import json
from datetime import datetime
from pathlib import Path

from PIL import Image

from config import pil_image_to_surface, WIDTH, HEIGHT, SCREEN_RECT, DOMAIN, PHOTO_WIDTH, PHOTO_HEIGHT


class Event:

    def __init__(self, data: json):
        self.code = data['code']
        self.title = data['title']
        self.date = datetime.strptime(data['date'], '%Y-%m-%d')
        self.password = data['password']
        self.gallery = bool(data['gallery'])
        self.frame_factor = float(data['frame_factor']) if 'frame_factor' in data else 1.0
        self.frame_photo_sized = shrink_cover(Image.open("./data/frames/" + data['frame']), PHOTO_WIDTH, PHOTO_HEIGHT)
        self.frame = pil_image_to_surface(shrink_cover(self.frame_photo_sized, int(WIDTH * self.frame_factor), int(HEIGHT * self.frame_factor)))
        self.frame_rect = self.frame.get_rect(center=SCREEN_RECT.center)
        self.url_without_protocol = "%s/e/%s" % (DOMAIN, self.code)


def load_event() -> Event | None:
    try:
        with Path("./data/event.json").open("r") as f:
            data = json.load(f)
            return Event(data)
    except Exception as e:
        print(e)
        return None


def shrink_inside(img: Image, width: float, height: float):
    if img.width <= width and img.height <= height:
        return img
    r = img.width / img.height
    w = width
    h = width / r
    if h > height:
        h = height
        w = height * r
    return img.resize((int(w), int(h)), Image.Resampling.LANCZOS)


def shrink_cover(img: Image, width: float, height: float):
    if img.width <= width and img.height <= height:
        return img
    r = img.width / img.height
    w = width
    h = width / r
    if h < height:
        h = height
        w = height * r
    return img.resize((int(w), int(h)), Image.Resampling.LANCZOS)


def _resize2(img: Image, width: float):
    height = width / img.width * img.height
    return img.resize((int(width), int(height)), Image.Resampling.LANCZOS)