"""SaaS multi-tenancy models: User, Organization, OrganizationMember, StatusPage."""

import uuid
from datetime import datetime

from sqlalchemy import Boolean, DateTime, ForeignKey, String, UniqueConstraint
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.database import Base


def _uuid_str() -> str:
    return str(uuid.uuid4())


class User(Base):
    """Individual who can log in."""

    __tablename__ = "users"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid_str)
    email: Mapped[str] = mapped_column(
        String(255), unique=True, nullable=False, index=True
    )
    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
    display_name: Mapped[str | None] = mapped_column(String(100), nullable=True)
    is_email_verified: Mapped[bool] = mapped_column(Boolean, default=False)
    email_verify_token: Mapped[str | None] = mapped_column(String(100), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow
    )

    memberships: Mapped[list["OrganizationMember"]] = relationship(
        back_populates="user"
    )


class Organization(Base):
    """The tenant; owns status pages."""

    __tablename__ = "organizations"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid_str)
    slug: Mapped[str] = mapped_column(
        String(50), unique=True, nullable=False, index=True
    )
    name: Mapped[str] = mapped_column(String(100), nullable=False)
    tier: Mapped[str] = mapped_column(String(20), nullable=False, default="free")
    # "free" | "pro" | "team"
    stripe_customer_id: Mapped[str | None] = mapped_column(String(100), nullable=True)
    custom_domain: Mapped[str | None] = mapped_column(String(255), nullable=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow
    )
    members: Mapped[list["OrganizationMember"]] = relationship(
        back_populates="organization"
    )
    status_pages: Mapped[list["StatusPage"]] = relationship(
        back_populates="organization"
    )
    # Services linked to this org (from app.models.models.Service)


class OrganizationMember(Base):
    """Joins users to orgs with roles."""

    __tablename__ = "organization_members"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid_str)
    organization_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("organizations.id"), nullable=False, index=True
    )
    user_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("users.id"), nullable=False, index=True
    )
    role: Mapped[str] = mapped_column(String(20), nullable=False, default="member")
    # "owner" | "admin" | "member"
    joined_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)

    organization: Mapped["Organization"] = relationship(back_populates="members")
    user: Mapped["User"] = relationship(back_populates="memberships")

    __table_args__ = (
        {"sqlite_autoincrement": True},
    )


class StatusPage(Base):
    """Per-organization status page."""

    __tablename__ = "status_pages"

    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=_uuid_str)
    organization_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("organizations.id"), nullable=False, index=True
    )
    slug: Mapped[str] = mapped_column(String(50), nullable=False, index=True)
    title: Mapped[str] = mapped_column(String(100), nullable=False)
    subdomain: Mapped[str | None] = mapped_column(String(100), nullable=True)
    custom_domain: Mapped[str | None] = mapped_column(String(255), nullable=True)
    is_public: Mapped[bool] = mapped_column(Boolean, default=True)
    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow)
    updated_at: Mapped[datetime] = mapped_column(
        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow
    )

    organization: Mapped["Organization"] = relationship(back_populates="status_pages")

    __table_args__ = (
        UniqueConstraint("organization_id", "slug", name="uq_status_page_org_slug"),
    )