utils/hex_grid.py

# utils/hex_grid.py
import os
import math
from PIL import Image
import cairocffi as cairo
import pangocffi
import pangocairocffi
from PIL import Image, ImageDraw, ImageChops, ImageFont #, ImageColor
#from pilmoji import Pilmoji  # Import Pilmoji for handling emojis
from utils.excluded_colors import (
    excluded_color_list,
)
from utils.image_utils import multiply_and_blend_images
from utils.color_utils import update_color_opacity, parse_hex_color, draw_text_with_emojis, hex_to_rgb
import random  # For random text options
import utils.constants as constants  # Import constants
import ast
from utils.misc import number_to_letter

def calculate_font_size(hex_size, padding=0.6, size_ceil=20, min_font_size=8):
    """
    Calculate the font size based on the hexagon size.

    Parameters:
        hex_size (int): The size of the hexagon side.
        padding (float): The fraction of the hex size to use for font size.

    Returns:
        int or None: The calculated font size or None if hex is too small.
    """
    font_size = int(hex_size * padding)
    if font_size < min_font_size:
        return None  # Hex is too small for text
    return min(font_size, size_ceil)

def generate_hexagon_grid(hex_size, border_size, input_image=None, image_width=0, image_height=0, start_x=0, start_y=0, end_x=0, end_y=0, rotation=0, background_color="#ede9ac44", border_color="#12165380", fill_hex=True, excluded_color_list=excluded_color_list, filter_color=False, x_spacing=0, y_spacing=0):
    if input_image:
        image_width, image_height = input_image.size
    # Use half hex_size, thus do not double border size
    # Calculate the dimensions of the grid before rotation
    if rotation != 0:
        # Calculate rotated dimensions
        # modified to rotate input image and process to reduce calculation errors at edge conditions
        rotated_input_image = input_image.rotate(rotation, expand=True)
        rotated_image_width, rotated_image_height = rotated_input_image.size
        #rotated_image_height = abs(math.ceil((image_height ) * math.sin(math.radians(90 - rotation)) + (image_width ) * math.cos(math.radians(90 - rotation))))
        #rotated_image_width = abs(math.ceil((image_width ) * math.sin(math.radians(90 - rotation)) + (image_height ) * math.cos(math.radians(90 - rotation))))
        # Adjust hexagon size, spacing adjustments and border for rotation
        hex_size = abs(math.ceil((hex_size // 2) * math.sin(math.radians(90 - abs(rotation))) + (hex_size // 2) * math.cos(math.radians(90 - abs(rotation)))))
        hex_border_size = math.ceil(border_size * math.sin(math.radians(90 - abs(rotation))) + border_size * math.cos(math.radians(90 - abs(rotation))))
        x_spacing = math.ceil(x_spacing * math.sin(math.radians(90 - abs(rotation))) + x_spacing * math.cos(math.radians(90 - abs(rotation))))
        y_spacing = math.ceil(y_spacing * math.sin(math.radians(90 - abs(rotation))) + y_spacing * math.cos(math.radians(90 - abs(rotation))))
        # Calculate additional width and height due to rotation
        additional_width = rotated_image_width - image_width
        additional_height = rotated_image_height - image_height
        #rotated_input_image.show()
    else:
        rotated_input_image = input_image
        rotated_image_width = image_width 
        rotated_image_height = image_height
        hex_size = hex_size // 2
        hex_border_size = border_size
        additional_width = 0
        additional_height = 0
    # Create a new image with white background (adjusted for rotation)
    image = Image.new("RGBA", (rotated_image_width, rotated_image_height), background_color)
    draw = ImageDraw.Draw(image, mode="RGBA")
    hex_width = hex_size * 2
    hex_height = hex_size * 2
    hex_horizontal_spacing = (hex_width ) + (hex_border_size if hex_border_size < 0 else 0) + x_spacing #* 0.8660254
    hex_vertical_spacing = hex_height + (hex_border_size if hex_border_size < 0 else 0) + y_spacing
    col = 0
    row = 0
    def draw_hexagon(x, y, color="#FFFFFFFF", rotation=0, outline_color="#12165380", outline_width=0, sides=6):
        side_length = (hex_size * 2) / math.sqrt(3)
        points = [(x + side_length * math.cos(math.radians(angle + rotation)), y + side_length * math.sin(math.radians(angle + rotation))) for angle in range(0, 360, (360 // sides))]
        draw.polygon(points, fill=color, outline=outline_color, width=max(-5, outline_width))
    # Function to range a floating number
    def frange(start, stop, step):
        i = start
        while i < stop:
            yield i
            i += step
    # Draw hexagons 
    for y in frange(start_y, max(image_height + additional_height, image_height, rotated_image_height) + (end_y - start_y), hex_vertical_spacing):
        row += 1
        col = 0 
        for x in frange(start_x, max(image_width + additional_width, image_width, rotated_image_width) + (end_x - start_x), hex_horizontal_spacing):
            col += 1
            x_offset = hex_width // 2
            y_offset = (hex_height // 2) #* 1.15470054342517
            # Adjust y_offset for columns 1 and 3 to overlap
            if col % 2 == 1:
                y_offset -= (hex_height // 2) #* 0.8660254
            if rotated_input_image:
                # Sample the colors of the pixels in the hexagon, if fill_hex is True
                if fill_hex:
                    sample_size = max(2, math.ceil(math.sqrt(hex_size)))
                    sample_x = int(x + x_offset)
                    sample_y = int(y + y_offset)
                    sample_colors = []
                    for i in range(-sample_size // 2, sample_size // 2 + 1):
                        for j in range(-sample_size // 2, sample_size // 2 + 1):
                            print(f"    Progress : {str(min(rotated_image_width - 1,max(1,sample_x + i)))}  {str(min(rotated_image_height - 1,max(1,sample_y + j)))}", end="\r")
                            sample_colors.append(rotated_input_image.getpixel((min(rotated_image_width - 1,max(1,sample_x + i)), min(rotated_image_height - 1,max(1,sample_y + j)))))
                    if filter_color:
                        # Filter out the excluded colors
                        filtered_colors = [color for color in sample_colors if color not in excluded_color_list]
                        # Ensure there are colors left after filtering
                        if filtered_colors:
                            # Calculate the average color of the filtered colors
                            avg_color = tuple(int(sum(channel) / len(filtered_colors)) for channel in zip(*filtered_colors))
                        else:
                            avg_color = excluded_color_list[0] if excluded_color_list else (0,0,0,0)
                    else:
                        avg_color = tuple(int(sum(channel) / len(sample_colors)) for channel in zip(*sample_colors))
                    if avg_color in excluded_color_list:
                        print(f"color excluded: {avg_color}")
                        avg_color = (0,0,0,0)
                    else:
                        print(f"color found: {avg_color}")
                        #draw_hexagon(x + x_offset, y + y_offset, color="#{:02x}{:02x}{:02x}{:02x}".format(*avg_color if fill_hex else (0,0,0,0)), outline_color=border_color, outline_width=hex_border_size)
                        draw_hexagon(x + x_offset, y + y_offset, color="#{:02x}{:02x}{:02x}{:02x}".format(*avg_color), outline_color=border_color, outline_width=hex_border_size)
                else:
                    draw_hexagon(x + x_offset, y + y_offset, color="#000000", outline_color=border_color, outline_width=hex_border_size)
            else:
                color = "#%02x%02x%02x%02x" % (128, math.ceil(y) % 255, math.ceil(x) % 255, 255) if fill_hex else (0,0,0,0)
                draw_hexagon(x + x_offset, y + y_offset, color=color, outline_color=border_color, outline_width=hex_border_size)
    if rotation != 0:
        #image.show()
        # Rotate the final image
        rotated_image = image.rotate(-rotation, expand=True)
        #rotated_image.show()
        bbox = rotated_image.split()[3].getbbox(False)
        if bbox:
            final_image = rotated_image.crop(bbox).resize((image_width,image_height))
        else:
            final_image = rotated_image.resize((image_width,image_height))
    else:
        final_image = image
    return final_image

def generate_hexagon_grid_with_text(hex_size, border_size, input_image=None, image_width=0, image_height=0, start_x=0, start_y=0, end_x=0, end_y=0, rotation=0, background_color="#ede9ac44", border_color="#12165380", fill_hex=True, excluded_color_list=excluded_color_list, filter_color=False, x_spacing=0, y_spacing=0, 
        add_hex_text_option=None, custom_text_list=None, custom_text_color_list=None):

    if input_image:
        image_width, image_height = input_image.size
    # Use half hex_size, thus do not double border size
    # Calculate the dimensions of the grid before rotation
    if rotation != 0:
        # Calculate rotated dimensions
        # modified to rotate input image and process to reduce calculation errors at edge conditions
        rotated_input_image = input_image.rotate(rotation, expand=True)
        rotated_image_width, rotated_image_height = rotated_input_image.size
        #rotated_image_height = abs(math.ceil((image_height ) * math.sin(math.radians(90 - rotation)) + (image_width ) * math.cos(math.radians(90 - rotation))))
        #rotated_image_width = abs(math.ceil((image_width ) * math.sin(math.radians(90 - rotation)) + (image_height ) * math.cos(math.radians(90 - rotation))))
        # Adjust hexagon size, spacing adjustments and border for rotation
        hex_size = abs(math.ceil((hex_size // 2) * math.sin(math.radians(90 - abs(rotation))) + (hex_size // 2) * math.cos(math.radians(90 - abs(rotation)))))
        hex_border_size = math.ceil(border_size * math.sin(math.radians(90 - abs(rotation))) + border_size * math.cos(math.radians(90 - abs(rotation))))
        x_spacing = math.ceil(x_spacing * math.sin(math.radians(90 - abs(rotation))) + x_spacing * math.cos(math.radians(90 - abs(rotation))))
        y_spacing = math.ceil(y_spacing * math.sin(math.radians(90 - abs(rotation))) + y_spacing * math.cos(math.radians(90 - abs(rotation))))
        # Calculate additional width and height due to rotation
        additional_width = rotated_image_width - image_width
        additional_height = rotated_image_height - image_height
        #rotated_input_image.show()
    else:
        rotated_input_image = input_image
        rotated_image_width = image_width 
        rotated_image_height = image_height
        hex_size = hex_size // 2
        hex_border_size = border_size
        additional_width = 0
        additional_height = 0
    # Create a new image with white background (adjusted for rotation)
    image = Image.new("RGBA", (rotated_image_width, rotated_image_height), background_color)
    font_image = Image.new("RGBA", (rotated_image_width, rotated_image_height), (0,0,0,0))
    draw = ImageDraw.Draw(image, mode="RGBA")
    hex_width = hex_size * 2
    hex_height = hex_size * 2
    hex_horizontal_spacing = (hex_width ) + (hex_border_size if hex_border_size < 0 else 0) + x_spacing #* 0.8660254
    hex_vertical_spacing = hex_height + (hex_border_size if hex_border_size < 0 else 0) + y_spacing
    col = 0
    row = 0
    ## Function to draw optional text
    if add_hex_text_option != "None":
        # Load the emoji font
        font_name = "Segoe UI Emoji"
        if os.name == 'nt':  # Windows
            font_path = "./fonts/seguiemj.ttf"
        else:  # Other OS (Linux, macOS, etc.)
            font_path = "./fonts/seguiemj.ttf"
        if not os.path.exists(font_path):
            raise FileNotFoundError("Emoji font not found in './fonts' directory.")
        # Prepare the text and color lists
        text_list = []
        color_list = []
        if add_hex_text_option == "Playing Cards Sequential":
            text_list = constants.cards
            color_list = constants.card_colors
        elif add_hex_text_option == "Playing Cards Alternate Red and Black":
            text_list = constants.cards_alternating
            color_list = constants.card_colors_alternating
        elif add_hex_text_option == "Custom List":
            if custom_text_list:
                #text_list = [text.strip() for text in custom_text_list.split(",")]
                text_list = ast.literal_eval(custom_text_list) if custom_text_list else None
            if custom_text_color_list:
                #color_list = [color.strip() for color in custom_text_color_list.split(",")]
                color_list = ast.literal_eval(custom_text_color_list) if custom_text_color_list else None
        else:
            # Coordinates will be generated dynamically
            pass
    hex_index = -1  # Initialize hex index
    def draw_hexagon(x, y, color="#FFFFFFFF", rotation=0, outline_color="#12165380", outline_width=0, sides=6):
        side_length = (hex_size * 2) / math.sqrt(3)
        points = [(x + side_length * math.cos(math.radians(angle + rotation)), y + side_length * math.sin(math.radians(angle + rotation))) for angle in range(0, 360, (360 // sides))]
        draw.polygon(points, fill=color, outline=outline_color, width=max(-5, outline_width))
    # Function to range a floating number
    def frange(start, stop, step):
        i = start
        while i < stop:
            yield i
            i += step
    # Draw hexagons 
    for y in frange(start_y, max(image_height + additional_height, image_height, rotated_image_height) + (end_y - start_y), hex_vertical_spacing):
        row += 1
        col = 0 
        for x in frange(start_x, max(image_width + additional_width, image_width, rotated_image_width) + (end_x - start_x), hex_horizontal_spacing):
            col += 1
            hex_index += 1  # Increment hex index
            x_offset = hex_width // 2
            y_offset = (hex_height // 2) #* 1.15470054342517
            # Adjust y_offset for columns 1 and 3 to overlap
            if col % 2 == 1:
                y_offset -= (hex_height // 2) #* 0.8660254
            if rotated_input_image:
                # Sample the colors of the pixels in the hexagon, if fill_hex is True
                if fill_hex:
                    sample_size = max(2, math.ceil(math.sqrt(hex_size)))
                    sample_x = int(x + x_offset)
                    sample_y = int(y + y_offset)
                    sample_colors = []
                    for i in range(-sample_size // 2, sample_size // 2 + 1):
                        for j in range(-sample_size // 2, sample_size // 2 + 1):
                            print(f"    Progress : {str(min(rotated_image_width - 1,max(1,sample_x + i)))}  {str(min(rotated_image_height - 1,max(1,sample_y + j)))}", end="\r")
                            sample_colors.append(rotated_input_image.getpixel((min(rotated_image_width - 1,max(1,sample_x + i)), min(rotated_image_height - 1,max(1,sample_y + j)))))
                    if filter_color:
                        # Filter out the excluded colors
                        filtered_colors = [color for color in sample_colors if color not in excluded_color_list]
                        # Ensure there are colors left after filtering
                        if filtered_colors:
                            # Calculate the average color of the filtered colors
                            avg_color = tuple(int(sum(channel) / len(filtered_colors)) for channel in zip(*filtered_colors))
                        else:
                            avg_color = excluded_color_list[0] if excluded_color_list else (0,0,0,0)
                    else:
                        avg_color = tuple(int(sum(channel) / len(sample_colors)) for channel in zip(*sample_colors))
                    if avg_color in excluded_color_list:
                        print(f"color excluded: {avg_color}")
                        avg_color = (0,0,0,0)
                    else:
                        print(f"color found: {avg_color}")
                        #draw_hexagon(x + x_offset, y + y_offset, color="#{:02x}{:02x}{:02x}{:02x}".format(*avg_color if fill_hex else (0,0,0,0)), outline_color=border_color, outline_width=hex_border_size)
                        draw_hexagon(x + x_offset, y + y_offset, color="#{:02x}{:02x}{:02x}{:02x}".format(*avg_color), outline_color=border_color, outline_width=hex_border_size)
                else:
                    draw_hexagon(x + x_offset, y + y_offset, color="#00000000", outline_color=border_color, outline_width=hex_border_size)
            else:
                color = "#%02x%02x%02x%02x" % (128, math.ceil(y) % 255, math.ceil(x) % 255, 255) if fill_hex else (0,0,0,0)
                draw_hexagon(x + x_offset, y + y_offset, color=color, outline_color=border_color, outline_width=hex_border_size)
            # Draw text in hexagon
            if add_hex_text_option != None:
                font_size = calculate_font_size(hex_size, 0.333, 20, 7)
                # Skip drawing text if font size is too small
                if font_size:
                    font = ImageFont.truetype(font_path, font_size)
                    # Determine the text to draw
                    if add_hex_text_option == "Row-Column Coordinates":
                        text = f"{col},{row}"
                    elif add_hex_text_option == "Sequential Numbers":
                        text = f"{hex_index}"
                    elif add_hex_text_option == "Column Letter, Row Number":
                        text = f"{number_to_letter(col)},{row}"
                    elif add_hex_text_option == "Column Number, Row Letter":
                        text = f"{col},{number_to_letter(row)}"
                    elif text_list:
                        text = text_list[hex_index % len(text_list)]
                    else:
                        text = None
                    # Determine the text color
                    if color_list:
                        # Extract the opacity from the border color and add to the color_list
                        if isinstance(border_color, str):
                            opacity = int(border_color[-2:], 16)
                        elif isinstance(border_color, tuple) and len(border_color) == 4:
                            opacity = border_color[3]
                        else:
                            opacity = 255  # Default to full opacity if format is unexpected
                        text_color = update_color_opacity(hex_to_rgb(color_list[hex_index % len(color_list)]), opacity)
                    else:
                        # Use border color and opacity
                        text_color = border_color 
                        #text_color = "#{:02x}{:02x}{:02x}{:02x}".format(*text_color)
                    # Skip if text is empty
                    if text != None:
                        print(f"Drawing Text: {text} color: {text_color} size: {font_size}")
                        # Calculate text size using Pango
                        # Create a temporary surface to calculate text size
                        # temp_surface = cairo.ImageSurface(cairo.FORMAT_ARGB32, 1, 1)
                        # temp_context = cairo.Context(temp_surface)
                        # temp_layout = pangocairocffi.create_layout(temp_context)
                        # temp_layout._set_text(text)
                        # temp_desc = pangocffi.FontDescription()
                        # temp_desc._set_family(font_name)
                        # temp_desc._set_size(pangocffi.units_from_double(font_size))
                        # temp_layout._set_font_description(temp_desc)
                        # pangocairocffi.show_layout(temp_context, temp_layout)
                        # ink_rect, logical_rect = temp_layout.get_extents()
                        # text_width = logical_rect.width
                        # text_height = logical_rect.height                
                        # Calculate position to center text in hexagon
                        # text_x = x + x_offset - (text_width / 2)
                        # text_y = y + y_offset - (text_height / 2)
                        # Calculate position to center text in hexagon
                        text_x = x + x_offset - (hex_size / 1.75)
                        text_y = y + y_offset - (hex_size / 1.25)
                        # Draw the text directly onto the image
                        font_image = draw_text_with_emojis(
                            image=font_image,
                            text=text,
                            font_color=update_color_opacity(text_color,255),
                            offset_x=text_x,
                            offset_y=text_y,
                            font_name=font_name,
                            font_size=font_size
                        )                        
                        # # Use Pilmoji to draw text with emojis
                        # with Pilmoji(image) as pilmoji:
                        #     # Calculate text size
                        #     w, h = pilmoji.getsize(text, font=font)
                        #     # Calculate position to center text in hexagon
                        #     text_x = x + x_offset - w / 2
                        #     text_y = y + y_offset - h / 2
                        #     # Draw text
                        #     pilmoji.text(
                        #         (text_x, text_y),
                        #         text,
                        #         font=font,
                        #         fill=text_color
                        #     )
    image.paste(font_image, (0, 0), font_image)
    if rotation != 0:
        # Rotate the final image
        rotated_image = image.rotate(-rotation, expand=True, fillcolor=background_color)
        bbox = rotated_image.split()[3].getbbox(alpha_only=False)

        if bbox:
            # Calculate the size of the rotated image
            rotated_width, rotated_height = rotated_image.size

            # Calculate the size of the cropped area
            box_width = bbox[2] - bbox[0]
            box_height = bbox[3] - bbox[1]

            box_width_adjust = (box_width - image_width) / 2
            bbox_height_adjust = (box_height - image_height) / 2

            print(f"\nbbox: {bbox}: size: {(image_width, image_height)} estimated size: {(box_width, box_height)}")

            # Calculate adjusted box coordinates
            left = bbox[0] + box_width_adjust
            upper = bbox[1] + bbox_height_adjust
            right = bbox[2] - box_width_adjust
            lower = bbox[3] - bbox_height_adjust

            # Ensure coordinates are within image bounds
            left = max(0, min(left, rotated_width))
            upper = max(0, min(upper, rotated_height))
            right = max(0, min(right, rotated_width))
            lower = max(0, min(lower, rotated_height))

            # Ensure the box has positive width and height
            if right > left and lower > upper:
                # Crop the image using the adjusted box
                cropped_image = rotated_image.crop((left, upper, right, lower))
                # Resize the cropped image to the desired size
                final_image = cropped_image.resize((image_width, image_height))
            else:
                # If the box is invalid, resize the entire rotated image
                final_image = rotated_image.resize((image_width, image_height))
        else:
            final_image = rotated_image.resize((image_width, image_height))
    else:
        final_image = image
    return final_image

def generate_hexagon_grid_interface(hex_size, border_size, image, start_x, start_y, end_x, end_y, rotation, background_color, border_color, fill_hex, excluded_color_list, filter_color, x_spacing, y_spacing, add_hex_text_option=None, custom_text_list=None, custom_text_color_list=None):
    print(f"Generating Hexagon Grid with Parameters: Hex Size: {hex_size}, Border Size: {border_size}, Start X: {start_x}, Start Y: {start_y}, End X: {end_x}, End Y: {end_y}, Rotation: {rotation}, Background Color: {background_color}, Border Color: {border_color}, Fill Hex: {fill_hex}, Excluded Color List: {excluded_color_list}, Filter Color: {filter_color}, X Spacing: {x_spacing}, Y Spacing: {y_spacing}, add Text Option {add_hex_text_option}\n")
    hexagon_grid_image = generate_hexagon_grid_with_text(
        hex_size=abs(hex_size),
        border_size=border_size,
        input_image=image,
        start_x=start_x,
        start_y=start_y,
        end_x=end_x,
        end_y=end_y,
        rotation=rotation,
        background_color=background_color,
        border_color=border_color,
        fill_hex = fill_hex,
        excluded_color_list = excluded_color_list,
        filter_color = filter_color, 
        x_spacing = x_spacing if abs(hex_size) > abs(x_spacing) else (hex_size if x_spacing >= 0 else -hex_size), 
        y_spacing = y_spacing if abs(hex_size) > abs(y_spacing) else (hex_size if y_spacing >= 0 else -hex_size),
        add_hex_text_option = add_hex_text_option,
        custom_text_list = custom_text_list,
        custom_text_color_list= custom_text_color_list
    )
    overlay_image = multiply_and_blend_images(image, hexagon_grid_image, 50)
    return hexagon_grid_image, overlay_image