import logging
from typing import Any

log = logging.getLogger('root')

def validate_critical_config(settings: Any):
    """
    Validates that essential settings are populated and not using placeholders.
    Logs warnings or errors for missing critical infrastructure.
    """
    log.info("Checking critical system configuration...")
    
    # 1. Database Check
    db = getattr(settings, 'DB', {})
    if not db.get('server') or db.get('server') == 'mariadb':
        # 'mariadb' is the default in .env, usually fine, but worth noting
        log.info(f"Database server: {db.get('server')}")
    
    # 2. SMTP Check
    smtp = getattr(settings, 'SMTP', {})
    if not smtp.get('server'):
        log.warning("CRITICAL: SMTP server not configured. Email features will fail.")
    if smtp.get('password') == 'set-in-ae-sql-db-cnf-tbl':
        log.error("CRITICAL: SMTP password is still set to placeholder. Email authentication will fail.")

    # 3. Security Check
    jwt_key = getattr(settings, 'JWT_KEY', '')
    if not jwt_key or jwt_key == 'fake-super-secret-token':
        log.error("SECURITY: JWT_KEY is missing or using a known fake token!")

    log.info("Configuration validation complete.")

def bootstrap_db_config(settings: Any) -> bool:
    """
    Loads dynamic settings from the 'cfg' table and updates the settings object.
    Uses deferred import of sql_select to avoid circular dependencies.
    """
    # CRITICAL: Deferred import to prevent boot-time circular dependencies
    from app.db_sql import sql_select 
    
    cfg_id = settings.AETHER_CFG.get('id', '0')
    log.info(f"Bootstrapping system configuration from DB (cfg_id={cfg_id})...")
    
    try:
        # Fetch the config record
        aether_cfg_sql = sql_select(
            table_name='cfg',
            record_id=int(cfg_id),
            as_list=False,
            max_count=1,
        )
        
        # In some cases sql_select might return a single-item list even with as_list=False
        if isinstance(aether_cfg_sql, list):
            if len(aether_cfg_sql) > 0:
                aether_cfg_sql = aether_cfg_sql[0]
            else:
                aether_cfg_sql = None

        if not aether_cfg_sql or not isinstance(aether_cfg_sql, dict):
            log.error(f"FAILED to load system config from DB for ID {cfg_id}. Table 'cfg' might be empty or ID missing.")
            return False

        # --- Update Database settings ---
        # Safety: Only update if the values are provided in the DB record
        if aether_cfg_sql.get('db_server'): settings.DB_SERVER = aether_cfg_sql.get('db_server')
        if aether_cfg_sql.get('db_port'): settings.DB_PORT = str(aether_cfg_sql.get('db_port'))
        if aether_cfg_sql.get('db_name'): settings.DB_NAME = aether_cfg_sql.get('db_name')
        if aether_cfg_sql.get('db_username'): settings.DB_USER = aether_cfg_sql.get('db_username')
        if aether_cfg_sql.get('db_password'): settings.DB_PASS = aether_cfg_sql.get('db_password')
        
        # --- Update SMTP Settings ---
        if aether_cfg_sql.get('smtp_server'): settings.SMTP['server'] = aether_cfg_sql.get('smtp_server')
        if aether_cfg_sql.get('smtp_port'): settings.SMTP['port'] = str(aether_cfg_sql.get('smtp_port'))
        if aether_cfg_sql.get('smtp_username'): settings.SMTP['username'] = aether_cfg_sql.get('smtp_username')
        if aether_cfg_sql.get('smtp_password'): settings.SMTP['password'] = aether_cfg_sql.get('smtp_password')

        # --- Update File Paths ---
        if aether_cfg_sql.get('path_hosted_files_root'): settings.FILES_PATH['hosted_files_root'] = aether_cfg_sql.get('path_hosted_files_root')
        if aether_cfg_sql.get('path_hosted_tmp_root'): settings.FILES_PATH['hosted_tmp_root'] = aether_cfg_sql.get('path_hosted_tmp_root')
        
        log.info("System configuration successfully synchronized with DB.")
        return True

    except Exception as e:
        log.exception(f"Unexpected error during system bootstrap: {e}")
        return False