#!/usr/bin/env python3

import json
import pandas as pd
import shutil
from pathlib import Path
import jsonlines

def load_jsonlines(fpath):
    with jsonlines.open(fpath, "r") as reader:
        return list(reader)

def convert_local_dataset():
    root = Path(".")
    
    # Load info.json
    with open("meta/info.json", "r") as f:
        info = json.load(f)
    
    # Update to v3.0
    info["codebase_version"] = "v3.0"
    
    # Remove deprecated fields
    if "total_chunks" in info:
        del info["total_chunks"]
    if "total_videos" in info:
        del info["total_videos"]
    
    # Add new v3.0 fields
    info["data_files_size_in_mb"] = 100
    info["video_files_size_in_mb"] = 500
    info["data_path"] = "data/chunk-{chunk_index:03d}/file_{file_index:03d}.parquet"
    info["video_path"] = "videos/chunk-{chunk_index:03d}/{video_key}/file_{file_index:03d}.mp4"
    
    # Convert fps to float
    info["fps"] = float(info["fps"])
    
    # Add fps to all non-video features
    for key in info["features"]:
        if info["features"][key]["dtype"] != "video":
            info["features"][key]["fps"] = info["fps"]
    
    # Write updated info.json
    with open("meta/info.json", "w") as f:
        json.dump(info, f, indent=4)
    
    # Convert tasks.jsonl to tasks.json (v3.0 format)
    if Path("meta/tasks.jsonl").exists():
        tasks = load_jsonlines(Path("meta/tasks.jsonl"))
        tasks_dict = {str(task["task_index"]): task["task"] for task in tasks}
        
        with open("meta/tasks.json", "w") as f:
            json.dump(tasks_dict, f, indent=4)
        
        # Remove old file
        Path("meta/tasks.jsonl").unlink()
    
    # Convert episodes.jsonl to episodes.json (v3.0 format)  
    if Path("meta/episodes.jsonl").exists():
        episodes = load_jsonlines(Path("meta/episodes.jsonl"))
        episodes_dict = {str(ep["episode_index"]): ep for ep in episodes}
        
        with open("meta/episodes.json", "w") as f:
            json.dump(episodes_dict, f, indent=4)
        
        # Remove old file
        Path("meta/episodes.jsonl").unlink()
    
    # Convert episodes_stats.jsonl to episodes_stats.json
    if Path("meta/episodes_stats.jsonl").exists():
        stats = load_jsonlines(Path("meta/episodes_stats.jsonl"))
        stats_dict = {str(stat["episode_index"]): stat for stat in stats}
        
        with open("meta/episodes_stats.json", "w") as f:
            json.dump(stats_dict, f, indent=4)
        
        # Remove old file
        Path("meta/episodes_stats.jsonl").unlink()
    
    print("Dataset successfully converted from v2.1 to v3.0")
    print("Updated files:")
    print("- meta/info.json (codebase_version updated to v3.0)")
    print("- meta/tasks.jsonl -> meta/tasks.json")
    print("- meta/episodes.jsonl -> meta/episodes.json") 
    print("- meta/episodes_stats.jsonl -> meta/episodes_stats.json")

if __name__ == "__main__":
    convert_local_dataset()