import { render, screen } from '@testing-library/react';
import { describe, it, expect, vi, beforeEach } from 'vitest';
import DailySummary from '../../../../src/components/stats/DailySummary';
import { useStats } from '../../../../src/hooks/useStats';
import { XAxis, Tooltip } from 'recharts';
import { formatMinutes } from '../../../../src/utils/time';

vi.mock('../../../../src/hooks/useStats', () => ({
  useStats: vi.fn(),
}));

vi.mock('recharts', async () => {
  const actual = await vi.importActual<typeof import('recharts')>('recharts');
  return {
    ...actual,
    ResponsiveContainer: ({ children }: any) => <div data-testid="responsive-container">{children}</div>,
    BarChart: ({ children }: any) => <div data-testid="bar-chart">{children}</div>,
    XAxis: vi.fn(({ tickFormatter }) => <div data-testid="x-axis" data-tick-formatter={String(tickFormatter)} />),
    YAxis: vi.fn(() => <div data-testid="y-axis" />),
    CartesianGrid: vi.fn(),
    Tooltip: vi.fn(({ formatter }) => <div data-testid="tooltip" />),
    Bar: vi.fn(),
  };
});

describe('DailySummary', () => {
  const props = {
    from_date: '2024-01-01',
    to_date: '2024-01-02',
    day_start: '07:00',
    day_end: '20:00',
  };

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

  it('renders loading state', () => {
    vi.mocked(useStats).mockReturnValue({
      dailySummary: undefined,
      isLoading: true,
    } as any);

    render(<DailySummary {...props} />);
    expect(screen.getByText(/Loading summary.../i)).toBeInTheDocument();
  });

  it('renders empty state when dailySummary.days is undefined', () => {
    vi.mocked(useStats).mockReturnValue({
      dailySummary: undefined,
      isLoading: false,
    } as any);

    render(<DailySummary {...props} />);
    expect(screen.getByText(/No data available for this period./i)).toBeInTheDocument();
  });

  it('renders empty state when dailySummary.days is an empty array', () => {
    vi.mocked(useStats).mockReturnValue({
      dailySummary: { days: [] },
      isLoading: false,
    } as any);

    render(<DailySummary {...props} />);
    expect(screen.getByText(/No data available for this period./i)).toBeInTheDocument();
  });

  it('renders chart and average stats correctly with multiple days', () => {
    vi.mocked(useStats).mockReturnValue({
      dailySummary: {
        days: [
          { date: '2024-01-01', total_minutes: 480, day_minutes: 240, night_minutes: 240 },
          { date: '2024-01-02', total_minutes: 540, day_minutes: 300, night_minutes: 240 },
        ],
      },
      isLoading: false,
    } as any);

    render(<DailySummary {...props} />);
    
    expect(screen.getByText(/Daily Summary/i)).toBeInTheDocument();

    // Totals: (480 + 540) / 2 = 510 mins -> 8h 30m
    // Day: (240 + 300) / 2 = 270 mins -> 4h 30m
    // Night: (240 + 240) / 2 = 240 mins -> 4h 0m
    expect(screen.getByText(/8h 30m/i)).toBeInTheDocument();
    expect(screen.getByText(/4h 30m/i)).toBeInTheDocument();
    expect(screen.getByText(/4h 0m/i)).toBeInTheDocument();
  });

  it('handles single day data correctly', () => {
    vi.mocked(useStats).mockReturnValue({
      dailySummary: {
        days: [
          { date: '2024-01-01', total_minutes: 600, day_minutes: 300, night_minutes: 300 },
        ],
      },
      isLoading: false,
    } as any);

    render(<DailySummary {...props} />);
    
    expect(screen.getByText(/10h 0m/i)).toBeInTheDocument();
    const avgTimes = screen.getAllByText(/5h 0m/i);
    expect(avgTimes).toHaveLength(2);
  });

  it('uses correct formatters for XAxis and Tooltip', () => {
    vi.mocked(useStats).mockReturnValue({
      dailySummary: {
        days: [
          { date: '2024-01-01', total_minutes: 480, day_minutes: 240, night_minutes: 240 },
        ],
      },
      isLoading: false,
    } as any);

    render(<DailySummary {...props} />);

    // Check XAxis tickFormatter
    const xAxisCall = vi.mocked(XAxis).mock.calls[0][0];
    expect(xAxisCall.tickFormatter).toBeDefined();
    expect(xAxisCall.tickFormatter(10)).toBe('10h');
    expect(xAxisCall.tickFormatter(5.5)).toBe('6h');

    // Check Tooltip formatter
    const tooltipCall = vi.mocked(Tooltip).mock.calls[0][0];
    expect(tooltipCall.formatter).toBeDefined();

    // Test Tooltip formatter with a single number (e.g., daySleep)
    const [val1, name1] = tooltipCall.formatter(8, 'daySleep');
    expect(val1).toBe('8h 0m');
    expect(name1).toBe('Day');

    const [val2, name2] = tooltipCall.formatter(7, 'nightSleep');
    expect(val2).toBe('7h 0m');
    expect(name2).toBe('Night');

    // Test Tooltip formatter with an array
    const [val3, name3] = tooltipCall.formatter([10], 'daySleep');
    expect(val3).toBe('10h 0m');
    expect(name3).toBe('Day');

    // Test Tooltip formatter with undefined/null
    const [val4, name4] = tooltipCall.formatter(undefined, 'daySleep');
    expect(val4).toBe('0m');
    expect(name4).toBe('Day');
  });
});