# Melpomene webcomic reader JSON/JS/HTML generator
# Version 1.0.0 - UNSTABLE
# CC-BY-NC-SA https://git.aribaud.net/caribaud/melpomene/

import sys
import re
import xml.etree.ElementTree as ET

from pathlib import Path


def extract_zooms(src_folder, dest_file):
    folder = Path(src_folder)

    zooms = {}

    for svg_path in folder.glob("*.svg"):
        print(svg_path.name)
        match = re.search("P(\d+)", svg_path.name)
        if match:
        
            page_idx = int(match.group(1))
        
            zooms[page_idx] = []
        
            tree = ET.parse(svg_path)
            root = tree.getroot()
            
            for area in root.findall('.//{*}rect'):
                zooms[page_idx].append([
                    float(area.get("width")),
                    float(area.get("height")),
                    float(area.get("x")),
                    float(area.get("y")),
                ])

    with open(dest_file, "w") as data_file:
        data_file.write("zooms = [\n")
        for page_idx in sorted(zooms.keys()):
            for zoom in zooms[page_idx]:
            
                if zoom[2] < 0 or zoom[3] < 0 :
                    print(f"WARNING: negative pos x / pos y in page {page_idx} for zoom {zoom} (is the rectangle flipped?)")
            
                data_file.write(f"    {[page_idx] + zoom},\n")
        data_file.write("]\n")

if __name__ == "__main__":
    extract_zooms(sys.argv[1], sys.argv[2])