#!/usr/bin/env python3
"""
Upload ARC puzzle data to MariaDB database
Reads credentials from .env file and inserts all JSON files
"""

import json
import os
import sys
from pathlib import Path
import pymysql
from dotenv import load_dotenv

# Force unbuffered output
sys.stdout.reconfigure(line_buffering=True)
sys.stderr.reconfigure(line_buffering=True)

def load_env_config():
    """Load database configuration from .env file"""
    load_dotenv()

    config = {
        'host': os.getenv('DB_HOST'),
        'user': os.getenv('DB_USER'),
        'password': os.getenv('DB_PASSWORD'),
        'database': os.getenv('DB_NAME'),
        'port': int(os.getenv('DB_PORT', 3306)),
        'charset': 'utf8mb4'
    }

    return config

def get_all_json_files():
    """Get all JSON files from training and evaluation directories"""
    base_dir = Path('arc_data')

    training_files = sorted(base_dir.glob('training/*.json'))
    evaluation_files = sorted(base_dir.glob('evaluation/*.json'))

    return training_files + evaluation_files

def insert_puzzle(cursor, file_path):
    """Insert a single puzzle into the database"""
    # Extract ID from filename
    puzzle_id = file_path.stem

    # Read JSON content
    with open(file_path, 'r') as f:
        json_content = f.read().strip()

    # Insert into database using parameterized query (prevents SQL injection)
    sql = "INSERT INTO arc_jsons (id, json) VALUES (%s, %s)"
    cursor.execute(sql, (puzzle_id, json_content))

    return puzzle_id

def main():
    print("ARC Data Upload to MariaDB")
    print("=" * 50)

    # Load configuration
    try:
        config = load_env_config()
        print(f"✓ Loaded configuration from .env")
        print(f"  Host: {config['host']}")
        print(f"  Database: {config['database']}")
        print(f"  User: {config['user']}")
    except Exception as e:
        print(f"✗ Error loading configuration: {e}")
        return 1

    # Get all files
    all_files = get_all_json_files()
    print(f"✓ Found {len(all_files)} JSON files")

    # Connect to database
    try:
        print(f"\nConnecting to database...")
        connection = pymysql.connect(**config)
        print(f"✓ Connected successfully")
    except Exception as e:
        print(f"✗ Database connection failed: {e}")
        return 1

    try:
        cursor = connection.cursor()

        # Check if table exists
        cursor.execute("SHOW TABLES LIKE 'arc_jsons'")
        if not cursor.fetchone():
            print(f"✗ Table 'arc_jsons' does not exist")
            return 1

        # Get current count
        cursor.execute("SELECT COUNT(*) FROM arc_jsons")
        initial_count = cursor.fetchone()[0]
        print(f"✓ Table 'arc_jsons' exists (current rows: {initial_count})")

        # Ask for confirmation (unless --yes flag is provided)
        if '--yes' not in sys.argv:
            print(f"\n⚠ About to insert {len(all_files)} records")
            response = input("Continue? (yes/no): ").strip().lower()
            if response not in ['yes', 'y']:
                print("Upload cancelled")
                return 0
        else:
            print(f"\n⚠ About to insert {len(all_files)} records (auto-confirmed with --yes flag)")

        print(f"\nInserting records...")
        inserted = 0
        errors = 0

        for i, file_path in enumerate(all_files, 1):
            try:
                puzzle_id = insert_puzzle(cursor, file_path)
                inserted += 1

                # Show progress every 100 records
                if i % 100 == 0 or i == len(all_files):
                    print(f"  Progress: {i}/{len(all_files)} ({inserted} inserted, {errors} errors)")

            except pymysql.IntegrityError as e:
                # Likely duplicate key
                if "Duplicate entry" in str(e):
                    errors += 1
                    if errors <= 5:  # Only show first 5 errors
                        print(f"  ⚠ Duplicate: {file_path.stem}")
                else:
                    raise
            except Exception as e:
                errors += 1
                print(f"  ✗ Error with {file_path.stem}: {e}")
                if errors > 10:
                    print(f"  Too many errors, stopping...")
                    break

        # Commit the transaction
        connection.commit()

        # Get final count
        cursor.execute("SELECT COUNT(*) FROM arc_jsons")
        final_count = cursor.fetchone()[0]

        print(f"\n{'=' * 50}")
        print(f"✓ Upload complete!")
        print(f"  Successfully inserted: {inserted}")
        print(f"  Errors/duplicates: {errors}")
        print(f"  Database rows: {initial_count} → {final_count} (+{final_count - initial_count})")

    except Exception as e:
        connection.rollback()
        print(f"\n✗ Error during upload: {e}")
        return 1
    finally:
        connection.close()
        print(f"\n✓ Database connection closed")

    return 0

if __name__ == '__main__':
    sys.exit(main())