import { test } from "node:test";

import assert from "node:assert/strict";

import { parseConflicts, resolveRegion, candidateBase } from "../out/markers.mjs";

test("parses order conflicts with several sides", () => {

  const lines = [

    "a",

    '<<<<<<< oxy conflict 1 of 2, side 1 of 3: change 872724ae "Doing"',

    "How are you doing?",

    '======= oxy conflict 1 of 2, side 2 of 3: change 194a1869 "Today"',

    "How are you today?",

    '======= oxy conflict 1 of 2, side 3 of 3: change 55555555 "Third"',

    "third",

    "more third",

    ">>>>>>> oxy conflict 1 of 2 end",

    "z",

  ];

  const regions = parseConflicts(lines);

  assert.equal(regions.length, 1);

  const r = regions[0];

  assert.deepEqual([r.number, r.total, r.start, r.end], [1, 2, 1, 8]);

  assert.deepEqual(r.sides.map((s) => [s.number, s.label, s.start, s.end]), [

    [1, '872724ae "Doing"', 2, 3],

    [2, '194a1869 "Today"', 4, 5],

    [3, '55555555 "Third"', 6, 8],

  ]);

  assert.deepEqual(resolveRegion(lines, r, [2]), ["How are you today?"]);

  assert.deepEqual(resolveRegion(lines, r, [1, 3]), ["How are you doing?", "third", "more third"]);

});

test("parses delete versus insert conflicts", () => {

  const lines = [

    "<<<<<<< oxy conflict 1 of 1, side 1 of 2: deleted by change 0101",

    "-------",

    "a",

    "======= oxy conflict 1 of 1, side 2 of 2: change 0202",

    "after-a",

    ">>>>>>> oxy conflict 1 of 1 end",

  ];

  const [r] = parseConflicts(lines);

  assert.equal(r.sides[0].deleted, true);

  assert.deepEqual([r.sides[0].start, r.sides[0].end], [2, 3]);

  assert.deepEqual(resolveRegion(lines, r, [1]), [], "accepting the deletion keeps nothing");

  assert.deepEqual(resolveRegion(lines, r, [2]), ["after-a"]);

  assert.deepEqual(parseConflicts(["plain", "text"]), []);

});

test("candidate names", () => {

  assert.equal(candidateBase("dir/a.txt.oxy-conflict-2"), "dir/a.txt");

  assert.equal(candidateBase("a.txt"), undefined);

});