"""oauth_credentials and channels

Revision ID: 0002_oauth_channels
Revises: 0001_app_settings
Create Date: 2026-09-16

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa

revision: str = "0002_oauth_channels"
down_revision: Union[str, None] = "0001_app_settings"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "oauth_credentials",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("google_email", sa.String(length=255), nullable=False),
        sa.Column("encrypted_refresh_token", sa.String(), nullable=False),
        sa.Column("access_token_expires_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
    )

    op.create_table(
        "channels",
        sa.Column("id", sa.Integer(), primary_key=True, autoincrement=True),
        sa.Column("youtube_channel_id", sa.String(length=64), nullable=False),
        sa.Column("title", sa.String(length=255), nullable=False),
        sa.Column("description", sa.Text(), nullable=True),
        sa.Column("thumbnail_url", sa.String(), nullable=True),
        sa.Column("uploads_playlist_id", sa.String(length=64), nullable=True),
        sa.Column("subscribed", sa.Boolean(), nullable=False, server_default=sa.true()),
        sa.Column("last_synced_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.Column("updated_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.UniqueConstraint("youtube_channel_id", name="uq_channels_youtube_channel_id"),
    )
    op.create_index("ix_channels_youtube_channel_id", "channels", ["youtube_channel_id"])


def downgrade() -> None:
    op.drop_index("ix_channels_youtube_channel_id", table_name="channels")
    op.drop_table("channels")
    op.drop_table("oauth_credentials")