"""202512151530

Revision ID: 2a46f1e9a590
Revises: 94a98e279951
Create Date: 2025-12-15 15:27:33.975790

"""
from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa
from sqlalchemy import inspect
from sqlalchemy.dialects import postgresql

# revision identifiers, used by Alembic.
revision: str = '2a46f1e9a590'
down_revision: Union[str, None] = '94a98e279951'
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def table_exists(table_name: str) -> bool:
    """检查表是否存在"""
    bind = op.get_bind()
    inspector = inspect(bind)
    return table_name in inspector.get_table_names()


def column_exists(table_name: str, column_name: str) -> bool:
    """检查列是否存在"""
    bind = op.get_bind()
    inspector = inspect(bind)
    if not table_exists(table_name):
        return False
    columns = [col['name'] for col in inspector.get_columns(table_name)]
    return column_name in columns


def index_exists(table_name: str, index_name: str) -> bool:
    """检查索引是否存在"""
    bind = op.get_bind()
    inspector = inspect(bind)
    if not table_exists(table_name):
        return False
    indexes = [idx['name'] for idx in inspector.get_indexes(table_name)]
    return index_name in indexes


def constraint_exists(table_name: str, constraint_name: str) -> bool:
    """检查约束是否存在（外键、唯一约束等）"""
    bind = op.get_bind()
    inspector = inspect(bind)
    if not table_exists(table_name):
        return False
    
    # 检查外键约束
    foreign_keys = [fk['name'] for fk in inspector.get_foreign_keys(table_name) if fk['name']]
    if constraint_name in foreign_keys:
        return True
    
    # 检查唯一约束
    unique_constraints = [uc['name'] for uc in inspector.get_unique_constraints(table_name) if uc['name']]
    if constraint_name in unique_constraints:
        return True
    
    # 检查检查约束
    check_constraints = [cc['name'] for cc in inspector.get_check_constraints(table_name) if cc['name']]
    if constraint_name in check_constraints:
        return True
    
    return False


def trigger_exists(trigger_name: str) -> bool:
    """检查触发器是否存在（PostgreSQL）"""
    bind = op.get_bind()
    result = bind.execute(sa.text(
        "SELECT EXISTS (SELECT 1 FROM pg_trigger WHERE tgname = :trigger_name)"
    ), {"trigger_name": trigger_name})
    return result.scalar()


def sequence_exists(sequence_name: str) -> bool:
    """检查序列是否存在（PostgreSQL）"""
    bind = op.get_bind()
    result = bind.execute(sa.text(
        "SELECT EXISTS (SELECT 1 FROM pg_class WHERE relkind = 'S' AND relname = :sequence_name)"
    ), {"sequence_name": sequence_name})
    return result.scalar()


def enum_exists(enum_name: str) -> bool:
    """检查枚举类型是否存在（PostgreSQL）"""
    bind = op.get_bind()
    result = bind.execute(sa.text(
        "SELECT EXISTS (SELECT 1 FROM pg_type WHERE typname = :enum_name)"
    ), {"enum_name": enum_name})
    return result.scalar()


def upgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('api_keys', schema=None) as batch_op:
        batch_op.add_column(sa.Column('api_key', sa.String(length=255), nullable=False, comment='API Key 明文'))
        batch_op.alter_column('scopes',
               existing_type=postgresql.JSONB(astext_type=sa.Text()),
               nullable=True,
               existing_comment='权限范围列表')
        batch_op.drop_index(batch_op.f('ix_api_keys_key_hash'))
        batch_op.create_index(batch_op.f('ix_api_keys_api_key'), ['api_key'], unique=True)
        batch_op.drop_column('key_hash')
        batch_op.drop_column('resource_type')
        batch_op.drop_column('key_prefix')

    # ### end Alembic commands ###


def downgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    with op.batch_alter_table('api_keys', schema=None) as batch_op:
        batch_op.add_column(sa.Column('key_prefix', sa.VARCHAR(length=20), autoincrement=False, nullable=False, comment='Key 前缀'))
        batch_op.add_column(sa.Column('resource_type', sa.VARCHAR(length=50), autoincrement=False, nullable=True, comment='资源类型'))
        batch_op.add_column(sa.Column('key_hash', sa.VARCHAR(length=255), autoincrement=False, nullable=False, comment='Key 哈希值'))
        batch_op.drop_index(batch_op.f('ix_api_keys_api_key'))
        batch_op.create_index(batch_op.f('ix_api_keys_key_hash'), ['key_hash'], unique=True)
        batch_op.alter_column('scopes',
               existing_type=postgresql.JSONB(astext_type=sa.Text()),
               nullable=False,
               existing_comment='权限范围列表')
        batch_op.drop_column('api_key')

    # ### end Alembic commands ###