"""
Typed dataclasses returned by the BrowserCLI Python API.

Each object is bound to a BrowserCLI instance so you can call actions
directly on it:

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

  groups = b.groups.list()
  groups[0].tabs()
  groups[0].add_tab("https://example.com")
"""
from __future__ import annotations

from dataclasses import dataclass, field
from typing import Any, Protocol

class BoundBrowser(Protocol):
  tabs: Any
  groups: Any
  nav: Any

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

# ── BrowserCounts ───────────────────────────────────────────────────────────

@dataclass(frozen=True)
class BrowserCounts:
  """Aggregated per-browser counts returned in implicit multi-browser mode."""
  total: int
  by_browser: dict[str, int]
  browser_groups: dict[str, str] = field(default_factory=dict)

# ── Tab ───────────────────────────────────────────────────────────────────────

@dataclass
class Tab:
  """A browser tab."""
  id: int
  window_id: int
  active: bool
  muted: bool = False
  title: str = ""
  url: str = ""
  group_id: int | None = None
  index: int = 0
  browser: str | None = None
  browser_name: str | None = None
  browser_group: str | None = None
  _browser: BoundBrowser | None = field(default=None, repr=False, compare=False, init=False)

  def _b(self) -> BoundBrowser:
    if self._browser is None:
      raise RuntimeError("Tab is not bound to a BrowserCLI instance")
    return self._browser

  def _command(self, name: str, args: dict | None = None):
    browser = self._b()
    return browser.dispatch(name, args)

  def close(self) -> None:
    """Close this tab."""
    self._command("tabs.close", {"tabId": self.id})

  def activate(self) -> None:
    """Switch browser focus to this tab."""
    self._command("tabs.active", {"tabId": self.id})

  def mute(self) -> None:
    """Mute this tab."""
    self._command("tabs.mute", {"tabId": self.id})

  def unmute(self) -> None:
    """Unmute this tab."""
    self._command("tabs.unmute", {"tabId": self.id})

  def reload(self) -> None:
    """Reload this tab."""
    self._command("navigate.reload", {"tabId": self.id})

  def hard_reload(self) -> None:
    """Hard-reload this tab (bypass cache)."""
    self._command("navigate.hard_reload", {"tabId": self.id})

  def move(
    self, *,
    forward: bool = False,
    backward: bool = False,
    group_id: int | None = None,
    window_id: int | None = None,
    index: int | None = None,
  ) -> None:
    """Move this tab.

    Args:
      forward:   Move one position to the right within the window.
      backward:  Move one position to the left within the window.
      group_id:  Move into the tab group with this ID.
      window_id: Move to the window with this ID.
      index:   Absolute position index in the target window.
    """
    self._command("tabs.move", {
      "tabId": self.id,
      "forward": forward,
      "backward": backward,
      "groupId": group_id,
      "windowId": window_id,
      "index": index,
    })

  def html(self) -> str:
    """Return the full HTML source of this tab."""
    return self._command("tabs.html", {"tabId": self.id})

  def screenshot(self, *, format: str = "png", quality: int | None = None) -> str:
    """Capture this tab's visible area. Returns a base64 data URL."""
    return self._b().tabs.screenshot(self.id, format=format, quality=quality)

  def pin(self) -> None:
    """Pin this tab."""
    self._command("tabs.pin", {"tabId": self.id})

  def unpin(self) -> None:
    """Unpin this tab."""
    self._command("tabs.unpin", {"tabId": self.id})

  def refresh(self) -> Tab:
    """Return a fresh snapshot of this tab."""
    return self._b().tabs.status(self.id)

  def wait_for_load(self, *, timeout: float = 30.0, ready_state: str = "complete") -> Tab:
    """Wait until this tab reaches the requested readyState."""
    return self._b().tabs.wait_for_load(self.id, timeout=timeout, ready_state=ready_state)

  def watch_url(self, pattern: str, *, timeout: float = 30.0) -> Tab:
    """Wait until this tab's URL matches regex *pattern*."""
    return self._b().tabs.watch_url(pattern, tab_id=self.id, timeout=timeout)

  def open(self, url: str, *, background: bool = False) -> None:
    """Navigate this tab to *url* in place."""
    self._b().nav.to(self.id, url)


# ── Group ─────────────────────────────────────────────────────────────────────

@dataclass
class Group:
  """A browser tab group."""
  id: int
  title: str
  color: str
  collapsed: bool
  tab_count: int
  window_id: int | None = None
  browser: str | None = None
  browser_name: str | None = None
  browser_group: str | None = None
  _browser: BoundBrowser | None = field(default=None, repr=False, compare=False, init=False)

  def _b(self) -> BoundBrowser:
    if self._browser is None:
      raise RuntimeError("Group is not bound to a BrowserCLI instance")
    return self._browser

  def _command(self, name: str, args: dict | None = None):
    browser = self._b()
    return browser.dispatch(name, args)

  def close(self) -> None:
    """Ungroup (and close) this tab group."""
    self._command("group.close", {"groupId": self.id})

  def tabs(self) -> list[Tab]:
    """Return all tabs inside this group."""
    return self._b().groups.tabs(self.id)

  def move(self, *, forward: bool = False, backward: bool = False) -> None:
    """Move this group forward or backward among groups."""
    self._command("group.move", {
      "group": str(self.id),
      "forward": forward,
      "backward": backward,
    })

  def add_tab(self, url: str | None = None) -> int | None:
    """Open a new tab inside this group. Returns the new tab ID."""
    return self._b().groups.add_tab(self.id, url)