#!/usr/bin/env python3
"""
CSV Uploader - Upload seed_tracker CSV output to NocoDB.

For use when others generate CSVs with --csv-only and send them to you for upload.
"""

import argparse
import csv
import json
import sys
import time
import urllib.request
import urllib.error
from pathlib import Path


class NocoDBClient:
    """Simple NocoDB API client."""

    ID_FIELD = "Id"
    SEEDING_FIELD = "Seeding Users"

    def __init__(self, base_url: str, table_id: str, api_token: str):
        self.base_url = base_url.rstrip('/')
        self.table_id = table_id
        self.api_token = api_token
        self.endpoint = f"{self.base_url}/api/v2/tables/{table_id}/records"
    
    def _request(self, method: str, data: dict | None = None, params: dict | None = None) -> dict:
        url = self.endpoint
        if params:
            query = "&".join(f"{k}={urllib.request.quote(str(v))}" for k, v in params.items())
            url = f"{url}?{query}"
        
        headers = {
            "xc-token": self.api_token,
            "Content-Type": "application/json",
            "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36",
            "Accept": "application/json",
        }
        
        body = json.dumps(data).encode('utf-8') if data else None
        req = urllib.request.Request(url, data=body, headers=headers, method=method)
        
        try:
            with urllib.request.urlopen(req, timeout=30) as response:
                return json.loads(response.read().decode('utf-8'))
        except urllib.error.HTTPError as e:
            error_body = e.read().decode('utf-8') if e.fp else ""
            raise Exception(f"HTTP {e.code}: {error_body}")
    
    def get_record(self, record_id: int | str) -> dict | None:
        try:
            params = {"where": f"({self.ID_FIELD},eq,{record_id})", "limit": "1"}
            result = self._request("GET", params=params)
            records = result.get("list", [])
            return records[0] if records else None
        except Exception:
            return None
    
    def update_record(self, row_id: int, value: str) -> bool:
        try:
            data = {"Id": row_id, self.SEEDING_FIELD: value}
            self._request("PATCH", data=data)
            return True
        except Exception as e:
            print(f"    API error: {e}", file=sys.stderr)
            return False


def parse_multiselect(value) -> set[str]:
    if value is None:
        return set()
    if isinstance(value, list):
        return set(value)
    if isinstance(value, str):
        if not value.strip():
            return set()
        return set(v.strip() for v in value.split(','))
    return set()


def format_multiselect(values: set[str]) -> str:
    if not values:
        return ""
    return ",".join(sorted(values))


def main():
    parser = argparse.ArgumentParser(
        description='Upload seed_tracker CSV to NocoDB.',
        formatter_class=argparse.RawDescriptionHelpFormatter,
        epilog="""
Example:
  %(prog)s --csv seeds.csv --nocodb-url https://noco.example.com \\
           --table-id xxxxxxxxxxxxx --api-token xc-xxx
        """
    )
    
    parser.add_argument('--csv', required=True, type=Path,
                        help='CSV file to upload (Id,seeding_users columns)')
    parser.add_argument('--nocodb-url', required=True, type=str,
                        help='NocoDB base URL')
    parser.add_argument('--table-id', required=True, type=str,
                        help='Table ID')
    parser.add_argument('--api-token', required=True, type=str,
                        help='API token')
    
    args = parser.parse_args()
    
    if not args.csv.exists():
        print(f"Error: CSV file not found: {args.csv}", file=sys.stderr)
        sys.exit(1)
    
    # Read CSV
    with open(args.csv, 'r', newline='', encoding='utf-8') as f:
        reader = csv.DictReader(f)
        rows = list(reader)
    
    print(f"Loaded {len(rows)} rows from {args.csv}")
    
    # Connect
    noco = NocoDBClient(args.nocodb_url, args.table_id, args.api_token)
    
    print("Testing connection...")
    try:
        noco._request("GET", params={"limit": "1"})
        print("  ✓ Connected!")
    except Exception as e:
        print(f"  ✗ Connection failed: {e}", file=sys.stderr)
        sys.exit(1)
    
    # Process
    print(f"\nUpdating records...")
    stats = {'updated': 0, 'already': 0, 'not_found': 0, 'failed': 0}
    
    for i, row in enumerate(rows, 1):
        record_id = row.get('Id') or row.get('id')
        username = row.get('seeding_users') or row.get('Seeding_Users')
        
        if not record_id or not username:
            continue
        
        record = noco.get_record(record_id)
        
        if record is None:
            print(f"  ? {record_id}: not found")
            stats['not_found'] += 1
            continue
        
        current = parse_multiselect(record.get(noco.SEEDING_FIELD))
        
        if username in current:
            print(f"  = {record_id}: already listed")
            stats['already'] += 1
            continue
        
        current.add(username)
        
        if noco.update_record(record["Id"], format_multiselect(current)):
            print(f"  + {record_id}: added {username}")
            stats['updated'] += 1
        else:
            print(f"  ! {record_id}: failed")
            stats['failed'] += 1
        
        if i % 3 == 0:
            time.sleep(1)
    
    # Summary
    print(f"\nDone!")
    print(f"  Updated:    {stats['updated']}")
    print(f"  Already:    {stats['already']}")
    print(f"  Not found:  {stats['not_found']}")
    print(f"  Failed:     {stats['failed']}")


if __name__ == '__main__':
    main()