#!/usr/bin/env python3
"""
Process one pending JSON file into the docs/ structure using Claude.

Usage:
    venv/bin/python python/process.py

Run multiple times in parallel to process faster.
"""

import subprocess
import sys
import re
import fcntl
from pathlib import Path

PROJECT_ROOT = Path(__file__).parent.parent
PROCESSED_MD = PROJECT_ROOT / "processed.md"
LOCK_FILE = PROJECT_ROOT / ".process_lock"

PROMPT_TEMPLATE = '''Process this ONE scraped JSON file into the docs/ folder structure.

File to process: {json_file}

Steps:
1. Read the JSON file from scraped_data/
2. Extract game entities (buildings, goods, etc.)
3. Translate German to English:
   - Latium = Latium (Roman region)
   - Albion = Albion (Celtic region)
   - Liberti = Liberti (Tier 1 Roman)
   - Plebejer = Plebeians (Tier 2 Roman)
   - Equites = Equites (Tier 3 Roman)
   - Patrizier = Patricians (Tier 4 Roman)
   - Wanderer = Waders (Tier 1 Celtic)
   - Schmiede = Smiths (Tier 2 Celtic)
   - Älteste = Elders (Tier 3 Celtic)
   - Mercatoren = Mercators (Tier 4 Celtic)
   - Edelmänner = Nobles (Tier 5 Celtic)
4. Determine the entity type and target folder:
   - anno-117-buildings_* → docs/buildings/
   - anno-117-goods_* → docs/goods/
   - anno-117-specialists* → docs/specialists/
   - Other files → skip (just mark as done)
5. Check if a markdown file already exists for this entity:
   - If YES: Read the existing file, MERGE new data with existing data.
     Keep existing values, add new fields, update "Unknown" values with actual data.
   - If NO: Create a new markdown file using the schema format.
6. Update the category _index.md:
   - If entity already listed: skip
   - If not listed: add a link to the entity in the appropriate section
7. Mark the file as processed in processed.md (change `- [~] {json_file}` to `- [x] {json_file}`)

IMPORTANT for merging:
- Preserve existing data that is more specific than "Unknown"
- Add any new fields from the JSON that are missing in the existing file
- Update "Unknown" values with actual values from the JSON
- Keep cross-references and links intact

Use the existing files in docs/ as examples for formatting.
Keep entries concise. Mark unknown values as "Unknown".
'''


def claim_pending_file():
    """Atomically claim a pending file using file locking."""
    LOCK_FILE.touch(exist_ok=True)

    with open(LOCK_FILE, 'r+') as lock:
        fcntl.flock(lock.fileno(), fcntl.LOCK_EX)
        try:
            content = PROCESSED_MD.read_text(encoding="utf-8")

            # Find first pending file
            match = re.search(r"^- \[ \] (.+\.json)$", content, re.MULTILINE)
            if not match:
                return None

            json_file = match.group(1)

            # Mark as in-progress with a special marker
            content = content.replace(
                f"- [ ] {json_file}",
                f"- [~] {json_file}"  # ~ means in-progress
            )
            PROCESSED_MD.write_text(content, encoding="utf-8")

            return json_file
        finally:
            fcntl.flock(lock.fileno(), fcntl.LOCK_UN)


def mark_completed(json_file: str):
    """Mark file as completed."""
    content = PROCESSED_MD.read_text(encoding="utf-8")
    content = content.replace(f"- [~] {json_file}", f"- [x] {json_file}")
    PROCESSED_MD.write_text(content, encoding="utf-8")


def mark_failed(json_file: str):
    """Revert file to pending if processing failed."""
    content = PROCESSED_MD.read_text(encoding="utf-8")
    content = content.replace(f"- [~] {json_file}", f"- [ ] {json_file}")
    PROCESSED_MD.write_text(content, encoding="utf-8")


def process_file(json_file: str) -> bool:
    """Run Claude to process the file."""
    prompt = PROMPT_TEMPLATE.format(json_file=json_file)

    try:
        result = subprocess.run(
            ["claude", "-p", prompt, "--allowedTools", "Read,Write,Edit,Glob"],
            cwd=PROJECT_ROOT,
            capture_output=True,
            text=True,
            timeout=300  # 5 minute timeout
        )

        if result.returncode != 0:
            print(f"Claude error: {result.stderr}", file=sys.stderr)
            return False

        print(result.stdout)
        return True

    except subprocess.TimeoutExpired:
        print(f"Timeout processing {json_file}", file=sys.stderr)
        return False
    except Exception as e:
        print(f"Error: {e}", file=sys.stderr)
        return False


def main():
    json_file = claim_pending_file()

    if not json_file:
        print("No pending files to process")
        return

    print(f"Processing: {json_file}")

    if process_file(json_file):
        mark_completed(json_file)
        print(f"Completed: {json_file}")
    else:
        mark_failed(json_file)
        print(f"Failed: {json_file}", file=sys.stderr)
        sys.exit(1)


if __name__ == "__main__":
    main()