find_by_fingerprint(fp) if fp else None
    in_pool = serial in device_pool.list_configured()
    if not in_pool and not matched and not name:
        return jsonify({"ok": False, "error":
                        "请为该设备填写名称（名称是设备在平台里的唯一标识）"}), 400
    if name and device_pool.name_taken(name, exclude_serial=serial if in_pool else ""):
        return jsonify({"ok": False, "error": f"名称『{name}』已被其它设备占用，请换一个"}), 400
    ok, msg, is_new = device_discovery.confirm_pending(serial, name=name, fingerprint=fp)
    if not ok:
        return jsonify({"ok": False, "error": msg}), 404
    if ":" in serial:
        def _connect():
            try:
                adb_connect(serial)
            except Exception:
                pass
            try:
                device_pool.refresh_info(serial)
            except Exception:
                pass
        threading.Thread(target=_connect, daemon=True).start()
    _log.info(f"设备池管理: 发现确认 {serial}")
    return jsonify({"ok": True, "msg": msg, "is_new": is_new})


@bp.route("/api/devices/discovery/ignore", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_discovery_ignore():
    """忽略：从待连接池删除（下轮扫描可能再次发现）。"""
    serial = (request.json or {}).get("serial", "").strip()
    if not serial:
        return jsonify({"ok": False, "error": "缺少 serial"}), 400
    ok, msg = device_discovery.ignore_pending(serial)
    if not ok:
        return jsonify({"ok": False, "error": msg}), 404
    return jsonify({"ok": True, "msg": msg})


@bp.route("/api/devices/discovery/reconnect", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_discovery_reconnect():
    """手动立即重连正式池断联设备（后台 adb connect + 采型号）。

    日常无需手动——发现线程每轮（默认 60s）自动重连断联设备；
    本端点用于不想等下一轮扫描时立即拉起。
    """
    serial = (request.json or {}).get("serial", "").strip()
    if not serial:
        return jsonify({"ok": False, "error": "缺少 serial"}), 400
    from core import device_pool
    if serial not in device_pool.list_configured():
        return jsonify({"ok": False, "error": "设备不在设备池中"}), 404

    def _reconnect():
        try:
            if ":" in serial:
                adb_connect(serial)
            # 无论是否连上，采一次型号（模型失败静默）
            try:
                device_pool.refresh_model(serial)
            except Exception:
                pass
        except Exception as e:
            _log.warning(f"手动重连 {serial} 异常: {e}")

    threading.Thread(target=_reconnect, daemon=True).start()
    _log.info(f"设备池管理: 手动重连 {serial}")
    return jsonify({"ok": True, "msg": "重连已启动（约 5-15 秒生效）"})


@bp.route("/api/devices/discovery/settings", methods=["POST"])
@perm_required(PERM_DEVICES)
def api_devices_discovery_settings():
    """保存发现配置（部分字段更新）：{enabled?, subnets?, interval?, port?}。"""
    data = request.json or {}
    ok, msg = device_discovery.save_settings(
        enabled=data.get("enabled"),
        subnets=data.get("subnets"),
        interval=data.get("interval"),
        port=data.get("port"),
        auto_claim=data.get("auto_claim"))
    if not ok:
        return jsonify({"ok": False, "error": msg}), 400
    return jsonify({"ok": True, "msg": msg})


# ================== API：Tailscale 管理（仅管理员） ==================
# 通过 Tailscale 官方 API v2 管理 tailnet 设备（列表/改名/授权/密钥不过期/删除/生成 auth key）。
# 设备 IP 由 tailnet 自动分配，API 无法修改，列表只读展示。