import { beforeEach, describe, expect, it, jest } from '@jest/globals';

import handler from '~background/messages/domain/config';
import { API_URL } from '~utils/constants';
import type { DomainConfig } from '~utils/types';

describe('background/messages/domain/config.ts', () => {
  const body = { domain: 'example.com' };
  const req = { name: 'domain/config' as const };
  const res = { send: jest.fn() };

  beforeEach(() => {
    jest.clearAllMocks();
  });

  it('should return success: false when domain is missing in request', async () => {
    await handler(req, res);

    expect(res.send).toHaveBeenCalledWith({ success: false });
  });

  it('should return cached data when issue is still valid', async () => {
    const config: DomainConfig = {
      issue: {
        expiresAt: Date.now() + 8 * 60 * 60 * 1000,
        flags: ['jest'],
        url: 'https://jestjs.io/',
      },
      on: false,
    };

    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
    // @ts-ignore
    global.fetch = jest.fn(() =>
      Promise.resolve({
        json: () =>
          Promise.resolve({
            data: {
              flags: config.issue?.flags,
              url: config.issue?.url,
            },
            success: true,
          }),
        status: 200,
      })
    );

    await chrome.storage.local.set({ 'example.com': config });
    await handler({ ...req, body }, res);

    expect(chrome.storage.local.get).toHaveBeenCalledWith('example.com');
    expect(res.send).toHaveBeenCalledWith({ data: config, success: true });
    expect(global.fetch).not.toHaveBeenCalled();
  });

  it('should fetch new issue data if issue is expired', async () => {
    const previous: DomainConfig = {
      issue: {
        expiresAt: Date.now() - 8 * 60 * 60 * 1000,
        flags: ['jest'],
        url: 'https://jestjs.io/',
      },
      on: false,
    };
    const next: DomainConfig = {
      issue: {
        expiresAt: Date.now() + 8 * 60 * 60 * 1000,
        flags: ['jest'],
        url: 'https://jestjs.io/',
      },
      on: false,
    };

    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
    // @ts-ignore
    global.fetch = jest.fn(() =>
      Promise.resolve({
        json: () =>
          Promise.resolve({
            data: {
              flags: previous.issue?.flags,
              url: previous.issue?.url,
            },
            success: true,
          }),
        status: 200,
      })
    );

    await chrome.storage.local.set({ 'example.com': previous });
    await handler({ ...req, body }, res);

    expect(chrome.storage.local.get).toHaveBeenCalledWith('example.com');
    expect(global.fetch).toHaveBeenCalledWith(`${API_URL}/issues/example.com/`);
    expect(chrome.storage.local.set).toHaveBeenCalledWith({ 'example.com': next });
    expect(res.send).toHaveBeenCalledWith({ data: next, success: true });
  });

  it('should handle rate-limiting gracefully (HTTP 429)', async () => {
    const previous: DomainConfig = {
      issue: {
        expiresAt: Date.now() - 8 * 60 * 60 * 1000,
        flags: ['jest'],
        url: 'https://jestjs.io/',
      },
      on: false,
    };
    const next: DomainConfig = {
      issue: {
        expiresAt: Date.now() + 8 * 60 * 60 * 1000,
        flags: ['jest'],
        url: 'https://jestjs.io/',
      },
      on: false,
    };

    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
    // @ts-ignore
    global.fetch = jest.fn(() =>
      Promise.resolve({
        json: () =>
          Promise.resolve({
            errors: [],
            success: false,
          }),
        status: 429,
      })
    );

    await chrome.storage.local.set({ 'example.com': previous });
    await handler({ ...req, body }, res);

    expect(chrome.storage.local.get).toHaveBeenCalledWith('example.com');
    expect(global.fetch).toHaveBeenCalledWith(`${API_URL}/issues/example.com/`);
    expect(chrome.storage.local.set).not.toHaveBeenCalledWith({ 'example.com': next });
    expect(res.send).toHaveBeenCalledWith({ data: previous, success: true });
  });

  it('should fallback to a 24-hour expiration if API returns non-success response', async () => {
    const previous: DomainConfig = {
      issue: {
        expiresAt: Date.now() - 8 * 60 * 60 * 1000,
        flags: ['jest'],
        url: 'https://jestjs.io/',
      },
      on: false,
    };
    const next: DomainConfig = {
      issue: {
        expiresAt: Date.now() + 24 * 60 * 60 * 1000,
      },
      on: false,
    };

    // eslint-disable-next-line @typescript-eslint/ban-ts-comment
    // @ts-ignore
    global.fetch = jest.fn(() =>
      Promise.resolve({
        json: () =>
          Promise.resolve({
            errors: [],
            success: false,
          }),
        status: 200,
      })
    );

    await chrome.storage.local.set({ 'example.com': previous });
    await handler({ ...req, body }, res);

    expect(chrome.storage.local.get).toHaveBeenCalledWith('example.com');
    expect(global.fetch).toHaveBeenCalledWith(`${API_URL}/issues/example.com/`);
    expect(chrome.storage.local.set).toHaveBeenCalledWith({ 'example.com': next });
    expect(res.send).toHaveBeenCalledWith({ data: next, success: true });
  });
});