-- Kompaktní JSON pro diagnostiku jednoho planning_run (MCP / UI).

create or replace function ems.fn_planning_run_debug(p_run_id int)
returns jsonb
language plpgsql
stable
as $fn$
declare
  r_run ems.planning_run%rowtype;
  v_intervals jsonb;
  v_first_charge timestamptz;
  v_first_bat_export timestamptz;
  v_top_sell jsonb;
begin
  select * into r_run from ems.planning_run where id = p_run_id;
  if not found then
    return null::jsonb;
  end if;

  select coalesce(jsonb_agg(to_jsonb(pi.*) order by pi.interval_start), '[]'::jsonb)
  into v_intervals
  from ems.planning_interval pi
  where pi.run_id = p_run_id;

  select pi.interval_start
  into v_first_charge
  from ems.planning_interval pi
  where pi.run_id = p_run_id
    and coalesce(pi.battery_setpoint_w, 0) > 500
  order by pi.interval_start
  limit 1;

  select pi.interval_start
  into v_first_bat_export
  from ems.planning_interval pi
  where pi.run_id = p_run_id
    and coalesce(pi.battery_setpoint_w, 0) < -500
    and coalesce(pi.grid_setpoint_w, 0) < 0
  order by pi.interval_start
  limit 1;

  select coalesce(
    jsonb_agg(
      jsonb_build_object(
        'interval_start', x.interval_start,
        'effective_sell_price', x.effective_sell_price
      )
      order by x.effective_sell_price desc nulls last
    ),
    '[]'::jsonb
  )
  into v_top_sell
  from (
    select pi.interval_start, pi.effective_sell_price
    from ems.planning_interval pi
    where pi.run_id = p_run_id
    order by pi.effective_sell_price desc nulls last
    limit 3
  ) x;

  return jsonb_build_object(
    'planning_run', to_jsonb(r_run),
    'solver_params', r_run.solver_params,
    'intervals', v_intervals,
    'summary', jsonb_build_object(
      'first_charge_slot', to_jsonb(v_first_charge),
      'first_battery_export_slot', to_jsonb(v_first_bat_export),
      'top_sell_slots', v_top_sell,
      'solver_params_version', r_run.solver_params->'version'
    )
  );
end;
$fn$;

comment on function ems.fn_planning_run_debug(int) is
  'Jeden jsonb: metadata planning_run, solver_params, všechny planning_interval řádky a krátký summary.';