--liquibase formatted sql
-- PANELS · core · RPC presupuesto (capítulos, partidas, importación atómica)

--changeset panel:core-011a-fn-budget-list splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_list(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_chapters jsonb;
  v_items jsonb;
  v_subtotal numeric(14,2);
  v_iva numeric(14,2);
  v_item_count integer;
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_list: project_id es obligatorio para consultar el presupuesto',
      jsonb_build_object('fn', 'fn_budget_list', 'field', 'project_id')
    );
  END IF;
  IF NOT EXISTS (SELECT 1 FROM projects WHERE id = v_project_id) THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_list: proyecto id=%s no encontrado', v_project_id),
      jsonb_build_object('fn', 'fn_budget_list', 'project_id', v_project_id)
    );
  END IF;

  SELECT COALESCE(jsonb_agg(to_jsonb(c) ORDER BY c.sort_order, c.id), '[]'::jsonb)
    INTO v_chapters
    FROM (
      SELECT
        bc.id,
        bc.project_id,
        bc.parent_id,
        bc.code,
        bc.name,
        COALESCE(bc.wbs, '') AS wbs,
        bc.sort_order
      FROM budget_chapters bc
      WHERE bc.project_id = v_project_id
    ) c;

  SELECT
    COALESCE(jsonb_agg(to_jsonb(i) ORDER BY COALESCE(i.ch_sort, 9999), i.sort_order, i.id), '[]'::jsonb),
    COALESCE(SUM(i.amount), 0),
    COUNT(*)::integer
    INTO v_items, v_subtotal, v_item_count
    FROM (
      SELECT
        bi.*,
        ch.name AS chapter_name,
        ch.code AS chapter_code,
        ch.sort_order AS ch_sort
      FROM budget_items bi
      LEFT JOIN budget_chapters ch ON ch.id = bi.chapter_id
      WHERE bi.project_id = v_project_id
    ) i;

  v_subtotal := round(COALESCE(v_subtotal, 0), 2);
  v_iva := round(v_subtotal * 0.16, 2);

  RETURN core.rpc_ok(
    jsonb_build_object(
      'chapters', v_chapters,
      'items', v_items,
      'totals', jsonb_build_object(
        'subtotal', v_subtotal,
        'iva', v_iva,
        'total', round(v_subtotal + v_iva, 2),
        'item_count', v_item_count
      )
    ),
    format('Presupuesto del proyecto %s: %s capítulo(s), %s partida(s), subtotal %s',
      v_project_id, jsonb_array_length(v_chapters), v_item_count, v_subtotal),
    jsonb_build_object(
      'fn', 'fn_budget_list',
      'project_id', v_project_id,
      'chapter_count', jsonb_array_length(v_chapters),
      'item_count', v_item_count
    )
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_list', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011b-fn-budget-chapter-create splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_chapter_create(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_parent_id bigint := NULLIF(payload->>'parent_id', '')::bigint;
  v_name text := nullif(btrim(payload->>'name'), '');
  v_code text := coalesce(nullif(btrim(payload->>'code'), ''), '');
  v_wbs text := coalesce(nullif(btrim(payload->>'wbs'), ''), '');
  v_sort integer;
  v_row budget_chapters%ROWTYPE;
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_chapter_create: project_id es obligatorio',
      jsonb_build_object('fn', 'fn_budget_chapter_create', 'field', 'project_id')
    );
  END IF;
  IF v_name IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_chapter_create: nombre de capítulo obligatorio',
      jsonb_build_object('fn', 'fn_budget_chapter_create', 'field', 'name', 'project_id', v_project_id)
    );
  END IF;
  IF NOT EXISTS (SELECT 1 FROM projects WHERE id = v_project_id) THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_chapter_create: proyecto id=%s no encontrado', v_project_id),
      jsonb_build_object('fn', 'fn_budget_chapter_create', 'project_id', v_project_id)
    );
  END IF;
  IF v_parent_id IS NOT NULL AND NOT EXISTS (
    SELECT 1 FROM budget_chapters WHERE id = v_parent_id AND project_id = v_project_id
  ) THEN
    RETURN core.rpc_err(
      'VALIDATION',
      format('fn_budget_chapter_create: capítulo padre id=%s no pertenece al proyecto %s', v_parent_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_chapter_create', 'project_id', v_project_id, 'parent_id', v_parent_id)
    );
  END IF;

  SELECT COALESCE(MAX(sort_order), 0) + 1
    INTO v_sort
    FROM budget_chapters
   WHERE project_id = v_project_id;

  INSERT INTO budget_chapters (project_id, parent_id, code, name, wbs, sort_order)
  VALUES (v_project_id, v_parent_id, v_code, v_name, v_wbs, v_sort)
  RETURNING * INTO v_row;

  RETURN core.rpc_created(
    jsonb_build_object('chapter', to_jsonb(v_row)),
    format('Capítulo "%s" creado en proyecto %s (id=%s)', v_row.name, v_project_id, v_row.id),
    jsonb_build_object('fn', 'fn_budget_chapter_create', 'project_id', v_project_id, 'id', v_row.id)
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_chapter_create', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011c-fn-budget-chapter-update splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_chapter_update(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_id bigint := NULLIF(payload->>'id', '')::bigint;
  v_cur budget_chapters%ROWTYPE;
  v_name text;
  v_code text;
  v_wbs text;
  v_parent_id bigint;
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_chapter_update: project_id es obligatorio',
      jsonb_build_object('fn', 'fn_budget_chapter_update', 'field', 'project_id')
    );
  END IF;
  IF v_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_chapter_update: id del capítulo es obligatorio',
      jsonb_build_object('fn', 'fn_budget_chapter_update', 'field', 'id', 'project_id', v_project_id)
    );
  END IF;

  SELECT * INTO v_cur FROM budget_chapters WHERE id = v_id AND project_id = v_project_id;
  IF NOT FOUND THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_chapter_update: capítulo id=%s no encontrado en proyecto %s', v_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_chapter_update', 'project_id', v_project_id, 'id', v_id)
    );
  END IF;

  v_name := coalesce(nullif(btrim(payload->>'name'), ''), v_cur.name);
  v_code := CASE WHEN payload ? 'code' THEN coalesce(nullif(btrim(payload->>'code'), ''), '') ELSE v_cur.code END;
  v_wbs := CASE WHEN payload ? 'wbs' THEN coalesce(nullif(btrim(payload->>'wbs'), ''), '') ELSE v_cur.wbs END;
  v_parent_id := CASE
    WHEN payload ? 'parent_id' THEN NULLIF(payload->>'parent_id', '')::bigint
    ELSE v_cur.parent_id
  END;

  IF v_parent_id IS NOT NULL AND v_parent_id = v_id THEN
    RETURN core.rpc_err(
      'VALIDATION',
      format('fn_budget_chapter_update: un capítulo no puede ser padre de sí mismo (id=%s)', v_id),
      jsonb_build_object('fn', 'fn_budget_chapter_update', 'project_id', v_project_id, 'id', v_id)
    );
  END IF;
  IF v_parent_id IS NOT NULL AND NOT EXISTS (
    SELECT 1 FROM budget_chapters WHERE id = v_parent_id AND project_id = v_project_id
  ) THEN
    RETURN core.rpc_err(
      'VALIDATION',
      format('fn_budget_chapter_update: capítulo padre id=%s no pertenece al proyecto %s', v_parent_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_chapter_update', 'project_id', v_project_id, 'parent_id', v_parent_id)
    );
  END IF;

  UPDATE budget_chapters
     SET name = v_name,
         code = v_code,
         wbs = v_wbs,
         parent_id = v_parent_id
   WHERE id = v_id;

  RETURN core.rpc_ok(
    jsonb_build_object('id', v_id, 'name', v_name, 'code', v_code),
    format('Capítulo id=%s actualizado en proyecto %s', v_id, v_project_id),
    jsonb_build_object('fn', 'fn_budget_chapter_update', 'project_id', v_project_id, 'id', v_id)
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_chapter_update', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011d-fn-budget-chapter-delete splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_chapter_delete(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_id bigint := NULLIF(payload->>'id', '')::bigint;
  v_name text;
  v_orphans integer;
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_chapter_delete: project_id es obligatorio',
      jsonb_build_object('fn', 'fn_budget_chapter_delete', 'field', 'project_id')
    );
  END IF;
  IF v_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_chapter_delete: id del capítulo es obligatorio',
      jsonb_build_object('fn', 'fn_budget_chapter_delete', 'field', 'id', 'project_id', v_project_id)
    );
  END IF;

  SELECT name INTO v_name FROM budget_chapters WHERE id = v_id AND project_id = v_project_id;
  IF NOT FOUND THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_chapter_delete: capítulo id=%s no encontrado en proyecto %s', v_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_chapter_delete', 'project_id', v_project_id, 'id', v_id)
    );
  END IF;

  UPDATE budget_items
     SET chapter_id = NULL
   WHERE project_id = v_project_id
     AND chapter_id = v_id;
  GET DIAGNOSTICS v_orphans = ROW_COUNT;

  DELETE FROM budget_chapters WHERE id = v_id AND project_id = v_project_id;

  RETURN core.rpc_ok(
    jsonb_build_object('id', v_id, 'orphaned_items', v_orphans),
    format('Capítulo "%s" (id=%s) eliminado del proyecto %s; %s partida(s) quedaron sin capítulo',
      v_name, v_id, v_project_id, v_orphans),
    jsonb_build_object('fn', 'fn_budget_chapter_delete', 'project_id', v_project_id, 'id', v_id)
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_chapter_delete', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011e-fn-budget-item-create splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_item_create(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_chapter_id bigint := NULLIF(payload->>'chapter_id', '')::bigint;
  v_description text := nullif(btrim(payload->>'description'), '');
  v_code text := upper(coalesce(nullif(btrim(payload->>'code'), ''), ''));
  v_unit text := upper(coalesce(nullif(btrim(payload->>'unit'), ''), ''));
  v_qty numeric(14,4) := coalesce((payload->>'quantity')::numeric(14,4), 0);
  v_price numeric(14,4) := coalesce((payload->>'unit_price')::numeric(14,4), 0);
  v_wbs text := coalesce(nullif(btrim(payload->>'wbs'), ''), '');
  v_amount numeric(14,2);
  v_sort integer;
  v_row budget_items%ROWTYPE;
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_item_create: project_id es obligatorio',
      jsonb_build_object('fn', 'fn_budget_item_create', 'field', 'project_id')
    );
  END IF;
  IF v_description IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_item_create: descripción de partida obligatoria',
      jsonb_build_object('fn', 'fn_budget_item_create', 'field', 'description', 'project_id', v_project_id)
    );
  END IF;
  IF NOT EXISTS (SELECT 1 FROM projects WHERE id = v_project_id) THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_item_create: proyecto id=%s no encontrado', v_project_id),
      jsonb_build_object('fn', 'fn_budget_item_create', 'project_id', v_project_id)
    );
  END IF;
  IF v_chapter_id IS NOT NULL AND NOT EXISTS (
    SELECT 1 FROM budget_chapters WHERE id = v_chapter_id AND project_id = v_project_id
  ) THEN
    RETURN core.rpc_err(
      'VALIDATION',
      format('fn_budget_item_create: capítulo id=%s no pertenece al proyecto %s', v_chapter_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_item_create', 'project_id', v_project_id, 'chapter_id', v_chapter_id)
    );
  END IF;

  v_amount := round(v_qty * v_price, 2);
  SELECT COALESCE(MAX(sort_order), 0) + 1
    INTO v_sort
    FROM budget_items
   WHERE project_id = v_project_id;

  INSERT INTO budget_items (
    project_id, chapter_id, code, description, unit, quantity, unit_price, amount, wbs, sort_order
  ) VALUES (
    v_project_id, v_chapter_id, v_code, v_description, v_unit, v_qty, v_price, v_amount, v_wbs, v_sort
  )
  RETURNING * INTO v_row;

  RETURN core.rpc_created(
    jsonb_build_object('item', to_jsonb(v_row)),
    format('Partida "%s" creada en proyecto %s (id=%s, importe=%s)',
      v_row.description, v_project_id, v_row.id, v_row.amount),
    jsonb_build_object('fn', 'fn_budget_item_create', 'project_id', v_project_id, 'id', v_row.id)
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_item_create', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011f-fn-budget-item-update splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_item_update(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_id bigint := NULLIF(payload->>'id', '')::bigint;
  v_cur budget_items%ROWTYPE;
  v_chapter_id bigint;
  v_description text;
  v_code text;
  v_unit text;
  v_qty numeric(14,4);
  v_price numeric(14,4);
  v_wbs text;
  v_amount numeric(14,2);
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_item_update: project_id es obligatorio',
      jsonb_build_object('fn', 'fn_budget_item_update', 'field', 'project_id')
    );
  END IF;
  IF v_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_item_update: id de partida es obligatorio',
      jsonb_build_object('fn', 'fn_budget_item_update', 'field', 'id', 'project_id', v_project_id)
    );
  END IF;

  SELECT * INTO v_cur FROM budget_items WHERE id = v_id AND project_id = v_project_id;
  IF NOT FOUND THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_item_update: partida id=%s no encontrada en proyecto %s', v_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_item_update', 'project_id', v_project_id, 'id', v_id)
    );
  END IF;

  v_chapter_id := CASE
    WHEN payload ? 'chapter_id' THEN NULLIF(payload->>'chapter_id', '')::bigint
    ELSE v_cur.chapter_id
  END;
  v_description := coalesce(nullif(btrim(payload->>'description'), ''), v_cur.description);
  v_code := upper(CASE WHEN payload ? 'code' THEN coalesce(nullif(btrim(payload->>'code'), ''), '') ELSE v_cur.code END);
  v_unit := upper(CASE WHEN payload ? 'unit' THEN coalesce(nullif(btrim(payload->>'unit'), ''), '') ELSE v_cur.unit END);
  v_qty := CASE WHEN payload ? 'quantity' THEN coalesce((payload->>'quantity')::numeric(14,4), 0) ELSE v_cur.quantity END;
  v_price := CASE WHEN payload ? 'unit_price' THEN coalesce((payload->>'unit_price')::numeric(14,4), 0) ELSE v_cur.unit_price END;
  v_wbs := CASE WHEN payload ? 'wbs' THEN coalesce(nullif(btrim(payload->>'wbs'), ''), '') ELSE v_cur.wbs END;

  IF v_chapter_id IS NOT NULL AND NOT EXISTS (
    SELECT 1 FROM budget_chapters WHERE id = v_chapter_id AND project_id = v_project_id
  ) THEN
    RETURN core.rpc_err(
      'VALIDATION',
      format('fn_budget_item_update: capítulo id=%s no pertenece al proyecto %s', v_chapter_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_item_update', 'project_id', v_project_id, 'chapter_id', v_chapter_id)
    );
  END IF;

  v_amount := round(v_qty * v_price, 2);

  UPDATE budget_items
     SET chapter_id = v_chapter_id,
         code = v_code,
         description = v_description,
         unit = v_unit,
         quantity = v_qty,
         unit_price = v_price,
         amount = v_amount,
         wbs = v_wbs
   WHERE id = v_id;

  RETURN core.rpc_ok(
    jsonb_build_object('id', v_id, 'amount', v_amount),
    format('Partida id=%s actualizada en proyecto %s (importe=%s)', v_id, v_project_id, v_amount),
    jsonb_build_object('fn', 'fn_budget_item_update', 'project_id', v_project_id, 'id', v_id)
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_item_update', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011g-fn-budget-item-delete splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_item_delete(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_id bigint := NULLIF(payload->>'id', '')::bigint;
  v_description text;
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_item_delete: project_id es obligatorio',
      jsonb_build_object('fn', 'fn_budget_item_delete', 'field', 'project_id')
    );
  END IF;
  IF v_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_item_delete: id de partida es obligatorio',
      jsonb_build_object('fn', 'fn_budget_item_delete', 'field', 'id', 'project_id', v_project_id)
    );
  END IF;

  DELETE FROM budget_items
   WHERE id = v_id
     AND project_id = v_project_id
  RETURNING description INTO v_description;

  IF NOT FOUND THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_item_delete: partida id=%s no encontrada en proyecto %s', v_id, v_project_id),
      jsonb_build_object('fn', 'fn_budget_item_delete', 'project_id', v_project_id, 'id', v_id)
    );
  END IF;

  RETURN core.rpc_ok(
    jsonb_build_object('id', v_id),
    format('Partida "%s" (id=%s) eliminada del proyecto %s', v_description, v_id, v_project_id),
    jsonb_build_object('fn', 'fn_budget_item_delete', 'project_id', v_project_id, 'id', v_id)
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_item_delete', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011h-fn-budget-replace splitStatements:false
CREATE OR REPLACE FUNCTION core.fn_budget_replace(payload jsonb)
RETURNS jsonb
LANGUAGE plpgsql
SECURITY INVOKER
SET search_path = core
AS $$
DECLARE
  v_project_id bigint := NULLIF(payload->>'project_id', '')::bigint;
  v_chapters jsonb := COALESCE(payload->'chapters', '[]'::jsonb);
  v_items jsonb := COALESCE(payload->'items', '[]'::jsonb);
  v_ch jsonb;
  v_it jsonb;
  v_wbs text;
  v_parent_wbs text;
  v_chapter_wbs text;
  v_parent_id bigint;
  v_chapter_id bigint;
  v_new_id bigint;
  v_sort integer;
  v_item_sort integer;
  v_qty numeric(14,4);
  v_price numeric(14,4);
  v_amount numeric(14,2);
  v_chapter_count integer := 0;
  v_item_count integer := 0;
  v_wbs_map jsonb := '{}'::jsonb;
BEGIN
  IF v_project_id IS NULL THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_replace: project_id es obligatorio para reemplazar el presupuesto',
      jsonb_build_object('fn', 'fn_budget_replace', 'field', 'project_id')
    );
  END IF;
  IF jsonb_typeof(v_chapters) <> 'array' THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_replace: chapters debe ser un arreglo JSON',
      jsonb_build_object('fn', 'fn_budget_replace', 'field', 'chapters', 'project_id', v_project_id)
    );
  END IF;
  IF jsonb_typeof(v_items) <> 'array' THEN
    RETURN core.rpc_err(
      'VALIDATION',
      'fn_budget_replace: items debe ser un arreglo JSON',
      jsonb_build_object('fn', 'fn_budget_replace', 'field', 'items', 'project_id', v_project_id)
    );
  END IF;
  IF NOT EXISTS (SELECT 1 FROM projects WHERE id = v_project_id) THEN
    RETURN core.rpc_err(
      'NOT_FOUND',
      format('fn_budget_replace: proyecto id=%s no encontrado', v_project_id),
      jsonb_build_object('fn', 'fn_budget_replace', 'project_id', v_project_id)
    );
  END IF;

  DELETE FROM budget_items WHERE project_id = v_project_id;
  DELETE FROM budget_chapters WHERE project_id = v_project_id;

  v_sort := 0;
  FOR v_ch IN
    SELECT elem
      FROM jsonb_array_elements(v_chapters) AS elem
     ORDER BY coalesce(nullif(btrim(elem->>'wbs'), ''), elem->>'sort_order', elem->>'name')
  LOOP
    v_sort := v_sort + 1;
    v_wbs := coalesce(nullif(btrim(v_ch->>'wbs'), ''), v_sort::text);
    v_parent_wbs := nullif(btrim(v_ch->>'parent_wbs'), '');
    v_parent_id := NULL;
    IF v_parent_wbs IS NOT NULL THEN
      v_parent_id := NULLIF(v_wbs_map->>v_parent_wbs, '')::bigint;
      IF v_parent_id IS NULL THEN
        RETURN core.rpc_err(
          'VALIDATION',
          format('fn_budget_replace: parent_wbs=%s no encontrado al insertar capítulo wbs=%s', v_parent_wbs, v_wbs),
          jsonb_build_object('fn', 'fn_budget_replace', 'project_id', v_project_id, 'wbs', v_wbs, 'parent_wbs', v_parent_wbs)
        );
      END IF;
    END IF;

    IF nullif(btrim(v_ch->>'name'), '') IS NULL THEN
      RETURN core.rpc_err(
        'VALIDATION',
        format('fn_budget_replace: nombre de capítulo obligatorio (wbs=%s)', v_wbs),
        jsonb_build_object('fn', 'fn_budget_replace', 'project_id', v_project_id, 'wbs', v_wbs)
      );
    END IF;

    INSERT INTO budget_chapters (project_id, parent_id, code, name, wbs, sort_order)
    VALUES (
      v_project_id,
      v_parent_id,
      coalesce(nullif(btrim(v_ch->>'code'), ''), ''),
      btrim(v_ch->>'name'),
      v_wbs,
      coalesce((v_ch->>'sort_order')::integer, v_sort)
    )
    RETURNING id INTO v_new_id;

    v_wbs_map := v_wbs_map || jsonb_build_object(v_wbs, v_new_id::text);
    v_chapter_count := v_chapter_count + 1;
  END LOOP;

  v_item_sort := 0;
  FOR v_it IN SELECT elem FROM jsonb_array_elements(v_items) AS elem
  LOOP
    v_item_sort := v_item_sort + 1;
    IF nullif(btrim(v_it->>'description'), '') IS NULL THEN
      RETURN core.rpc_err(
        'VALIDATION',
        format('fn_budget_replace: descripción obligatoria en partida #%s', v_item_sort),
        jsonb_build_object('fn', 'fn_budget_replace', 'project_id', v_project_id, 'item_index', v_item_sort)
      );
    END IF;

    v_chapter_wbs := nullif(btrim(v_it->>'chapter_wbs'), '');
    v_chapter_id := NULL;
    IF v_chapter_wbs IS NOT NULL THEN
      v_chapter_id := NULLIF(v_wbs_map->>v_chapter_wbs, '')::bigint;
      IF v_chapter_id IS NULL THEN
        RETURN core.rpc_err(
          'VALIDATION',
          format('fn_budget_replace: chapter_wbs=%s no encontrado para partida #%s', v_chapter_wbs, v_item_sort),
          jsonb_build_object('fn', 'fn_budget_replace', 'project_id', v_project_id, 'chapter_wbs', v_chapter_wbs)
        );
      END IF;
    ELSIF v_it ? 'chapter_id' AND nullif(v_it->>'chapter_id', '') IS NOT NULL THEN
      v_chapter_id := (v_it->>'chapter_id')::bigint;
      IF NOT EXISTS (SELECT 1 FROM budget_chapters WHERE id = v_chapter_id AND project_id = v_project_id) THEN
        RETURN core.rpc_err(
          'VALIDATION',
          format('fn_budget_replace: chapter_id=%s inválido para partida #%s', v_chapter_id, v_item_sort),
          jsonb_build_object('fn', 'fn_budget_replace', 'project_id', v_project_id, 'chapter_id', v_chapter_id)
        );
      END IF;
    END IF;

    v_qty := coalesce((v_it->>'quantity')::numeric(14,4), 0);
    v_price := coalesce((v_it->>'unit_price')::numeric(14,4), 0);
    v_amount := round(coalesce((v_it->>'amount')::numeric(14,2), v_qty * v_price), 2);

    INSERT INTO budget_items (
      project_id, chapter_id, code, description, unit, quantity, unit_price, amount, wbs, sort_order
    ) VALUES (
      v_project_id,
      v_chapter_id,
      upper(coalesce(nullif(btrim(v_it->>'code'), ''), '')),
      btrim(v_it->>'description'),
      upper(coalesce(nullif(btrim(v_it->>'unit'), ''), '')),
      v_qty,
      v_price,
      v_amount,
      coalesce(nullif(btrim(v_it->>'wbs'), ''), ''),
      coalesce((v_it->>'sort_order')::integer, v_item_sort)
    );
    v_item_count := v_item_count + 1;
  END LOOP;

  RETURN core.rpc_ok(
    jsonb_build_object(
      'project_id', v_project_id,
      'chapter_count', v_chapter_count,
      'item_count', v_item_count
    ),
    format('Presupuesto del proyecto %s reemplazado: %s capítulo(s) y %s partida(s) importados',
      v_project_id, v_chapter_count, v_item_count),
    jsonb_build_object(
      'fn', 'fn_budget_replace',
      'project_id', v_project_id,
      'chapter_count', v_chapter_count,
      'item_count', v_item_count
    )
  );
EXCEPTION WHEN OTHERS THEN
  RETURN core.rpc_from_exception('fn_budget_replace', SQLSTATE, SQLERRM);
END;
$$;

--changeset panel:core-011i-fn-budget-grants endDelimiter:; splitStatements:true
GRANT EXECUTE ON FUNCTION core.fn_budget_list(jsonb) TO panels_core_app;
GRANT EXECUTE ON FUNCTION core.fn_budget_chapter_create(jsonb) TO panels_core_app;
GRANT EXECUTE ON FUNCTION core.fn_budget_chapter_update(jsonb) TO panels_core_app;
GRANT EXECUTE ON FUNCTION core.fn_budget_chapter_delete(jsonb) TO panels_core_app;
GRANT EXECUTE ON FUNCTION core.fn_budget_item_create(jsonb) TO panels_core_app;
GRANT EXECUTE ON FUNCTION core.fn_budget_item_update(jsonb) TO panels_core_app;
GRANT EXECUTE ON FUNCTION core.fn_budget_item_delete(jsonb) TO panels_core_app;
GRANT EXECUTE ON FUNCTION core.fn_budget_replace(jsonb) TO panels_core_app;