"""Initial stable-identity schema: assets and asset_paths.

Revision ID: 0001_initial_identity
Revises:
Create Date: 2026-07-15
"""

import sqlalchemy as sa
from alembic import op

revision = "0001_initial_identity"
down_revision = None
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.create_table(
        "assets",
        sa.Column("id", sa.String(), primary_key=True),
        sa.Column("original_path", sa.String(), nullable=False),
        sa.Column("current_path", sa.String(), nullable=True, unique=True),
        sa.Column("current_sha256", sa.String(), nullable=True),
        sa.Column("pixel_sha256", sa.String(), nullable=True),
        sa.Column("phash", sa.String(), nullable=True),
        sa.Column("hash_version", sa.Integer(), nullable=False, server_default="1"),
        sa.Column("byte_size", sa.Integer(), nullable=True),
        sa.Column("discovered_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("missing_at", sa.DateTime(timezone=True), nullable=True),
        sa.Column(
            "availability_state", sa.String(), nullable=False, server_default="active"
        ),
        sa.Column("state_version", sa.Integer(), nullable=False, server_default="1"),
        sa.Column(
            "created_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("CURRENT_TIMESTAMP"),
        ),
        sa.Column(
            "updated_at",
            sa.DateTime(timezone=True),
            nullable=False,
            server_default=sa.text("CURRENT_TIMESTAMP"),
        ),
    )
    op.create_index("ix_assets_current_sha256", "assets", ["current_sha256"])
    op.create_index("ix_assets_pixel_sha256", "assets", ["pixel_sha256"])
    op.create_index("ix_assets_phash", "assets", ["phash"])
    op.create_index("ix_assets_availability_state", "assets", ["availability_state"])

    op.create_table(
        "asset_paths",
        sa.Column(
            "asset_id",
            sa.String(),
            sa.ForeignKey("assets.id"),
            primary_key=True,
        ),
        sa.Column("path", sa.String(), primary_key=True),
        sa.Column("valid_from", sa.DateTime(timezone=True), primary_key=True),
        sa.Column("valid_until", sa.DateTime(timezone=True), nullable=True),
        sa.Column("reason", sa.String(), nullable=True),
    )
    op.create_index("ix_asset_paths_path", "asset_paths", ["path"])


def downgrade() -> None:
    op.drop_table("asset_paths")
    op.drop_table("assets")