# file_uploader.py
import os
from flask import request, jsonify

from db_utils.files import insert_url

# 上传目录
UPLOAD_FOLDER = '../uploads'
if not os.path.exists(UPLOAD_FOLDER):
    os.makedirs(UPLOAD_FOLDER)

# 允许的文件扩展名
ALLOWED_EXTENSIONS = {'png', 'jpg', 'jpeg', 'gif', 'pdf','mp4'}


def allowed_file(filename):
    """检查文件类型是否允许"""
    return '.' in filename and filename.rsplit('.', 1)[1].lower() in ALLOWED_EXTENSIONS


def upload_file():
    """处理文件上传"""
    # 检查请求中是否有文件
    if 'file' not in request.files:
        return jsonify({'error': 'No file part'}), 400

    file = request.files['file']

    # 检查文件是否为空
    if file.filename == '':
        return jsonify({'error': 'No selected file'}), 400

    # 检查文件是否符合要求
    if file and allowed_file(file.filename):
        # 保存文件到服务器
        filename = os.path.join(UPLOAD_FOLDER, file.filename)
        file.save(filename)

        # 返回文件的下载链接
        download_url = f'http://127.0.0.1:5000/download/{file.filename}'

        if not download_url:
            return jsonify({"error": "Missing name or origin"}), 400

        try:
            insert_url(download_url)
        except Exception as e:
            return jsonify({"error": str(e)}), 500

        return jsonify({'message': 'File uploaded successfully', 'download_url': download_url}), 200

    return jsonify({'error': 'File type not allowed'}), 400