import gradio as gr
from transformers import AutoModelForCausalLM
from transformers import BloomTokenizerFast
from transformers import pipeline, set_seed
import random

model_name = "bloom-560m"
model = AutoModelForCausalLM.from_pretrained(f'jslin09/{model_name}-finetuned-fraud')
tokenizer = BloomTokenizerFast.from_pretrained(f'bigscience/{model_name}', bos_token = '<s>', eos_token = '</s>', pad_token = '<pad>')

def rnd_generate(prompt):
    rnd_seed = random.randint(10, 500)
    set_seed(rnd_seed)
    inputs = tokenizer(prompt, return_tensors="pt") # 回傳的張量使用 Pytorch的格式。如果是 Tensorflow 格式的話，則指定為 "tf"。
    results = model.generate(inputs["input_ids"],
                       max_length=500,
                       num_return_sequences=1, # 產生 1 個句子回來。
                       do_sample=True,
                       temperature=0.75,
                       top_k=50, 
                       top_p=0.9)
    return tokenizer.decode(results[0])

def generate(prompt):
    result_length = len(prompt) + 4
    inputs = tokenizer(prompt, return_tensors="pt") # 回傳的張量使用 Pytorch的格式。如果是 Tensorflow 格式的話，則指定為 "tf"。
    results = model.generate(inputs["input_ids"],
                       num_return_sequences=2, # 產生 2 個句子回來。
                       max_length=result_length,
                       early_stopping=True,
                       do_sample=True, 
                       top_k=50, 
                       top_p=0.9
                      )
    return tokenizer.decode(results[0])

examples = [
    ["闕很大明知金融帳戶之存摺、提款卡及密碼係供自己使用之重要理財工具，"],
    ["梅友乾明知其無資力支付酒店消費，亦無付款意願，竟意圖為自己不法之所有，"],
    ["瓊道帕意圖為自己不法所有，基於竊盜之犯意，"]
]

prompts = [
    ["輸入寫書類的句子，讓電腦生成下一句。或是按以下的範例句子。"],
    ["輸入寫書類的開頭句子，讓電腦隨機生成整篇草稿。"]
]

with gr.Blocks() as demo:
    gr.Markdown(
    """
    <h1 style="text-align: center;">Legal Document Drafting</h1>
    """)
    with gr.Row() as row:
        with gr.Column():
            gr.Markdown("""
            <h3>Abstract</h3>
            <p>With the development of large-scale language model technology, it has become a mainstream paradigm to solve downstream natural language processing tasks by fine-tuning pre-trained large-scale language models. Training a language model in the legal domain requires a large number of legal documents so that the language model can learn legal terms and the particularity of the format of legal documents. Therefore, it usually needs to rely on many manually labeled data sets for training. In the legal domain, obtaining a large amount of manually annotated datasets is practically difficult, so the application of traditional NLP methods in the drafting of legal documents is limited. The experimental results of this paper show that fine-tuning a large pre-trained language model on a local computer with a large number of unlabeled legal documents can not only significantly improve the performance of the fine-tuned model on the legal document drafting task, but also provide a basis for automatic legal document drafting. It provides new ideas and approaches, and at the same time protects information privacy and reduces information security issues.</p>
            <h3>摘要</h3>
            <p>
            隨著大型語言模型技術的發展，藉由微調預訓練的大型語言模型來解決自然語言處理的下游任務，已經是主流的範式。訓練法律專業領域的語言模型，需要有大量的法律文件，以便讓語言模型能學得法律術語以及法律文書格式的特殊性，因此，通常需要依賴大量人工標註的資料集進行訓練，而在法律領域的應用，取得大量人工標註的資料集是有實際上的困難，因此傳統的NLP方法應用在法律文件起草中的任務就受到了限制。本文實驗結果表明，以大量無標記的法律文件，在本地端電腦中微調大型預訓練語言模型，除了可以顯著提高微調後所得之模型在法律文件起草任務上的性能，為實現自動化法律文件起草提供了新的思路和方法，並同時保障了資訊隱私以及降低資訊安全等問題。
            </p>
            """)
        with gr.Column(scale=1, min_width=600):
            with gr.Tab("Writing Assist"):
                result = gr.components.Textbox(lines=7, label="Writing Assist", placeholder=prompts[0])
                prompt = gr.components.Textbox(lines=2, label="Prompt", placeholder=examples[0], visible=False)
                gr.Examples(examples, label='Examples', inputs=[prompt])
                prompt.change(generate, inputs=[prompt], outputs=[result])
                btn = gr.Button("Next sentence")
                btn.click(generate, inputs=[result], outputs=[result])
            with gr.Tab("Random Generative"):
                result2 = gr.components.Textbox(lines=7, label="Random Generative", show_label=True, placeholder=prompts[1])
                gr.Examples(examples, label='Examples', inputs=[result2])
                rnd_btn = gr.Button("Random Drafting")
                rnd_btn.click(rnd_generate, inputs=[result2], outputs=[result2])
    
if __name__ == "__main__":
    demo.launch()