#!/usr/bin/env python3
  """
  Import test data into MySQL Shoplazza tables.
  
  Reads SQL file generated by generate_test_data.py and imports into MySQL.
  """
  
  import sys
  import os
  import argparse
  from pathlib import Path
  
  # Add parent directory to path
  sys.path.insert(0, str(Path(__file__).parent.parent))
  
  from utils.db_connector import create_db_connection, test_connection
  
  
  def import_sql_file(db_engine, sql_file: str):
      """
      Import SQL file into database.
  
      Args:
          db_engine: SQLAlchemy database engine
          sql_file: Path to SQL file
      """

      from sqlalchemy import text
      

      with open(sql_file, 'r', encoding='utf-8') as f:
          sql_content = f.read()
      

      # More robust SQL statement parsing
      # Handle multi-line statements and quoted strings properly
      statements = []
      current_statement = []
      in_string = False
      string_char = None
      i = 0

      while i < len(sql_content):
          char = sql_content[i]
          
          # Track string boundaries (single quotes)
          if char in ("'", '"') and (i == 0 or sql_content[i-1] != '\\'):
              if not in_string:
                  in_string = True
                  string_char = char
              elif char == string_char:
                  in_string = False
                  string_char = None
          
          current_statement.append(char)
          
          # Only split on semicolon if not inside a string
          if char == ';' and not in_string:
              stmt = ''.join(current_statement).strip()
              # Remove comments
              if '--' in stmt:
                  # Only remove comments that are not inside strings
                  parts = []
                  in_quote = False
                  quote_char = None
                  j = 0
                  while j < len(stmt):
                      c = stmt[j]
                      if c in ("'", '"') and (j == 0 or stmt[j-1] != '\\'):
                          if not in_quote:
                              in_quote = True
                              quote_char = c
                          elif c == quote_char:
                              in_quote = False
                              quote_char = None
                      if c == '-' and j < len(stmt) - 1 and stmt[j+1] == '-' and not in_quote:
                          # Found comment marker outside string
                          break
                      parts.append(c)
                      j += 1
                  stmt = ''.join(parts).strip()
              
              if stmt and not stmt.startswith('--'):
                  statements.append(stmt)
              current_statement = []
          
          i += 1
      
      # Handle last statement if no semicolon at end
      if current_statement:
          stmt = ''.join(current_statement).strip()
          if stmt and not stmt.startswith('--'):
              statements.append(stmt)

      
      print(f"Executing {len(statements)} SQL statements...")
      
      with db_engine.connect() as conn:
          for i, statement in enumerate(statements, 1):
              if statement:
                  try:

                      conn.execute(text(statement))

                      conn.commit()
                      print(f"  [{i}/{len(statements)}] Executed successfully")
                  except Exception as e:
                      print(f"  [{i}/{len(statements)}] ERROR: {e}")

                      # Show more context for debugging
                      error_start = max(0, statement.find('VALUES') - 100)
                      error_end = min(len(statement), error_start + 500)
                      print(f"  Statement context: ...{statement[error_start:error_end]}...")

                      raise
  
  
  def verify_import(db_engine, tenant_id: str):
      """
      Verify imported data.
  
      Args:
          db_engine: SQLAlchemy database engine
          tenant_id: Tenant ID to verify
      """
      from sqlalchemy import text
      
      with db_engine.connect() as conn:
          # Count SPUs
          result = conn.execute(text("SELECT COUNT(*) FROM shoplazza_product_spu WHERE tenant_id = :tenant_id"), {"tenant_id": tenant_id})
          spu_count = result.scalar()
          
          # Count SKUs
          result = conn.execute(text("SELECT COUNT(*) FROM shoplazza_product_sku WHERE tenant_id = :tenant_id"), {"tenant_id": tenant_id})
          sku_count = result.scalar()
          
          print(f"\nVerification:")
          print(f"  SPUs: {spu_count}")
          print(f"  SKUs: {sku_count}")
          
          return spu_count, sku_count
  
  
  def main():
      parser = argparse.ArgumentParser(description='Import test data into MySQL')
      
      # Database connection
      parser.add_argument('--db-host', required=True, help='MySQL host')
      parser.add_argument('--db-port', type=int, default=3306, help='MySQL port (default: 3306)')
      parser.add_argument('--db-database', required=True, help='MySQL database name')
      parser.add_argument('--db-username', required=True, help='MySQL username')
      parser.add_argument('--db-password', required=True, help='MySQL password')
      
      # Import options
      parser.add_argument('--sql-file', required=True, help='SQL file to import')
      parser.add_argument('--tenant-id', help='Tenant ID to verify (optional)')
      
      args = parser.parse_args()
  
      print(f"Connecting to MySQL: {args.db_host}:{args.db_port}/{args.db_database}")
      
      # Connect to database
      try:
          db_engine = create_db_connection(
              host=args.db_host,
              port=args.db_port,
              database=args.db_database,
              username=args.db_username,
              password=args.db_password
          )
      except Exception as e:
          print(f"ERROR: Failed to connect to MySQL: {e}")
          return 1
  
      # Test connection
      if not test_connection(db_engine):
          print("ERROR: Database connection test failed")
          return 1
  
      print("Database connection successful")
  

      # Clean existing data if tenant_id provided
      if args.tenant_id:
          print(f"\nCleaning existing data for tenant_id: {args.tenant_id}")
          from sqlalchemy import text
          try:
              with db_engine.connect() as conn:
                  # Delete SKUs first (foreign key constraint)
                  conn.execute(text(f"DELETE FROM shoplazza_product_sku WHERE tenant_id = '{args.tenant_id}'"))
                  # Delete SPUs
                  conn.execute(text(f"DELETE FROM shoplazza_product_spu WHERE tenant_id = '{args.tenant_id}'"))
                  conn.commit()
                  print("✓ Existing data cleaned")
          except Exception as e:
              print(f"⚠ Warning: Failed to clean existing data: {e}")
              # Continue anyway
  

      # Import SQL file
      print(f"\nImporting SQL file: {args.sql_file}")
      try:
          import_sql_file(db_engine, args.sql_file)
          print("Import completed successfully")
      except Exception as e:
          print(f"ERROR: Failed to import SQL file: {e}")
          import traceback
          traceback.print_exc()
          return 1
  
      # Verify import if tenant_id provided
      if args.tenant_id:
          verify_import(db_engine, args.tenant_id)
  
      return 0
  
  
  if __name__ == '__main__':
      sys.exit(main())