import argparse, csv, collections


def decide(flags, fourcc):
    fs = set(flags.split(";")) if flags else set()
    if "font_atlas" in fs or "non_texture" in fs:
        return "skip", "font atlas uses fixed pixel rects in Fonts.dat / not a texture"
    if "text_baked" in fs:
        return "review", "text baked in image (must be redrawn, AI will garble text)"
    if "ui_atlas" in fs:
        return "review", "UI atlas, may have fixed pixel coordinates"
    if "tiling_likely" in fs:
        return "upscale_tiling", "tileable: use seamless/tiling-aware upscale"
    return "upscale", ""


def main():
    ap = argparse.ArgumentParser(description="Build an upscale plan csv from the preprocessing report.")
    ap.add_argument("--report", required=True)
    ap.add_argument("--out", required=True)
    ap.add_argument("--scale", type=int, default=2)
    args = ap.parse_args()

    rows = list(csv.DictReader(open(args.report, newline="", encoding="utf-8")))
    out = []
    counts = collections.Counter()
    for r in rows:
        action, reason = decide(r.get("flags", ""), r.get("dds_fourcc", ""))
        counts[action] += 1
        try:
            w = int(r["orig_w"]); h = int(r["orig_h"])
            tw, th = w * args.scale, h * args.scale
        except Exception:
            tw = th = ""
        out.append({
            "name": r["name"],
            "png": r["png"],
            "orig_w": r["orig_w"], "orig_h": r["orig_h"],
            "target_w": tw, "target_h": th,
            "has_alpha": r.get("has_alpha", ""),
            "dds_fourcc": r.get("dds_fourcc", ""),
            "dds_mips": r.get("dds_mips", ""),
            "group": r.get("group", ""),
            "action": action,
            "reason": reason,
        })
    with open(args.out, "w", newline="", encoding="utf-8") as f:
        wtr = csv.DictWriter(f, fieldnames=list(out[0].keys()))
        wtr.writeheader()
        wtr.writerows(out)
    print("plan written:", args.out)
    for k, v in counts.most_common():
        print("  %-16s %d" % (k, v))


if __name__ == "__main__":
    main()