from Empty import Empty
from Moving_truck import Moving_truck
from Package import Package
from Package_types import Package_types
from Shelf import Shelf
import pygame
import random
from Grid import Grid
from Truck import Truck
from Global_variables import Global_variables as G_var
from pygame.constants import *

from astar import Pathfinding, State


class Environment:
    def __init__(self, window):
        self.window = window
        self.grid = Grid(window)
        self.initialize_eviroment_2d()
        self.add_shelfs_to_enviroment_2d()
        # TEST CREATE PACKAGE
        new_package = Package(self.window, 26, 7)
        self.enviroment_2d[26][7] = new_package
        new_truck = Truck(window, 14, 7)
        self.enviroment_2d[14][7] = new_truck
        self.truck = new_truck
        self.moving_truck = Moving_truck(
            self.window, self.enviroment_2d, self.truck)
        self.astar = Pathfinding(self.enviroment_2d)

    def draw_all_elements(self):
        for row in self.enviroment_2d:
            for field in row:
                field.draw()
        self.grid.draw_grid()
        self.use_astar() # w przyszlosci trzeba przeniesc funkcje w jakies logiczniejsze miejsce np funkcje update()
        self.astar.draw_path(self.window)
        pygame.display.flip()
    
    def use_astar(self):
        start_state = State(1,self.truck.x,self.truck.y)
        package = self.find_packate()
        end_state = State(1,package.x, package.y)
        self.astar.find_path(start_state,end_state)
    
    def find_packate(self):   #ta funkcja została zrobiona na szybko, może nie być potrzebna w przyszłości kiedy
        #ktoś wpadnie na lepsze rozwiązanie
        for row in self.enviroment_2d:
            for field in row:
                if isinstance(field,Package):
                    return field
        return None

    def update_truck(self, event):
        if event.type == KEYDOWN:
            if event.key == K_LEFT:
                self.moving_truck.move(-1, 0)
            if event.key == K_RIGHT:
                self.moving_truck.move(1, 0)
            if event.key == K_UP:
                self.moving_truck.move(0, -1)
            if event.key == K_DOWN:
                self.moving_truck.move(0, 1)

    def gen_shelf_type(self):
        shelve_types = list(Package_types)
        while True:
            yield random.choice(shelve_types)

    def initialize_eviroment_2d(self):
        self.enviroment_2d = [[
            Empty(self.window, j, i)
            for i in range(G_var().DIMENSION_Y)]
            for j in range(G_var().DIMENSION_X)
        ]

    def add_shelfs_to_enviroment_2d(self):
        shelf_2_offset = 9
        avaiable_types = self.gen_shelf_type()
        for x in range(2, 22, 3):
            type_of_new_shelf_1 = next(avaiable_types)
            type_of_new_shelf_2 = next(avaiable_types)
            for y in range(0, 6):
                self.enviroment_2d[x][y] = Shelf(
                    self.window, x, y, type_of_new_shelf_1
                )
                self.enviroment_2d[x][y + shelf_2_offset] = Shelf(
                    self.window, x, (y + shelf_2_offset), type_of_new_shelf_2
                )