"""Contact model for companies and persons."""

import uuid
from datetime import datetime

from sqlalchemy import String, DateTime, ForeignKey, func, Table, Column
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db.base import Base

# Many-to-many association table: contacts ↔ tags
contact_tags = Table(
    "contact_tags",
    Base.metadata,
    Column(
        "contact_id",
        String(36),
        ForeignKey("contacts.id", ondelete="CASCADE"),
        primary_key=True,
    ),
    Column(
        "tag_id",
        String(36),
        ForeignKey("tags.id", ondelete="CASCADE"),
        primary_key=True,
    ),
)


class Contact(Base):
    """Represents a contact (company or person) within a tenant account."""

    __tablename__ = "contacts"

    id: Mapped[str] = mapped_column(
        String(36), primary_key=True, default=lambda: str(uuid.uuid4())
    )
    account_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("accounts.id", ondelete="CASCADE"), nullable=False
    )
    type: Mapped[str] = mapped_column(
        String(10), nullable=False
    )  # 'company' or 'person'
    company_name: Mapped[str | None] = mapped_column(String(255), nullable=True)
    first_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
    last_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
    email: Mapped[str | None] = mapped_column(String(255), nullable=True)
    phone: Mapped[str | None] = mapped_column(String(50), nullable=True)
    mobile: Mapped[str | None] = mapped_column(String(50), nullable=True)
    website: Mapped[str | None] = mapped_column(String(500), nullable=True)

    # Billing address
    billing_street: Mapped[str | None] = mapped_column(String(255), nullable=True)
    billing_number: Mapped[str | None] = mapped_column(String(20), nullable=True)
    billing_postalcode: Mapped[str | None] = mapped_column(String(20), nullable=True)
    billing_city: Mapped[str | None] = mapped_column(String(100), nullable=True)
    billing_country: Mapped[str | None] = mapped_column(String(100), nullable=True)

    # Shipping address
    shipping_street: Mapped[str | None] = mapped_column(String(255), nullable=True)
    shipping_number: Mapped[str | None] = mapped_column(String(20), nullable=True)
    shipping_postalcode: Mapped[str | None] = mapped_column(String(20), nullable=True)
    shipping_city: Mapped[str | None] = mapped_column(String(100), nullable=True)
    shipping_country: Mapped[str | None] = mapped_column(String(100), nullable=True)

    # Additional fields from design.md
    tax_number: Mapped[str | None] = mapped_column(String(50), nullable=True)
    note: Mapped[str | None] = mapped_column(String, nullable=True)

    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), server_default=func.now(), nullable=False
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True),
        server_default=func.now(),
        onupdate=func.now(),
        nullable=False,
    )

    # Relationships
    account: Mapped["Account"] = relationship("Account", back_populates="contacts")
    tags: Mapped[list["Tag"]] = relationship(
        "Tag", secondary=contact_tags, back_populates="contacts"
    )
    # projects_as_customer relationship will be added in Phase 3 when Project model is created