import { describe, expect, it } from "vitest";
import { SUDOKU_DOCUMENT_SCHEMA } from "../../src/formats";
import {
  PROJECT_RECORD_SCHEMA,
  ProjectLibrary,
  createProjectRecord,
  normalizeProjectRecord,
} from "../../src/storage";

const puzzle = {
  schema: SUDOKU_DOCUMENT_SCHEMA,
  version: 1 as const,
  size: 9,
  givens: Array<number>(81).fill(0),
  constraints: [],
};

describe("local project library", () => {
  it("stores independent bounded clones in the memory fallback", async () => {
    const library = new ProjectLibrary({ indexedDB: null });
    const record = createProjectRecord(puzzle, {
      id: "one",
      title: "First",
      now: 100,
      progress: {
        version: 1,
        values: Array<number>(81).fill(0),
        cornerMarks: Array.from({ length: 81 }, () => [1, 2]),
        centerMarks: Array.from({ length: 81 }, () => [3]),
        colors: Array<number>(81).fill(2),
        elapsedMs: 1234,
      },
    });
    await library.put(record);
    const loaded = await library.get("one");
    expect(loaded).toEqual(record);
    (loaded?.puzzle.givens as number[])[0] = 9;
    expect((await library.get("one"))?.puzzle.givens[0]).toBe(0);
    expect(library.mode).toBe("memory");
  });

  it("lists newest first, deletes and clears", async () => {
    const library = new ProjectLibrary({ indexedDB: null });
    await library.put(
      createProjectRecord(puzzle, { id: "old", title: "Old", now: 1 }),
    );
    await library.put(
      createProjectRecord(puzzle, { id: "new", title: "New", now: 2 }),
    );
    expect((await library.list()).map(({ id }) => id)).toEqual(["new", "old"]);
    expect(await library.delete("old")).toBe(true);
    expect(await library.delete("missing")).toBe(false);
    await library.clear();
    expect(await library.list()).toEqual([]);
  });

  it("searches tags, exposes safe thumbnails and exports a selection", async () => {
    const library = new ProjectLibrary({ indexedDB: null });
    await library.put(
      createProjectRecord(puzzle, {
        id: "killer",
        title: "Evening Killer",
        tags: ["killer", "hard"],
        now: 1,
      }),
    );
    await library.put(
      createProjectRecord(puzzle, {
        id: "classic",
        title: "Morning Classic",
        tags: ["classic"],
        now: 2,
      }),
    );

    expect(
      (await library.list({ search: "kill" })).map(({ id }) => id),
    ).toEqual(["killer"]);
    expect(
      (await library.list({ tags: ["classic"] }))[0]?.thumbnail,
    ).toHaveLength(81);
    expect((await library.exportSelected(["classic"])).projects).toHaveLength(
      1,
    );
  });

  it("keeps recoverable autosaves separate from explicit projects", async () => {
    const library = new ProjectLibrary({ indexedDB: null });
    const record = createProjectRecord(puzzle, {
      id: "draft",
      title: "Draft",
      now: 1,
    });
    await library.putAutosave(record);
    expect((await library.getAutosave())?.id).toBe("draft");
    expect(await library.list()).toEqual([]);
    await library.clearAutosave();
    expect(await library.getAutosave()).toBeUndefined();
  });

  it("duplicates selected projects with independent IDs and progress", async () => {
    const library = new ProjectLibrary({ indexedDB: null });
    await library.put(
      createProjectRecord(puzzle, {
        id: "source",
        title: "Source",
        tags: ["classic"],
        now: 10,
        progress: { version: 1, values: Array<number>(81).fill(0) },
      }),
    );
    expect(await library.duplicateSelected(["source", "missing"])).toBe(1);
    const records = await library.exportAll();
    expect(records.projects).toHaveLength(2);
    const copy = records.projects.find((record) => record.id !== "source");
    expect(copy).toMatchObject({ title: "Source copy", tags: ["classic"] });
    expect(copy?.id).not.toBe("source");
  });

  it("exports and imports an explicitly versioned library", async () => {
    const source = new ProjectLibrary({ indexedDB: null });
    await source.put(createProjectRecord(puzzle, { id: "one", now: 10 }));
    const exported = await source.exportAll();
    const target = new ProjectLibrary({ indexedDB: null });
    expect(await target.importAll(exported)).toBe(1);
    expect(await target.get("one")).toEqual(await source.get("one"));
  });

  it("retains source extras through explicit saves, autosaves and reopening", async () => {
    const sourcePuzzle = {
      ...puzzle,
      visuals: [
        {
          type: "text" as const,
          layer: "overlay" as const,
          position: { kind: "cell" as const, cell: 0 },
          text: "retained",
          style: { fill: "#123456" },
        },
      ],
      source: { format: "sudokupad" as const, id: "source-identity" },
      metadata: { edition: "local" },
    };
    const library = new ProjectLibrary({ indexedDB: null });
    const record = createProjectRecord(sourcePuzzle, {
      id: "preserved",
      title: "Preserved",
      now: 10,
    });

    await library.put(record);
    await library.putAutosave({ ...record, updatedAt: 11 });
    const exported = await library.exportAll();
    const reopened = await library.get("preserved");
    const autosave = await library.getAutosave();

    for (const stored of [reopened, autosave, exported.projects[0]]) {
      expect(stored?.puzzle.visuals).toEqual(sourcePuzzle.visuals);
      expect(stored?.puzzle.source).toEqual(sourcePuzzle.source);
      expect(stored?.puzzle.metadata).toEqual(sourcePuzzle.metadata);
    }
  });

  it("falls back when IndexedDB cannot be opened", async () => {
    const broken = {
      open: () => {
        throw new Error("blocked");
      },
    } as unknown as IDBFactory;
    const library = new ProjectLibrary({ indexedDB: broken });
    expect(await library.ready()).toBe("memory");
    await library.put(createProjectRecord(puzzle, { id: "fallback", now: 1 }));
    expect(await library.get("fallback")).toBeDefined();
  });

  it("rejects malformed record versions and progress", () => {
    expect(() =>
      normalizeProjectRecord({
        schema: PROJECT_RECORD_SCHEMA,
        version: 2,
      }),
    ).toThrow(/Unsupported project record/u);
    const record = createProjectRecord(puzzle, { id: "bad", now: 1 });
    expect(() =>
      normalizeProjectRecord({
        ...record,
        progress: { version: 1, values: [0] },
      }),
    ).toThrow(/must contain 81/u);
  });

  it("bounds tags and rejects executable thumbnail markup", () => {
    const record = createProjectRecord(puzzle, { id: "bounded", now: 1 });
    expect(() =>
      normalizeProjectRecord({
        ...record,
        tags: Array.from({ length: 21 }, (_, index) => `tag-${String(index)}`),
      }),
    ).toThrow(/at most 20/u);
    expect(() =>
      normalizeProjectRecord({
        ...record,
        thumbnail: `<svg onload="alert(1)">${".".repeat(58)}`,
      }),
    ).toThrow(/safe row-major grid preview/u);
  });
});