# -*- coding:utf-8 -*-
# title           :组成文本的星球群（自定义星球）
# description     :组成文本的星球群（自定义星球）
# author          :Python超人
# date            :2023-03-26
# link            :https://gitcode.net/pythoncr/
# python_version  :3.8
# ==============================================================================
from bodies import FixedStar, ColorBody, Earth, Sun
from common.consts import SECONDS_PER_HOUR, SECONDS_PER_DAY, SECONDS_PER_WEEK
from sim_scenes.func import ursina_run, create_sphere_sky
from sim_scenes.funny.utils.body_utils import gen_bodies_from_image
from sim_scenes.universe_sim_scenes import UniverseSimScenes
from simulators.ursina.ursina_event import UrsinaEvent

D = 6000  # 基本距离单位:km（随意赋值）


def create_earth(name, texture, scale):
    earth = Earth(name=name, texture=texture, rotate_angle=-23.44,
                  mass=2e32, size_scale=5 * scale,
                  init_position=[-450 * D, 100 * D, 6000 * D],  # [ 左-右+, 上+下-, 远+近- ]
                  init_velocity=[0, 0, 0],
                  ignore_mass=True)
    return earth


def show_text_bodies():
    """
    显示图片文本的星球群
    """

    # 观看摄像机的位置
    # camera_pos = (左-右+, 上+下-, 前+后-)
    camera_pos = (D, D, -3000 * D)
    # 根据 pixel_image 指定图片生成有色星球（注意：图片的像素不要太多）
    bodies = gen_bodies_from_image(
        pixel_image="./images/ilovechina.png",
        texture="color_moon.png",
        params={"camera_pos": camera_pos}, light_disable=False)

    # 放一个恒星作为背景
    # TODO: ignore_mass=True
    #  注意：这里的算法是基于牛顿的万有引力（质量为0不受引力的影响在天体物理学中是不严谨）
    sun = FixedStar(init_position=[camera_pos[0], camera_pos[1], camera_pos[2] * 30],
                    texture="fixed_star.png", color=(255, 255, 225), size_scale=20)
    # glows = (glow_num:10, glow_scale:1.03 glow_alpha:0.1~1 glow_color_min_val)
    sun.glows = (10, 1.05, 0.1)
    bodies.append(sun)

    earth = create_earth(name="背景地球", texture="earth-huge.jpg", scale=1)
    earth_cn = create_earth(name="背景地球", texture="earth-huge-cn-flag.png", scale=1.01)
    earth_clouds = create_earth(name="地球云层", texture="transparent_clouds.png", scale=1.005)

    bodies.append(earth)
    bodies.append(earth_cn)
    bodies.append(earth_clouds)

    def on_ready():
        # from simulators.ursina.entities.entity_utils import create_directional_light
        # # 运行前触发
        # # 为了较好的立体效果，可以增加太阳光线，光线指向木星（target=jupiter）
        # create_directional_light(position=(200, 0, -300), light_num=3, target=earth)
        from ursina import camera
        # camera.fov = 40
        sky = create_sphere_sky(scale=800000)
        sky.rotation_y = 180
        # sky.rotation_x = 20
        # sky.rotation_z = -65

    UrsinaEvent.on_ready_subscription(on_ready)
    UniverseSimScenes.set_window_size((1920, 1079), False)
    # 使用 ursina 查看的运行效果
    # 常用快捷键： P：运行和暂停  O：重新开始  I：显示天体轨迹
    # position = camera_pos = (左-右+, 上+下-, 前+后-)
    ursina_run(bodies, SECONDS_PER_HOUR,
               cosmic_bg='',
               show_grid=False,
               position=camera_pos, view_closely=True)


if __name__ == '__main__':
    show_text_bodies()