import PyPDF2
from flask_app.general.clean_pdf import extract_common_header, clean_page_content

def extract_text_by_page(file_path):
    common_header = extract_common_header(file_path)
    result = ""
    with open(file_path, 'rb') as file:
        reader = PyPDF2.PdfReader(file)
        num_pages = len(reader.pages)
        # print(f"Total pages: {num_pages}")
        for page_num in range(num_pages):
            page = reader.pages[page_num]
            text = page.extract_text()
            if text:
                cleaned_text = clean_page_content(text,common_header)
                # cleaned_text=text
                print(cleaned_text)
                print("-----------------"+str(page_num))
                result += cleaned_text
                # print(f"Page {page_num + 1} Content:\n{cleaned_text}")
            else:
                print(f"Page {page_num + 1} is empty or text could not be extracted.")
        return result


def save_extracted_text_to_txt(pdf_path, txt_path):
    """
    调用 extract_text_by_page 函数提取PDF文本，并将其保存到指定的TXT文件中。

    :param pdf_path: 输入的PDF文件路径
    :param txt_path: 输出的TXT文件路径
    """
    try:
        # 提取文本内容
        extracted_text = extract_text_by_page(pdf_path)

        # 将提取的文本写入TXT文件
        with open(txt_path, 'w', encoding='utf-8') as txt_file:
            txt_file.write(extracted_text)

        print(f"文本已成功提取并保存到 {txt_path}")

    except FileNotFoundError:
        print(f"文件未找到: {pdf_path}")
    except Exception as e:
        print(f"发生错误: {e}")

# import fitz  # PyMuPDF
# import re
#
#
# def clean_page_content(text, common_header):
#     if common_header:
#         for header_line in common_header.split('\n'):
#             if header_line.strip():
#                 text = re.sub(r'^' + re.escape(header_line.strip()) + r'\n?', '', text, count=1)
#
#     text = re.sub(r'^\s*\d+\s*(?=\D)', '', text)
#     text = re.sub(r'\s+\d+\s*$', '', text)
#     text = re.sub(r'\s*\/\s*\d+\s*', '', text)
#
#     return text
#
#
# def extract_common_header(pdf_path):
#     doc = fitz.open(pdf_path)
#     headers = []
#     total_pages = len(doc)
#
#     if total_pages == 2:
#         pages_to_read = 2
#         start_page = 0
#     else:
#         pages_to_read = 3
#         middle_page = total_pages // 2
#         start_page = max(0, middle_page - 1)
#
#     for i in range(start_page, min(start_page + pages_to_read, total_pages)):
#         page = doc[i]
#         text = page.get_text()
#         if text:
#             first_lines = text.strip().split('\n')[:3]
#             headers.append(first_lines)
#
#     doc.close()
#
#     if len(headers) < 2:
#         return ""
#
#     common_headers = []
#     for lines in zip(*headers):
#         common_line = set(lines[0].split()).intersection(*[set(line.split()) for line in lines[1:]])
#         if common_line:
#             common_headers.append(' '.join(common_line))
#
#     return '\n'.join(common_headers)
#
#
# def extract_text_by_page(file_path):
#     common_header = extract_common_header(file_path)
#     result = ""
#     doc = fitz.open(file_path)
#     num_pages = len(doc)
#
#     for page_num in range(num_pages):
#         page = doc[page_num]
#         text = page.get_text()
#         if text:
#             cleaned_text = clean_page_content(text, common_header)
#             print(cleaned_text)
#             result += cleaned_text
#         else:
#             print(f"Page {page_num + 1} is empty or text could not be extracted.")
#
#     doc.close()
#     return result


if __name__ == '__main__':
    # file_path='D:\\flask_project\\flask_app\\static\\output\\output1\\648e094b-e677-47ce-9073-09e0c82af210\\ztbfile_tobidders_notice_part2.pdf'
    # file_path = r"C:\Users\Administrator\Desktop\货物标\zbfiles\东莞支队查验招标文件.pdf"
    file_path = 'C:\\Users\\Administrator\\Desktop\\货物标\\output4\\2-招标文件（2020年广水市中小学教师办公电脑系统及多媒体“班班通”设备采购安装项目）_tobidders_notice_part2.pdf'
    # file_path = 'C:\\Users\\Administrator\\Desktop\\货物标\\截取test\\交警支队机动车查验监管系统项目采购_tobidders_notice_part1.pdf'
    # file_path = "C:\\Users\\Administrator\\Desktop\\招标文件\\招标test文件夹\\zbtest8.pdf"
    # file_path="C:\\Users\\Administrator\\Desktop\\fsdownload\\45f650ce-e519-457b-9ad6-5840e2ede539\\ztbfile_procurement.pdf"
    ress = extract_common_header(file_path)
    print(ress)
    print("-----------------")
    res=extract_text_by_page(file_path)
    # print(res)磋商文件_tobidders_notice_part2.pdf
    # save_extracted_text_to_txt(file_path,"output.txt")