# -*- coding: utf-8 -*-
#
#    Copyright © 2024 Simon Forman
#
#    This file is part of game
#
#    game is free software: you can redistribute it and/or modify
#    it under the terms of the GNU General Public License as published by
#    the Free Software Foundation, either version 3 of the License, or
#    (at your option) any later version.
#
#    game is distributed in the hope that it will be useful,
#    but WITHOUT ANY WARRANTY; without even the implied warranty of
#    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#    GNU General Public License for more details.
#
#    You should have received a copy of the GNU General Public License
#    along with game.  If not see <http://www.gnu.org/licenses/>.
#
from random import randint, expovariate, seed
from poisson import poisson


seed(23)

MINIMUM_DISTANCE_BETWEEN_STARS = 160
WIDTH, HEIGHT = 10240, 7680


TABLES = [
    'create table stars (x INTEGER, y INTEGER, radius INTEGER)',
    ]


def generate_stars(width, height, minimum_distance_between_stars):
    for x, y in poisson(width, height, minimum_distance_between_stars):
        yield x, y, round(1 + expovariate(1))


def init_db(conn):
    print('Generating star data.')
    c = conn.cursor()
    for values in generate_stars(WIDTH, HEIGHT, MINIMUM_DISTANCE_BETWEEN_STARS):
        c.execute('insert into stars values (?, ?, ?)', values)
    c.close()
    conn.commit()


def iter_stars(conn):
    c = conn.cursor()
    c.execute('select x, y, radius from stars')
    yield from c.fetchall()
    c.close()