import { describe, it, expect, vi, afterEach } from "vitest";

vi.mock("@/lib/musicbrainz", () => ({ browseReleaseGroups: vi.fn() }));
import { browseReleaseGroups } from "@/lib/musicbrainz";
import { prisma } from "@/lib/db";
import { POST } from "./route";

const mockBrowse = vi.mocked(browseReleaseGroups);
afterEach(() => mockBrowse.mockReset());

function post(id: string, body: unknown) {
  return POST(
    new Request(`http://localhost/api/discover/${id}`, {
      method: "POST",
      headers: { "content-type": "application/json" },
      body: JSON.stringify(body),
    }),
    { params: Promise.resolve({ id }) },
  );
}

async function artist(mbid = "a1") {
  return prisma.discoverySuggestion.create({
    data: { kind: "artist", artistMbid: mbid, artistName: "Cand", score: 1, seedCount: 1,
            sources: ["listenbrainz"], secondaryTypes: [], dedupeKey: `artist:${mbid}:` },
  });
}
async function album(rg = "rg1") {
  return prisma.discoverySuggestion.create({
    data: { kind: "album", artistMbid: "a9", artistName: "Band", rgMbid: rg, album: "Rec",
            primaryType: "Album", score: 1, seedCount: 1, sources: ["listenbrainz"],
            secondaryTypes: [], firstReleaseDate: "2023", dedupeKey: `album:a9:${rg}` },
  });
}

describe("discover action API", () => {
  it("dismiss marks the suggestion dismissed", async () => {
    const s = await artist("d1");
    const res = await post(s.id, { action: "dismiss" });
    expect(res.status).toBe(200);
    expect((await prisma.discoverySuggestion.findUnique({ where: { id: s.id } }))!.status).toBe("dismissed");
  });

  it("follow creates a WatchedArtist + unmonitored discography and marks followed", async () => {
    mockBrowse.mockResolvedValue([
      { rgMbid: "rg1", title: "Debut", primaryType: "Album", secondaryTypes: [], firstReleaseDate: "2019" },
    ]);
    const s = await artist("f1");
    const res = await post(s.id, { action: "follow" });
    expect(res.status).toBe(200);
    expect(await prisma.watchedArtist.findUnique({ where: { mbid: "f1" } })).not.toBeNull();
    const rel = await prisma.monitoredRelease.findUnique({ where: { rgMbid: "rg1" } });
    expect(rel).toMatchObject({ monitored: false, artistName: "Cand" });
    expect((await prisma.discoverySuggestion.findUnique({ where: { id: s.id } }))!.status).toBe("followed");
  });

  it("follow is idempotent when already following (no MB call, still marks followed)", async () => {
    await prisma.watchedArtist.create({ data: { mbid: "f2", name: "Cand" } });
    const s = await artist("f2");
    const res = await post(s.id, { action: "follow" });
    expect(res.status).toBe(200);
    expect(mockBrowse).not.toHaveBeenCalled();
    expect((await prisma.discoverySuggestion.findUnique({ where: { id: s.id } }))!.status).toBe("followed");
  });

  it("dismissing an artist also dismisses its pending album suggestions", async () => {
    const a = await prisma.discoverySuggestion.create({
      data: { kind: "artist", artistMbid: "shared", artistName: "Cand", score: 1, seedCount: 1,
              sources: ["listenbrainz"], secondaryTypes: [], dedupeKey: "artist:shared:" },
    });
    const alb = await prisma.discoverySuggestion.create({
      data: { kind: "album", artistMbid: "shared", artistName: "Cand", rgMbid: "rgS", album: "Rec",
              albumReason: "newest", score: 1, seedCount: 1, sources: ["listenbrainz"],
              secondaryTypes: [], dedupeKey: "album:shared:rgS" },
    });
    await post(a.id, { action: "dismiss" });
    expect((await prisma.discoverySuggestion.findUnique({ where: { id: alb.id } }))!.status).toBe("dismissed");
  });

  it("want upserts a monitored release from the suggestion and marks wanted", async () => {
    const s = await album("rgW");
    const res = await post(s.id, { action: "want" });
    expect(res.status).toBe(200);
    const rel = await prisma.monitoredRelease.findUnique({ where: { rgMbid: "rgW" } });
    expect(rel).toMatchObject({ album: "Rec", monitored: true, artistName: "Band" });
    expect((await prisma.discoverySuggestion.findUnique({ where: { id: s.id } }))!.status).toBe("wanted");
  });

  it("rejects bad action, mismatched kind, and unknown id", async () => {
    const a = await artist("m1");
    expect((await post(a.id, { action: "nope" })).status).toBe(400);
    expect((await post(a.id, { action: "want" })).status).toBe(400);      // want on artist
    const al = await album("rgM");
    expect((await post(al.id, { action: "follow" })).status).toBe(400);   // follow on album
    expect((await post("missing", { action: "dismiss" })).status).toBe(404);
  });
});