"""Phase 12 server AI semantic accounting layer.

Revision ID: 20260822_accounting_ai_p12
Revises: 20260822_bank_client_archive_p11b
"""
from alembic import op
import sqlalchemy as sa


revision = "20260822_accounting_ai_p12"
down_revision = "20260822_bank_client_archive_p11b"
branch_labels = None
depends_on = None


def upgrade():
    op.create_table(
        "accounting_ai_semantic_decisions",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("tenant_id", sa.Integer(), sa.ForeignKey("tenants.id", ondelete="CASCADE"), nullable=False),
        sa.Column("client_id", sa.Integer(), sa.ForeignKey("clients.id", ondelete="CASCADE"), nullable=False),
        sa.Column("source_type", sa.String(30), nullable=False),
        sa.Column("source_record_id", sa.Integer(), nullable=False),
        sa.Column("source_fingerprint", sa.String(80), nullable=False, server_default=""),
        sa.Column("provider_name", sa.String(60), nullable=False, server_default=""),
        sa.Column("model_name", sa.String(120), nullable=False, server_default=""),
        sa.Column("prompt_version", sa.String(40), nullable=False, server_default="phase12-v1"),
        sa.Column("deterministic_nature_id", sa.Integer(), sa.ForeignKey("accounting_natures.id", ondelete="SET NULL"), nullable=True),
        sa.Column("deterministic_confidence", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("ai_nature_id", sa.Integer(), sa.ForeignKey("accounting_natures.id", ondelete="SET NULL"), nullable=True),
        sa.Column("ai_nature_code", sa.String(80), nullable=False, server_default=""),
        sa.Column("ai_confidence", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("combined_confidence", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("capital_revenue", sa.String(20), nullable=False, server_default=""),
        sa.Column("business_personal", sa.String(20), nullable=False, server_default="business"),
        sa.Column("concise_reason", sa.Text(), nullable=False, server_default=""),
        sa.Column("alternatives_json", sa.Text(), nullable=True),
        sa.Column("review_flags_json", sa.Text(), nullable=True),
        sa.Column("context_json", sa.Text(), nullable=True),
        sa.Column("raw_response_json", sa.Text(), nullable=True),
        sa.Column("applied_to_source", sa.Boolean(), nullable=False, server_default=sa.false()),
        sa.Column("skipped_reason", sa.Text(), nullable=True),
        sa.Column("status", sa.String(30), nullable=False, server_default="completed"),
        sa.Column("error_message", sa.Text(), nullable=True),
        sa.Column("final_nature_id", sa.Integer(), sa.ForeignKey("accounting_natures.id", ondelete="SET NULL"), nullable=True),
        sa.Column("final_ledger_name", sa.String(255), nullable=False, server_default=""),
        sa.Column("suggestion_accepted", sa.Boolean(), nullable=True),
        sa.Column("reviewed_by_user_id", sa.Integer(), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
        sa.Column("reviewed_at_utc", sa.DateTime(timezone=True), nullable=True),
        sa.Column("input_tokens", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("output_tokens", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("latency_ms", sa.Integer(), nullable=False, server_default="0"),
        sa.Column("created_by_user_id", sa.Integer(), sa.ForeignKey("users.id", ondelete="SET NULL"), nullable=True),
        sa.Column("created_at_utc", sa.DateTime(timezone=True), nullable=False, server_default=sa.func.now()),
    )

    for name in (
        "tenant_id", "client_id", "source_type", "source_record_id", "source_fingerprint",
        "deterministic_nature_id", "ai_nature_id", "applied_to_source", "status",
        "final_nature_id", "suggestion_accepted", "created_at_utc",
    ):
        op.create_index(
            f"ix_accounting_ai_semantic_decisions_{name}",
            "accounting_ai_semantic_decisions",
            [name],
        )


def downgrade():
    op.drop_table("accounting_ai_semantic_decisions")