#!/usr/bin/env python3
import json
import logging
from pathlib import Path

# ---------------------------------------------------------------------------
# Config
# ---------------------------------------------------------------------------

ROOT = Path(__file__).parent.parent.parent
SOURCE_DIR = ROOT / "source" / "plans" / "detail"
OUTPUT_FILE = ROOT / "data" / "plans.jsonl"
PREFIX = "plan"

logging.basicConfig(level=logging.INFO, format="%(message)s")
log = logging.getLogger(__name__)

# ---------------------------------------------------------------------------
# Mapper
# ---------------------------------------------------------------------------

def transform_plan(data: dict) -> dict:
    """Flatten plan JSON into a ChromaDB-ready format."""
    
    chroma_id = f"{PREFIX}:{data['slug']}"
    
    # Searchable text: Title, source, and style
    title = data.get('title')
    source = data.get('source')
    style = data.get('style')
    site = data.get('site', {}).get('name')
    
    summary = f"Rocket Plan: {title}"
    if source: summary += f" (Source: {source})"
    summary += f" in {style or 'Standard'} style."
    if site: summary += f" Hosted on {site}."
    
    document = summary
    
    # Metadata
    metadata = {
        "slug": data["slug"],
        "title": title,
        "source": source,
        "style": style,
        "site_name": site,
        "url": data.get("url"),
        "external_url": data.get("site", {}).get("url")
    }
    
    metadata = {k: v for k, v in metadata.items() if v is not None}
    
    return {
        "id": chroma_id,
        "document": document,
        "metadata": metadata
    }

# ---------------------------------------------------------------------------
# Main
# ---------------------------------------------------------------------------

def main():
    if not SOURCE_DIR.exists():
        log.error(f"Source directory {SOURCE_DIR} not found.")
        return

    OUTPUT_FILE.parent.mkdir(parents=True, exist_ok=True)
    
    count = 0
    with OUTPUT_FILE.open("w", encoding="utf-8") as out:
        for shard_dir in sorted(SOURCE_DIR.iterdir()):
            if not shard_dir.is_dir(): continue
            for file_path in sorted(shard_dir.glob("*.json")):
                try:
                    with file_path.open("r", encoding="utf-8") as f:
                        raw_data = json.load(f)
                    processed = transform_plan(raw_data)
                    out.write(json.dumps(processed, ensure_ascii=False) + "\n")
                    count += 1
                except Exception as e:
                    log.error(f"Error processing {file_path}: {e}")

    log.info(f"Successfully built {count} records in {OUTPUT_FILE}")

if __name__ == "__main__":
    main()