"""Initial migration: Channel and VideoEntry tables

Revision ID: 270efe6976bc
Revises: 
Create Date: 2025-11-26 13:55:52.270543

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = '270efe6976bc'
down_revision: Union[str, Sequence[str], None] = None
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    """Upgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_table('channels',
    sa.Column('id', sa.Integer(), nullable=False),
    sa.Column('channel_id', sa.String(length=50), nullable=False),
    sa.Column('title', sa.String(length=200), nullable=False),
    sa.Column('link', sa.String(length=500), nullable=False),
    sa.Column('last_fetched', sa.DateTime(), nullable=False),
    sa.PrimaryKeyConstraint('id')
    )
    op.create_index(op.f('ix_channels_channel_id'), 'channels', ['channel_id'], unique=True)
    op.create_table('video_entries',
    sa.Column('id', sa.Integer(), nullable=False),
    sa.Column('channel_id', sa.Integer(), nullable=False),
    sa.Column('title', sa.String(length=500), nullable=False),
    sa.Column('link', sa.String(length=500), nullable=False),
    sa.Column('created_at', sa.DateTime(), nullable=False),
    sa.ForeignKeyConstraint(['channel_id'], ['channels.id'], ),
    sa.PrimaryKeyConstraint('id'),
    sa.UniqueConstraint('link')
    )
    op.create_index('idx_channel_created', 'video_entries', ['channel_id', 'created_at'], unique=False)
    # ### end Alembic commands ###


def downgrade() -> None:
    """Downgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_index('idx_channel_created', table_name='video_entries')
    op.drop_table('video_entries')
    op.drop_index(op.f('ix_channels_channel_id'), table_name='channels')
    op.drop_table('channels')
    # ### end Alembic commands ###