import random

from common.constants import GRID_CELL_PADDING, GRID_CELL_WIDTH, GRID_CELL_HEIGHT

class Spawner:
    def __init__(self, grid, objs_to_spawn_list: list, spawn_area_width=0, spawn_area_height=0, spawn_area_pos_row=0,
                 spawn_area_pos_column=0, spawn_where_possible=False):  # kolumny i wiersze liczymy od 0;
        self.objs_to_spawn_list = objs_to_spawn_list
        self.spawn_area_width = spawn_area_width
        self.spawn_area_height = spawn_area_height
        self.spawn_area_pos_row = spawn_area_pos_row
        self.spawn_area_pos_column = spawn_area_pos_column
        self.grid = grid
        self.spawn_where_possible = spawn_where_possible

    def spawn(self):
        if self.spawn_where_possible:
            possible_fields = self.grid.free_fields
        else:
            possible_fields = []
            for field in self.grid.free_fields:
                if (self.spawn_area_pos_column <= field.column < (self.spawn_area_width + self.spawn_area_pos_column)) \
                        and (self.spawn_area_pos_row <= field.row < (self.spawn_area_height + self.spawn_area_pos_row)):
                    possible_fields.append(field)

        for obj in self.objs_to_spawn_list:
            ran_index = random.randint(0, len(possible_fields)-1)
            ran_field = possible_fields[ran_index]
            ran_field.busy = True
            obj.rect = obj.rect.clamp(ran_field)
            self.grid.busy_fields.append(ran_field)
            if ran_field in self.grid.free_fields:
                self.grid.free_fields.remove(ran_field)
            if ran_field in possible_fields:
                possible_fields.remove(ran_field)
            obj.update()