# flask_app/routes/little_zbparse.py

import json
import os
from flask import Blueprint, request, jsonify, Response, g

from flask_app.ConnectionLimiter import require_connection_limit
from flask_app.main.download import download_file
from flask_app.general.接口_小解析 import little_parse_main
from flask_app.routes.utils import validate_request, validate_and_setup_logger

little_zbparse_bp = Blueprint('little_zbparse', __name__)

@little_zbparse_bp.route('/little_zbparse', methods=['POST'])
@require_connection_limit(timeout=300)
@validate_and_setup_logger
def little_zbparse():
    logger = g.logger
    file_url, zb_type = validate_request()

    if isinstance(file_url, tuple):  # 检查是否为错误响应
        return file_url

    try:
        logger.info("starting parsing url:" + file_url)
        final_json_path = download_and_process_file(file_url, zb_type)
        if not final_json_path:
            return jsonify({'error': 'File processing failed'}), 500
        response = generate_response(final_json_path)
        return response
    except Exception as e:
        logger.error('Exception occurred: ' + str(e))
        return jsonify({'error': str(e)}), 500

def download_and_process_file(file_url, zb_type):
    """
    下载并处理文件，根据zb_type选择处理函数。

    参数:
        file_url (str): 文件的URL地址。
        zb_type (int): 标的类型，1表示工程标，2表示货物标。

    返回:
        str: 处理后的文件路径。
    """
    logger = g.logger
    output_folder = g.output_folder
    filename = "ztbfile"
    downloaded_filename = os.path.join(output_folder, filename)

    downloaded_filepath, file_type = download_file(file_url, downloaded_filename)

    if downloaded_filepath is None or file_type == 4:
        logger.error("Unsupported file type or failed to download file")
        return None

    logger.info("Local file path: " + downloaded_filepath)
    processed_file_path = little_parse_main(output_folder, downloaded_filepath, file_type, zb_type, g.unique_id)
    return processed_file_path

def generate_response(final_json_path):
    logger = g.logger
    if not final_json_path:
        logger.error('Empty or None path provided for final_json.')
        return jsonify({'error': 'No path provided for final_json.'}), 400
    if not os.path.exists(final_json_path):
        logger.error('final_json not found at path: ' + final_json_path)
        return jsonify({'error': 'final_json not found'}), 404
    with open(final_json_path, 'r', encoding='utf-8') as f:
        zbparse_data = json.load(f)
        json_str = json.dumps(zbparse_data, ensure_ascii=False)
    return jsonify({
        'message': 'Little Parse processed successfully',
        'filename': os.path.basename(final_json_path),
        'data': json_str
    })