"""
C-Stone Invoice Check — Datenbankmodelle
SQLAlchemy ORM Modelle für Rechnungen und Emails
"""

from datetime import datetime
from sqlalchemy import Column, Integer, String, DateTime, Float, Boolean, Text, JSON
from sqlalchemy.ext.declarative import declarative_base

Base = declarative_base()


class Invoice(Base):
    """
    Tabelle: Rechnungen
    Speichert die Metadaten jeder verarbeiteten Rechnung
    """
    __tablename__ = "invoices"

    id = Column(Integer, primary_key=True, index=True)
    email_id = Column(String, index=True)  # IMAP UID der Original-Email
    email_subject = Column(String, nullable=True)
    email_from = Column(String, nullable=True)
    email_date = Column(DateTime, nullable=True)

    # Rechnungsdaten
    invoice_number = Column(String, index=True, nullable=True)
    invoice_date = Column(DateTime, nullable=True)
    invoice_amount = Column(Float, nullable=True)
    invoice_tax_amount = Column(Float, nullable=True)
    invoice_tax_rate = Column(Float, nullable=True)  # z.B. 0, 0.19, 0.16
    invoice_tax_type = Column(String, nullable=True)  # "MwSt", "Umsatzsteuer", "VAT", "ohne"

    # Absender/Empfänger
    issuer_name = Column(String, nullable=True)
    issuer_address = Column(Text, nullable=True)

    # Dateipfad (Evo-X2)
    file_path = Column(String, nullable=True)
    file_name = Column(String, nullable=True)
    storage_year = Column(Integer, nullable=True)
    storage_path = Column(String, nullable=True)  # z.B. "2025/ohne MwSt"

    # Verarbeitungsstatus
    processed = Column(Boolean, default=False)
    processing_error = Column(Text, nullable=True)
    confidence_score = Column(Float, nullable=True)  # 0.0 - 1.0

    created_at = Column(DateTime, default=datetime.utcnow)
    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)

    def __repr__(self):
        return f"<Invoice {self.invoice_number or 'unknown'}>"


class EmailLog(Base):
    """
    Tabelle: Email Logs
    Protokolliert jede verarbeitete Email
    """
    __tablename__ = "email_logs"

    id = Column(Integer, primary_key=True, index=True)
    email_id = Column(String, unique=True, index=True)  # IMAP UID
    email_subject = Column(String, nullable=True)
    email_from = Column(String, nullable=True)
    email_date = Column(DateTime, nullable=True)
    email_folder = Column(String, nullable=True)  # z.B. "INBOX", "Gesendet"

    # Filterergebnis
    matched_keywords = Column(JSON, nullable=True)  # Liste von Stichworten
    has_attachment = Column(Boolean, default=False)
    attachment_type = Column(String, nullable=True)  # "pdf", "doc", "docx", "unknown"

    # Verarbeitung
    processed = Column(Boolean, default=False)
    processing_result = Column(String, nullable=True)  # "invoice_found", "not_an_invoice", "error"
    invoice_id = Column(Integer, nullable=True)  # Verweis auf Invoice-Tabelle

    created_at = Column(DateTime, default=datetime.utcnow)

    def __repr__(self):
        return f"<EmailLog {self.email_id}>"


class InvoiceDetail(Base):
    """
    Tabelle: Rechnungsdetails (erweiterte Informationen)
    Speichert JSON-basierte erweiterte Daten
    """
    __tablename__ = "invoice_details"

    id = Column(Integer, primary_key=True, index=True)
    invoice_id = Column(Integer, nullable=False, index=True)
    raw_text = Column(Text, nullable=True)  # Extrahierter PDF-Text
    parsed_data = Column(JSON, nullable=True)  # Geparste Daten als JSON
    confidence_breakdown = Column(JSON, nullable=True)  # Einzelne Confidence-Scores
    processing_notes = Column(Text, nullable=True)

    created_at = Column(DateTime, default=datetime.utcnow)

    def __repr__(self):
        return f"<InvoiceDetail {self.invoice_id}>"