import { getPayload, Payload } from "payload";
import config from "@/payload.config";

import { afterAll, beforeAll, beforeEach, describe, expect, it } from "vitest";

import type { Role, User } from "@/payload-types";
import { Announcements } from "@/collections/Announcements";
import { invalidatePermissionCache } from "@/utils/access-control/loadUserPermissions";
import {
  isAnnouncementActive,
  isWithinWindow,
  matchesAudience,
  matchesPath,
  type AnnouncementEntry,
} from "@/lib/announcements/evaluate";
import {
  readAnnouncementDismissals,
  storeAnnouncementDismissal,
  writeAnnouncementDismissals,
} from "@/lib/announcements/dismissals";

let payload: Payload;

const RUN = `ann-${Date.now().toString(36)}`;
const TIMEOUT = 30_000;

const NOW = 1_700_000_000_000;
const HOUR = 60 * 60 * 1000;

const base: AnnouncementEntry = {
  id: 1,
  title: "Test announcement",
  variant: "info",
  displayType: "banner",
  enabled: true,
  dismissible: true,
  targeting: { audience: "all" },
  paths: { matchType: "all" },
};

describe("announcement evaluation (pure)", () => {
  it("treats missing bounds as an open window", () => {
    expect(isWithinWindow({ ...base, activeFrom: null, activeUntil: null }, NOW)).toBe(true);
  });

  it("respects activeFrom and activeUntil", () => {
    expect(isWithinWindow({ ...base, activeFrom: new Date(NOW + HOUR).toISOString() }, NOW)).toBe(
      false,
    );
    expect(isWithinWindow({ ...base, activeFrom: new Date(NOW - HOUR).toISOString() }, NOW)).toBe(
      true,
    );
    expect(isWithinWindow({ ...base, activeUntil: new Date(NOW).toISOString() }, NOW)).toBe(false);
    expect(
      isWithinWindow({ ...base, activeUntil: new Date(NOW + HOUR).toISOString() }, NOW),
    ).toBe(true);
  });

  it("audience all matches anyone; users matches by id; roles matches any listed roleDoc id", () => {
    expect(matchesAudience({ ...base, targeting: { audience: "all" } }, 7, [])).toBe(true);

    expect(
      matchesAudience({ ...base, targeting: { audience: "users", users: [7, 9] } }, 9, []),
    ).toBe(true);
    expect(
      matchesAudience({ ...base, targeting: { audience: "users", users: [7, 9] } }, 8, []),
    ).toBe(false);
    expect(matchesAudience({ ...base, targeting: { audience: "users" } }, null, [])).toBe(false);
    expect(
      matchesAudience(
        { ...base, targeting: { audience: "users", users: [{ id: 7 }] as never } },
        7,
        [],
      ),
    ).toBe(true);

    expect(
      matchesAudience(
        { ...base, targeting: { audience: "roles", roles: [3, 5] } },
        null,
        [2],
      ),
    ).toBe(false);
    expect(
      matchesAudience(
        { ...base, targeting: { audience: "roles", roles: [3, 5] } },
        1,
        [2, 5],
      ),
    ).toBe(true);
    expect(
      matchesAudience({ ...base, targeting: { audience: "roles" } }, 1, []),
    ).toBe(false);
  });

  it("isAnnouncementActive requires enabled", () => {
    expect(isAnnouncementActive({ ...base, enabled: false }, 1, [], "/logistics", NOW)).toBe(
      false,
    );
    expect(isAnnouncementActive(base, 1, [], "/logistics", NOW)).toBe(true);
  });

  it("path matching supports all, include prefixes, and exclude", () => {
    expect(matchesPath("/logistics/market", { matchType: "all" })).toBe(true);
    expect(
      matchesPath("/logistics/market", { matchType: "include", paths: ["/logistics"] }),
    ).toBe(true);
    expect(matchesPath("/wiki/some-page", { matchType: "include", paths: ["/logistics"] })).toBe(
      false,
    );
    expect(
      matchesPath("/wiki/some-page", { matchType: "exclude", paths: ["/logistics"] }),
    ).toBe(true);
    expect(
      matchesPath("/logistics/market", { matchType: "exclude", paths: ["/logistics"] }),
    ).toBe(false);
    expect(matchesPath("/logistics", { matchType: "include", paths: ["/logistics"] })).toBe(true);
    expect(
      matchesPath("/logistics-market", { matchType: "include", paths: ["/logistics"] }),
    ).toBe(false);
  });

  it("isAnnouncementActive requires enabled", () => {
    expect(isAnnouncementActive({ ...base, enabled: false }, 1, [], "/logistics", NOW)).toBe(
      false,
    );
    expect(isAnnouncementActive(base, 1, [], "/logistics", NOW)).toBe(true);
  });
});

describe("announcement dismissals (localStorage)", () => {
  beforeEach(() => {
    window.localStorage.clear();
  });

  it("roundtrips dismissals and drops expired entries on read", () => {
    writeAnnouncementDismissals({ "1": NOW + HOUR, "2": NOW - HOUR }, NOW);
    const read = readAnnouncementDismissals(NOW);
    expect(read["1"]).toBe(NOW + HOUR);
    expect(read["2"]).toBeUndefined();
  });

  it("storeAnnouncementDismissal expires at activeUntil when set", () => {
    storeAnnouncementDismissal(5, new Date(NOW + 2 * HOUR).toISOString(), NOW);
    storeAnnouncementDismissal(6, new Date(NOW - 2 * HOUR).toISOString(), NOW);
    storeAnnouncementDismissal(7, null, NOW);
    const read = readAnnouncementDismissals(NOW);
    expect(read["5"]).toBe(NOW + 2 * HOUR);
    // Expired activeUntil still yields the 30-day fallback.
    expect(read["6"]).toBeGreaterThan(NOW);
    expect(read["7"]).toBeGreaterThan(NOW + 29 * 24 * HOUR);
  });
});

describe("announcements collection access control", () => {
  const roleIds: number[] = [];
  const userIds: number[] = [];
  const announcementIds: number[] = [];

  let permittedUser: User;
  let plainUser: User;
  let devUser: User;

  const makeRole = async (label: string, extra: Partial<Role> = {}): Promise<Role> => {
    const role = (await payload.create({
      collection: "roles",
      data: { name: `${RUN}-${label}`, slug: `${RUN}-${label}`, ...extra },
      overrideAccess: true,
      depth: 0,
    })) as unknown as Role;
    roleIds.push(role.id);
    return role;
  };

  const makeUser = async (label: string, roleId: number): Promise<User> => {
    const user = (await payload.create({
      collection: "users",
      data: {
        username: `${RUN}-${label}`,
        discordUsername: `${RUN}-${label}`,
        displayName: label.toUpperCase(),
        steamId: `7656119${Math.floor(Math.random() * 1e9)}`,
        password: "Test123",
        roleDocs: [roleId],
      },
      overrideAccess: true,
      depth: 0,
    })) as unknown as User;
    userIds.push(user.id);
    return user;
  };

  const accessDecision = async (
    action: "create" | "read" | "update" | "delete",
    user: User | null,
  ): Promise<unknown> => {
    const fn = Announcements.access?.[action];
    expect(typeof fn).toBe("function");
    return await (fn as (args: { req: unknown }) => Promise<unknown>)({
      req: { user, payload },
    });
  };

  beforeAll(async () => {
    const payloadConfig = await config;
    payload = await getPayload({ config: payloadConfig });
    invalidatePermissionCache();

    const permittedRole = await makeRole("permitted", {
      permissions: [
        "announcements:create",
        "announcements:read",
        "announcements:update",
        "announcements:delete",
      ],
    });
    const plainRole = await makeRole("plain", { permissions: [] });
    const devRole = await makeRole("dev", { isSuperuser: true });

    permittedUser = await makeUser("permitted", permittedRole.id);
    plainUser = await makeUser("plain", plainRole.id);
    devUser = await makeUser("dev", devRole.id);
  }, TIMEOUT);

  afterAll(async () => {
    if (!payload) return;
    for (const id of announcementIds) {
      await payload
        .delete({ collection: "announcements", id, overrideAccess: true })
        .catch(() => {});
    }
    for (const id of userIds) {
      await payload.delete({ collection: "users", id, overrideAccess: true }).catch(() => {});
    }
    for (const id of roleIds) {
      await payload.delete({ collection: "roles", id, overrideAccess: true }).catch(() => {});
    }
  });

  it("grants CRUD to roles holding the announcements permissions", async () => {
    expect(await accessDecision("read", permittedUser)).toBe(true);
    expect(await accessDecision("create", permittedUser)).toBe(true);
    expect(await accessDecision("update", permittedUser)).toBe(true);
    expect(await accessDecision("delete", permittedUser)).toBe(true);
  });

  it("denies users without announcements permissions", async () => {
    expect(await accessDecision("read", plainUser)).toBe(false);
    expect(await accessDecision("create", plainUser)).toBe(false);
  });

  it("grants superusers everything and denies anonymous users", async () => {
    expect(await accessDecision("read", devUser)).toBe(true);
    expect(await accessDecision("delete", devUser)).toBe(true);
    expect(await accessDecision("read", null)).toBe(false);
    expect(await accessDecision("create", null)).toBe(false);
  });

  it("roundtrips an announcement through the local API", async () => {
    const created = (await payload.create({
      collection: "announcements",
      data: {
        title: `${RUN} maintenance window`,
        variant: "warning",
        displayType: "banner",
        enabled: true,
        dismissible: false,
        targeting: { audience: "roles", roles: [roleIds[0]] },
        paths: { matchType: "exclude", paths: ["/admin"] },
      },
      overrideAccess: true,
      depth: 0,
    })) as { id: number };
    announcementIds.push(created.id);

    const found = await payload.find({
      collection: "announcements",
      where: { enabled: { equals: true } },
      limit: 50,
      depth: 0,
      overrideAccess: true,
    });
    const doc = found.docs.find((d) => d.id === created.id);
    expect(doc).toBeDefined();
    expect(doc?.title).toBe(`${RUN} maintenance window`);
    expect((doc as { targeting: { roles: number[] } }).targeting.roles).toContain(roleIds[0]);

    await payload.delete({ collection: "announcements", id: created.id, overrideAccess: true });
    announcementIds.pop();
  }, TIMEOUT);
});