"""init knowledge models

Revision ID: 20260425_0001
Revises:
Create Date: 2026-04-25 17:10:00
"""

from collections.abc import Sequence

from alembic import op
import sqlalchemy as sa


revision: str = "20260425_0001"
down_revision: str | None = None
branch_labels: Sequence[str] | None = None
depends_on: Sequence[str] | None = None


def upgrade() -> None:
    op.create_table(
        "knowledge_base",
        sa.Column("code", sa.String(length=64), nullable=False),
        sa.Column("name", sa.String(length=128), nullable=False),
        sa.Column("description", sa.Text(), nullable=True),
        sa.Column("status", sa.String(length=32), nullable=False),
        sa.Column("metadata_json", sa.JSON(), nullable=True),
        sa.Column("id", sa.String(length=36), nullable=False),
        sa.Column("tenant_id", sa.String(length=36), nullable=False),
        sa.Column("created_by", sa.String(length=36), nullable=True),
        sa.Column("updated_by", sa.String(length=36), nullable=True),
        sa.Column("created_time", sa.DateTime(), nullable=False),
        sa.Column("updated_time", sa.DateTime(), nullable=False),
        sa.Column("deleted_time", sa.DateTime(), nullable=True),
        sa.Column("version", sa.Integer(), nullable=False),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index("ix_knowledge_base_code", "knowledge_base", ["code"], unique=False)
    op.create_index("ix_knowledge_base_status", "knowledge_base", ["status"], unique=False)
    op.create_index("ix_knowledge_base_tenant_id", "knowledge_base", ["tenant_id"], unique=False)

    op.create_table(
        "knowledge_document",
        sa.Column("knowledge_base_id", sa.String(length=36), nullable=False),
        sa.Column("title", sa.String(length=256), nullable=False),
        sa.Column("source_type", sa.String(length=32), nullable=False),
        sa.Column("source_uri", sa.String(length=512), nullable=True),
        sa.Column("status", sa.String(length=32), nullable=False),
        sa.Column("content_text", sa.Text(), nullable=False),
        sa.Column("content_hash", sa.String(length=64), nullable=True),
        sa.Column("metadata_json", sa.JSON(), nullable=True),
        sa.Column("indexed_time", sa.DateTime(), nullable=True),
        sa.Column("id", sa.String(length=36), nullable=False),
        sa.Column("tenant_id", sa.String(length=36), nullable=False),
        sa.Column("created_by", sa.String(length=36), nullable=True),
        sa.Column("updated_by", sa.String(length=36), nullable=True),
        sa.Column("created_time", sa.DateTime(), nullable=False),
        sa.Column("updated_time", sa.DateTime(), nullable=False),
        sa.Column("deleted_time", sa.DateTime(), nullable=True),
        sa.Column("version", sa.Integer(), nullable=False),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index(
        "ix_knowledge_document_knowledge_base_id",
        "knowledge_document",
        ["knowledge_base_id"],
        unique=False,
    )
    op.create_index(
        "ix_knowledge_document_source_type",
        "knowledge_document",
        ["source_type"],
        unique=False,
    )
    op.create_index("ix_knowledge_document_status", "knowledge_document", ["status"], unique=False)
    op.create_index(
        "ix_knowledge_document_content_hash",
        "knowledge_document",
        ["content_hash"],
        unique=False,
    )
    op.create_index(
        "ix_knowledge_document_tenant_id",
        "knowledge_document",
        ["tenant_id"],
        unique=False,
    )

    op.create_table(
        "knowledge_chunk",
        sa.Column("knowledge_base_id", sa.String(length=36), nullable=False),
        sa.Column("document_id", sa.String(length=36), nullable=False),
        sa.Column("chunk_index", sa.Integer(), nullable=False),
        sa.Column("content_text", sa.Text(), nullable=False),
        sa.Column("token_count", sa.Integer(), nullable=False),
        sa.Column("embedding_model", sa.String(length=64), nullable=True),
        sa.Column("embedding_json", sa.JSON(), nullable=True),
        sa.Column("metadata_json", sa.JSON(), nullable=True),
        sa.Column("id", sa.String(length=36), nullable=False),
        sa.Column("tenant_id", sa.String(length=36), nullable=False),
        sa.Column("created_by", sa.String(length=36), nullable=True),
        sa.Column("updated_by", sa.String(length=36), nullable=True),
        sa.Column("created_time", sa.DateTime(), nullable=False),
        sa.Column("updated_time", sa.DateTime(), nullable=False),
        sa.Column("deleted_time", sa.DateTime(), nullable=True),
        sa.Column("version", sa.Integer(), nullable=False),
        sa.PrimaryKeyConstraint("id"),
    )
    op.create_index(
        "ix_knowledge_chunk_knowledge_base_id",
        "knowledge_chunk",
        ["knowledge_base_id"],
        unique=False,
    )
    op.create_index(
        "ix_knowledge_chunk_document_id",
        "knowledge_chunk",
        ["document_id"],
        unique=False,
    )
    op.create_index(
        "ix_knowledge_chunk_embedding_model",
        "knowledge_chunk",
        ["embedding_model"],
        unique=False,
    )
    op.create_index("ix_knowledge_chunk_tenant_id", "knowledge_chunk", ["tenant_id"], unique=False)


def downgrade() -> None:
    op.drop_index("ix_knowledge_chunk_tenant_id", table_name="knowledge_chunk")
    op.drop_index("ix_knowledge_chunk_embedding_model", table_name="knowledge_chunk")
    op.drop_index("ix_knowledge_chunk_document_id", table_name="knowledge_chunk")
    op.drop_index("ix_knowledge_chunk_knowledge_base_id", table_name="knowledge_chunk")
    op.drop_table("knowledge_chunk")

    op.drop_index("ix_knowledge_document_tenant_id", table_name="knowledge_document")
    op.drop_index("ix_knowledge_document_content_hash", table_name="knowledge_document")
    op.drop_index("ix_knowledge_document_status", table_name="knowledge_document")
    op.drop_index("ix_knowledge_document_source_type", table_name="knowledge_document")
    op.drop_index("ix_knowledge_document_knowledge_base_id", table_name="knowledge_document")
    op.drop_table("knowledge_document")

    op.drop_index("ix_knowledge_base_tenant_id", table_name="knowledge_base")
    op.drop_index("ix_knowledge_base_status", table_name="knowledge_base")
    op.drop_index("ix_knowledge_base_code", table_name="knowledge_base")
    op.drop_table("knowledge_base")