"""Contact and CompanyContact (N:M join) models."""

from __future__ import annotations

import uuid

from sqlalchemy import (
    Boolean,
    ForeignKey,
    Index,
    String,
    Text,
    UniqueConstraint,
)
from sqlalchemy.dialects.postgresql import UUID as PGUUID
from sqlalchemy.orm import Mapped, mapped_column

from app.core.db import Base, TenantMixin


class Contact(Base, TenantMixin):
    """Contact person entity — can be linked to multiple companies via CompanyContact."""

    __tablename__ = "contacts"
    __table_args__ = (
        Index("ix_contacts_tenant_deleted", "tenant_id", "deleted_at"),
        Index("ix_contacts_tenant_name", "tenant_id", "last_name", "first_name"),
        Index("ix_contacts_email", "email"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    first_name: Mapped[str] = mapped_column(String(100), nullable=False)
    last_name: Mapped[str] = mapped_column(String(100), nullable=False)
    email: Mapped[str | None] = mapped_column(String(255), nullable=True)
    phone: Mapped[str | None] = mapped_column(String(30), nullable=True)
    mobile: Mapped[str | None] = mapped_column(String(30), nullable=True)
    position: Mapped[str | None] = mapped_column(String(100), nullable=True)
    department: Mapped[str | None] = mapped_column(String(100), nullable=True)
    linkedin_url: Mapped[str | None] = mapped_column(String(500), nullable=True)
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
    created_by: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )
    updated_by: Mapped[uuid.UUID | None] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )


class CompanyContact(Base, TenantMixin):
    """N:M join table between Company and Contact."""

    __tablename__ = "company_contacts"
    __table_args__ = (
        UniqueConstraint("company_id", "contact_id", "tenant_id", name="uq_company_contact_tenant"),
        Index("ix_cc_company", "company_id"),
        Index("ix_cc_contact", "contact_id"),
    )

    id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), primary_key=True, default=uuid.uuid4
    )
    company_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("companies.id", ondelete="CASCADE"), nullable=False
    )
    contact_id: Mapped[uuid.UUID] = mapped_column(
        PGUUID(as_uuid=True), ForeignKey("contacts.id", ondelete="CASCADE"), nullable=False
    )
    role_at_company: Mapped[str | None] = mapped_column(String(100), nullable=True)
    is_primary: Mapped[bool] = mapped_column(Boolean, nullable=False, default=False)