from datetime import date
from sqlalchemy import (
    Column, Integer, String, Float, Date, Boolean,
    ForeignKey, Enum, Text
)
from sqlalchemy.orm import relationship
import enum

from database import Base


class User(Base):
    __tablename__ = "users"

    id = Column(Integer, primary_key=True, index=True)
    username = Column(String(50), unique=True, nullable=False, index=True)
    email = Column(String(200))
    hashed_password = Column(String(200), nullable=False)
    is_admin = Column(Boolean, default=False)
    actif = Column(Boolean, default=True)
    created_at = Column(Date, default=date.today)


class StatutDevis(str, enum.Enum):
    brouillon = "brouillon"
    envoye = "envoye"
    accepte = "accepte"
    refuse = "refuse"


class StatutFacture(str, enum.Enum):
    emise = "emise"
    payee = "payee"
    annulee = "annulee"


class Client(Base):
    __tablename__ = "clients"

    id = Column(Integer, primary_key=True, index=True)
    nom = Column(String(200), nullable=False)
    adresse = Column(String(300), nullable=False)
    code_postal = Column(String(10), nullable=False)
    ville = Column(String(100), nullable=False)
    email = Column(String(200))
    telephone = Column(String(20))
    siret = Column(String(14))
    actif = Column(Boolean, default=True)

    devis = relationship("Devis", back_populates="client")
    factures = relationship("Facture", back_populates="client")


class LigneDevis(Base):
    __tablename__ = "lignes_devis"

    id = Column(Integer, primary_key=True, index=True)
    devis_id = Column(Integer, ForeignKey("devis.id"), nullable=False)
    description = Column(Text, nullable=False)
    quantite = Column(Float, nullable=False, default=1.0)
    prix_unitaire_ht = Column(Float, nullable=False)
    ordre = Column(Integer, default=0)

    devis = relationship("Devis", back_populates="lignes")

    @property
    def total_ht(self):
        return self.quantite * self.prix_unitaire_ht


class Devis(Base):
    __tablename__ = "devis"

    id = Column(Integer, primary_key=True, index=True)
    numero = Column(String(20), unique=True, nullable=False)
    date_emission = Column(Date, nullable=False, default=date.today)
    date_validite = Column(Date, nullable=False)
    client_id = Column(Integer, ForeignKey("clients.id"), nullable=False)
    statut = Column(Enum(StatutDevis), default=StatutDevis.brouillon)
    notes = Column(Text)
    conditions = Column(Text)

    client = relationship("Client", back_populates="devis")
    lignes = relationship("LigneDevis", back_populates="devis",
                          order_by="LigneDevis.ordre", cascade="all, delete-orphan")
    factures = relationship("Facture", back_populates="devis_origine")

    @property
    def total_ht(self):
        return sum(l.total_ht for l in self.lignes)


class LigneFacture(Base):
    __tablename__ = "lignes_factures"

    id = Column(Integer, primary_key=True, index=True)
    facture_id = Column(Integer, ForeignKey("factures.id"), nullable=False)
    description = Column(Text, nullable=False)
    quantite = Column(Float, nullable=False, default=1.0)
    prix_unitaire_ht = Column(Float, nullable=False)
    ordre = Column(Integer, default=0)

    facture = relationship("Facture", back_populates="lignes")

    @property
    def total_ht(self):
        return self.quantite * self.prix_unitaire_ht


class Facture(Base):
    __tablename__ = "factures"

    id = Column(Integer, primary_key=True, index=True)
    numero = Column(String(20), unique=True, nullable=False)
    date_emission = Column(Date, nullable=False, default=date.today)
    date_echeance = Column(Date, nullable=False)
    client_id = Column(Integer, ForeignKey("clients.id"), nullable=False)
    devis_id = Column(Integer, ForeignKey("devis.id"), nullable=True)
    statut = Column(Enum(StatutFacture), default=StatutFacture.emise)
    notes = Column(Text)
    conditions_reglement = Column(Text, default="Paiement à réception de facture.")
    date_paiement = Column(Date, nullable=True)

    client = relationship("Client", back_populates="factures")
    devis_origine = relationship("Devis", back_populates="factures")
    lignes = relationship("LigneFacture", back_populates="facture",
                          order_by="LigneFacture.ordre", cascade="all, delete-orphan")

    @property
    def total_ht(self):
        return sum(l.total_ht for l in self.lignes)