"""Create content documents, versions, artifacts and chunks."""

from __future__ import annotations

import sqlalchemy as sa
from alembic import op

revision = "0009_content_publication"
down_revision = "0008_jobs"
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.execute(sa.text("CREATE SCHEMA IF NOT EXISTS content"))
    op.create_table(
        "documents",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("workspace_id", sa.Uuid(), nullable=False),
        sa.Column("source_key", sa.String(256), nullable=False),
        sa.Column("external_id", sa.String(512), nullable=False),
        sa.Column("title", sa.String(512), nullable=False),
        sa.Column(
            "source_deleted", sa.Boolean(), nullable=False, server_default=sa.false()
        ),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
        sa.UniqueConstraint(
            "workspace_id",
            "source_key",
            "external_id",
            name="uq_content_document_source",
        ),
        schema="content",
    )
    op.create_index(
        "ix_content_documents_searchable",
        "documents",
        ["workspace_id", "source_deleted"],
        schema="content",
    )
    op.create_table(
        "document_versions",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("document_id", sa.Uuid(), nullable=False),
        sa.Column("source_fingerprint", sa.String(64), nullable=False),
        sa.Column("content_hash", sa.String(64), nullable=False),
        sa.Column("parser_version", sa.String(128), nullable=False),
        sa.Column("chunk_profile_version", sa.String(128), nullable=False),
        sa.Column("state", sa.String(32), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        sa.Column("updated_at", sa.DateTime(timezone=True), nullable=False),
        sa.ForeignKeyConstraint(
            ["document_id"], ["content.documents.id"], ondelete="CASCADE"
        ),
        sa.UniqueConstraint(
            "document_id",
            "source_fingerprint",
            "content_hash",
            "parser_version",
            "chunk_profile_version",
            name="uq_content_version_identity",
        ),
        schema="content",
    )
    op.create_index(
        "uq_content_one_published_version",
        "document_versions",
        ["document_id"],
        unique=True,
        schema="content",
        postgresql_where=sa.text("state = 'published'"),
    )
    op.create_index(
        "ix_content_versions_document_state",
        "document_versions",
        ["document_id", "state"],
        schema="content",
    )
    op.create_table(
        "artifacts",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("document_version_id", sa.Uuid(), nullable=False),
        sa.Column("kind", sa.String(64), nullable=False),
        sa.Column("content_hash", sa.String(64), nullable=False),
        sa.Column("storage_key", sa.String(512), nullable=False),
        sa.Column("size_bytes", sa.Integer(), nullable=False),
        sa.Column("metadata", sa.JSON(), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), nullable=False),
        sa.ForeignKeyConstraint(
            ["document_version_id"],
            ["content.document_versions.id"],
            ondelete="CASCADE",
        ),
        sa.UniqueConstraint(
            "document_version_id", "kind", name="uq_content_artifact_kind"
        ),
        schema="content",
    )
    op.create_table(
        "chunks",
        sa.Column("id", sa.Uuid(), primary_key=True),
        sa.Column("document_version_id", sa.Uuid(), nullable=False),
        sa.Column("parent_id", sa.Uuid(), nullable=True),
        sa.Column("structure_path", sa.String(512), nullable=False),
        sa.Column("content_hash", sa.String(64), nullable=False),
        sa.Column("chunk_profile_version", sa.String(128), nullable=False),
        sa.Column("content", sa.Text(), nullable=False),
        sa.Column("token_count", sa.Integer(), nullable=False),
        sa.Column("metadata", sa.JSON(), nullable=False),
        sa.ForeignKeyConstraint(
            ["document_version_id"],
            ["content.document_versions.id"],
            ondelete="CASCADE",
        ),
        sa.ForeignKeyConstraint(
            ["parent_id"], ["content.chunks.id"], ondelete="RESTRICT"
        ),
        sa.UniqueConstraint(
            "document_version_id",
            "structure_path",
            "content_hash",
            "chunk_profile_version",
            name="uq_content_chunk_identity",
        ),
        schema="content",
    )
    op.create_index(
        "ix_content_chunks_version_profile",
        "chunks",
        ["document_version_id", "chunk_profile_version"],
        schema="content",
    )


def downgrade() -> None:
    op.drop_index(
        "ix_content_chunks_version_profile", table_name="chunks", schema="content"
    )
    op.drop_table("chunks", schema="content")
    op.drop_table("artifacts", schema="content")
    op.drop_index(
        "ix_content_versions_document_state",
        table_name="document_versions",
        schema="content",
    )
    op.drop_index(
        "uq_content_one_published_version",
        table_name="document_versions",
        schema="content",
    )
    op.drop_table("document_versions", schema="content")
    op.drop_index(
        "ix_content_documents_searchable", table_name="documents", schema="content"
    )
    op.drop_table("documents", schema="content")
    op.execute(sa.text("DROP SCHEMA IF EXISTS content"))