"""Initial

Revision ID: dae12d7f4ddf
Revises:
Create Date: 2025-10-28 22:06:45.637836+00:00

"""

from typing import Sequence, Union

from alembic import op
import sqlalchemy as sa


# revision identifiers, used by Alembic.
revision: str = "dae12d7f4ddf"
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(
        "devices",
        sa.Column("id", sa.Text(), nullable=False),
        sa.Column("name", sa.Text(), nullable=False),
        sa.Column("location", sa.Text(), nullable=True),
        sa.Column("is_active", sa.Boolean(), nullable=True),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_table(
        "telemetry",
        sa.Column("time", sa.DateTime(timezone=True), nullable=False),
        sa.Column("device_id", sa.Text(), nullable=False),
        sa.Column("metric", sa.Text(), nullable=False),
        sa.Column("value", sa.Float(), nullable=False),
        sa.Column("unit", sa.Text(), nullable=True),
        sa.ForeignKeyConstraint(
            ["device_id"],
            ["devices.id"],
        ),
        sa.PrimaryKeyConstraint("time", "device_id", "metric"),
    )
    op.create_index(
        "idx_telemetry_device_time", "telemetry", ["device_id", "time"], unique=False
    )

    # Convert telemetry table to TimescaleDB hypertable
    op.execute("SELECT create_hypertable('telemetry', 'time', if_not_exists => TRUE);")
    # ### end Alembic commands ###


def downgrade() -> None:
    """Downgrade schema."""
    # ### commands auto generated by Alembic - please adjust! ###

    # Note: TimescaleDB hypertables cannot be easily converted back to regular tables
    # The table will be dropped entirely, which removes the hypertable as well
    op.drop_index("idx_telemetry_device_time", table_name="telemetry")
    op.drop_table("telemetry")
    op.drop_table("devices")
    # ### end Alembic commands ###