import operator
import logging
import random

# Logging to console
logger = logging.getLogger(__name__)
logging.basicConfig(level=logging.INFO) # Set loglevel to INFO or higher to prevent console spam.


"""
Helper functions
"""
# Return some hex colour
"""
Waiting for Stanford to fix a bug in the environment
CIP bug: https://codeinplace.stanford.edu/cip6/report?post=ac7c4ffd-1f90-475a-b4ee-2e5b73c5348f

from matplotlib import colors
import decimal

def get_random_colour():
    return decimal.Decimal(random.randrange(0,10)/10), decimal.Decimal(random.randrange(0,10)/10), decimal.Decimal(random.randrange(0,10)/10)

colour = colors.rgb2hex((get_random_colour()))
background = colors.rgb2hex((get_random_colour()))
"""
def generate_random_colour():
    # Generate random RGB values
    rgb_values = [random.randrange(256), random.randrange(256), random.randrange(256)]

    # Convert to HEX values
    hex_colours = [hex(value)[2:] for value in rgb_values]  # Strip the '0x' prefix
    
    # Add leading "0" for single digit values
    for i in range(len(hex_colours)):
        if len(str(hex_colours[i])) == 1:
            hex_colours[i] = f"0{hex_colours[i]}"
    
    # Add leading "#" to hex values
    colour = '#' + ''.join(hex_colours)

    logger.debug(f"Generated random colour: {colour}")
    return colour


"""
Asset functions
"""
# Draw a background with random colour on the canvas
def generate_random_background(canvas):
    background = canvas.create_rectangle(
        1, 
        1, 
        canvas.width, 
        canvas.height,
        generate_random_colour(),
        generate_random_colour()
    )

    return background

# Erase a passed Karel from the canvas
def erase_asset(asset):
    canvas = asset[1][0]

    # Erase each shape of the asset
    for shape in asset[0].values():
        canvas.delete(shape)
    logger.debug(f"Erased asset: {asset}")

# Move a passed Karel on the canvas
"""
Waiting for Stanford to fix a bug in the environment
CIP bug: https://codeinplace.stanford.edu/cip6/report?post=7043ece9-7653-4e39-8a63-5f4544b1d74b

def move_karel(canvas, karel, x, y):
    for shape in karel[0].values():
        canvas.move(shape, x, y)
    logger.debug(f"Moved: {karel} by {x} horizontally, {y} vertically")
"""
# Move a passed asset relative to previous position
def relative_move_asset(asset, x:int=0, y:int=0):
    # Update coordinates in list
    asset[1][1] += x
    asset[1][2] += y

    # Replace asset
    erase_asset(asset)
    new_asset = draw_karel(asset[1][0], asset[1][1], asset[1][2], asset[1][3], asset[1][4], asset[1][5], asset[1][6], asset[1][7])

    logger.debug(f"Moved {asset} by {x} horizontally, {y} vertically, to {new_asset}")
    return new_asset

# Move a passed asset in relation to her orientation
def orientation_move_asset(asset, direction, amount):
    # Direction translation
    # East
    if asset[1][4].startswith("east"):
        if direction.lower() == "forward" or direction.lower() == "front":
            asset[1][1] += amount
        if direction.lower() == "left":
            asset[1][2] -= amount
        if direction.lower() == "right":
            asset[1][2] += amount
        if direction.lower() == "backward" or direction.lower() == "back":
            asset[1][1] -= amount

    # North
    if asset[1][4].startswith("north"):
        if direction.lower() == "forward" or direction.lower() == "front":
            asset[1][2] -= amount
        if direction.lower() == "left":
            asset[1][1] -= amount
        if direction.lower() == "right":
            asset[1][1] += amount
        if direction.lower() == "backward" or direction.lower() == "back":
            asset[1][2] += amount

    # West
    if asset[1][4].startswith("west"):
        if direction.lower() == "forward" or direction.lower() == "front":
            asset[1][1] -= amount
        if direction.lower() == "left":
            asset[1][2] += amount
        if direction.lower() == "right":
            asset[1][2] -= amount
        if direction.lower() == "backward" or direction.lower() == "back":
            asset[1][1] += amount

    # South
    if asset[1][4].startswith("south"):
        if direction.lower() == "forward" or direction.lower() == "front":
            asset[1][2] += amount
        if direction.lower() == "left":
            asset[1][1] += amount
        if direction.lower() == "right":
            asset[1][1] -= amount
        if direction.lower() == "backward" or direction.lower() == "back":
            asset[1][2] -= amount

    # Replace asset
    erase_asset(asset)
    new_karel = draw_karel(asset[1][0], asset[1][1], asset[1][2], asset[1][3], asset[1][4], asset[1][5], asset[1][6], asset[1][7])

    logger.debug(f"Moved: {asset} {direction} by {amount} as {new_karel}")
    return new_karel

# Move a passed asset to new coordinates
def absolute_move_asset(asset, x, y):
    # Update coordinates in list
    asset[1][1] = x
    asset[1][2] = y

    # Replace asset
    erase_asset(asset)
    new_karel = draw_karel(asset[1][0], asset[1][1], asset[1][2], asset[1][3], asset[1][4], asset[1][5], asset[1][6], asset[1][7])

    logger.debug(f"Moved: {asset} by {x} horizontally, {y} vertically, to {new_karel}")
    return new_karel

# Change the orientation of a passed asset
def rotate_asset(asset, direction):
    # Relative turn
    if direction == "right" or direction == "left":
        # East
        if asset[1][4] == "east":
            if direction == "right":
                asset[1][4] = "south"
            if direction == "left":
                asset[1][4] = "north"
        elif asset[1][4] == "east-flipped":
            if direction == "right":
                asset[1][4] = "south-flipped"
            if direction == "left":
                asset[1][4] = "north-flipped"

        # North
        elif asset[1][4] == "north":
            if direction == "right":
                asset[1][4] = "east"
            if direction == "left":
                asset[1][4] = "west"
        elif asset[1][4] == "north-flipped":
            if direction == "right":
                asset[1][4] = "east-flipped"
            if direction == "left":
                asset[1][4] = "west-flipped"

        # West
        elif asset[1][4] == "west":
            if direction == "right":
                asset[1][4] = "north"
            if direction == "left":
                asset[1][4] = "south"
        elif asset[1][4] == "west-flipped":
            if direction == "right":
                asset[1][4] = "north-flipped"
            if direction == "left":
                asset[1][4] = "south-flipped"

        # South
        elif asset[1][4] == "south":
            if direction == "right":
                asset[1][4] = "west"
            if direction == "left":
                asset[1][4] = "east"
        elif asset[1][4] == "south-flipped":
            if direction == "right":
                asset[1][4] = "west-flipped"
            if direction == "left":
                asset[1][4] = "east-flipped"
    
    # Absolute rotation
    elif direction == "east" or direction == "east-flipped" or direction == "north" or direction == "north-flipped" or direction == "west" or direction == "west-flipped" or direction == "south" or direction == "south-flipped":
        asset[1][4] = direction
    
    # Syntax error
    else:
        logger.error(f"Invalid rotation direction: {direction}")

    # Repalce asset
    erase_asset(asset)
    new_karel = draw_karel(asset[1][0], asset[1][1], asset[1][2], asset[1][3], asset[1][4], asset[1][5], asset[1][6], asset[1][7])

    logger.debug(f"Rotated Karel: {asset} by {direction} as {asset[1][4]} to {new_karel}")
    return new_karel

# Recolour a passed asset on the canvas
"""
Waiting for Stanford to fix a bug in the environment
CIP bug: https://codeinplace.stanford.edu/cip6/report?post=c36ed931-3019-4830-8ba6-655c1a513471

def recolour_karel(canvas, karel, colour:str="black", background:str="white"):
    for name, shape in karel[0].items():   # Loop over Karel dict
        if name.endswith("_fill"): # Background shape
            canvas.set_color(shape, background)
            canvas.set_outline_color(shape, background)
        else:   # Foreground shape
            if name.endswith("_line") or name.endswith("_corner") or name == "mouth":
                canvas.set_color(shape, colour)
            elif name == "eye":
                #canvas.set_color(shape, "transparent")
                canvas.set_outline_color(shape, colour)
            else:   # Legs and feet
                canvas.set_color(shape, colour)
                canvas.set_outline_color(shape, colour)
"""
def recolour_asset(asset, colour:str="black", background:str="white"):
    # Random colours
    if colour == "random":
        colour = generate_random_colour()
    if background == "random":
        background = generate_random_colour()

    # Update colours in list
    asset[1][5] = colour
    asset[1][6] = background

    # Replace asset
    erase_asset(asset)
    new_karel = draw_karel(asset[1][0], asset[1][1], asset[1][2], asset[1][3], asset[1][4], asset[1][5], asset[1][6], asset[1][7])

    logger.debug(f"Re-coloured Karel: {asset} with {colour} and {background} to {new_karel}")
    return new_karel

# Draw a random asset on the canvas
def generate_random_asset(canvas):
    pass

"""
Karel functions
"""
# Draw a random Karel outside the canvas
def generate_outofbounds_random_karel(canvas, side):
    # Base the size on the shortest pane
    if canvas.width < canvas.height:
        size = random.randint(1, canvas.width)
    else:
        size = random.randint(1, canvas.height)
    
    # Generate random coordinates (Outside the canvas geometry)
    match side:
        case "left":
            centre_x = int(0 - size / 2 - 1)
            centre_y = random.randint(int(size / 2), int(canvas.height - size / 2))
        case "top":
            centre_x = random.randint(int(size / 2), int(canvas.height - size / 2))
            centre_y = int(0 - size / 2 - 1)
        case "right":
            centre_x = int(0 + size / 2 + 1)
            centre_y = random.randint(int(size / 2), int(canvas.height - size / 2))
        case "bottom":
            centre_x = random.randint(int(size / 2), int(canvas.height - size / 2))
            centre_y = int(0 + size / 2 + 1)
    
    # Generate random values
    orientation = random.choice(["east", "east-flipped", "north", "north-flipped", "west", "west-flipped", "south", "south-flipped"])
    transparent = random.choice((True, False, False))

    return draw_karel(canvas, centre_x, centre_y, size, orientation, "random", "random", transparent)
    
# Draw a random Karel on the canvas
def generate_random_karel(canvas):
    # Base the size on the shortest pane
    if canvas.width < canvas.height:
        size = random.randint(1, canvas.width)
    else:
        size = random.randint(1, canvas.height)
    
    # Generate random values (Inside the canvas geometry)
    centre_x = random.randint(int(size / 2), int(canvas.width - size / 2))
    centre_y = random.randint(int(size / 2), int(canvas.height - size / 2))
    orientation = random.choice(["east", "east-flipped", "north", "north-flipped", "west", "west-flipped", "south", "south-flipped"])
    transparent = random.choice((True, False, False, False))

    return draw_karel(canvas, centre_x, centre_y, size, orientation, "random", "random", transparent)

# Draw a Karel
def draw_karel(
        canvas,
        centre_x:int=25,
        centre_y:int=25,
        size:int=50,
        orientation:str="east",
        colour:str="black",
        background:str="white",
        transparent:bool=False
    ):
    
    # Body constants
    MARGIN = size / 8
    APPENDAGE_MULTIPLIER = MARGIN * 0.6
    
    # Random colours
    if colour == "random":
        colour = generate_random_colour()
    if background == "random":
        background = generate_random_colour()

    ''' Flipper case
    In order to be able to flip Karel, the operands in the forumlas must be able to switch around.
    Orientations are in relation to the centre of Karel.
    '''
    match orientation.lower():     
        case "east" | "south-flipped":
            left_operand = operator.sub     # Left / Top
            top_operand = operator.sub      # Top / Left
            right_operand = operator.add    # Right / Bottom
            bottom_operand = operator.add   # Bottom / Right
        case "east-flipped" | "south":
            left_operand = operator.sub     # Left / Top
            top_operand = operator.add      # Bottom / Right
            right_operand = operator.add    # Right / Bottom
            bottom_operand = operator.sub   # Top / Left
        case "west" | "north-flipped":
            left_operand = operator.add     # Right 
            top_operand = operator.add      # Bottom
            right_operand = operator.sub    # Left
            bottom_operand = operator.sub   # Top
        case "west-flipped" | "north":
            left_operand = operator.add     # Right / Bottom
            top_operand = operator.sub      # Top / Left
            right_operand = operator.sub    # Left / Top
            bottom_operand = operator.add   # Bottom / Right
    
    """ Coords case
    X and Y need to be swapped in case of a North or South facing Karel, yet the original vlaues have to be returned. (To prevent diagonal relative translation)
    """
    if orientation.lower() == "north" or orientation.lower() == "north-flipped" or orientation.lower() == "south" or orientation.lower() == "south-flipped":
        x = centre_y
        y = centre_x
    else:
        x = centre_x
        y = centre_y

    # Borders
    left = left_operand(x, size / 2)
    top = top_operand(y, size / 2)
    right = right_operand(x, size / 2)
    bottom = bottom_operand(y, size / 2)
    margin = size / 8
    appendage_multiplier = margin * 0.6

    # Body borders
    body_left = left_operand(x, size / 3)
    body_top = top
    body_right = right_operand(x, size / 3)
    body_bottom = bottom_operand(y, size / 2.6)
    eye_left = right_operand(body_left, margin)
    eye_top = bottom_operand(body_top, margin)
    eye_right = left_operand(body_right, margin)
    eye_bottom = top_operand(body_bottom, margin * 2)

    # Body coordinates
    top_left_corner = body_left, body_top
    left_diagonal_top = body_left, top_operand(body_bottom, margin)
    left_diagonal_bottom = eye_left, body_bottom
    right_diagonal_top = eye_right, body_top
    right_diagonal_bottom = body_right, bottom_operand(body_top, margin)
    bottom_right_corner = body_right, body_bottom
    mouth_left_corner = x, bottom_operand(eye_bottom, margin)
    mouth_right_corner = eye_right, mouth_left_corner[1]

    # Left appendage borders
    leftLeg_left = left_operand(body_left, margin)
    leftLeg_top = eye_bottom
    leftLeg_right = body_left
    leftLeg_bottom = bottom_operand(leftLeg_top, appendage_multiplier)
    leftFoot_left = leftLeg_left
    leftFoot_top = leftLeg_bottom
    leftFoot_right = right_operand(leftLeg_left, appendage_multiplier)
    leftFoot_bottom = bottom_operand(leftFoot_top, appendage_multiplier)

    # Right appendage borders
    rightLeg_left = x
    rightLeg_top = body_bottom
    rightLeg_right = right_operand(rightLeg_left, appendage_multiplier)
    rightLeg_bottom = bottom
    rightFoot_left = rightLeg_right
    rightFoot_top = top_operand(bottom, appendage_multiplier)
    rigthFoot_right = right_operand(rightLeg_right, appendage_multiplier)
    rightFoot_bottom = bottom

    # Draw Karel
    match orientation.lower():
        case "east" | "east-flipped" | "west" | "west-flipped":
            if not transparent:
                # Meat
                top_fill = canvas.create_rectangle(
                    top_left_corner[0],
                    top_left_corner[1],
                    right_diagonal_top[0],
                    eye_top,
                    background,
                    background
                )
                top_corner_fill = canvas.create_polygon(
                    right_diagonal_top[0] , right_diagonal_top[1],
                    right_diagonal_bottom[0], right_diagonal_bottom[1],
                    eye_right, eye_top,
                    color = background,
                    outline = background
                )
                left_fill = canvas.create_rectangle(
                    top_left_corner[0],
                    eye_top,
                    eye_left,
                    left_diagonal_top[1],
                    background,
                    background
                )
                right_fill = canvas.create_rectangle(
                    eye_right,
                    eye_top,
                    right_diagonal_bottom[0],
                    eye_bottom,
                    background,
                    background
                )
                bottom_fill = canvas.create_rectangle(
                    eye_left,
                    eye_bottom,
                    bottom_right_corner[0],
                    bottom_right_corner[1],
                    background,
                    background
                )
                bottom_corner_fill = canvas.create_polygon(
                    left_diagonal_top[0], left_diagonal_top[1],
                    eye_left, left_diagonal_top[1],
                    left_diagonal_bottom[0], left_diagonal_bottom[1],
                    color = background,
                    outline = background
                )
            
            # Outlines
            top_line = canvas.create_line(
                top_left_corner[0], top_left_corner[1],
                right_diagonal_top[0], right_diagonal_top[1],
                colour
            )
            top_corner = canvas.create_line(
                right_diagonal_top[0], right_diagonal_top[1],
                right_diagonal_bottom[0], right_diagonal_bottom[1],
                colour
            )
            left_line = canvas.create_line(
                top_left_corner[0], top_left_corner[1],
                left_diagonal_top[0], left_diagonal_top[1],
                colour
            )
            bottom_corner = canvas.create_line(
                left_diagonal_top[0], left_diagonal_top[1],
                left_diagonal_bottom[0], left_diagonal_bottom[1],
                colour
            )
            bottom_line = canvas.create_line(
                left_diagonal_bottom[0], left_diagonal_bottom[1],
                bottom_right_corner[0], bottom_right_corner[1],
                colour
            )
            right_line = canvas.create_line(
                right_diagonal_bottom[0], right_diagonal_bottom[1],
                bottom_right_corner[0], bottom_right_corner[1],
                colour
            )
            left_leg = canvas.create_rectangle(
                leftLeg_left,
                leftLeg_top,
                leftLeg_right,
                leftLeg_bottom,
                colour,
                colour
            )
            left_foot = canvas.create_rectangle(
                leftFoot_left,
                leftFoot_top,
                leftFoot_right,
                leftFoot_bottom,
                colour,
                colour
            )
            right_leg = canvas.create_rectangle(
                rightLeg_left,
                rightLeg_top,
                rightLeg_right,
                rightLeg_bottom,
                colour,
                colour
            )
            right_foot = canvas.create_rectangle(
                rightFoot_left,
                rightFoot_top,
                rigthFoot_right,
                rightFoot_bottom,
                colour,
                colour
            )
            eye = canvas.create_rectangle(
                eye_left,
                eye_top,
                eye_right,
                eye_bottom,
                "transparent",
                colour,
            )
            mouth = canvas.create_line(
                mouth_left_corner[0], mouth_left_corner[1],
                mouth_right_corner[0], mouth_right_corner[1],
                colour
            )
        
        case "north" | "north-flipped" | "south" | "south-flipped":
            if not transparent:
                # Meat
                top_fill = canvas.create_rectangle(
                    top_left_corner[1],             # Top Y
                    right_diagonal_top[0],          # Right X
                    eye_top,                        # Bottom Y
                    top_left_corner[0],             # Left X
                    background,
                    background
                )
                top_corner_fill = canvas.create_polygon(
                    right_diagonal_top[1] , right_diagonal_top[0],
                    right_diagonal_bottom[1], right_diagonal_bottom[0],
                    eye_top, eye_right,
                    color = background,
                    outline = background
                )
                left_fill = canvas.create_rectangle(
                    eye_top,
                    eye_left,
                    left_diagonal_top[1],
                    top_left_corner[0],
                    background,
                    background
                )
                right_fill = canvas.create_rectangle(
                    eye_top,
                    right_diagonal_bottom[0],
                    eye_bottom,
                    eye_right,
                    background,
                    background
                )
                bottom_fill = canvas.create_rectangle(
                    eye_bottom,
                    bottom_right_corner[0],
                    bottom_right_corner[1],
                    eye_left,
                    background,
                    background
                )
                bottom_corner_fill = canvas.create_polygon(
                    left_diagonal_top[1], left_diagonal_top[0],
                    left_diagonal_top[1], eye_left,
                    left_diagonal_bottom[1], left_diagonal_bottom[0],
                    color = background,
                    outline = background
                )
            
            # Outlines
            top_line = canvas.create_line(
                top_left_corner[1], top_left_corner[0],
                right_diagonal_top[1], right_diagonal_top[0],
                colour
            )
            top_corner = canvas.create_line(
                right_diagonal_top[1], right_diagonal_top[0],
                right_diagonal_bottom[1], right_diagonal_bottom[0],
                colour
            )
            left_line = canvas.create_line(
                top_left_corner[1], top_left_corner[0],
                left_diagonal_top[1], left_diagonal_top[0],
                colour
            )
            bottom_corner = canvas.create_line(
                left_diagonal_top[1], left_diagonal_top[0],
                left_diagonal_bottom[1], left_diagonal_bottom[0],
                colour
            )
            bottom_line = canvas.create_line(
                left_diagonal_bottom[1], left_diagonal_bottom[0],
                bottom_right_corner[1], bottom_right_corner[0],
                colour
            )
            right_line = canvas.create_line(
                right_diagonal_bottom[1], right_diagonal_bottom[0],
                bottom_right_corner[1], bottom_right_corner[0],
                colour
            )
            left_leg = canvas.create_rectangle(
                leftLeg_top,
                leftLeg_right,
                leftLeg_bottom,
                leftLeg_left,
                colour,
                colour
            )
            left_foot = canvas.create_rectangle(
                leftFoot_top,
                leftFoot_right,
                leftFoot_bottom,
                leftFoot_left,
                colour,
                colour
            )
            right_leg = canvas.create_rectangle(
                rightLeg_top,
                rightLeg_right,
                rightLeg_bottom,
                rightLeg_left,
                colour,
                colour
            )
            right_foot = canvas.create_rectangle(
                rightFoot_top,
                rigthFoot_right,
                rightFoot_bottom,
                rightFoot_left,
                colour,
                colour
            )
            eye = canvas.create_rectangle(
                eye_top,
                eye_right,
                eye_bottom,
                eye_left,
                "transparent",
                colour,
            )
            mouth = canvas.create_line(
                mouth_left_corner[1], mouth_left_corner[0],
                mouth_right_corner[1], mouth_right_corner[0],
                colour
            )

    # Return each object so it can later be altered/destroyed
    if transparent:
        shapes = {
            "top_line": top_line,
            "top_corner": top_corner,
            "left_line": left_line,
            "bottom_corner": bottom_corner,
            "bottom_line": bottom_line,
            "right_line": right_line,
            "left_leg": left_leg,
            "left_foot": left_foot,
            "right_foot": right_foot,
            "right_leg": right_leg,
            "right_foot": right_foot,
            "eye": eye,
            "mouth": mouth
        }
    else:   # Not transparent
        shapes = {
            "top_fill": top_fill,
            "top_corner_fill": top_corner_fill,
            "left_fill": left_fill,
            "right_fill": right_fill,
            "bottom_fill": bottom_fill,
            "bottom_corner_fill": bottom_corner_fill,
            "top_line": top_line,
            "top_corner": top_corner,
            "left_line": left_line,
            "bottom_corner": bottom_corner,
            "bottom_line": bottom_line,
            "right_line": right_line,
            "left_leg": left_leg,
            "left_foot": left_foot,
            "right_foot": right_foot,
            "right_leg": right_leg,
            "right_foot": right_foot,
            "eye": eye,
            "mouth": mouth
        }

    arguments = [canvas, centre_x, centre_y, size, orientation.lower(), colour, background, transparent]
    logger.debug(f"Created Karel: {shapes, arguments}")
    return [shapes, arguments]