"""
browser_cli — Python SDK for controlling your running browser.

Usage:
  from browser_cli import BrowserCLI
  b = BrowserCLI()

  tabs = b.tabs.list()      # list[Tab]
  tabs[0].close()
  tabs[0].move(forward=True)

  groups = b.groups.list()    # list[Group]
  groups[0].tabs()
  groups[0].add_tab("https://example.com")

  b.nav.open("https://example.com")
  b.dom.click("#submit")
  b.session.save("work")

  # When multiple browser instances are active, pass the alias:
  b = BrowserCLI(browser="brave")

Commands are grouped into namespaces on the client:
  b.nav    navigation (open, reload, back, forward, focus, search)
  b.tabs     tabs (list, open, close, move, status, mute, sort, ...)
  b.groups   tab groups (list, create, add_tab, move, close)
  b.windows  browser windows (list, open, close, rename)
  b.dom    page elements (query, click, type, wait_for, eval, ...)
  b.extract  content extraction (links, images, text, json, markdown)
  b.page     page info
  b.storage  localStorage / sessionStorage
  b.cookies  cookies (list, get, set)
  b.session  sessions (save, load, list, diff, ...)
  b.perf     performance profile + background jobs
  b.extension  control the extension itself
  b.decorators workflow decorators for scripts
"""
from collections.abc import Callable

from browser_cli.client import active_browser_targets, remote_browser_targets, send_command, send_command_async
from browser_cli.errors import BrowserNotConnected
from browser_cli.models import BrowserCounts, Group, Tab
from browser_cli.sdk import (
  CookiesNS,
  DecoratorsNS,
  DomNS,
  ExtensionNS,
  ExtractNS,
  GroupsNS,
  NAMESPACE_SPECS,
  NavigationNS,
  PageNS,
  PerfNS,
  SessionNS,
  StorageNS,
  TabsNS,
  WindowsNS,
)
from browser_cli.sdk.factories import FactoryMixin
from browser_cli.sdk.routing import RoutingMixin

from browser_cli.async_sdk import AsyncBrowserCLI

__all__ = ["BrowserCLI", "AsyncBrowserCLI", "BrowserCounts", "BrowserNotConnected", "Tab", "Group"]

class BrowserCLI(FactoryMixin, RoutingMixin):
  """Client for a running browser, with commands grouped into namespaces.

  The client itself holds the connection target (browser/remote/key) and the
  shared machinery; the actual commands live on namespace accessors such as
  :attr:`tabs`, :attr:`dom`, and :attr:`session`. Object construction
  (``Tab``/``Group``) comes from :class:`~browser_cli.sdk.factories.FactoryMixin`
  and multi-browser fan-out from :class:`~browser_cli.sdk.routing.RoutingMixin`.
  """

  _browser: str | None
  _remote: str | None
  _key: str | None
  _command_sender: Callable
  nav: NavigationNS
  tabs: TabsNS
  groups: GroupsNS
  windows: WindowsNS
  dom: DomNS
  extract: ExtractNS
  page: PageNS
  storage: StorageNS
  cookies: CookiesNS
  session: SessionNS
  perf: PerfNS
  extension: ExtensionNS
  decorators: DecoratorsNS

  def __init__(
    self,
    browser: str | None = None,
    remote: str | None = None,
    key: str | None = None,
    *,
    _command_sender=None,
  ):
    """
    Args:
      browser: Profile alias to target. Required when multiple browser
           instances are active. Equivalent to ``--browser`` on the CLI.
      remote: Connect to a remote browser exposed via ``browser-cli serve``.
          Format: ``"host:port"`` (e.g. ``"browser-host.example:8765"``).
          Can be combined with ``browser`` to route to a specific
          remote profile.
      key: Path to Ed25519 private key PEM for pubkey auth, or ``"agent"``
         to use a key from the SSH agent (YubiKey, gpg-agent, etc.).
         Defaults to ``~/.config/browser-cli/client.key.pem`` if that file exists.
    """
    self._browser = browser
    self._remote = remote
    self._key = key if key else None
    self._command_sender = _command_sender or send_command

    for name, namespace_type in NAMESPACE_SPECS:
      setattr(self, name, namespace_type(self))
    self.decorators = DecoratorsNS(self)

  @property
  def browser(self) -> str | None:
    """Target browser/profile alias, equivalent to ``--browser``."""
    return self._browser

  @property
  def remote(self) -> str | None:
    """Remote endpoint used by this client, if any."""
    return self._remote

  @property
  def key(self) -> str | None:
    """Ed25519 key spec used for remote auth, if explicitly configured."""
    return self._key

  def dispatch(self, command: str, args: dict | None = None):
    """Dispatch one browser command using this client's target settings."""
    return self._command_sender(command, args, profile=self._browser, remote=self._remote, key=self._key)

  def require_tab(self, data, error: str):
    """Convert a tab-like command response into a bound Tab."""
    return self.require_tab_response(data, error)

  _FIELD_MISSING = object()

  def field(self, result, key, default=None, *, fallback=_FIELD_MISSING):
    """Read a named field from command output."""
    if fallback is self._FIELD_MISSING:
      return self._field(result, key, default)
    return self._field(result, key, default, fallback=fallback)

  def _cmd(self, command: str, args: dict | None = None):
    return self.dispatch(command, args)

  def command(self, command: str, args: dict | None = None):
    """Send a raw browser-cli command and return its response.

    This is the SDK escape hatch for commands that do not have a dedicated
    namespace method yet.
    """
    return self._cmd(command, args or {})

  def clients(self) -> list[dict]:
    """Return the active browser clients known to this connection."""
    return self._cmd("clients.list", {})