"""add world_rooms, world_chunks, world_chunk_revisions tables

Revision ID: 0005_add_world_content_tables
Revises: 0004_add_avatar_loadouts_table
Create Date: 2026-09-14 00:00:00.000000

See docs/architecture/world_persistence_impl.md §4. Chunk content
(rooms, chunk payloads, chunk revisions) lives in Postgres, purely
additive to the existing ``worlds`` table.
"""
from typing import Sequence, Union

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

# revision identifiers, used by Alembic.
revision: str = "0005_add_world_content_tables"
down_revision: Union[str, None] = "0004_add_avatar_loadouts_table"
branch_labels: Union[str, Sequence[str], None] = None
depends_on: Union[str, Sequence[str], None] = None


def upgrade() -> None:
    op.create_table(
        "world_rooms",
        sa.Column("id", sa.Integer(), primary_key=True, index=True),
        sa.Column(
            "world_id", sa.Integer(),
            sa.ForeignKey("worlds.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("slug", sa.String(64), nullable=False),
        sa.Column("name", sa.String(255), nullable=False),
        sa.Column(
            "grid", postgresql.JSONB(), nullable=False,
            server_default='{"size": [32, 32, 1], "origin": [0, 0, 0]}',
        ),
        sa.Column("bounds", postgresql.JSONB(), nullable=True),
        sa.Column("spawn", postgresql.JSONB(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.Column(
            "updated_at", sa.DateTime(timezone=True),
            server_default=sa.func.now(), nullable=False,
        ),
        sa.UniqueConstraint("world_id", "slug", name="uq_world_rooms_world_slug"),
    )
    op.create_index("ix_world_rooms_world_id", "world_rooms", ["world_id"])

    op.create_table(
        "world_chunks",
        sa.Column("id", sa.Integer(), primary_key=True, index=True),
        sa.Column(
            "world_id", sa.Integer(),
            sa.ForeignKey("worlds.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column(
            "room_id", sa.Integer(),
            sa.ForeignKey("world_rooms.id", ondelete="CASCADE"),
            nullable=False,
        ),
        sa.Column("chunk_key", sa.String(160), nullable=False, unique=True),
        sa.Column("cx", sa.Integer(), nullable=False),
        sa.Column("cy", sa.Integer(), nullable=False),
        sa.Column("cz", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("format_version", sa.Integer(), nullable=False, server_default="1"),
        sa.Column("payload", sa.LargeBinary(), nullable=False),
        sa.Column("payload_len", sa.Integer(), nullable=False),
        sa.Column("checksum", sa.String(64), nullable=False),
        sa.Column("revision", sa.Integer(), nullable=False, server_default="1"),
        sa.Column("content_flags", postgresql.JSONB(), nullable=False, server_default="{}"),
        sa.Column("is_mature", sa.Boolean(), nullable=False, server_default="false"),
        sa.Column(
            "updated_by_id", sa.Integer(),
            sa.ForeignKey("users.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
        sa.Column(
            "updated_at", sa.DateTime(timezone=True),
            server_default=sa.func.now(), nullable=False,
        ),
        sa.UniqueConstraint("room_id", "cx", "cy", "cz", name="uq_world_chunks_coord"),
    )
    op.create_index("ix_world_chunks_world_id", "world_chunks", ["world_id"])
    op.create_index("ix_world_chunks_room_id", "world_chunks", ["room_id"])
    op.create_index(
        "ix_world_chunks_room_coord", "world_chunks", ["room_id", "cx", "cy", "cz"],
    )
    op.create_index(
        "ix_world_chunks_mature", "world_chunks", ["world_id"],
        postgresql_where=sa.text("is_mature"),
    )

    op.create_table(
        "world_chunk_revisions",
        sa.Column("id", sa.Integer(), primary_key=True, index=True),
        sa.Column("chunk_key", sa.String(160), nullable=False),
        sa.Column("world_id", sa.Integer(), nullable=False),
        sa.Column("revision", sa.Integer(), nullable=False),
        sa.Column("action", sa.String(16), nullable=False),
        sa.Column(
            "actor_id", sa.Integer(),
            sa.ForeignKey("users.id", ondelete="SET NULL"),
            nullable=True,
        ),
        sa.Column("checksum", sa.String(64), nullable=False),
        sa.Column("payload", sa.LargeBinary(), nullable=True),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now(), nullable=False),
    )
    op.create_index("ix_world_chunk_revisions_chunk_key", "world_chunk_revisions", ["chunk_key"])
    op.create_index("ix_world_chunk_revisions_world_id", "world_chunk_revisions", ["world_id"])
    op.create_index("ix_world_chunk_revisions_created_at", "world_chunk_revisions", ["created_at"])


def downgrade() -> None:
    op.drop_table("world_chunk_revisions")
    op.drop_table("world_chunks")
    op.drop_table("world_rooms")