from core.observers.ApplicationVersionObserver import ApplicationVersionObserver
from core.observers.ClientObserver import ClientObserver
from core.observers.ConnectionObserver import ConnectionObserver
from core.observers.InvoiceObserver import InvoiceObserver
from core.observers.ProfileObserver import ProfileObserver
from core.services.encrypted_proxy.observer_helpers import create_ui_state, create_event_handlers
from core.controllers.ApplicationController import ApplicationController
from cli.killswitch_monitor import drop_state, tunnel_state
from cli.ui import progress_bar
from cli.helpers import sanitize_profile
import pprint

# ── Observer instances ────────────────────────────────────────────────────────

application_version_observer = ApplicationVersionObserver()
client_observer              = ClientObserver()
connection_observer          = ConnectionObserver()
invoice_observer             = InvoiceObserver()
profile_observer             = ProfileObserver()

# ── Shared UI state (used by observer_helpers) ────────────────────────────────

_ui_state = create_ui_state()

# Public refs for profile.py to access monitor and timer
def get_ui_state():
    return _ui_state

# ── Connection event handlers (from core) ─────────────────────────────────────

_handlers = create_event_handlers(_ui_state, drop_state, tunnel_state)

connection_observer.subscribe('connecting',    _handlers['on_connecting'])
connection_observer.subscribe('connected',     _handlers['on_connected'])
connection_observer.subscribe('connected_token', _handlers['on_connected_token'])
connection_observer.subscribe('disconnected',  _handlers['on_disconnected'])
connection_observer.subscribe('error',         _handlers['on_error'])

# ── Tor events ────────────────────────────────────────────────────────────────

def _on_tor_bootstrapping(event):
    from cli.ui import Spinner
    _ui_state['spinner'] = Spinner("Starting Tor...")
    _ui_state['spinner'].start()

def _on_tor_bootstrap_progressing(event):
    pct = int(event.meta.get("progress", 0))
    progress_bar(pct, 100, "Tor bootstrap")

def _on_tor_bootstrapped(event):
    from cli.ui import label_ok
    if _ui_state['spinner']:
        _ui_state['spinner'].stop()
        _ui_state['spinner'] = None
    print()
    label_ok("Tor ready")

connection_observer.subscribe('tor_bootstrapping',         _on_tor_bootstrapping)
connection_observer.subscribe('tor_bootstrap_progressing', _on_tor_bootstrap_progressing)
connection_observer.subscribe('tor_bootstrapped',          _on_tor_bootstrapped)

# ── Application version events ────────────────────────────────────────────────

application_version_observer.subscribe(
    'downloading',
    lambda event: print(
        f'Downloading {ApplicationController.get(event.subject.application_code).name}, '
        f'version {event.subject.version_number}...'
    )
)
application_version_observer.subscribe(
    'download_progressing',
    lambda event: print(f'Current progress: {event.meta.get("progress"):.2f}%', flush=True, end='\r')
)
application_version_observer.subscribe('downloaded', lambda event: print('\n'))

# ── Client events ─────────────────────────────────────────────────────────────

client_observer.subscribe('synchronizing',      lambda event: print('Synchronizing...\n'))
client_observer.subscribe('updating',           lambda event: print('Updating client...'))
client_observer.subscribe('update_progressing', lambda event: print(f'Current progress: {event.meta.get("progress"):.2f}%', flush=True, end='\r'))
client_observer.subscribe('updated',            lambda event: print('\n'))

# ── Invoice events ────────────────────────────────────────────────────────────

invoice_observer.subscribe('retrieved',  lambda event: print(f'\n{pprint.pp(event.subject)}\n'))
invoice_observer.subscribe('processing', lambda event: print('A payment has been detected and is being verified...\n'))
invoice_observer.subscribe('settled',    lambda event: print('The payment has been successfully verified.\n'))

# ── Profile events ────────────────────────────────────────────────────────────

profile_observer.subscribe('created',   lambda event: pprint.pp((sanitize_profile(event.subject), 'Created')))
profile_observer.subscribe('destroyed', lambda event: pprint.pp((sanitize_profile(event.subject), 'Destroyed')))
profile_observer.subscribe('disabled',  lambda event: pprint.pp((sanitize_profile(event.subject), 'Disabled')) if event.meta.get('explicitly') else None)
profile_observer.subscribe('enabled',   lambda event: pprint.pp((sanitize_profile(event.subject), 'Enabled')))