import os
import re
import time
import numpy as np
from flask import Blueprint, request, jsonify
from PIL import Image

from app.models.sql_factory import search_by_phash, add_phash
from app.utils.im_utils import pil2np

sanitize_re = re.compile('[\W]+')
valid_exts = ['.gif', '.jpg', '.jpeg', '.png']

LIMIT = 9

api = Blueprint('api', __name__)

@api.route('/')
def index():
  """
  API status test endpoint
  """
  return jsonify({ 'status': 'ok' })

@api.route('/v1/match/', methods=['POST'])
def upload():
  """
  Search by uploading an image
  """
  start = time.time()

  file = request.files['query_img']
  fn = file.filename
  if fn.endswith('blob'): # FIX PNG IMAGES?
    fn = 'filename.jpg'

  basename, ext = os.path.splitext(fn)
  if ext.lower() not in valid_exts:
    return jsonify({
      'error': 'not_an_image'
    })

  im = Image.open(file.stream).convert('RGB')
  phash = compute_phash_int(im)

  threshold = request.args.get('threshold') || 6

  res = search_by_phash(phash, threshold)

  return jsonify({ 'res': res })