// Rôle : vérifie les règles de nommage, d’écriture et de rétention des sauvegardes locales.
import { test } from "node:test";
import assert from "node:assert/strict";
import { backupContentsEqual, getBackupFileName, getLocalDateKey, isFileSystemAccessSupported, saveBackup } from "../website/src/features/toolboxes/storage/autoBackup.js";

class FakeDirectory {
  constructor(names = []) {
    this.files = new Map(names.map((name) => [name, "old"]));
    this.directories = new Set();
    this.permission = "granted";
    this.failCleanup = false;
    this.failWrite = false;
  }

  async queryPermission() { return this.permission; }

  async *values() {
    for (const name of this.files.keys()) yield { kind: "file", name };
    for (const name of this.directories) yield { kind: "directory", name };
  }

  async getFileHandle(name, { create = false } = {}) {
    if (create && !this.files.has(name)) this.files.set(name, "");
    const directory = this;
    return {
      async getFile() {
        return { text: async () => directory.files.get(name) || "" };
      },
      async createWritable() {
        if (directory.failWrite) throw new Error("write failed");
        return {
          async write(contents) { directory.files.set(name, contents); },
          async close() {},
          async abort() {}
        };
      }
    };
  }

  async removeEntry(name) {
    if (this.failCleanup) throw new Error("cleanup failed");
    this.files.delete(name);
  }
}

test("feature detection does not rely on the user agent", () => {
  assert.equal(isFileSystemAccessSupported({ showDirectoryPicker() {} }), true);
  assert.equal(isFileSystemAccessSupported({}), false);
});

test("backup names use the browser local date", () => {
  const date = new Date(2026, 8, 24, 0, 5);
  assert.equal(getLocalDateKey(date), "2026-09-24");
  assert.equal(getBackupFileName(date), "sokkog-global-2026-09-24.json");
});

test("automatic backup skips an existing day and creates the next day", async () => {
  const directory = new FakeDirectory(["sokkog-global-2026-09-23.json"]);
  let generated = 0;
  const generateJson = async () => { generated += 1; return "{}"; };
  const first = await saveBackup({ directoryHandle: directory, generateJson, date: new Date(2026, 8, 23) });
  const second = await saveBackup({ directoryHandle: directory, generateJson, date: new Date(2026, 8, 24) });
  assert.equal(first.created, false);
  assert.equal(second.created, true);
  assert.equal(generated, 1);
  assert.ok(directory.files.has("sokkog-global-2026-09-24.json"));
});

test("automatic backup skips a new day when the export is unchanged", async () => {
  const previous = JSON.stringify({ version: 1, exportedAt: "2026-09-23T08:00:00.000Z", toolboxes: [], modules: {}, links: {} });
  const directory = new FakeDirectory(["sokkog-global-2026-09-23.json"]);
  directory.files.set("sokkog-global-2026-09-23.json", previous);
  const current = JSON.stringify({ version: 1, exportedAt: "2026-09-24T08:00:00.000Z", toolboxes: [], modules: {}, links: {} });
  const result = await saveBackup({ directoryHandle: directory, generateJson: async () => current, date: new Date(2026, 8, 24) });
  assert.equal(backupContentsEqual(previous, current), true);
  assert.equal(result.ok, true);
  assert.equal(result.created, false);
  assert.equal(result.unchanged, true);
  assert.equal(directory.files.has("sokkog-global-2026-09-24.json"), false);
});

test("manual backup replaces the day and retains ten non-consecutive versions", async () => {
  const names = [
    "sokkog-global-2024-01-01.json", "sokkog-global-2024-06-01.json", "sokkog-global-2025-01-01.json",
    "sokkog-global-2025-03-01.json", "sokkog-global-2025-09-01.json", "sokkog-global-2026-01-01.json",
    "sokkog-global-2026-03-01.json", "sokkog-global-2026-06-01.json", "sokkog-global-2026-07-01.json",
    "sokkog-global-2026-08-01.json", "sokkog-global-2026-09-24.json", "notes.json"
  ];
  const directory = new FakeDirectory(names);
  const result = await saveBackup({ directoryHandle: directory, force: true, date: new Date(2026, 8, 24), generateJson: async () => "new" });
  assert.equal(result.ok, true);
  assert.equal(directory.files.get("sokkog-global-2026-09-24.json"), "new");
  assert.equal([...directory.files.keys()].filter((name) => /^sokkog-global-\d{4}-\d{2}-\d{2}\.json$/.test(name)).length, 10);
  assert.equal(directory.files.get("notes.json"), "old");
});

test("missing permission never opens a prompt or starts an export", async () => {
  for (const permission of ["prompt", "denied"]) {
    const directory = new FakeDirectory();
    directory.permission = permission;
    directory.requestPermission = () => { throw new Error("Permission popup must require user interaction"); };
    let generated = false;
    const result = await saveBackup({ directoryHandle: directory, generateJson: async () => { generated = true; return "{}"; } });
    assert.equal(result.reason, "permission");
    assert.equal(result.permission, permission);
    assert.equal(generated, false);
  }
});

test("cleanup failure does not invalidate a successfully written backup", async () => {
  const directory = new FakeDirectory(Array.from({ length: 10 }, (_, index) => `sokkog-global-2020-01-${String(index + 1).padStart(2, "0")}.json`));
  directory.failCleanup = true;
  const result = await saveBackup({ directoryHandle: directory, generateJson: async () => "{}", date: new Date(2026, 8, 24) });
  assert.equal(result.ok, true);
  assert.match(result.cleanupError, /cleanup failed/);
  assert.equal(directory.files.get("sokkog-global-2026-09-24.json"), "{}");
});

test("failed write does not leave a newly created backup", async () => {
  const directory = new FakeDirectory();
  directory.failWrite = true;
  const result = await saveBackup({ directoryHandle: directory, generateJson: async () => "{}", date: new Date(2026, 8, 24) });
  assert.equal(result.ok, false);
  assert.equal(directory.files.has("sokkog-global-2026-09-24.json"), false);
});

test("export failure does not create a partial backup", async () => {
  const directory = new FakeDirectory();
  const result = await saveBackup({ directoryHandle: directory, generateJson: async () => { throw new Error("export failed"); }, date: new Date(2026, 8, 24) });
  assert.equal(result.ok, false);
  assert.equal(directory.files.has("sokkog-global-2026-09-24.json"), false);
});