from flask import Blueprint, request, jsonify, redirect, url_for, current_app, send_from_directory, make_response
import datetime
import os
import shutil

bp = Blueprint('api_v1', __name__, url_prefix='/api/v1')

@bp.route('/')
def hello_world():
    return redirect(url_for('static', filename='./index.html'))


@bp.route('/upload', methods=['GET', 'POST'])
def upload_file():
    file = request.files['file']
    print(datetime.datetime.now(), file.filename)
    if file and allowed_file(file.filename):
        src_path = os.path.join(bp.config['UPLOAD_FOLDER'], file.filename)
        file.save(src_path)
        shutil.copy(src_path, './tmp/ct')
        image_path = os.path.join('./tmp/ct', file.filename)
        pid, image_info = core.main.c_main(
            image_path, current_app.model, file.filename.rsplit('.', 1)[1])
        return jsonify({'status': 1,
                        'image_url': 'http://127.0.0.1:5003/tmp/ct/' + pid,
                        'draw_url': 'http://127.0.0.1:5003/tmp/draw/' + pid,
                        'image_info': image_info})

    return jsonify({'status': 0})

    # with app.app_context():
    #     current_app.model = Detector()

@bp.route("/download", methods=['GET'])
def download_file():
    # 需要知道2个参数, 第1个参数是本地目录的path, 第2个参数是文件名(带扩展名)
    return send_from_directory('data', 'testfile.zip', as_attachment=True)

@bp.route('/tmp/<path:file>', methods=['GET'])
def show_photo(file):
    ''' 显示图片 '''
    if request.method == 'GET':
        if not file is None:
            image_data = open(f'tmp/{file}', "rb").read()
            response = make_response(image_data)
            response.headers['Content-Type'] = 'image/png'
            return response


def allowed_file(filename) -> bool:
    '''判断文件后缀是否在允许范围'''
    ALLOWED_EXTENSIONS = set(['png', 'jpg'])
    return '.' in filename and filename.rsplit('.', 1)[1] in ALLOWED_EXTENSIONS