"""KB evidence model: wider per-field status (OBSERVED/CORROBORATED/EXTERNAL_CORROBORATED/...), promotion audit, provider counters for the panel.

Revision ID: 0030_kb_evidence_model
Revises: 0029_product_enrichment
"""
from alembic import op
import sqlalchemy as sa

revision = "0030_kb_evidence_model"
down_revision = "0029_product_enrichment"
branch_labels = None
depends_on = None


def upgrade():
    op.alter_column("kb_knowledge", "status", existing_type=sa.String(16), type_=sa.String(24), existing_nullable=False, existing_server_default="EVIDENCE_ONLY")
    op.execute("UPDATE kb_knowledge SET status='OBSERVED' WHERE status='EVIDENCE_ONLY'")
    op.alter_column("kb_knowledge", "status", server_default="OBSERVED")
    op.create_table(
        "kb_promotion_audits",
        sa.Column("id", sa.Integer(), primary_key=True),
        sa.Column("kb_product_id", sa.Integer(), sa.ForeignKey("kb_products.id"), nullable=False),
        sa.Column("gtin", sa.String(16), nullable=True),
        sa.Column("field", sa.String(24), nullable=False, server_default="ncm"),
        sa.Column("value", sa.String(64), nullable=True),
        sa.Column("old_status", sa.String(24), nullable=True),
        sa.Column("new_status", sa.String(24), nullable=False),
        sa.Column("families", sa.JSON(), nullable=False),
        sa.Column("sources", sa.JSON(), nullable=False),
        sa.Column("official_dataset", sa.JSON(), nullable=False),
        sa.Column("rule_version", sa.String(32), nullable=False),
        sa.Column("created_at", sa.DateTime(timezone=True), server_default=sa.func.now()),
    )
    op.create_index("ix_kb_promotion_audits_kb_product_id", "kb_promotion_audits", ["kb_product_id"])
    op.create_index("ix_kb_promotion_audits_gtin", "kb_promotion_audits", ["gtin"])
    op.add_column("provider_usage_daily", sa.Column("found", sa.Integer(), nullable=False, server_default="0"))
    op.add_column("provider_usage_daily", sa.Column("ncm_found", sa.Integer(), nullable=False, server_default="0"))
    op.add_column("provider_usage_daily", sa.Column("kb_hits", sa.Integer(), nullable=False, server_default="0"))


def downgrade():
    op.drop_column("provider_usage_daily", "kb_hits")
    op.drop_column("provider_usage_daily", "ncm_found")
    op.drop_column("provider_usage_daily", "found")
    op.drop_table("kb_promotion_audits")
    op.execute("UPDATE kb_knowledge SET status='EVIDENCE_ONLY' WHERE status IN ('OBSERVED','CORROBORATED','EXTERNAL_CORROBORATED')")
    op.alter_column("kb_knowledge", "status", server_default="EVIDENCE_ONLY")
    op.alter_column("kb_knowledge", "status", existing_type=sa.String(24), type_=sa.String(16), existing_nullable=False, existing_server_default="EVIDENCE_ONLY")