#!/usr/bin/env python3
"""Prepare the TEXEDO dataset layout for Hugging Face upload."""

from __future__ import annotations

import json
import os
import shutil
from pathlib import Path


SRC_ROOT = Path("/home/jianuo/projects/MotionGPT/datasets/CustomCombined")
OUT_ROOT = Path("/home/jianuo/projects/MotionGPT/datasets/TEXEDO_dataset")

SPLITS = {
    "train": "train",
    "val": "validation",
    "test": "test",
}


def source_name(raw: str) -> str:
    if raw == "textseedo":
        return "claw"
    return raw


def bucket_for(sample_id: str) -> str:
    return sample_id[:3]


def link_or_copy(src: Path, dst: Path) -> None:
    dst.parent.mkdir(parents=True, exist_ok=True)
    if dst.exists():
        return
    try:
        os.link(src, dst)
    except OSError:
        shutil.copy2(src, dst)


def parse_text_file(path: Path) -> list[dict[str, object]]:
    captions = []
    for line in path.read_text(encoding="utf-8").splitlines():
        line = line.strip()
        if not line:
            continue
        parts = line.split("#")
        caption = parts[0]
        tokens = parts[1].split() if len(parts) > 1 and parts[1] else []
        start = float(parts[2]) if len(parts) > 2 and parts[2] else 0.0
        end = float(parts[3]) if len(parts) > 3 and parts[3] else 0.0
        captions.append(
            {
                "caption": caption,
                "tokens": tokens,
                "start_time": start,
                "end_time": end,
            }
        )
    return captions


def read_ids(split: str) -> list[str]:
    return (SRC_ROOT / f"{split}.txt").read_text(encoding="utf-8").split()


def main() -> None:
    match_info = json.loads((SRC_ROOT / "match_info.json").read_text(encoding="utf-8"))
    info_by_id = {item["new_id"]: item for item in match_info}

    (OUT_ROOT / "data").mkdir(parents=True, exist_ok=True)
    (OUT_ROOT / "metadata").mkdir(parents=True, exist_ok=True)

    summary = {
        "dataset": "TEXEDO_dataset",
        "source_root": str(SRC_ROOT),
        "num_samples": 0,
        "splits": {},
        "sources": {},
        "fields": [
            "id",
            "split",
            "source",
            "motion_path",
            "text_path",
            "num_frames",
            "motion_dim",
            "num_texts",
            "captions",
        ],
    }

    all_rows = []

    for original_split, hf_split in SPLITS.items():
        ids = read_ids(original_split)
        (OUT_ROOT / f"{original_split}.txt").write_text(
            "\n".join(ids) + "\n", encoding="utf-8"
        )

        rows = []
        for sample_id in ids:
            if sample_id not in info_by_id:
                raise KeyError(f"{sample_id} is missing from match_info.json")

            item = info_by_id[sample_id]
            src = source_name(item["source"])
            bucket = bucket_for(sample_id)

            motion_src = SRC_ROOT / "new_joint_vecs" / f"{sample_id}.npy"
            text_src = SRC_ROOT / "texts" / f"{sample_id}.txt"
            if not motion_src.exists():
                raise FileNotFoundError(motion_src)
            if not text_src.exists():
                raise FileNotFoundError(text_src)

            motion_rel = Path("motions") / src / bucket / f"{sample_id}.npy"
            text_rel = Path("texts") / src / bucket / f"{sample_id}.txt"
            link_or_copy(motion_src, OUT_ROOT / motion_rel)
            link_or_copy(text_src, OUT_ROOT / text_rel)

            row = {
                "id": sample_id,
                "split": hf_split,
                "source": src,
                "motion_path": motion_rel.as_posix(),
                "text_path": text_rel.as_posix(),
                "num_frames": int(item["num_frames"]),
                "motion_dim": 36,
                "num_texts": int(item["num_texts"]),
                "captions": parse_text_file(text_src),
            }
            rows.append(row)
            all_rows.append(row)

            summary["sources"][src] = summary["sources"].get(src, 0) + 1

        out_jsonl = OUT_ROOT / "data" / f"{hf_split}.jsonl"
        with out_jsonl.open("w", encoding="utf-8") as f:
            for row in rows:
                f.write(json.dumps(row, ensure_ascii=False) + "\n")

        summary["splits"][hf_split] = {
            "num_samples": len(rows),
            "file": f"data/{hf_split}.jsonl",
        }

    with (OUT_ROOT / "data" / "all.jsonl").open("w", encoding="utf-8") as f:
        for row in all_rows:
            f.write(json.dumps(row, ensure_ascii=False) + "\n")

    summary["num_samples"] = len(all_rows)
    (OUT_ROOT / "metadata" / "dataset_summary.json").write_text(
        json.dumps(summary, indent=2, ensure_ascii=False) + "\n", encoding="utf-8"
    )


if __name__ == "__main__":
    main()