#!/usr/bin/env python3
"""Generate Illuscape document templates."""
from pathlib import Path

TEMPLATES_DIR = Path("config/templates")

def mm_to_px(mm: float) -> float:
    return mm * 3.7795275591  # 96 dpi

def in_to_px(inches: float) -> float:
    return inches * 96.0

def svg(name: str, width_px: float, height_px: float,
        units: str, bleed_mm: float = 0.0, note: str = "") -> str:
    import math
    bleed_px = mm_to_px(bleed_mm)
    guides = ""
    if bleed_mm > 0:
        guides = f"""
    <sodipodi:guide position="{-bleed_px:.4f},{bleed_px:.4f}" orientation="1,0" />
    <sodipodi:guide position="{width_px + bleed_px:.4f},{bleed_px:.4f}" orientation="1,0" />
    <sodipodi:guide position="{bleed_px:.4f},{-bleed_px:.4f}" orientation="0,1" />
    <sodipodi:guide position="{bleed_px:.4f},{height_px + bleed_px:.4f}" orientation="0,1" />"""
    comment = f"<!-- {note} -->" if note else ""
    return f"""<?xml version="1.0" encoding="UTF-8"?>
{comment}
<svg
   xmlns="http://www.w3.org/2000/svg"
   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.0.dtd"
   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
   width="{width_px:.4f}"
   height="{height_px:.4f}"
   viewBox="0 0 {width_px:.4f} {height_px:.4f}"
   version="1.1"
   id="svg-{name.lower().replace(' ', '-')}">
  <sodipodi:namedview
     id="namedview1"
     pagecolor="#ffffff"
     bordercolor="#666666"
     borderopacity="1.0"
     inkscape:showpageshadow="2"
     inkscape:pageopacity="1.0"
     inkscape:pagecheckerboard="0"
     inkscape:document-units="{units}"
     showgrid="false"
     inkscape:snap-global="true"
     inkscape:snap-nodes="true"
     inkscape:snap-bbox="true"
     inkscape:snap-to-guides="true"
     inkscape:guide-bbox="true"
     units="{units}">{guides}
  </sodipodi:namedview>
  <title>{name}</title>
  <g inkscape:label="Background" inkscape:groupmode="layer" id="layer-background" style="display:inline" />
  <g inkscape:label="Guides"     inkscape:groupmode="layer" id="layer-guides"     style="display:inline" />
  <g inkscape:label="Artwork"    inkscape:groupmode="layer" id="layer-artwork"    style="display:inline" />
</svg>
"""

specs = [
    ("Letter",            in_to_px(8.5),  in_to_px(11),   "in",  0,  "US Letter portrait"),
    ("A4",                mm_to_px(210),  mm_to_px(297),  "mm",  0,  "A4 portrait"),
    ("Web-1920x1080",     1920,           1080,           "px",  0,  "HD web canvas"),
    ("Web-1280x720",      1280,           720,            "px",  0,  "HD web canvas (smaller)"),
    ("Print-CMYK-Letter", in_to_px(8.5),  in_to_px(11),   "in",  3,  "US Letter with 3mm bleed. Note: Inkscape is RGB-native; set CMYK values manually."),
    ("Print-CMYK-A4",     mm_to_px(210),  mm_to_px(297),  "mm",  3,  "A4 with 3mm bleed. Note: Inkscape is RGB-native; set CMYK values manually."),
]

for name, w, h, units, bleed, note in specs:
    path = TEMPLATES_DIR / f"{name}.svg"
    path.write_text(svg(name, w, h, units, bleed, note))
    print(f"✓ {path}")