import datetime
import os
import urllib.request
import urllib.error
import json

restaurant_info = [
  [ "(TaY) Amica Minerva", "http://www.amica.fi/minerva", "", "middle", "http://www.amica.fi/api/restaurant/menu/week?language=fi&restaurantPageId=7381" ],
  [ "(TaY) Tampereen normaalikoulun ravintola", "http://www.amica.fi/tampereennormaalikoulu", "", "middle", "http://www.amica.fi/api/restaurant/menu/week?language=fi&restaurantPageId=6655" ],
  [ "(TTY) Ravintola Reaktori", "http://www.amica.fi/reaktori", "", "middle", "http://www.amica.fi/api/restaurant/menu/week?language=fi&restaurantPageId=69171" ]
]

def get_restaurants(use_old, week):
    today = datetime.date.today()
    week_day = today.isocalendar()[2]
    this_monday = today - datetime.timedelta(days=week_day-1)
    week_date = this_monday.strftime("%Y-%m-%d")
    restaurants = []
    for count, info in enumerate(restaurant_info):
        title = info[0]
        url = info[4]
        temp_fname = "amica_{count}.temp.js".format(count = count)
        url = "{url}&weekDate={week_date}".format(url=url, week_date=week_date)
        if not use_old or not os.path.isfile(temp_fname):
            try:
                urllib.request.urlretrieve(url, temp_fname)
            except urllib.error.HTTPError as e:
                print("Failed to download {url}".format(url=url))
        try:
            with open(temp_fname, "r", encoding="utf-8") as fin:
                data = json.load(fin)
        except OSError as e:
            continue

        week_foods = {}
        lunch_menus = data["LunchMenus"]
        for week_day, lunch_menu in enumerate(lunch_menus):
            current_day_foods = []
            set_menus = lunch_menu["SetMenus"]
            html = lunch_menu["Html"]
            if len(html):
                menus = html.split("<p>")
                for set_menu in menus:
                    meals = set_menu.split("<br />")
                    food = []
                    for meal in meals:
                        parts = meal.split("(")
                        current_food = parts[0]
                        diets = [s.strip() for s in parts.split(")")[0].split(",")]
                        if diets:
                            current_food += " ({allergies})".format(allergies=", ".join(diets))
                        food.append(current_food)
                    current_day_foods.append("\n".join(food))
            else:
                for set_menu in set_menus:
                    meals = set_menu["Meals"]
                    food = []
                    for meal in meals:
                        current_food = meal["Name"]
                        if "Diets" in meal:
                            current_food += " ({allergies})".format(allergies=", ".join(meal["Diets"]))
                        food.append(current_food)
                    current_day_foods.append("\n".join(food))
            week_foods[week_day] = current_day_foods

        restaurants.append([title, "", week, week_foods, info])
    return restaurants