# libraries
import pygame
import time
from pyglet.gl import *  # for blocky textures

# other files of this project
import project_constants as const
import minefield as mf
import searching_algorithms.bfs as bfs
from display_assets import display_sapper


def main():
    pygame.init()
    pygame.display.set_caption(const.V_NAME_OF_WINDOW)

    # FPS clock
    clock = pygame.time.Clock()

    # for blocky textures
    glEnable(GL_TEXTURE_2D)
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST)

    # create an instance of Minefield, pass necessary data
    minefield = mf.Minefield(const.MAP_RANDOM_10x10)

    # get sequence of actions found by BFS algorythm
    action_sequence = bfs.graphsearch(initial_state=bfs.State(row=minefield.agent.position[0],
                                                              column=minefield.agent.position[1],
                                                              direction=const.Direction.UP),
                                      minefield=minefield)

    running = True
    while running:
        # FPS control
        clock.tick(const.V_FPS)

        # ================ #
        # === GRAPHICS === #
        # ================ #

        # background grid (fills frame with white, blits grid)
        const.SCREEN.fill((255, 255, 255))
        const.SCREEN.blit(
            const.ASSET_BACKGROUND,
            (
                const.V_SCREEN_PADDING,
                const.V_SCREEN_PADDING
            )
        )

        # draw tiles and mines
        minefield.draw(const.SCREEN)

        # sapper
        display_sapper(
            minefield.agent.position[0],
            minefield.agent.position[1],
            minefield.agent.direction
        )

        # update graphics after blitting
        pygame.display.update()

        # make the next move from sequence of actions
        if len(action_sequence):
            action = action_sequence.pop(0)
            if action == const.Action.ROTATE_LEFT:
                minefield.agent.rotate_left()
            elif action == const.Action.ROTATE_RIGHT:
                minefield.agent.rotate_right()
            elif action == const.Action.GO:
                minefield.agent.go()

            time.sleep(const.ACTION_INTERVAL)

        else:
            for event in pygame.event.get():

                if event.type == pygame.QUIT:
                    running = False


if __name__ == "__main__":
    main()