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

# other files of this project
import project_constants as const
import minefield as mf
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)

    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],
            const.Direction.UP
        )

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

        # ============== #
        # === EVENTS === #
        # ============== #

        for event in pygame.event.get():

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

            # Assigning all input from keyboard as variables into an array
            keys = pygame.key.get_pressed()

            # Depending on what key we press, the agent will move in that direction
            # DISCRETION : The only keys that are available are arrow keys
            # DISCRETION : is_valid_move is a new brand function that now plays a critical role in movement of our Agent (It is NOT just the  "check up" function anymore)
            if keys[pygame.K_RIGHT]:
                target_row, target_column = minefield.agent.go_right()
                minefield.is_valid_move(target_row, target_column)

            elif keys[pygame.K_LEFT]:
                target_row, target_column = minefield.agent.go_left()
                minefield.is_valid_move(target_row, target_column)
                
            elif keys[pygame.K_UP]:
                target_row, target_column = minefield.agent.go_up()
                minefield.is_valid_move(target_row, target_column)

            elif keys[pygame.K_DOWN]:
                target_row, target_column = minefield.agent.go_down()
                minefield.is_valid_move(target_row, target_column)


if __name__ == "__main__":
    main()