/**
 * ─────────────────────────────────────────────
 *  SPB Git — Personal Git Platform
 * ─────────────────────────────────────────────
 *  Author  : Simon-Pierre Boucher
 *  Contact : contact@spboucher.ai
 *  File    : test/unit/diff.test.mjs
 *  Purpose : Unit tests — unified diff parsing + git path unquoting
 *  License : MIT © Simon-Pierre Boucher
 * ─────────────────────────────────────────────
 */

import { describe, it, expect } from 'vitest';
import { parseUnifiedDiff, unquoteGitPath } from '../../src/git/repo.mjs';

const SAMPLE = `diff --git a/src/app.js b/src/app.js
index 1111111..2222222 100644
--- a/src/app.js
+++ b/src/app.js
@@ -1,4 +1,5 @@
 const a = 1;
-const b = 2;
+const b = 3;
+const c = 4;
 export { a, b };
diff --git a/new.txt b/new.txt
new file mode 100644
index 0000000..3333333
--- /dev/null
+++ b/new.txt
@@ -0,0 +1,2 @@
+hello
+world
diff --git a/img.png b/img.png
Binary files a/img.png and b/img.png differ
`;

describe('parseUnifiedDiff', () => {
  it('parses files, hunks, line numbers, and stats', () => {
    const files = parseUnifiedDiff(SAMPLE);
    expect(files).toHaveLength(3);

    const [modified, added, binary] = files;
    expect(modified.newPath).toBe('src/app.js');
    expect(modified.status).toBe('modified');
    expect(modified.additions).toBe(2);
    expect(modified.deletions).toBe(1);
    expect(modified.hunks).toHaveLength(1);
    const lines = modified.hunks[0].lines;
    expect(lines[0]).toMatchObject({ type: 'ctx', old: 1, new: 1 });
    expect(lines[1]).toMatchObject({ type: 'del', old: 2, new: null });
    expect(lines[2]).toMatchObject({ type: 'add', old: null, new: 2 });
    expect(lines[3]).toMatchObject({ type: 'add', old: null, new: 3 });
    expect(lines[4]).toMatchObject({ type: 'ctx', old: 3, new: 4 });

    expect(added.status).toBe('added');
    expect(added.additions).toBe(2);

    expect(binary.binary).toBe(true);
  });

  it('handles empty input', () => {
    expect(parseUnifiedDiff('')).toEqual([]);
  });
});

describe('unquoteGitPath', () => {
  it('passes through plain paths', () => {
    expect(unquoteGitPath('src/app.js')).toBe('src/app.js');
  });
  it('decodes octal utf-8 escapes', () => {
    expect(unquoteGitPath('"docs/\\303\\251t\\303\\251.txt"')).toBe('docs/été.txt');
  });
  it('decodes simple escapes', () => {
    expect(unquoteGitPath('"a\\"b\\\\c"')).toBe('a"b\\c');
  });
});