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#    Licensed under the Apache License, Version 2.0 (the "License"); you may
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"""refactor_credentials

Revision ID: 92aaaa2a6bb3
Revises: 4ef544102ba7
Create Date: 2017-02-01 12:52:43.499663

"""

from alembic import op
import sqlalchemy as sa

from rally import exceptions
from rally.common.db import sa_types


# revision identifiers, used by Alembic.
revision = "92aaaa2a6bb3"
down_revision = "4ef544102ba7"
branch_labels = None
depends_on = None


deployments_helper = sa.Table(
    "deployments",
    sa.MetaData(),
    sa.Column("name", sa.String(255), unique=True),
    sa.Column("id", sa.Integer, primary_key=True, autoincrement=True),
    sa.Column("credentials", sa.PickleType, nullable=True),
    sa.Column(
        "new_credentials",
        sa_types.MutableJSONEncodedDict,
        default={},
        nullable=False,
    ),
)


def upgrade() -> None:
    with op.batch_alter_table("deployments") as batch_op:
        batch_op.add_column(
            sa.Column(
                "new_credentials", sa_types.MutableJSONEncodedDict, default={}
            )
        )

    connection = op.get_bind()
    for deployment in connection.execute(deployments_helper.select()):
        creds: dict[str, list] = {}
        for cred_type, cred_obj in deployment.credentials:
            creds.setdefault(cred_type, [])
            creds[cred_type].append(cred_obj)

        connection.execute(
            deployments_helper.update()
            .where(deployments_helper.c.id == deployment.id)
            .values(new_credentials=creds)
        )

    with op.batch_alter_table("deployments") as batch_op:
        batch_op.drop_column("credentials")
        batch_op.alter_column(
            "new_credentials",
            new_column_name="credentials",
            existing_type=sa_types.MutableJSONEncodedDict,
            nullable=False,
        )


def downgrade() -> None:
    raise exceptions.DowngradeNotSupported()
