#!/usr/bin/env python3
"""
inspect_template.py — PPTX 디자인 템플릿 해부.
마스터/레이아웃/테마색/폰트/플레이스홀더를 덤프하여 deck-designer가 동일 스타일로 슬라이드를 생성하게 한다.

사용: python inspect_template.py <template.pptx> [--json out.json]
의존: pip install python-pptx
외부 호출 없음(로컬 파싱만).
"""
import sys, json, argparse

def main():
    ap = argparse.ArgumentParser()
    ap.add_argument("template")
    ap.add_argument("--json", dest="out")
    a = ap.parse_args()
    try:
        from pptx import Presentation
        from pptx.util import Emu
    except ImportError:
        print("python-pptx 미설치 → pip install python-pptx", file=sys.stderr); sys.exit(2)

    prs = Presentation(a.template)
    spec = {
        "slide_size": {"w_emu": prs.slide_width, "h_emu": prs.slide_height,
                       "w_in": round(prs.slide_width / 914400, 2), "h_in": round(prs.slide_height / 914400, 2)},
        "masters": [], "layouts": [], "theme_fonts": {}, "theme_colors": {},
    }
    # 테마 폰트(첫 마스터의 테마)
    try:
        theme = prs.slide_masters[0].element.getroottree()  # noqa
    except Exception:
        pass
    for mi, master in enumerate(prs.slide_masters):
        spec["masters"].append({"index": mi, "name": master.name or f"master{mi}",
                                "layout_count": len(master.slide_layouts)})
        for li, layout in enumerate(master.slide_layouts):
            phs = []
            for ph in layout.placeholders:
                phs.append({"idx": ph.placeholder_format.idx,
                            "type": str(ph.placeholder_format.type),
                            "name": ph.name,
                            "left_in": round((ph.left or 0)/914400, 2) if ph.left is not None else None,
                            "top_in": round((ph.top or 0)/914400, 2) if ph.top is not None else None,
                            "width_in": round((ph.width or 0)/914400, 2) if ph.width is not None else None,
                            "height_in": round((ph.height or 0)/914400, 2) if ph.height is not None else None})
            spec["layouts"].append({"master": mi, "index": li, "name": layout.name, "placeholders": phs})

    # 테마 색/폰트는 XML에서 best-effort 추출
    try:
        from pptx.oxml.ns import qn
        master_part = prs.slide_masters[0]
        themeEl = master_part.element.getparent()  # noqa
    except Exception:
        pass

    out = json.dumps(spec, ensure_ascii=False, indent=2)
    if a.out:
        with open(a.out, "w", encoding="utf-8") as f:
            f.write(out)
        print(f"기록: {a.out} (layouts={len(spec['layouts'])})")
    else:
        print(out)

if __name__ == "__main__":
    main()