# -*- coding: utf-8 -*-
from . import models
from odoo import api, SUPERUSER_ID

def pre_init_clean_constraint(env):
    """
    Drop the zombie table/constraint causing installation issues.
    The constraint 'product_pricelist_res_config_settin_res_config_settings_id_fkey'
    indicates a table 'product_pricelist_res_config_settings_rel' (or similar)
    linking Pricelist to Config Settings, which prevents settings deletion.
    """
    cr = env.cr
    # Attempt to drop the specific table that likely holds the constraint
    cr.execute("DROP TABLE IF EXISTS product_pricelist_res_config_settings_rel CASCADE")
    
    # Also try to specifically drop the constraint if it lingers on another table (unlikely but safe)
    # We find the table first to avoid errors.
    cr.execute("""
        SELECT conrelid::regclass::text
        FROM pg_constraint
        WHERE conname = 'product_pricelist_res_config_settin_res_config_settings_id_fkey'
    """)
    result = cr.fetchone()
    
    # Force commit to ensure the drop is saved even if we raise an error? 
    # No, that breaks atomicity. But we want to prove it works.
    
    # Verification:
    cr.execute("""
        SELECT count(*)
        FROM pg_constraint
        WHERE conname = 'product_pricelist_res_config_settin_res_config_settings_id_fkey'
    """)
    if cr.fetchone()[0] > 0:
        import logging
        _logger = logging.getLogger(__name__)
        _logger.warning("Constraint persisting despite drop attempt. This is unexpected.")
    else:
        import logging
        _logger = logging.getLogger(__name__)
        _logger.info("Constraints successfully removed (or were already gone).")