import logging
import requests

from global_config import GlobalConfig


HF_API_URL = f"https://api-inference.huggingface.co/models/{GlobalConfig.HF_LLM_MODEL_NAME}"
HF_API_HEADERS = {"Authorization": f"Bearer {GlobalConfig.HUGGINGFACEHUB_API_TOKEN}"}

logging.basicConfig(
    level=GlobalConfig.LOG_LEVEL,
    format='%(asctime)s - %(message)s',
)

# llm = None


def hf_api_query(payload: dict):
    """
    Invoke HF inference end-point API.

    :param payload: The prompt for the LLM and related parameters
    :return: The output from the LLM
    """

    try:
        response = requests.post(HF_API_URL, headers=HF_API_HEADERS, json=payload, timeout=15)
        result = response.json()
    except requests.exceptions.Timeout as te:
        logging.error('*** Error: hf_api_query timeout! %s', str(te))
        result = {}

    return result


def generate_slides_content(topic: str) -> str:
    """
    Generate the outline/contents of slides for a presentation on a given topic.

    :param topic: Topic on which slides are to be generated
    :return: The content in JSON format
    """

    with open(GlobalConfig.SLIDES_TEMPLATE_FILE, 'r', encoding='utf-8') as in_file:
        template_txt = in_file.read().strip()
        template_txt = template_txt.replace('<REPLACE_PLACEHOLDER>', topic)

    output = hf_api_query({
        "inputs": template_txt,
        "parameters": {
            'temperature': GlobalConfig.LLM_MODEL_TEMPERATURE,
            'min_length': GlobalConfig.LLM_MODEL_MIN_OUTPUT_LENGTH,
            'max_length': GlobalConfig.LLM_MODEL_MAX_OUTPUT_LENGTH,
            'max_new_tokens': GlobalConfig.LLM_MODEL_MAX_OUTPUT_LENGTH,
            'num_return_sequences': 1,
            'return_full_text': False,
            # "repetition_penalty": 0.0001
        },
        "options": {
            'wait_for_model': True,
            'use_cache': True
        }
    })

    output = output[0]['generated_text'].strip()
    # output = output[len(template_txt):]

    json_end_idx = output.rfind('```')
    if json_end_idx != -1:
        # logging.debug(f'{json_end_idx=}')
        output = output[:json_end_idx]

    logging.debug('generate_slides_content: output: %s', output)

    return output


if __name__ == '__main__':
    # results = get_related_websites('5G AI WiFi 6')
    #
    # for a_result in results.results:
    #     print(a_result.title, a_result.url, a_result.extract)

    # get_ai_image('A talk on AI, covering pros and cons')
    pass