"""
EspoCRM ↔ Advoware Bankverbindungen Mapper

Transformiert Bankverbindungen zwischen den beiden Systemen
"""

from typing import Dict, Any, Optional, List
from datetime import datetime


class BankverbindungenMapper:
    """Mapper für CBankverbindungen (EspoCRM) ↔ Bankverbindung (Advoware)"""
    
    @staticmethod
    def map_cbankverbindungen_to_advoware(espo_entity: Dict[str, Any]) -> Dict[str, Any]:
        """
        Transformiert EspoCRM CBankverbindungen → Advoware Bankverbindung Format
        
        Args:
            espo_entity: CBankverbindungen Entity von EspoCRM
            
        Returns:
            Dict für Advoware API (POST/PUT /api/v1/advonet/Beteiligte/{id}/Bankverbindungen)
        """
        logger.debug(f"Mapping EspoCRM → Advoware Bankverbindung: {espo_entity.get('id')}")
        
        advo_data = {}
        
        # Bankname
        bank = espo_entity.get('bank')
        if bank:
            advo_data['bank'] = bank
        
        # Kontonummer (deprecated, aber noch supported)
        kto_nr = espo_entity.get('kontoNummer')
        if kto_nr:
            advo_data['ktoNr'] = kto_nr
        
        # BLZ (deprecated, aber noch supported)
        blz = espo_entity.get('blz')
        if blz:
            advo_data['blz'] = blz
        
        # IBAN
        iban = espo_entity.get('iban')
        if iban:
            advo_data['iban'] = iban
        
        # BIC
        bic = espo_entity.get('bic')
        if bic:
            advo_data['bic'] = bic
        
        # Kontoinhaber
        kontoinhaber = espo_entity.get('kontoinhaber')
        if kontoinhaber:
            advo_data['kontoinhaber'] = kontoinhaber
        
        # SEPA Mandat
        mandatsreferenz = espo_entity.get('mandatsreferenz')
        if mandatsreferenz:
            advo_data['mandatsreferenz'] = mandatsreferenz
        
        mandat_vom = espo_entity.get('mandatVom')
        if mandat_vom:
            advo_data['mandatVom'] = mandat_vom
        
        logger.debug(f"Mapped to Advoware: IBAN={advo_data.get('iban')}, Bank={advo_data.get('bank')}")
        
        return advo_data
    
    @staticmethod
    def map_advoware_to_cbankverbindungen(advo_entity: Dict[str, Any]) -> Dict[str, Any]:
        """
        Transformiert Advoware Bankverbindung → EspoCRM CBankverbindungen Format
        
        Args:
            advo_entity: Bankverbindung von Advoware API
            
        Returns:
            Dict für EspoCRM API (POST/PUT /api/v1/CBankverbindungen)
        """
        logger.debug(f"Mapping Advoware → EspoCRM: id={advo_entity.get('id')}")
        
        espo_data = {
            'advowareId': advo_entity.get('id'),  # Link zu Advoware
            'advowareRowId': advo_entity.get('rowId'),  # Änderungserkennung
        }
        
        # Bankname
        bank = advo_entity.get('bank')
        if bank:
            espo_data['bank'] = bank
        
        # Kontonummer
        kto_nr = advo_entity.get('ktoNr')
        if kto_nr:
            espo_data['kontoNummer'] = kto_nr
        
        # BLZ
        blz = advo_entity.get('blz')
        if blz:
            espo_data['blz'] = blz
        
        # IBAN
        iban = advo_entity.get('iban')
        if iban:
            espo_data['iban'] = iban
        
        # BIC
        bic = advo_entity.get('bic')
        if bic:
            espo_data['bic'] = bic
        
        # Kontoinhaber
        kontoinhaber = advo_entity.get('kontoinhaber')
        if kontoinhaber:
            espo_data['kontoinhaber'] = kontoinhaber
        
        # SEPA Mandat
        mandatsreferenz = advo_entity.get('mandatsreferenz')
        if mandatsreferenz:
            espo_data['mandatsreferenz'] = mandatsreferenz
        
        mandat_vom = advo_entity.get('mandatVom')
        if mandat_vom:
            # Konvertiere DateTime zu Date (EspoCRM Format: YYYY-MM-DD)
            espo_data['mandatVom'] = mandat_vom.split('T')[0] if 'T' in mandat_vom else mandat_vom
        
        logger.debug(f"Mapped to EspoCRM: IBAN={espo_data.get('iban')}")
        
        # Entferne None-Werte (EspoCRM Validierung)
        espo_data = {k: v for k, v in espo_data.items() if v is not None}
        
        return espo_data
    
    @staticmethod
    def get_changed_fields(espo_entity: Dict[str, Any], advo_entity: Dict[str, Any]) -> List[str]:
        """
        Vergleicht zwei Entities und gibt Liste der geänderten Felder zurück
        
        Args:
            espo_entity: EspoCRM CBankverbindungen
            advo_entity: Advoware Bankverbindung
            
        Returns:
            Liste von Feldnamen die unterschiedlich sind
        """
        mapped_advo = BankverbindungenMapper.map_advoware_to_cbankverbindungen(advo_entity)
        
        changed = []
        
        compare_fields = [
            'bank', 'iban', 'bic', 'kontoNummer', 'blz',
            'kontoinhaber', 'mandatsreferenz', 'mandatVom',
            'advowareId', 'advowareRowId'
        ]
        
        for field in compare_fields:
            espo_val = espo_entity.get(field)
            advo_val = mapped_advo.get(field)
            
            # Normalisiere None und leere Strings
            espo_val = espo_val if espo_val else None
            advo_val = advo_val if advo_val else None
            
            if espo_val != advo_val:
                changed.append(field)
                logger.debug(f"Field '{field}' changed: EspoCRM='{espo_val}' vs Advoware='{advo_val}'")
        
        return changed