// @vitest-environment jsdom
import React from 'react';
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { act, render, waitFor } from '@testing-library/react';
import AgentScheduleView from '../src/components/schedule/AgentScheduleView';

const calendarSpy = vi.fn();

vi.mock('next/dynamic', () => ({
  default: () => (props: any) => {
    calendarSpy(props);
    return <div data-testid="calendar" />;
  }
}));

const getScheduleEntries = vi.fn();
vi.mock('@alga-psa/scheduling/actions', () => ({
  getScheduleEntries,
}));

const getCurrentUser = vi.fn();
const getCurrentUserPermissions = vi.fn();
vi.mock('@alga-psa/users/actions', () => ({
  getCurrentUser,
  getCurrentUserPermissions,
}));

const useUsers = vi.fn(() => ({ users: [] }));
vi.mock('@alga-psa/users/hooks', () => ({
  useUsers,
}));

const entryPopupSpy = vi.fn();
vi.mock('../src/components/schedule/EntryPopup', () => ({
  default: (props: any) => {
    entryPopupSpy(props);
    return <div data-testid="entry-popup" />;
  },
}));

vi.mock('../src/components/schedule/CalendarStyleProvider', () => ({
  CalendarStyleProvider: () => <div data-testid="calendar-style-provider" />,
}));

vi.mock('../src/components/schedule/AgentScheduleDrawerStyles', () => ({
  AgentScheduleDrawerStyles: () => <div data-testid="agent-drawer-styles" />,
}));

beforeEach(() => {
  calendarSpy.mockClear();
  getScheduleEntries.mockResolvedValue({ success: true, entries: [] });
  getCurrentUser.mockResolvedValue({ user_id: 'user-1' });
  getCurrentUserPermissions.mockResolvedValue(['user_schedule:read:all']);
});

describe('AgentScheduleView', () => {
  it('renders without error for a valid agent', () => {
    const { getByTestId } = render(<AgentScheduleView agentId="agent-1" />);
    expect(getByTestId('calendar')).toBeTruthy();
  });

  it('calls getScheduleEntries with the agent ID and date range', async () => {
    render(<AgentScheduleView agentId="agent-1" />);

    await waitFor(() => expect(getScheduleEntries).toHaveBeenCalled());

    const [start, end, technicianIds] = getScheduleEntries.mock.calls[0];
    expect(technicianIds).toEqual(['agent-1']);
    expect(start).toBeInstanceOf(Date);
    expect(end).toBeInstanceOf(Date);
    expect((end as Date).getTime()).toBeGreaterThan((start as Date).getTime());
  });

  it('shows a loading state while fetching events', async () => {
    let resolvePromise: (value: any) => void = () => {};
    const pending = new Promise((resolve) => {
      resolvePromise = resolve as (value: any) => void;
    });
    getScheduleEntries.mockReturnValueOnce(pending);

    const { getByText } = render(<AgentScheduleView agentId="agent-1" />);
    expect(getByText(/Loading/i)).toBeTruthy();

    resolvePromise({ success: true, entries: [] });
  });

  it('defaults to week view', () => {
    render(<AgentScheduleView agentId="agent-1" />);
    const props = calendarSpy.mock.calls[0][0];
    expect(props.defaultView).toBe('week');
    expect(props.view).toBe('week');
  });

  it('allows switching between day, week, and month views', () => {
    render(<AgentScheduleView agentId="agent-1" />);
    const initialProps = calendarSpy.mock.calls[0][0];

    act(() => {
      initialProps.onView('day');
    });

    const dayProps = calendarSpy.mock.calls.at(-1)[0];
    expect(dayProps.view).toBe('day');

    act(() => {
      dayProps.onView('month');
    });

    const monthProps = calendarSpy.mock.calls.at(-1)[0];
    expect(monthProps.view).toBe('month');
  });

  it('applies work item colors to events', () => {
    render(<AgentScheduleView agentId="agent-1" />);
    const props = calendarSpy.mock.calls[0][0];
    const result = props.eventPropGetter({ work_item_type: 'ticket' });

    expect(result.style.backgroundColor).toBe('rgb(var(--color-primary-200))');
  });

  it('opens EntryPopup when an event is clicked', () => {
    const { getByTestId } = render(<AgentScheduleView agentId="agent-1" />);
    const props = calendarSpy.mock.calls[0][0];

    act(() => {
      props.onSelectEvent({
        entry_id: 'entry-1',
        scheduled_start: new Date(),
        scheduled_end: new Date(),
        work_item_type: 'ticket',
        assigned_user_ids: [],
      });
    });

    expect(getByTestId('entry-popup')).toBeTruthy();
  });

  it('sets scrollToTime to 8 AM', () => {
    render(<AgentScheduleView agentId="agent-1" />);
    const props = calendarSpy.mock.calls[0][0];
    const scrollToTime = props.scrollToTime as Date;

    expect(scrollToTime.getHours()).toBe(8);
    expect(scrollToTime.getMinutes()).toBe(0);
  });

  it('restricts users with user_schedule:read to their own schedule', async () => {
    getCurrentUser.mockResolvedValueOnce({ user_id: 'user-1' });
    getCurrentUserPermissions.mockResolvedValueOnce(['user_schedule:read']);

    const { getByText } = render(<AgentScheduleView agentId="user-2" />);

    await waitFor(() => expect(getByText(/permission/i)).toBeTruthy());
    expect(getScheduleEntries).not.toHaveBeenCalled();
  });

  it('allows users with user_schedule:read:all to view any agent', async () => {
    getCurrentUser.mockResolvedValueOnce({ user_id: 'user-1' });
    getCurrentUserPermissions.mockResolvedValueOnce(['user_schedule:read:all']);

    render(<AgentScheduleView agentId="user-2" />);

    await waitFor(() => expect(getScheduleEntries).toHaveBeenCalled());
    const [, , technicianIds] = getScheduleEntries.mock.calls[0];
    expect(technicianIds).toEqual(['user-2']);
  });

  it('renders CalendarStyleProvider and AgentScheduleDrawerStyles', () => {
    const { getByTestId } = render(<AgentScheduleView agentId="agent-1" />);
    expect(getByTestId('calendar-style-provider')).toBeTruthy();
    expect(getByTestId('agent-drawer-styles')).toBeTruthy();
  });
});