import svgwrite
import random
import time
from math import factorial,sin,cos,pi
from itertools import permutations
import tsp as m_tsp

def dist(p1,p2):
    return dist2(p1,p2)**0.5


def dist2(p1,p2):
    diff=0
    for a,b in zip(p1,p2):
        diff+=(a-b)**2
    return diff


def tsp(points):
    res=[]
    for idx in m_tsp.tsp(points)[1]:
        res.append(points[idx])
    return res


def make_points(n,size,min_dist=0):
    min_dist*=min_dist
    points=[]
    while len(points)<n:
        px,py=random.random(),random.random()
        px*=size/2
        py*=size/2
        px+=70
        py+=70
        valid=True
        for p in points:
            if dist2(p,(px,py))<min_dist:
                valid=False
                break
        if valid:
            points.append((px,py))
            print("{}/{}".format(len(points),n))
    return points
def generate(seed,name=None,small=False):
    sd=1
    if small:
        sd=2
    random.seed(seed)
    w=2
    max_rings=3
    num_points=5
    min_dist=10+10+20*(max_rings+1)
    base_r=10
    ring_step=lambda v:10+v*10
    size=1000
    if name is None:
        name=seed
    dwg=svgwrite.Drawing(filename="out/{}.svg".format(name))
    dwg.defs.add(dwg.style(".background { fill: #222; }"))
    dwg.add(dwg.rect(size=('100%','100%'), class_='background'))
    print("Generating points...")
    color="#eee"
    pos=make_points(num_points,size,min_dist=min_dist)
    print("TSP...")
    pos=tsp(pos)
    for (x1,y1),(x2,y2) in zip(pos,pos[1:]):
        if small:
            x1/=sd
            x2/=sd
            y1/=sd
            y2/=sd
        line=dwg.add(dwg.line((x1,y1),(x2,y2),stroke_width=w,stroke=color))

    for (px,py) in pos:
        base_r=3
        if small:
            base_r=5
            px/=sd
            py/=sd
        if random.random()>0.8:
            dwg.add(dwg.circle((px,py),r=base_r+random.random()*base_r,stroke_width=w,stroke='#0ae')).fill('#0ae')
        else:
            dwg.add(dwg.circle((px,py),r=base_r+random.random()*base_r,stroke_width=w,stroke=color)).fill(color)
        r=base_r
        for _ in range(random.randint(1,max_rings)):
            if small:
                random.random()
                random.random()
                random.random()
                continue
            r+=ring_step(random.random())
            ring_col=color
            if random.random()>0.75:
                ring_col="#ea0"
            circ=dwg.add(dwg.circle((px,py),r=r,stroke_width=w,stroke=ring_col))
            circ.fill(color,opacity=0)
            d=random.random()*pi*2
            dx=cos(d)
            dy=sin(d)
            m=random.random()
            moon=dwg.add(dwg.circle((px+dx*r,py+dy*r),r=2+2*m,stroke_width=w,stroke=ring_col))
            moon.fill(ring_col)

    dwg.save()


seed=-4
generate(seed,"icon_1",small=False)
generate(seed,"icon_1_small",small=True)