--liquibase formatted sql
-- PANELS · core · fn_work_program_vs_cost: warehouse_movements no tiene project_id

--changeset panel:core-038-fn-work-program-vs-cost splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_work_program_vs_cost(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_program_id bigint;
  v_periods jsonb;
  v_by_period jsonb;
  v_by_chapter jsonb;
  v_budget_total numeric(14,2);
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err('VALIDATION', 'fn_work_program_vs_cost: project_id es obligatorio',
      jsonb_build_object('fn', 'fn_work_program_vs_cost'));
  END IF;

  SELECT id INTO v_program_id FROM work_programs WHERE project_id = v_project_id;
  IF v_program_id IS NULL THEN
    RETURN core.rpc_ok(jsonb_build_object('periods', '[]'::jsonb, 'by_period', '[]'::jsonb, 'by_chapter', '[]'::jsonb),
      format('Proyecto %s sin programa', v_project_id),
      jsonb_build_object('fn', 'fn_work_program_vs_cost', 'project_id', v_project_id));
  END IF;

  SELECT COALESCE(SUM(amount), 0) INTO v_budget_total FROM budget_items WHERE project_id = v_project_id;

  SELECT COALESCE(jsonb_agg(to_jsonb(p) ORDER BY p.period_index), '[]'::jsonb) INTO v_periods
  FROM work_program_periods p WHERE p.program_id = v_program_id;

  SELECT COALESCE(jsonb_agg(to_jsonb(x) ORDER BY x.period_index), '[]'::jsonb) INTO v_by_period
  FROM (
    SELECT
      pr.period_index,
      pr.label,
      pr.start_date,
      pr.end_date,
      round(COALESCE(SUM(pa.amount), 0), 2) AS scheduled_amount,
      round(COALESCE((
        SELECT SUM(e.subtotal)
        FROM expense_entries e
        WHERE e.project_id = v_project_id
          AND e.status = 'confirmed'
          AND e.counts_toward_budget = true
          AND e.expense_date BETWEEN pr.start_date AND pr.end_date
      ), 0) + COALESCE((
        SELECT SUM(m.total_cost)
        FROM warehouse_movements m
        JOIN warehouses w ON w.id = m.warehouse_id
        WHERE w.project_id = v_project_id
          AND m.movement_type = 'exit'
          AND m.movement_date BETWEEN pr.start_date AND pr.end_date
      ), 0), 2) AS executed_amount
    FROM work_program_periods pr
    LEFT JOIN work_program_partida_amounts pa ON pa.period_id = pr.id AND pa.program_id = v_program_id
    WHERE pr.program_id = v_program_id
    GROUP BY pr.id, pr.period_index, pr.label, pr.start_date, pr.end_date
  ) x;

  SELECT COALESCE(jsonb_agg(to_jsonb(y) ORDER BY y.chapter_code), '[]'::jsonb) INTO v_by_chapter
  FROM (
    SELECT
      bc.id AS chapter_id,
      bc.code AS chapter_code,
      bc.name AS chapter_name,
      round(COALESCE((
        SELECT SUM(pa.amount)
        FROM work_program_partida_amounts pa
        WHERE pa.budget_chapter_id = bc.id AND pa.program_id = v_program_id
      ), 0), 2) AS scheduled_amount,
      round(COALESCE((
        SELECT SUM(core._cost_executed_amount(bi.id))
        FROM budget_items bi
        WHERE bi.chapter_id = bc.id
      ), 0), 2) AS executed_amount,
      round(COALESCE((
        SELECT SUM(bi.amount)
        FROM budget_items bi
        WHERE bi.chapter_id = bc.id
      ), 0), 2) AS budget_amount
    FROM budget_chapters bc
    WHERE bc.project_id = v_project_id
  ) y;

  RETURN core.rpc_ok(
    jsonb_build_object(
      'periods', v_periods,
      'budget_subtotal', v_budget_total,
      'by_period', v_by_period,
      'by_chapter', v_by_chapter
    ),
    format('Programado vs ejecutado del proyecto %s', v_project_id),
    jsonb_build_object('fn', 'fn_work_program_vs_cost', 'project_id', v_project_id)
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_work_program_vs_cost', SQLSTATE, SQLERRM);
END;
$$;