from __future__ import annotations

from datetime import datetime, timezone
from uuid import uuid4

from sqlalchemy import (
    JSON,
    BigInteger,
    DateTime,
    ForeignKey,
    Index,
    Integer,
    String,
    Text,
    UniqueConstraint,
)
from sqlalchemy.orm import DeclarativeBase, Mapped, mapped_column


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


def new_id() -> str:
    return str(uuid4())


class SocialBase(DeclarativeBase):
    """Separate metadata keeps production schema changes migration-only."""


class SocialAccount(SocialBase):
    __tablename__ = "social_accounts"
    __table_args__ = (
        UniqueConstraint(
            "workspace_id",
            "provider",
            "external_account_id",
            name="uq_social_account_workspace_provider_external",
        ),
        Index("ix_social_accounts_workspace_id", "workspace_id"),
        Index("ix_social_accounts_provider_status", "provider", "status"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    provider: Mapped[str] = mapped_column(String(32), nullable=False)
    account_type: Mapped[str] = mapped_column(String(64), nullable=False)
    external_account_id: Mapped[str] = mapped_column(String(255), nullable=False)
    username: Mapped[str | None] = mapped_column(String(255))
    display_name: Mapped[str | None] = mapped_column(String(255))
    avatar_url: Mapped[str | None] = mapped_column(String(2048))
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="pending")
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )
    last_synced_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))


class SocialAccountToken(SocialBase):
    __tablename__ = "social_account_tokens"
    __table_args__ = (
        UniqueConstraint("social_account_id", name="uq_social_account_token"),
        Index("ix_social_account_tokens_expires_at", "expires_at"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    social_account_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_accounts.id", ondelete="CASCADE"), nullable=False
    )
    access_token_secret_id: Mapped[str | None] = mapped_column(String(255))
    refresh_token_secret_id: Mapped[str | None] = mapped_column(String(255))
    encrypted_payload: Mapped[str | None] = mapped_column(Text)
    expires_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    scopes: Mapped[list[str]] = mapped_column(JSON, nullable=False, default=list)
    token_type: Mapped[str | None] = mapped_column(String(64))
    last_refreshed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    revoked_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )


class SocialAccountCapability(SocialBase):
    __tablename__ = "social_account_capabilities"
    __table_args__ = (
        UniqueConstraint("social_account_id", "capability", name="uq_social_account_capability"),
        Index("ix_social_account_capabilities_account", "social_account_id"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    social_account_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_accounts.id", ondelete="CASCADE"), nullable=False
    )
    capability: Mapped[str] = mapped_column(String(100), nullable=False)
    enabled: Mapped[bool] = mapped_column(nullable=False, default=False)
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )


class MediaVariant(SocialBase):
    __tablename__ = "media_variants"
    __table_args__ = (
        Index("ix_media_variants_workspace_source", "workspace_id", "source_asset_id"),
        Index("ix_media_variants_platform", "platform"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    source_asset_id: Mapped[str] = mapped_column(String(255), nullable=False)
    asset_reference: Mapped[str | None] = mapped_column(String(2048))
    template_id: Mapped[str | None] = mapped_column(String(255))
    platform: Mapped[str | None] = mapped_column(String(32))
    width: Mapped[int | None] = mapped_column(Integer)
    height: Mapped[int | None] = mapped_column(Integer)
    duration_seconds: Mapped[float | None] = mapped_column()
    codec: Mapped[str | None] = mapped_column(String(64))
    container: Mapped[str | None] = mapped_column(String(64))
    bitrate: Mapped[int | None] = mapped_column(BigInteger)
    file_size: Mapped[int | None] = mapped_column(BigInteger)
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )


class SocialMediaAsset(SocialBase):
    """A workspace-owned reference to an output published by MediaRouter.

    The media processor remains the source of truth for files.  This table
    only records a tenant binding and immutable download locator so social
    workers can validate and stream the exact output without trusting a
    caller-supplied filesystem path or URL.
    """

    __tablename__ = "social_media_assets"
    __table_args__ = (
        UniqueConstraint(
            "workspace_id", "request_id", "filename", name="uq_social_media_asset_workspace_output"
        ),
        Index("ix_social_media_assets_workspace_id", "workspace_id"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    # Canonical ownership lives in the security/asset domain.  This local
    # social binding is cacheable publishing metadata, not ownership proof.
    canonical_asset_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
    request_id: Mapped[str] = mapped_column(String(36), nullable=False)
    filename: Mapped[str] = mapped_column(String(255), nullable=False)
    mime_type: Mapped[str] = mapped_column(String(255), nullable=False)
    file_size: Mapped[int] = mapped_column(BigInteger, nullable=False)
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )


class SocialCampaign(SocialBase):
    __tablename__ = "social_campaigns"
    __table_args__ = (Index("ix_social_campaigns_workspace_id", "workspace_id"),)
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    name: Mapped[str] = mapped_column(String(255), nullable=False)
    description: Mapped[str | None] = mapped_column(Text)
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="draft")
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )


class SocialPost(SocialBase):
    __tablename__ = "social_posts"
    __table_args__ = (
        UniqueConstraint(
            "workspace_id", "idempotency_key", name="uq_social_posts_workspace_idempotency"
        ),
        Index("ix_social_posts_workspace_created", "workspace_id", "created_at"),
        Index("ix_social_posts_status", "status"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    project_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
    campaign_id: Mapped[str | None] = mapped_column(
        String(36), ForeignKey("social_campaigns.id", ondelete="SET NULL")
    )
    media_asset_id: Mapped[str | None] = mapped_column(String(255), nullable=True)
    canonical_caption: Mapped[str | None] = mapped_column(Text)
    canonical_hashtags: Mapped[list[str]] = mapped_column(JSON, nullable=False, default=list)
    brand_kit_version_id: Mapped[str | None] = mapped_column(String(36), nullable=True)
    source_variant_id: Mapped[str | None] = mapped_column(
        String(36), ForeignKey("media_variants.id", ondelete="SET NULL")
    )
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="draft")
    publish_mode: Mapped[str] = mapped_column(String(32), nullable=False, default="draft")
    idempotency_key: Mapped[str | None] = mapped_column(String(255))
    request_fingerprint: Mapped[str | None] = mapped_column(String(64))
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_by: Mapped[str | None] = mapped_column(String(120))
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )
    published_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    revision: Mapped[int] = mapped_column(Integer, nullable=False, default=1)


class SocialPostTarget(SocialBase):
    __tablename__ = "social_post_targets"
    __table_args__ = (
        UniqueConstraint("social_post_id", "social_account_id", name="uq_social_post_target"),
        Index("ix_social_post_targets_post", "social_post_id"),
        Index("ix_social_post_targets_account", "social_account_id"),
        Index("ix_social_post_targets_status", "status"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    social_post_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_posts.id", ondelete="CASCADE"), nullable=False
    )
    social_account_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_accounts.id", ondelete="RESTRICT"), nullable=False
    )
    provider: Mapped[str] = mapped_column(String(32), nullable=False)
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="draft")
    caption_json: Mapped[dict[str, object]] = mapped_column(
        "caption", JSON, nullable=False, default=dict
    )
    platform_metadata: Mapped[dict[str, object]] = mapped_column(JSON, nullable=False, default=dict)
    external_post_id: Mapped[str | None] = mapped_column(String(255))
    external_url: Mapped[str | None] = mapped_column(String(2048))
    error_code: Mapped[str | None] = mapped_column(String(100))
    error_message: Mapped[str | None] = mapped_column(Text)
    published_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    cancellation_requested_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )


class SocialPostMedia(SocialBase):
    __tablename__ = "social_post_media"
    __table_args__ = (Index("ix_social_post_media_post", "social_post_id"),)
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    social_post_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_posts.id", ondelete="CASCADE"), nullable=False
    )
    media_variant_id: Mapped[str | None] = mapped_column(
        String(36), ForeignKey("media_variants.id", ondelete="SET NULL")
    )
    media_asset_id: Mapped[str | None] = mapped_column(String(255))
    position: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    kind: Mapped[str] = mapped_column(String(32), nullable=False, default="video")
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )


class SocialSchedule(SocialBase):
    __tablename__ = "social_schedules"
    __table_args__ = (
        UniqueConstraint("social_post_id", name="uq_social_schedule_post"),
        Index("ix_social_schedules_due", "status", "scheduled_at"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    social_post_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_posts.id", ondelete="CASCADE"), nullable=False
    )
    scheduled_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    timezone: Mapped[str] = mapped_column(String(100), nullable=False)
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="scheduled")
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )
    revision: Mapped[int] = mapped_column(Integer, nullable=False, default=1)


class SocialJob(SocialBase):
    __tablename__ = "social_jobs"
    __table_args__ = (
        UniqueConstraint(
            "workspace_id", "idempotency_key", name="uq_social_jobs_workspace_idempotency"
        ),
        Index("ix_social_jobs_workspace_status", "workspace_id", "status"),
        Index("ix_social_jobs_next_attempt", "status", "next_attempt_at"),
        Index("ix_social_jobs_post", "social_post_id"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    social_post_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_posts.id", ondelete="CASCADE"), nullable=False
    )
    social_post_target_id: Mapped[str | None] = mapped_column(
        String(36), ForeignKey("social_post_targets.id", ondelete="CASCADE")
    )
    provider: Mapped[str | None] = mapped_column(String(32))
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="queued")
    attempt_count: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
    max_attempts: Mapped[int] = mapped_column(Integer, nullable=False, default=5)
    next_attempt_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    idempotency_key: Mapped[str | None] = mapped_column(String(255))
    error_code: Mapped[str | None] = mapped_column(String(100))
    error_message: Mapped[str | None] = mapped_column(Text)
    payload_json: Mapped[dict[str, object]] = mapped_column(
        "payload", JSON, nullable=False, default=dict
    )
    # Provider resumable-session URLs are bearer-like credentials. They must
    # survive a worker restart but must never be present in job REST/MCP/SDK
    # payloads, so they are encrypted separately from payload JSON.
    provider_state_encrypted: Mapped[str | None] = mapped_column(Text)
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    cancellation_requested_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )


class SocialJobAttempt(SocialBase):
    __tablename__ = "social_job_attempts"
    __table_args__ = (
        UniqueConstraint("social_job_id", "attempt_number", name="uq_social_job_attempt_number"),
        Index("ix_social_job_attempts_job", "social_job_id", "attempt_number"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    social_job_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_jobs.id", ondelete="CASCADE"), nullable=False
    )
    attempt_number: Mapped[int] = mapped_column(Integer, nullable=False)
    status: Mapped[str] = mapped_column(String(32), nullable=False)
    error_code: Mapped[str | None] = mapped_column(String(100))
    error_message: Mapped[str | None] = mapped_column(Text)
    provider_request_id: Mapped[str | None] = mapped_column(String(255))
    started_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))


class OAuthState(SocialBase):
    __tablename__ = "oauth_states"
    __table_args__ = (
        Index("ix_oauth_states_state", "state", unique=True),
        Index("ix_oauth_states_expires_at", "expires_at"),
        Index("ix_oauth_states_workspace", "workspace_id"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    state: Mapped[str] = mapped_column(String(255), nullable=False)
    provider: Mapped[str] = mapped_column(String(32), nullable=False)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    user_id: Mapped[str | None] = mapped_column(String(120))
    redirect_uri: Mapped[str] = mapped_column(String(2048), nullable=False)
    requested_account_type: Mapped[str | None] = mapped_column(String(64))
    requested_scopes: Mapped[list[str]] = mapped_column(JSON, nullable=False, default=list)
    code_verifier_encrypted: Mapped[str | None] = mapped_column(Text)
    expires_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False)
    used_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )


class SocialWebhookEvent(SocialBase):
    __tablename__ = "social_webhook_events"
    __table_args__ = (
        UniqueConstraint(
            "provider", "external_event_id", name="uq_social_webhook_provider_external"
        ),
        Index("ix_social_webhook_events_status", "status"),
        Index("ix_social_webhook_events_received", "received_at"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    provider: Mapped[str] = mapped_column(String(32), nullable=False)
    event_type: Mapped[str] = mapped_column(String(100), nullable=False)
    external_event_id: Mapped[str] = mapped_column(String(255), nullable=False)
    workspace_id: Mapped[str | None] = mapped_column(String(120))
    payload_json: Mapped[dict[str, object]] = mapped_column(
        "payload", JSON, nullable=False, default=dict
    )
    received_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    processed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="received")
    error_message: Mapped[str | None] = mapped_column(Text)


class SocialPostMetric(SocialBase):
    __tablename__ = "social_post_metrics"
    __table_args__ = (
        Index("ix_social_post_metrics_target_retrieved", "social_post_target_id", "retrieved_at"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    social_post_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_posts.id", ondelete="CASCADE"), nullable=False
    )
    social_post_target_id: Mapped[str | None] = mapped_column(
        String(36), ForeignKey("social_post_targets.id", ondelete="CASCADE")
    )
    provider: Mapped[str] = mapped_column(String(32), nullable=False)
    views: Mapped[int | None] = mapped_column(BigInteger)
    impressions: Mapped[int | None] = mapped_column(BigInteger)
    likes: Mapped[int | None] = mapped_column(BigInteger)
    comments: Mapped[int | None] = mapped_column(BigInteger)
    shares: Mapped[int | None] = mapped_column(BigInteger)
    engagement_rate: Mapped[float | None] = mapped_column()
    published_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    retrieved_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    raw_metrics: Mapped[dict[str, object]] = mapped_column(JSON, nullable=False, default=dict)


class SocialAuditEvent(SocialBase):
    __tablename__ = "social_audit_events"
    __table_args__ = (
        Index("ix_social_audit_events_workspace_created", "workspace_id", "created_at"),
        Index("ix_social_audit_events_type", "event_type"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    api_key_id: Mapped[str | None] = mapped_column(String(36))
    event_type: Mapped[str] = mapped_column(String(100), nullable=False)
    provider: Mapped[str | None] = mapped_column(String(32))
    social_account_id: Mapped[str | None] = mapped_column(String(36))
    social_post_id: Mapped[str | None] = mapped_column(String(36))
    social_job_id: Mapped[str | None] = mapped_column(String(36))
    request_id: Mapped[str | None] = mapped_column(String(64))
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )


class SocialPublishingBatch(SocialBase):
    __tablename__ = "social_publishing_batches"
    __table_args__ = (
        UniqueConstraint(
            "workspace_id", "idempotency_key", name="uq_social_publishing_batch_idempotency"
        ),
        Index("ix_social_publishing_batches_workspace_status", "workspace_id", "status"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    workspace_id: Mapped[str] = mapped_column(String(120), nullable=False)
    operation: Mapped[str] = mapped_column(String(32), nullable=False)
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="queued")
    idempotency_key: Mapped[str] = mapped_column(String(255), nullable=False)
    requested_by: Mapped[str | None] = mapped_column(String(120))
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    started_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))
    completed_at: Mapped[datetime | None] = mapped_column(DateTime(timezone=True))


class SocialPublishingBatchItem(SocialBase):
    __tablename__ = "social_publishing_batch_items"
    __table_args__ = (
        UniqueConstraint("batch_id", "social_post_id", name="uq_social_publishing_batch_item"),
        Index("ix_social_publishing_batch_items_status", "status"),
    )
    id: Mapped[str] = mapped_column(String(36), primary_key=True, default=new_id)
    batch_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_publishing_batches.id", ondelete="CASCADE"), nullable=False
    )
    social_post_id: Mapped[str] = mapped_column(
        String(36), ForeignKey("social_posts.id", ondelete="CASCADE"), nullable=False
    )
    status: Mapped[str] = mapped_column(String(32), nullable=False, default="queued")
    error_code: Mapped[str | None] = mapped_column(String(100))
    error_message: Mapped[str | None] = mapped_column(Text)
    metadata_json: Mapped[dict[str, object]] = mapped_column(
        "metadata", JSON, nullable=False, default=dict
    )
    created_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow
    )
    updated_at: Mapped[datetime] = mapped_column(
        DateTime(timezone=True), nullable=False, default=utcnow, onupdate=utcnow
    )