#!/usr/bin/env python3
# /// script
# requires-python = ">=3.10"
# dependencies = [
#     "Pillow>=10.0",
#     "datasets>=2.14",
#     "PyMuPDF>=1.23",
#     "huggingface-hub>=0.19",
#     "pyobjc-framework-Cocoa>=10.0",
# ]
# ///
"""Build and push the Fraser/cursors HuggingFace dataset.

Collects cursors from:
  1. macOS system cursors (PDF + info.plist, plus NSCursor for arrow)
  2. Linux Adwaita (xcursor-extracted PNGs with hotspot metadata)
  3. Linux SVG-rendered themes (apple_cursor, bibata, google_cursor, notwaita, xcursor_pro)
  4. Google pre-built cursors (GoogleDot 200px PNGs)

Deduplicates by (cursor_type, os, variant), keeping the largest size.
"""

import io
import plistlib
import re
import sys
from collections import defaultdict
from pathlib import Path

import fitz  # PyMuPDF
from PIL import Image

CURSOR_DATASET = Path("cursor_dataset")
MACOS_CURSORS_DIR = Path(
    "/System/Library/Frameworks/ApplicationServices.framework"
    "/Versions/A/Frameworks/HIServices.framework"
    "/Versions/A/Resources/cursors"
)

# ── Cursor-type mappings ─────────────────────────────────────────────────────

LINUX_NAME_TO_TYPE = {
    "default": "arrow", "left_ptr": "arrow", "arrow": "arrow",
    "top_left_arrow": "arrow",
    "pointer": "pointer", "hand2": "pointer", "pointing_hand": "pointer",
    "text": "text", "xterm": "text",
    "vertical-text": "text_vertical", "vertical_text": "text_vertical",
    "crosshair": "crosshair", "cross": "crosshair", "tcross": "crosshair",
    "cross_reverse": "crosshair", "diamond_cross": "crosshair",
    "move": "move", "fleur": "move", "dnd-move": "move",
    "grab": "grab", "hand1": "grab", "openhand": "grab",
    "grabbing": "grabbing", "closedhand": "grabbing",
    "not-allowed": "not_allowed", "crossed_circle": "not_allowed",
    "no-drop": "not_allowed", "dnd_no_drop": "not_allowed",
    "dnd-no-drop": "not_allowed",
    "help": "help", "question_arrow": "help",
    "context-menu": "context_menu", "context_menu": "context_menu",
    "cell": "cell", "plus": "cell",
    "copy": "copy", "dnd-copy": "copy", "dnd_copy": "copy",
    "alias": "alias", "dnd-link": "alias", "dnd_link": "alias", "link": "alias",
    "wait": "wait", "watch": "wait",
    "progress": "progress", "left_ptr_watch": "progress",
    "n-resize": "resize_n", "top_side": "resize_n",
    "s-resize": "resize_s", "bottom_side": "resize_s",
    "e-resize": "resize_e", "right_side": "resize_e",
    "w-resize": "resize_w", "left_side": "resize_w",
    "ne-resize": "resize_ne", "top_right_corner": "resize_ne",
    "nw-resize": "resize_nw", "top_left_corner": "resize_nw",
    "se-resize": "resize_se", "bottom_right_corner": "resize_se",
    "sw-resize": "resize_sw", "bottom_left_corner": "resize_sw",
    "ew-resize": "resize_ew", "sb_h_double_arrow": "resize_ew",
    "col-resize": "resize_ew",
    "ns-resize": "resize_ns", "sb_v_double_arrow": "resize_ns",
    "row-resize": "resize_ns",
    "nesw-resize": "resize_nesw", "fd_double_arrow": "resize_nesw",
    "nwse-resize": "resize_nwse", "bd_double_arrow": "resize_nwse",
    "zoom-in": "zoom_in", "zoom_in": "zoom_in",
    "zoom-out": "zoom_out", "zoom_out": "zoom_out",
    "all-scroll": "all_scroll", "all_scroll": "all_scroll",
}

MACOS_NAME_TO_TYPE = {
    "busybutclickable": "progress",
    "cell": "cell",
    "closedhand": "grabbing",
    "contextualmenu": "context_menu",
    "copy": "copy",
    # countinguphand/countingdownhand/countingupandownhand are finger-counting
    # animations, not the spinning wait cursor (beach ball is system-controlled)
    "cross": "crosshair",
    "help": "help",
    "ibeamvertical": "text",
    "ibeamhorizontal": "text_vertical",
    "makealias": "alias",
    "move": "move",
    "notallowed": "not_allowed",
    "openhand": "grab",
    "pointinghand": "pointer",
    "resizedown": "resize_s",
    "resizeeast": "resize_e",
    "resizeeastwest": "resize_ew",
    "resizeleft": "resize_w",
    "resizeleftright": "resize_ew",
    "resizenorth": "resize_n",
    "resizenortheast": "resize_ne",
    "resizenortheastsouthwest": "resize_nesw",
    "resizenorthsouth": "resize_ns",
    "resizenorthwest": "resize_nw",
    "resizenorthwestsoutheast": "resize_nwse",
    "resizeright": "resize_e",
    "resizesouth": "resize_s",
    "resizesoutheast": "resize_se",
    "resizesouthwest": "resize_sw",
    "resizeup": "resize_n",
    "resizeupdown": "resize_ns",
    "resizewest": "resize_w",
    "zoomin": "zoom_in",
    "zoomout": "zoom_out",
}

DEFAULT_HOTSPOTS = {
    "arrow": (0.10, 0.05), "pointer": (0.35, 0.06),
    "text": (0.50, 0.50), "text_vertical": (0.50, 0.50),
    "crosshair": (0.50, 0.50), "move": (0.50, 0.50),
    "grab": (0.50, 0.33), "grabbing": (0.50, 0.33),
    "not_allowed": (0.50, 0.50), "help": (0.10, 0.05),
    "context_menu": (0.10, 0.05), "cell": (0.50, 0.50),
    "copy": (0.10, 0.05), "alias": (0.10, 0.05),
    "wait": (0.50, 0.50), "progress": (0.10, 0.05),
    "zoom_in": (0.33, 0.33), "zoom_out": (0.33, 0.33),
    "all_scroll": (0.50, 0.50),
}

THEME_TO_OS = {
    "apple_cursor": "linux-apple-cursor",
    "bibata": "linux-bibata",
    "google_cursor": "linux-google-cursor",
    "notwaita": "linux-notwaita",
    "xcursor_pro": "linux-xcursor-pro",
}


# ── Helpers ───────────────────────────────────────────────────────────────────

def hotspot_for(cursor_type):
    if cursor_type.startswith("resize_"):
        return (0.50, 0.50)
    return DEFAULT_HOTSPOTS.get(cursor_type, (0.50, 0.50))


def pad_to_square(img, hx, hy):
    w, h = img.size
    s = max(w, h)
    if w == h:
        return img, hx, hy, s
    out = Image.new("RGBA", (s, s), (0, 0, 0, 0))
    xo, yo = (s - w) // 2, (s - h) // 2
    out.paste(img, (xo, yo))
    return out, (hx * w + xo) / s, (hy * h + yo) / s, s


def resolve_linux_type(name):
    for candidate in [name, name.replace("_", "-"), name.replace("-", "_")]:
        t = LINUX_NAME_TO_TYPE.get(candidate)
        if t is not None:
            return t
    return None


def parse_hotspot_file(path):
    data = {}
    for line in Path(path).read_text().strip().splitlines():
        if "=" in line:
            k, v = line.split("=", 1)
            data[k.strip()] = v.strip()
    return data


def split_frame_name(name):
    """'left_ptr_watch-01' → ('left_ptr_watch', 1); static names → (name, None)."""
    m = re.match(r"^(.+)-(\d+)$", name)
    return (m.group(1), int(m.group(2))) if m else (name, None)


def make_row(cursor_type, os_name, frames, delay_ms, hx, hy, size_px, variant):
    return dict(
        cursor_type=cursor_type, os=os_name, frames=frames,
        frame_delay_ms=int(delay_ms), hotspot_x=float(hx),
        hotspot_y=float(hy), size_px=int(size_px), variant=variant,
    )


# ── macOS cursors ─────────────────────────────────────────────────────────────

def render_pdf_frames(pdf_path, num_frames, target_size):
    doc = fitz.open(str(pdf_path))
    page = doc[0]
    native_w, native_h = page.rect.width, page.rect.height
    frame_h = native_h / num_frames
    scale = target_size / max(native_w, frame_h)
    pix = page.get_pixmap(matrix=fitz.Matrix(scale, scale), alpha=True)
    full = Image.frombytes("RGBA", [pix.width, pix.height], pix.samples)
    doc.close()

    rfh = pix.height / num_frames
    frames = []
    for i in range(num_frames):
        y1, y2 = round(i * rfh), round((i + 1) * rfh)
        frames.append(full.crop((0, y1, pix.width, y2)))
    return frames, native_w, frame_h


def process_macos(target_size=96):
    print("── macOS system cursors ──")
    rows, seen = [], set()

    for d in sorted(MACOS_CURSORS_DIR.iterdir()):
        if not d.is_dir():
            continue
        ct = MACOS_NAME_TO_TYPE.get(d.name)
        if not ct or ct in seen:
            continue
        plist_path = d / "info.plist"
        pdf_path = d / "cursor.pdf"
        if not plist_path.exists() or not pdf_path.exists():
            continue

        with open(plist_path, "rb") as f:
            info = plistlib.load(f)
        hotx, hoty = float(info.get("hotx", 0)), float(info.get("hoty", 0))
        nf = int(info.get("frames", 1))
        delay_s = float(info.get("delay", 0))

        try:
            frames, nw, nfh = render_pdf_frames(pdf_path, nf, target_size)
        except Exception as e:
            print(f"  SKIP {d.name}: render failed ({e})")
            continue

        hx = hotx / nw if nw else 0.5
        hy = hoty / nfh if nfh else 0.5

        padded, fhx, fhy, fsz = [], hx, hy, target_size
        for i, fr in enumerate(frames):
            pf, nhx, nhy, sz = pad_to_square(fr, hx, hy)
            padded.append(pf)
            if i == 0:
                fhx, fhy, fsz = nhx, nhy, sz

        seen.add(ct)
        rows.append(make_row(ct, "macos", padded, delay_s * 1000, fhx, fhy, fsz, "default"))
        print(f"  {d.name} → {ct} ({len(padded)} frames, {fsz}px)")

    # Arrow cursor via NSCursor (not on filesystem)
    if "arrow" not in seen:
        try:
            from AppKit import NSApplication, NSCursor
            NSApplication.sharedApplication()
            cur = NSCursor.arrowCursor()
            ns_img = cur.image()
            hs = cur.hotSpot()
            reps = ns_img.representations()
            best = max(reps, key=lambda r: r.pixelsWide())
            png_data = best.representationUsingType_properties_(4, None)
            img = Image.open(io.BytesIO(png_data)).convert("RGBA")

            pt_w, pt_h = ns_img.size().width, ns_img.size().height
            hx = hs.x / pt_w
            hy = hs.y / pt_h

            scale = target_size / max(img.size)
            img = img.resize(
                (int(img.width * scale), int(img.height * scale)), Image.LANCZOS
            )
            img, hx, hy, sz = pad_to_square(img, hx, hy)
            seen.add("arrow")
            rows.append(make_row("arrow", "macos", [img], 0, hx, hy, sz, "default"))
            print(f"  NSCursor.arrow → arrow ({sz}px)")
        except Exception as e:
            print(f"  WARNING: arrow cursor failed: {e}")

    print(f"  Total: {len(rows)} macOS cursors")
    return rows


# ── Adwaita ───────────────────────────────────────────────────────────────────

def process_adwaita(target_size=96):
    print("── Adwaita ──")
    base = CURSOR_DATASET / "system_themes" / "adwaita"
    if not base.exists():
        print("  NOT FOUND"); return []

    aliases = set()
    af = base / "_aliases.txt"
    if af.exists():
        for line in af.read_text().strip().splitlines():
            parts = line.split("->")
            if len(parts) == 2:
                aliases.add(parts[0].strip())

    rows, seen = [], set()
    for cd in sorted(base.iterdir()):
        if not cd.is_dir() or cd.name.startswith("_") or cd.name in aliases:
            continue
        ct = resolve_linux_type(cd.name)
        if not ct or ct in seen:
            continue

        sz_dir = cd / f"{target_size}px"
        if not sz_dir.exists():
            continue

        frame_dirs = sorted(
            [d for d in sz_dir.iterdir() if d.is_dir() and d.name.startswith("frame_")],
            key=lambda d: d.name,
        )

        frames, delay_ms, hs_file = [], 0, sz_dir / "hotspot.txt"
        if frame_dirs:
            for fd in frame_dirs:
                pngs = list(fd.glob("*.png"))
                if pngs:
                    frames.append(Image.open(pngs[0]).convert("RGBA"))
                if delay_ms == 0:
                    hf = fd / "hotspot.txt"
                    if hf.exists():
                        delay_ms = int(parse_hotspot_file(hf).get("delay", 0))
            hs_file = frame_dirs[0] / "hotspot.txt"
        else:
            pngs = list(sz_dir.glob("*.png"))
            if pngs:
                frames.append(Image.open(pngs[0]).convert("RGBA"))

        if not frames:
            continue

        hx, hy = hotspot_for(ct)
        if hs_file.exists():
            hsd = parse_hotspot_file(hs_file)
            w = int(hsd.get("width", target_size))
            h = int(hsd.get("height", target_size))
            hx = int(hsd.get("xhot", 0)) / w if w else 0.5
            hy = int(hsd.get("yhot", 0)) / h if h else 0.5

        seen.add(ct)
        sz = max(frames[0].size)
        rows.append(make_row(ct, "linux-adwaita", frames, delay_ms, hx, hy, sz, "default"))
        print(f"  {cd.name} → {ct} ({len(frames)} frames, {sz}px)")

    print(f"  Total: {len(rows)} Adwaita cursors")
    return rows


# ── SVG-rendered themes ───────────────────────────────────────────────────────

def process_svg_theme(theme, variant, target_size=96):
    base = CURSOR_DATASET / "rendered_from_svg" / f"{theme}_{variant}"
    if not base.exists():
        return []

    groups = defaultdict(list)
    for entry in base.iterdir():
        if not entry.is_dir():
            continue
        m = re.match(r"^(.+)_(\d+)px$", entry.name)
        if not m or int(m.group(2)) != target_size:
            continue
        cursor_name = m.group(1)
        bname, fnum = split_frame_name(cursor_name)
        groups[bname].append((fnum, entry, cursor_name))

    rows, seen = [], set()
    for bname, entries in sorted(groups.items()):
        ct = resolve_linux_type(bname)
        if not ct or ct in seen:
            continue

        has_numbered = any(fn is not None for fn, _, _ in entries)
        if has_numbered:
            entries = [(fn, p, cn) for fn, p, cn in entries if fn is not None]
            entries.sort(key=lambda x: x[0])
            animated = True
        else:
            animated = False

        frames = []
        for _, dir_path, _ in entries:
            pngs = list(dir_path.glob("*.png"))
            if pngs:
                try:
                    frames.append(Image.open(pngs[0]).convert("RGBA"))
                except Exception:
                    continue
        if not frames:
            continue

        hx, hy = hotspot_for(ct)
        seen.add(ct)
        sz = max(frames[0].size)
        os_name = THEME_TO_OS[theme]
        rows.append(make_row(ct, os_name, frames, 33 if animated else 0, hx, hy, sz, variant))

    return rows


def process_all_svg_themes():
    print("── SVG-rendered themes ──")
    rows = []
    for theme in ["apple_cursor", "bibata", "google_cursor", "notwaita", "xcursor_pro"]:
        for variant in ["black", "white"]:
            batch = process_svg_theme(theme, variant)
            if batch:
                print(f"  {theme}/{variant}: {len(batch)} cursors")
            rows.extend(batch)
    print(f"  Total: {len(rows)} SVG-rendered cursors")
    return rows


# ── Google pre-built ──────────────────────────────────────────────────────────

def process_google_prebuilt():
    print("── Google pre-built ──")
    all_rows = []
    variants = [
        ("GoogleDot-Black", "black"), ("GoogleDot-Blue", "blue"),
        ("GoogleDot-Red", "red"), ("GoogleDot-White", "white"),
    ]
    for vdir, vname in variants:
        base = CURSOR_DATASET / "open_source_themes" / "google_cursor" / vdir
        if not base.exists():
            continue

        groups = defaultdict(list)
        for f in base.iterdir():
            if f.suffix.lower() != ".png":
                continue
            bname, fnum = split_frame_name(f.stem)
            groups[bname].append((fnum, f))

        rows, seen = [], set()
        for bname, entries in sorted(groups.items()):
            ct = resolve_linux_type(bname)
            if not ct or ct in seen:
                continue

            has_numbered = any(fn is not None for fn, _ in entries)
            if has_numbered:
                entries = [(fn, p) for fn, p in entries if fn is not None]
                entries.sort(key=lambda x: x[0])
                animated = True
            else:
                animated = False

            frames = []
            for _, fpath in entries:
                try:
                    frames.append(Image.open(fpath).convert("RGBA"))
                except Exception:
                    continue
            if not frames:
                continue

            hx, hy = hotspot_for(ct)
            seen.add(ct)
            sz = max(frames[0].size)
            rows.append(make_row(ct, "linux-google-cursor", frames,
                                 33 if animated else 0, hx, hy, sz, vname))

        print(f"  {vdir}: {len(rows)} cursors")
        all_rows.extend(rows)

    print(f"  Total: {len(all_rows)} Google pre-built cursors")
    return all_rows


# ── Dedup & push ──────────────────────────────────────────────────────────────

def deduplicate(rows):
    best = {}
    for r in rows:
        key = (r["cursor_type"], r["os"], r["variant"])
        if key not in best or r["size_px"] > best[key]["size_px"]:
            best[key] = r
    return list(best.values())


# Themes whose X11 "move" cursor is a closed hand (visually identical to
# "grabbing") rather than the standard four-way arrow.  Reclassify so the
# label matches the visual appearance for grounding tasks.
_MOVE_IS_GRABBING = {"linux-apple-cursor", "linux-xcursor-pro"}


def fix_visual_labels(rows):
    existing = {(r["cursor_type"], r["os"], r["variant"]) for r in rows}
    fixed = 0
    for r in rows:
        if (
            r["cursor_type"] == "move"
            and r["os"] in _MOVE_IS_GRABBING
            and ("grabbing", r["os"], r["variant"]) not in existing
        ):
            r["cursor_type"] = "grabbing"
            r["hotspot_x"], r["hotspot_y"] = hotspot_for("grabbing")
            existing.discard(("move", r["os"], r["variant"]))
            existing.add(("grabbing", r["os"], r["variant"]))
            fixed += 1
    if fixed:
        print(f"  Reclassified {fixed} move → grabbing (hand-shaped move cursors)")
    return rows


def build_and_push(rows):
    from datasets import Dataset, Features, Sequence, Value
    from datasets import Image as HFImage

    data = {k: [] for k in [
        "cursor_type", "os", "frames", "frame_delay_ms",
        "hotspot_x", "hotspot_y", "size_px", "variant",
    ]}
    for r in rows:
        for k in data:
            data[k].append(r[k])

    features = Features({
        "cursor_type": Value("string"),
        "os": Value("string"),
        "frames": Sequence(HFImage()),
        "frame_delay_ms": Value("int32"),
        "hotspot_x": Value("float32"),
        "hotspot_y": Value("float32"),
        "size_px": Value("int32"),
        "variant": Value("string"),
    })

    ds = Dataset.from_dict(data, features=features)
    print(f"\nDataset: {len(ds)} rows")
    print(ds)
    ds.push_to_hub("Fraser/cursors")
    print("Pushed to Fraser/cursors")


# ── Main ──────────────────────────────────────────────────────────────────────

def main():
    rows = []
    rows.extend(process_macos())
    rows.extend(process_adwaita())
    rows.extend(process_all_svg_themes())
    rows.extend(process_google_prebuilt())

    print(f"\nBefore dedup: {len(rows)} rows")
    rows = deduplicate(rows)
    print(f"After dedup:  {len(rows)} rows")
    rows = fix_visual_labels(rows)

    by_os = defaultdict(int)
    for r in rows:
        by_os[r["os"]] += 1
    for k, v in sorted(by_os.items()):
        print(f"  {k}: {v}")

    build_and_push(rows)


if __name__ == "__main__":
    main()