import re
import sys
from zttf.ttfile import TTFile


if __name__ == '__main__':
    if len(sys.argv) < 2:
        print("Usage: {} <font filename>".format(sys.argv[0]))
        sys.exit(0)

    t = TTFile(sys.argv[1])
    if not t.is_valid:
        print("Invalid")
        sys.exit(0)
        
    f = t.faces[0]    
    glyphs = {}    
    for c in range(0,65536):
        try:
            g = f.char_to_glyph(c)
            if g:
                glyphs[c] = g
        except:
            pass
    chars = sorted(glyphs.keys())

    fontID = re.sub(r"[^0-9A-Za-z]", "_", f.name)
    if fontID[0].isdigit():
        fontID = "_" + fontID
    print("""FONT_%s = [
 ["%s", // family
 %d], // style
 %d, // ascender
 %d, // descender
 %f, // units_per_em
 [
""" % (fontID, f.font_family,  f.tables[b'head'].mac_style, f.ascender, f.descender, 
       f.units_per_em))
    for c in chars:
        glyph = f.char_to_glyph(c)
        line = "  [ chr(%d), %d, [" % ( c, f.glyph_metrics[glyph][0] )
        for c2 in chars:
            r = f.char_to_glyph(c2)
            if (glyph,r) in f.glyph_kern:
                line += "[chr(%d),%d]," % (c2, f.glyph_kern[(glyph,r)])
        line += "] ],"
        print(line)
    print(" ]\n];\n")