"""add series table（补漏：线上表已存在，此前无迁移，新环境部署会缺表）

Revision ID: e7a1f3c58d02
Revises: c8f2a15e93b7
Create Date: 2026-10-18 21:00:00.000000
"""
from alembic import op
import sqlalchemy as sa
from sqlalchemy.dialects import mysql

revision = 'e7a1f3c58d02'
down_revision = 'c8f2a15e93b7'
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        'series',
        sa.Column('id', mysql.BIGINT(unsigned=True), autoincrement=True, nullable=False),
        sa.Column('title', sa.String(length=100), nullable=False, comment='系列标题'),
        sa.Column('cover_url', sa.String(length=500), nullable=False, server_default='', comment='封面'),
        sa.Column('description', sa.String(length=500), nullable=False, server_default='', comment='简介'),
        sa.Column('author_id', mysql.BIGINT(unsigned=True), nullable=True, comment='作者'),
        sa.Column('category_id', sa.Integer(), nullable=False, server_default='0'),
        sa.Column('total_episodes', sa.Integer(), nullable=False, server_default='0'),
        sa.Column('view_count', mysql.BIGINT(), nullable=False, server_default='0'),
        sa.Column('status', mysql.TINYINT(), nullable=False, server_default='1', comment='1正常 0下架'),
        sa.Column('created_at', sa.DateTime(), nullable=False, server_default=sa.func.current_timestamp()),
        sa.Column('updated_at', sa.DateTime(), nullable=False,
                  server_default=sa.func.current_timestamp(),
                  onupdate=sa.func.current_timestamp()),
        sa.PrimaryKeyConstraint('id'),
    )
    op.create_index('idx_cat_status', 'series', ['category_id', 'status'])
    op.create_index('idx_status_created', 'series', ['status', 'created_at'])


def downgrade() -> None:
    op.drop_index('idx_status_created', table_name='series')
    op.drop_index('idx_cat_status', table_name='series')
    op.drop_table('series')