#
# SPDX-FileCopyrightText: Hadad <hadad@linuxmail.org>
# SPDX-License-Identifier: Apache-2.0
#

import threading

generation_state_lock = threading.Lock()
is_currently_generating = False
stop_generation_requested = False
temporary_files_registry = {}
temporary_files_lock = threading.Lock()
memory_enforcement_lock = threading.Lock()
background_cleanup_thread = None
background_cleanup_stop_event = threading.Event()
background_cleanup_trigger_event = threading.Event()
text_to_speech_manager = None

audio_conversion_semaphore = threading.Semaphore(1)
audio_conversion_queue_lock = threading.Lock()
audio_conversion_active_count = 0
audio_conversion_waiting_count = 0

accelerator_log_lock = threading.Lock()
accelerator_log_thread = None
accelerator_log_stop_event = threading.Event()

model_usage_lock = threading.Lock()
model_usage_count = 0
model_usage_condition = threading.Condition(model_usage_lock)

generation_protection_lock = threading.RLock()
generation_protection_count = 0

def set_text_to_speech_manager(manager_instance):
    global text_to_speech_manager
    text_to_speech_manager = manager_instance

def get_text_to_speech_manager():
    global text_to_speech_manager
    return text_to_speech_manager

def check_if_generation_is_currently_active():
    with generation_state_lock:
        return is_currently_generating

def set_generation_active(is_active):
    global is_currently_generating
    with generation_state_lock:
        is_currently_generating = is_active

def set_stop_generation_requested(requested):
    global stop_generation_requested
    with generation_state_lock:
        stop_generation_requested = requested

def get_stop_generation_requested():
    with generation_state_lock:
        return stop_generation_requested

def increment_audio_conversion_active():
    global audio_conversion_active_count
    with audio_conversion_queue_lock:
        audio_conversion_active_count += 1
        return audio_conversion_active_count

def decrement_audio_conversion_active():
    global audio_conversion_active_count
    with audio_conversion_queue_lock:
        audio_conversion_active_count = max(0, audio_conversion_active_count - 1)
        return audio_conversion_active_count

def get_audio_conversion_active_count():
    with audio_conversion_queue_lock:
        return audio_conversion_active_count

def increment_audio_conversion_waiting():
    global audio_conversion_waiting_count
    with audio_conversion_queue_lock:
        audio_conversion_waiting_count += 1
        return audio_conversion_waiting_count

def decrement_audio_conversion_waiting():
    global audio_conversion_waiting_count
    with audio_conversion_queue_lock:
        audio_conversion_waiting_count = max(0, audio_conversion_waiting_count - 1)
        return audio_conversion_waiting_count

def get_audio_conversion_waiting_count():
    with audio_conversion_queue_lock:
        return audio_conversion_waiting_count

def is_audio_conversion_queue_busy():
    with audio_conversion_queue_lock:
        return audio_conversion_active_count > 0

def increment_model_usage():
    global model_usage_count
    with model_usage_lock:
        model_usage_count += 1
        return model_usage_count

def decrement_model_usage():
    global model_usage_count
    with model_usage_lock:
        model_usage_count = max(0, model_usage_count - 1)
        current_count = model_usage_count
        model_usage_condition.notify_all()
        return current_count

def get_model_usage_count():
    with model_usage_lock:
        return model_usage_count

def is_model_in_use():
    with model_usage_lock:
        return model_usage_count > 0

def wait_for_model_usage_zero(timeout_seconds=None):
    with model_usage_lock:
        if model_usage_count == 0:
            return True
        return model_usage_condition.wait_for(
            lambda: model_usage_count == 0,
            timeout=timeout_seconds
        )

def acquire_generation_protection():
    global generation_protection_count
    generation_protection_lock.acquire()
    generation_protection_count += 1
    return generation_protection_count

def release_generation_protection():
    global generation_protection_count
    generation_protection_count = max(0, generation_protection_count - 1)
    generation_protection_lock.release()

def is_generation_protected():
    if generation_protection_lock.acquire(blocking=False):
        is_protected = generation_protection_count > 0
        generation_protection_lock.release()
        return is_protected
    return True

def try_acquire_generation_protection_for_cleanup(timeout_seconds=0.1):
    acquired = generation_protection_lock.acquire(blocking=True, timeout=timeout_seconds)
    if acquired:
        if generation_protection_count > 0:
            generation_protection_lock.release()
            return False
        return True
    return False

def release_generation_protection_for_cleanup():
    generation_protection_lock.release()