// The grid's plan: the decisions `gridTable` used to make while creating
// elements, where a wrong answer showed up as a wrong pixel.

import { test } from "node:test";
import assert from "node:assert/strict";

import { gridPlan } from "../shell.js";

const cell = (text, extra = {}) => ({
  text,
  numeric: true,
  error: false,
  selected: false,
  editable: true,
  ...extra,
});

/// A grid with a group header between its data rows — the shape the row
/// index has to survive. Two column levels under one group run.
function grouped() {
  return {
    row_levels: 2,
    col_levels: [["Q1", ""], ["Revenue", "Cost"]],
    col_groups: [{ span: 2, label: "2026", collapsed: false }],
    totals: [],
    editing: null,
    rows: [
      { kind: "group", label: "Hot", collapsed: false },
      { kind: "data", labels: ["Hot", "Espresso"], cells: [cell("1"), cell("2")] },
      { kind: "data", labels: ["", "Latte"], cells: [cell("3"), cell("4")] },
      { kind: "group", label: "Cold", collapsed: true },
      { kind: "data", labels: ["Cold", "Cold Brew"], cells: [cell("5"), cell("6")] },
    ],
  };
}

test("a group header consumes no data row index", () => {
  const plan = gridPlan(grouped());
  const data = plan.body.filter((r) => r.kind === "data");
  assert.deepEqual(data.map((r) => r.row), [0, 1, 2]);
  // And every cell in a row carries that row's index, not its position in
  // `rows` — the coordinate a click sends.
  assert.deepEqual(
    data.at(-1).cells.map((c) => [c.row, c.col]),
    [[2, 0], [2, 1]],
  );
});

test("a group header spans the labels and the cells together", () => {
  const plan = gridPlan(grouped());
  const groups = plan.body.filter((r) => r.kind === "group");
  assert.deepEqual(groups.map((r) => r.colSpan), [4, 4]);
  assert.deepEqual(groups.map((r) => r.text), ["▼ Hot", "▶ Cold"]);
  assert.equal(plan.cornerSpan, 2);
});

test("a column run in no group is blank, and an empty name is a name", () => {
  const model = grouped();
  model.col_groups = [
    { span: 1, label: null, collapsed: false },
    { span: 1, label: "", collapsed: true },
  ];
  const plan = gridPlan(model);
  assert.deepEqual(plan.groups, [
    { span: 1, text: "" },
    { span: 1, text: "▶ " },
  ]);
});

test("the typed text replaces only the selected cell, and carries a caret", () => {
  const model = grouped();
  model.editing = "12";
  model.rows[1].cells[1].selected = true;
  const plan = gridPlan(model);
  const row = plan.body[1];
  assert.equal(row.cells[0].text, "1");
  assert.equal(row.cells[1].text, "12▏");
  assert.equal(row.cells[1].classes.typing, true);
  // A cell being typed into is not drawn as a number: the buffer is text.
  assert.equal(row.cells[1].classes.numeric, false);
  assert.equal(row.cells[0].classes.numeric, true);
});

test("a selected cell with no editor open is not typing", () => {
  const model = grouped();
  model.editing = null;
  model.rows[1].cells[0].selected = true;
  const plan = gridPlan(model);
  const first = plan.body[1].cells[0];
  assert.equal(first.classes.typing, false);
  assert.equal(first.classes.selected, true);
  assert.equal(first.text, "1");
});

test("an empty edit buffer still means an editor is open", () => {
  const model = grouped();
  model.editing = "";
  model.rows[1].cells[0].selected = true;
  const plan = gridPlan(model);
  assert.equal(plan.body[1].cells[0].classes.typing, true);
  assert.equal(plan.body[1].cells[0].text, "▏");
});

test("an empty totals strip is no strip at all, not a row of blanks", () => {
  // Gotcha 33: an EMPTY strip means this grid has no totals — records mode,
  // or an empty grid — so there is nothing to draw and nothing to pad.
  assert.equal(gridPlan(grouped()).totals, null);
});

test("the totals strip is relayed, and its label spans the row headers", () => {
  const model = grouped();
  model.totals = [
    { text: "9,001", numeric: true, error: false },
    { text: "err", numeric: false, error: true },
  ];
  const plan = gridPlan(model);
  assert.equal(plan.totals.span, 2, "the label spans every row-header level");
  assert.equal(plan.totals.label, "Total");
  assert.deepEqual(
    plan.totals.cells.map((c) => [c.text, c.classes.numeric, c.classes.error]),
    [
      ["9,001", true, false],
      ["err", false, true],
    ],
  );
  // And it carries no coordinates: a total is not a cell a click can name.
  assert.ok(!("row" in plan.totals.cells[0]));
});