import { expect, test } from "bun:test";
import { mkdtemp, readFile, rm } from "node:fs/promises";
import { tmpdir } from "node:os";
import { join } from "node:path";
import { newDatabase, newTrack } from "../src/model.ts";
import { writePdb } from "../src/pdb/writer.ts";
import { PAGE_SIZE } from "../src/pdb/pager.ts";

test("writes a multi-page-aligned pdb file", async () => {
    const dir = await mkdtemp(join(tmpdir(), "maple-ts-"));
    try {
        const db = newDatabase();
        db.artists.push({ id: 1, name: "A" });
        db.albums.push({ id: 1, name: "Alb", artist_id: 1 });
        db.tracks.push(newTrack({
            id: 1, title: "T", artist_id: 1, album_id: 1,
            filename: "t.mp3", file_path: "/Contents/A/Alb/t.mp3",
        }));
        db.playlist_nodes.push({ id: 1, parent_id: 0, sort_order: 1, name: "P", is_folder: false });
        db.playlist_entries.push({ playlist_id: 1, track_id: 1, entry_index: 1 });

        const out = join(dir, "export.pdb");
        await writePdb(db, out);
        const buf = await readFile(out);
        expect(buf.length % PAGE_SIZE).toBe(0);
        expect(buf.length).toBeGreaterThanOrEqual(PAGE_SIZE * 6);
    } finally {
        await rm(dir, { recursive: true, force: true });
    }
});