from gamedata.objects.base import BaseObject
from math import sqrt
import random

# Tiles object, displaying and managing the play grid

class Tiles(BaseObject):

    def __init__(self,x,y,game,nbcells=22,cellsize=32):

        super().__init__(x,y,game,nbcells*cellsize,nbcells*cellsize)

        self.nbcells = nbcells
        self.cellsize = cellsize

        self.saferadius = 3

        self.grid = self.gengrid(game.sprite_lib["collisionmap.png"])
        self.spawns = self.getspawnpoints(self.grid,saferadius=self.saferadius)

        self.debugcell = game.pygame.Surface([cellsize]*2)
        self.debugcell.fill([255]*3)
        self.debugcell.set_alpha(100)

    def gengrid(self,sprite):
        # Generating a list of lists based on an image
        width,height = sprite.get_size()
        grid = []
        for y in range(height):
            line = []
            for x in range(width):
                if sprite.get_at((x,y))!=(0,0,0,255):
                    line.append(1)
                else:
                    line.append(0)
            grid.append(line)

        return grid

    def getspawnpoints(self,grid,saferadius=2):
        spawns = []
        for y in range(saferadius,len(grid)-saferadius):
            for x in range(saferadius,len(grid[y])-saferadius):
                canspawn = True
                for safey in range(-saferadius,saferadius+1):
                    for safex in range(-saferadius,saferadius+1):
                        if grid[y+safey][x+safex]==0: # If a pit is inside the radius, can't spawn here
                            canspawn = False
                if canspawn:
                    spawns.append([self.rect[0]+(x+0.5)*self.cellsize,self.rect[1]+(y+0.5)*self.cellsize])
        return spawns

    def draw(self):
        # Drawing the ground
        self.game.window.blit(self.game.sprite_lib["ingame.png"],(-self.game.globals["camerax"],-self.game.globals["cameray"]))
        if self.game.globals["debug"]:
            # Drawing the grid
            for y in range(len(self.grid)):
                for x in range(len(self.grid[y])):
                    if self.grid[y][x]==1:
                        self.game.window.blit(self.debugcell,[self.rect[0]+x*self.cellsize-self.game.globals["camerax"],self.rect[1]+y*self.cellsize-self.game.globals["cameray"]])
            # Draw spawn points
            for point in self.spawns:
                self.game.pygame.draw.circle(self.game.window,[100,100,0],[point[0]-self.game.globals["camerax"],point[1]-self.game.globals["cameray"]],radius=3)