import { http, HttpResponse } from 'msw'
import { test, expect } from './msw-setup'

const fullEvent = {
  eventToken: 'a1b2c3d4-e5f6-7890-abcd-ef1234567890',
  title: 'Summer BBQ',
  description: 'Bring your own drinks!',
  dateTime: '2026-03-15T20:00:00+01:00',
  timezone: 'Europe/Berlin',
  location: 'Central Park, NYC',
  attendeeCount: 12,
  expired: false,
}

test.describe('US-1: View event details', () => {
  test('displays all event fields for a valid event', async ({ page, network }) => {
    network.use(
      http.get('*/api/events/:token', () => {
        return HttpResponse.json(fullEvent)
      }),
    )

    await page.goto(`/events/${fullEvent.eventToken}`)

    await expect(page.getByRole('heading', { name: 'Summer BBQ' })).toBeVisible()
    await expect(page.getByText('Bring your own drinks!')).toBeVisible()
    await expect(page.getByText('Central Park, NYC')).toBeVisible()
    await expect(page.getByText('12')).toBeVisible()
    await expect(page.getByText('Europe/Berlin')).toBeVisible()
    await expect(page.getByText('2026')).toBeVisible()
  })

  test('does not load external resources', async ({ page, network }) => {
    const externalRequests: string[] = []
    page.on('request', (req) => {
      const url = new URL(req.url())
      if (!['localhost', '127.0.0.1'].includes(url.hostname)) {
        externalRequests.push(req.url())
      }
    })

    network.use(
      http.get('*/api/events/:token', () => {
        return HttpResponse.json(fullEvent)
      }),
    )

    await page.goto(`/events/${fullEvent.eventToken}`)
    await expect(page.getByRole('heading', { name: 'Summer BBQ' })).toBeVisible()

    expect(externalRequests).toEqual([])
  })
})

test.describe('US-2: View expired event', () => {
  test('shows "event has ended" banner for expired event', async ({ page, network }) => {
    network.use(
      http.get('*/api/events/:token', () => {
        return HttpResponse.json({ ...fullEvent, expired: true })
      }),
    )

    await page.goto(`/events/${fullEvent.eventToken}`)

    await expect(page.getByText('This event has ended.')).toBeVisible()
  })
})

test.describe('US-4: Event not found', () => {
  test('shows "event not found" for unknown token', async ({ page, network }) => {
    network.use(
      http.get('*/api/events/:token', () => {
        return HttpResponse.json(
          { type: 'urn:problem-type:event-not-found', title: 'Event Not Found', status: 404, detail: 'Event not found.' },
          { status: 404, headers: { 'Content-Type': 'application/problem+json' } },
        )
      }),
    )

    await page.goto('/events/00000000-0000-0000-0000-000000000000')

    await expect(page.getByText('Event not found.')).toBeVisible()
    // No event data visible
    await expect(page.locator('.detail__title')).not.toBeVisible()
  })
})

test.describe('Server error', () => {
  test('shows error message and retry button on 500', async ({ page, network }) => {
    network.use(
      http.get('*/api/events/:token', () => {
        return HttpResponse.json(
          { type: 'about:blank', title: 'Internal Server Error', status: 500, detail: 'An unexpected error occurred.' },
          { status: 500, headers: { 'Content-Type': 'application/problem+json' } },
        )
      }),
    )

    await page.goto(`/events/${fullEvent.eventToken}`)

    await expect(page.getByText('Something went wrong.')).toBeVisible()
    await expect(page.getByRole('button', { name: 'Retry' })).toBeVisible()
  })

  test('retry button re-fetches the event', async ({ page, network }) => {
    let callCount = 0
    network.use(
      http.get('*/api/events/:token', () => {
        callCount++
        if (callCount === 1) {
          return HttpResponse.json(
            { type: 'about:blank', title: 'Error', status: 500 },
            { status: 500, headers: { 'Content-Type': 'application/problem+json' } },
          )
        }
        return HttpResponse.json(fullEvent)
      }),
    )

    await page.goto(`/events/${fullEvent.eventToken}`)
    await expect(page.getByText('Something went wrong.')).toBeVisible()

    await page.getByRole('button', { name: 'Retry' }).click()

    await expect(page.getByRole('heading', { name: 'Summer BBQ' })).toBeVisible()
  })
})