"""SQLAlchemy ORM models for all persistent tables.

Only auth, billing, storage metadata, and marketplace data live here.
User content (notes, tasks, etc.) is NEVER persisted server-side —
it lives in E2E-encrypted blobs in S3, referenced by storage_records.

Table inventory:
  users               — account credentials + tier
  refresh_tokens      — hashed refresh token store
  subscriptions       — Stripe subscription records
  storage_records     — S3 blob metadata (no plaintext)
  backup_metadata     — encrypted backup manifests
  plugins             — marketplace plugin catalog
  plugin_installations — per-user install records
  plugin_reviews      — admin review decisions
  revenue_events      — Stripe Connect 70/30 split ledger
"""

from __future__ import annotations

import uuid
from datetime import datetime, timezone

from sqlalchemy import (
    BigInteger,
    Boolean,
    DateTime,
    Enum,
    Float,
    ForeignKey,
    Integer,
    String,
    Text,
    UniqueConstraint,
    Uuid,
    func,
)
from sqlalchemy.orm import Mapped, mapped_column, relationship

from app.db import Base

# ── Helpers ──────────────────────────────────────────────────────────────


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


def _now() -> datetime:
    return datetime.now(timezone.utc)


# ── Enum types ────────────────────────────────────────────────────────────

TierEnum = Enum("free", "pro", "power", "team", name="billing_tier")
PluginStatusEnum = Enum("pending_review", "approved", "rejected", name="plugin_status")
ReviewDecisionEnum = Enum("approved", "rejected", name="review_decision")


# ── Models ────────────────────────────────────────────────────────────────


class User(Base):
    __tablename__ = "users"

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    email: Mapped[str] = mapped_column(String(255), unique=True, nullable=False, index=True)
    password_hash: Mapped[str] = mapped_column(String(255), nullable=False)
    tier: Mapped[str] = mapped_column(TierEnum, nullable=False, default="free")
    stripe_customer_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now()
    )

    refresh_tokens: Mapped[list[RefreshToken]] = relationship(
        back_populates="user", cascade="all, delete-orphan"
    )
    subscription: Mapped[Subscription | None] = relationship(
        back_populates="user", uselist=False, cascade="all, delete-orphan"
    )


class RefreshToken(Base):
    __tablename__ = "refresh_tokens"

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    user_id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    token_hash: Mapped[str] = mapped_column(String(64), unique=True, nullable=False, index=True)
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )

    user: Mapped[User] = relationship(back_populates="refresh_tokens")


class Subscription(Base):
    __tablename__ = "subscriptions"

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    user_id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="CASCADE"),
        nullable=False, unique=True, index=True
    )
    stripe_subscription_id: Mapped[str | None] = mapped_column(String(255), nullable=True, index=True)
    tier: Mapped[str] = mapped_column(TierEnum, nullable=False, default="free")
    status: Mapped[str] = mapped_column(String(50), nullable=False, default="free")
    current_period_end: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )

    user: Mapped[User] = relationship(back_populates="subscription")


class StorageRecord(Base):
    __tablename__ = "storage_records"

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    user_id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    table_name: Mapped[str] = mapped_column(String(100), nullable=False)
    s3_key: Mapped[str] = mapped_column(String(500), nullable=False)
    checksum: Mapped[str] = mapped_column(String(64), nullable=False)
    size_bytes: Mapped[int] = mapped_column(Integer, nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now()
    )


class BackupMetadata(Base):
    __tablename__ = "backup_metadata"

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    user_id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    s3_key: Mapped[str] = mapped_column(String(500), nullable=False)
    version: Mapped[int] = mapped_column(Integer, nullable=False)
    timestamp: Mapped[int] = mapped_column(BigInteger, nullable=False)
    checksum: Mapped[str] = mapped_column(String(64), nullable=False)
    size_bytes: Mapped[int] = mapped_column(Integer, nullable=False)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )


class Plugin(Base):
    __tablename__ = "plugins"

    id: Mapped[str] = mapped_column(String(255), primary_key=True)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str] = mapped_column(Text, nullable=False, default="")
    version: Mapped[str] = mapped_column(String(50), nullable=False, default="1.0.0")
    # nullable until developer account system is built
    author_id: Mapped[str | None] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )
    author_name: Mapped[str] = mapped_column(String(255), nullable=False, default="")
    category: Mapped[str] = mapped_column(String(100), nullable=False, default="")
    price_cents: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    permissions: Mapped[str] = mapped_column(Text, nullable=False, default="[]")  # JSON list
    status: Mapped[str] = mapped_column(PluginStatusEnum, nullable=False, default="pending_review")
    s3_package_key: Mapped[str | None] = mapped_column(String(500), nullable=True)
    install_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    avg_rating: Mapped[float] = mapped_column(Float, nullable=False, default=0.0)
    rejection_reason: Mapped[str | None] = mapped_column(Text, nullable=True)
    submitted_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )

    installations: Mapped[list[PluginInstallation]] = relationship(
        back_populates="plugin", cascade="all, delete-orphan"
    )
    reviews: Mapped[list[PluginReview]] = relationship(
        back_populates="plugin", cascade="all, delete-orphan"
    )
    revenue_events: Mapped[list[RevenueEvent]] = relationship(
        back_populates="plugin", cascade="all, delete-orphan"
    )


class PluginInstallation(Base):
    __tablename__ = "plugin_installations"
    __table_args__ = (UniqueConstraint("plugin_id", "user_id", name="uq_plugin_user"),)

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    plugin_id: Mapped[str] = mapped_column(
        String(255), ForeignKey("plugins.id", ondelete="CASCADE"), nullable=False, index=True
    )
    user_id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    installed_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )

    plugin: Mapped[Plugin] = relationship(back_populates="installations")


class PluginReview(Base):
    __tablename__ = "plugin_reviews"

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    plugin_id: Mapped[str] = mapped_column(
        String(255), ForeignKey("plugins.id", ondelete="CASCADE"), nullable=False, index=True
    )
    reviewer_id: Mapped[str | None] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="SET NULL"), nullable=True
    )
    decision: Mapped[str] = mapped_column(ReviewDecisionEnum, nullable=False)
    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
    reviewed_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )

    plugin: Mapped[Plugin] = relationship(back_populates="reviews")


class RevenueEvent(Base):
    __tablename__ = "revenue_events"

    id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), primary_key=True, default=_uuid
    )
    plugin_id: Mapped[str] = mapped_column(
        String(255), ForeignKey("plugins.id", ondelete="CASCADE"), nullable=False, index=True
    )
    user_id: Mapped[str] = mapped_column(
        Uuid(as_uuid=False), ForeignKey("users.id", ondelete="CASCADE"), nullable=False, index=True
    )
    amount_cents: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    developer_share_cents: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    stripe_transfer_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
    paid_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True), nullable=True)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, server_default=func.now()
    )

    plugin: Mapped[Plugin] = relationship(back_populates="revenue_events")