import os
import sys
import subprocess
import streamlit as st
import io 
import pypdfium2 
from PIL import Image
import logging

# 设置日志记录器
logging.basicConfig(level=logging.INFO)
logger = logging.getLogger(__name__)


def clone_repo():
    # 从环境变量中获取 GitHub Token
    github_token = os.getenv('GH_TOKEN')

    if github_token is None:
        logger.error("GitHub token is not set. Please set the GH_TOKEN secret in your Space settings.")
        return False
    
    # 使用 GitHub Token 进行身份验证并克隆仓库
    clone_command = f'git clone https://{github_token}@github.com/mamba-ai/invoice_agent.git'
    if os.path.exists('invoice_agent'):
        logger.warning("Repository already exists.")
        repo_dir = 'invoice_agent'
        # 将仓库路径添加到 Python 模块搜索路径中
        logger.warning(f"Adding {os.path.abspath(repo_dir)} to sys.path")
        sys.path.append(os.path.abspath(repo_dir))
        return True
    else:
        logger.info("Cloning repository...")
        result = subprocess.run(clone_command, shell=True, capture_output=True, text=True)
    
    if result.returncode == 0:
        logger.warning("Repository cloned successfully.")
        repo_dir = 'invoice_agent'
        
        # 将仓库路径添加到 Python 模块搜索路径中
        sys.path.append(os.path.abspath(repo_dir))
        logger.warning(f"Adding {os.path.abspath(repo_dir)} to sys.path")
        return True
    else:
        logger.error(f"Failed to clone repository: {result.stderr}")
        return False



if clone_repo():
    # 克隆成功后导入模块    
    import invoice_agent.agent as ia
    # from invoice_agent.agent import load_models, get_ocr_predictions, get_json_result
    
    def open_pdf(pdf_file):
        stream = io.BytesIO(pdf_file.getvalue())
        return pypdfium2.PdfDocument(stream)


    @st.cache_data()
    def get_page_image(pdf_file, page_num, dpi=96):
        doc = open_pdf(pdf_file)
        renderer = doc.render(
            pypdfium2.PdfBitmap.to_pil,
            page_indices=[page_num - 1],
            scale=dpi / 72,
        )
        png = list(renderer)[0]
        png_image = png.convert("RGB")
        return png_image


    @st.cache_data()
    def page_count(pdf_file):
        doc = open_pdf(pdf_file)
        return len(doc)
    
    st.set_page_config(layout="wide")

    models = ia.load_models()

    st.title("""
    受領した請求書を自動で電子化 (Demo)
    """)

    col1, _, col2 = st.columns([.45, 0.1, .45])

    in_file = st.sidebar.file_uploader(
        "PDFファイルまたは画像:", 
        type=["pdf", "png", "jpg", "jpeg", "gif", "webp"],
    )

    if in_file is None:
        st.stop()

    filetype = in_file.type
    whole_image = False
    if "pdf" in filetype:
        page_count = page_count(in_file)
        page_number = st.sidebar.number_input(f"ページ番号 {page_count}:", min_value=1, value=1, max_value=page_count)

        pil_image = get_page_image(in_file, page_number)
    else:
        pil_image = Image.open(in_file).convert("RGB")

    text_rec = st.sidebar.button("認識開始")

    if pil_image is None:
        st.stop()
    
    with col1:
        st.write("## アップロードされたファイル")
        st.image(pil_image, caption="アップロードされたファイル", use_column_width=True)
    
    if text_rec:
        with col2:
            st.write("## 結果")
        
            # Placeholder for status indicator
            status_placeholder = st.empty()
        
            with st.spinner('現在ファイルを解析中です'):
                # Simulate model running time
                # time.sleep(5)  # Replace this with actual model running code
                predictions = ia.get_ocr_predictions(pil_image, models)
            
                # Simulate OCR result as a JSON object
                json_predictions = ia.get_json_result(predictions)
            
                # After model finishes
                status_placeholder.success('ファイルの解析が完了しました!')
            
                # Display the result
                st.write("解析後の内容:")
                st.json(json_predictions)
                # st.write(predictions)