{"spec_id":"maze-printable","library":"pygal","language":"python","code":"\"\"\" anyplot.ai\nmaze-printable: Printable Maze Puzzle\nLibrary: pygal 3.1.0 | Python 3.13.13\nQuality: 87/100 | Updated: 2026-05-16\n\"\"\"\n\nimport os\nimport re\nimport sys\nfrom importlib import import_module\n\n\n# Prevent module name conflict with pygal.py script\nsys.path = [p for p in sys.path if \"implementations\" not in p]\n\nimport cairosvg\nimport numpy as np\n\n\npygal_module = import_module(\"pygal\")\nStyle = import_module(\"pygal.style\").Style\n\nTHEME = os.getenv(\"ANYPLOT_THEME\", \"light\")\n\n# Theme-adaptive colors for maze walls and background\nif THEME == \"light\":\n PAGE_BG = \"#FAF8F1\"\n WALL_COLOR = \"#000000\" # Black walls on light background (printable)\nelse:\n PAGE_BG = \"#1A1A17\"\n WALL_COLOR = \"#FFFFFF\" # White walls on dark background\n\n# Seed for reproducibility\nnp.random.seed(42)\n\n# Maze dimensions (25x25 as specified in spec)\nmaze_width = 25\nmaze_height = 25\n\n# Generate maze using DFS algorithm\n# Each cell: 0 = wall, 1 = passage\ngrid_h = maze_height * 2 + 1\ngrid_w = maze_width * 2 + 1\nmaze = np.zeros((grid_h, grid_w), dtype=int)\n\n# Initialize cells (passages between walls)\nfor y in range(maze_height):\n for x in range(maze_width):\n maze[y * 2 + 1, x * 2 + 1] = 1\n\n# DFS maze generation\nstack = [(0, 0)]\nvisited = set()\nvisited.add((0, 0))\n\ndirections = [(0, 1), (1, 0), (0, -1), (-1, 0)]\n\nwhile stack:\n cx, cy = stack[-1]\n neighbors = []\n for dx, dy in directions:\n nx, ny = cx + dx, cy + dy\n if 0 <= nx < maze_width and 0 <= ny < maze_height and (nx, ny) not in visited:\n neighbors.append((nx, ny, dx, dy))\n\n if neighbors:\n idx = np.random.randint(len(neighbors))\n nx, ny, dx, dy = neighbors[idx]\n # Remove wall between current and neighbor\n maze[cy * 2 + 1 + dy, cx * 2 + 1 + dx] = 1\n visited.add((nx, ny))\n stack.append((nx, ny))\n else:\n stack.pop()\n\n# Create entrance (top-left) and exit (bottom-right)\nmaze[0, 1] = 1 # Entrance at top\nmaze[grid_h - 1, grid_w - 2] = 1 # Exit at bottom\n\n# Mark start and goal positions in the maze data\n# Start: first cell after entrance (row 1, col 1)\nstart_y, start_x = 1, 1\n# Goal: last cell before exit (row grid_h-2, col grid_w-2)\ngoal_y, goal_x = grid_h - 2, grid_w - 2\n\n# All walls are the same color - create enough entries for each row\ncolors = tuple([WALL_COLOR] * grid_h)\n\n# Custom style - clean for printability\ncustom_style = Style(\n background=PAGE_BG,\n plot_background=PAGE_BG,\n foreground=WALL_COLOR,\n foreground_strong=WALL_COLOR,\n foreground_subtle=WALL_COLOR,\n colors=colors,\n title_font_size=96,\n label_font_size=1,\n major_label_font_size=1,\n legend_font_size=1,\n value_font_size=1,\n font_family=\"monospace\",\n)\n\n# Use Dot chart to create grid representation\nchart = pygal_module.Dot(\n width=3600,\n height=3600,\n style=custom_style,\n title=\"maze-printable · pygal · anyplot.ai\",\n show_legend=False,\n show_x_labels=False,\n show_y_labels=False,\n dots_size=32,\n margin=100,\n)\n\n# Add wall rows - walls show as dots, passages are empty\nfor y in range(grid_h):\n row_data = []\n for x in range(grid_w):\n if maze[y, x] == 0: # Wall\n row_data.append(1)\n else: # Passage\n row_data.append(None)\n chart.add(\"\", row_data)\n\n# First, create a helper chart with dots at start and goal positions to find exact coordinates\nhelper_chart = pygal_module.Dot(\n width=3600,\n height=3600,\n style=custom_style,\n title=\"maze-printable · pygal · anyplot.ai\",\n show_legend=False,\n show_x_labels=False,\n show_y_labels=False,\n dots_size=32,\n margin=100,\n)\n\n# Add rows with dots only at start and goal positions\nfor y in range(grid_h):\n row_data = []\n for x in range(grid_w):\n if (x == start_x and y == start_y) or (x == goal_x and y == goal_y):\n row_data.append(1)\n else:\n row_data.append(None)\n helper_chart.add(\"\", row_data)\n\n# Extract circle positions from helper chart\nhelper_svg = helper_chart.render().decode(\"utf-8\")\ncircles = re.findall(r']*cx=\"([^\"]+)\"[^>]*cy=\"([^\"]+)\"', helper_svg)\n\n# Get start and goal positions (first circle is start, second is goal)\n# Note: pygal applies a transform to the plot group, so we need to add offsets\n# The plot group has transform=\"translate(margin, title_area_height + margin)\"\n# margin = 100, title_area_height ~ 106 (based on title_font_size 96)\nplot_x_offset = 100\nplot_y_offset = 206 # Accounts for title area and margin\n\nif len(circles) >= 2:\n s_x = float(circles[0][0]) + plot_x_offset\n s_y = float(circles[0][1]) + plot_y_offset\n g_x = float(circles[1][0]) + plot_x_offset\n g_y = float(circles[1][1]) + plot_y_offset\nelse:\n # Fallback positions\n s_x, s_y = 300, 400\n g_x, g_y = 3350, 3350\n\n# Render the main maze chart\nsvg_string = chart.render().decode(\"utf-8\")\n\n# Create S and G text elements with bold styling - sized to fit within a cell\n# Cell spacing is approximately 64px, so font-size of 50 fits well\ns_marker = f'''S'''\ng_marker = f'''G'''\n\n# Insert markers before the closing tag\nsvg_with_markers = svg_string.replace(\"\", f\"{s_marker}\\n{g_marker}\\n\")\n\n# Use cairosvg to convert SVG to PNG\ncairosvg.svg2png(bytestring=svg_with_markers.encode(\"utf-8\"), write_to=f\"plot-{THEME}.png\")\n\n# Also save HTML version with markers\nhtml_template = f\"\"\"\n\n\n\n\nmaze-printable · pygal · anyplot.ai\n\n\n{svg_with_markers}\n\n\"\"\"\n\nwith open(f\"plot-{THEME}.html\", \"w\", encoding=\"utf-8\") as f:\n f.write(html_template)\n"}