"""add_ticket_indexes

Revision ID: b7c8d9e0f1a2
Revises: fix_client_timestamps
Create Date: 2026-03-03 00:00:00.000000

Agrega índices a la tabla tickets para optimizar queries frecuentes:
  - idx_tickets_status            → filtros por estado
  - idx_tickets_priority          → filtros por prioridad
  - idx_tickets_assigned_to       → tickets por agente asignado
  - idx_tickets_tenant_status     → compuesto multi-tenant (tenant_id, status)
"""
from alembic import op

# revision identifiers, used by Alembic.
revision = 'b7c8d9e0f1a2'
down_revision = 'fix_client_timestamps'
branch_labels = None
depends_on = None


def upgrade() -> None:
    op.execute(
        "CREATE INDEX IF NOT EXISTS idx_tickets_status ON tickets (status)"
    )
    op.execute(
        "CREATE INDEX IF NOT EXISTS idx_tickets_priority ON tickets (priority)"
    )
    op.execute(
        "CREATE INDEX IF NOT EXISTS idx_tickets_assigned_to "
        "ON tickets (assigned_to) WHERE assigned_to IS NOT NULL"
    )
    op.execute(
        "CREATE INDEX IF NOT EXISTS idx_tickets_tenant_status "
        "ON tickets (tenant_id, status)"
    )


def downgrade() -> None:
    op.execute("DROP INDEX IF EXISTS idx_tickets_tenant_status")
    op.execute("DROP INDEX IF EXISTS idx_tickets_assigned_to")
    op.execute("DROP INDEX IF EXISTS idx_tickets_priority")
    op.execute("DROP INDEX IF EXISTS idx_tickets_status")