import { expect, test, type Page } from '@playwright/test'
import assert from 'assert'
import os from 'os'
import * as actions from './actions'
import * as customExpect from './customExpect'
import * as locate from './locate'

const ACCEPT_SUGGESTION_SHORTCUT = os.platform() === 'darwin' ? 'Meta+Enter' : 'Control+Enter'

async function deselectAllNodes(page: Page) {
  await page.keyboard.press('Escape')
  await expect(page.locator('.GraphNode.selected')).toHaveCount(0)
}

test('Different ways of opening Component Browser', async ({ page }) => {
  await actions.goToGraph(page)
  const nodeCount = await locate.graphNode(page).count()

  async function expectAndCancelBrowser(expectedInput: string) {
    await customExpect.toExist(locate.componentBrowser(page))
    await customExpect.toExist(locate.componentBrowserEntry(page))
    await expect(locate.componentBrowserInput(page).locator('input')).toHaveValue(expectedInput)
    await page.keyboard.press('Escape')
    await expect(locate.componentBrowser(page)).not.toBeVisible()
    await expect(locate.graphNode(page)).toHaveCount(nodeCount)
  }

  // Without source node

  // (+) button
  await locate.addNewNodeButton(page).click()
  await expectAndCancelBrowser('')
  // Enter key
  await locate.graphEditor(page).press('Enter')
  await expectAndCancelBrowser('')

  // With source node

  // (+) button
  await locate.graphNodeByBinding(page, 'final').click()
  await locate.addNewNodeButton(page).click()
  await expectAndCancelBrowser('final.')
  // Enter key
  await locate.graphNodeByBinding(page, 'final').click()
  await locate.graphEditor(page).press('Enter')
  await expectAndCancelBrowser('final.')
  // Dragging out an edge
  // `click` method of locator could be simpler, but `position` option doesn't work.
  const outputPortArea = await locate
    .graphNodeByBinding(page, 'final')
    .locator('.outputPortHoverArea')
    .boundingBox()
  assert(outputPortArea)
  const outputPortX = outputPortArea.x + outputPortArea.width / 2.0
  const outputPortY = outputPortArea.y + outputPortArea.height - 2.0
  await page.mouse.click(outputPortX, outputPortY)
  await page.mouse.click(40, 300)
  await expectAndCancelBrowser('final.')
  // Double-clicking port
  // TODO[ao] Without timeout, even the first click would be treated as double due to previous
  // event. Probably we need a better way to simulate double clicks.
  await page.waitForTimeout(600)
  await page.mouse.click(outputPortX, outputPortY)
  await page.mouse.click(outputPortX, outputPortY)
  await expectAndCancelBrowser('final.')
})

test('Accepting suggestion', async ({ page }) => {
  // Clicking enry
  await actions.goToGraph(page)
  await locate.addNewNodeButton(page).click()
  let nodeCount = await locate.graphNode(page).count()
  await locate.componentBrowserEntry(page).nth(1).click()
  await expect(locate.componentBrowser(page)).not.toBeVisible()
  await expect(locate.graphNode(page)).toHaveCount(nodeCount + 1)
  await expect(locate.graphNode(page).last().locator('.WidgetToken')).toHaveText([
    'Data',
    '.',
    'read_text',
  ])
  await customExpect.toBeSelected(locate.graphNode(page).last())

  // Clicking at highlighted entry
  nodeCount = await locate.graphNode(page).count()
  await deselectAllNodes(page)
  await locate.addNewNodeButton(page).click()
  await locate.componentBrowserSelectedEntry(page).first().click()
  await expect(locate.componentBrowser(page)).not.toBeVisible()
  await expect(locate.graphNode(page)).toHaveCount(nodeCount + 1)
  await expect(locate.graphNode(page).last().locator('.WidgetToken')).toHaveText([
    'Data',
    '.',
    'read',
  ])
  await customExpect.toBeSelected(locate.graphNode(page).last())

  // Accepting with Enter
  nodeCount = await locate.graphNode(page).count()
  await deselectAllNodes(page)
  await locate.addNewNodeButton(page).click()
  await page.keyboard.press('Enter')
  await expect(locate.componentBrowser(page)).not.toBeVisible()
  await expect(locate.graphNode(page)).toHaveCount(nodeCount + 1)
  await expect(locate.graphNode(page).last().locator('.WidgetToken')).toHaveText([
    'Data',
    '.',
    'read',
  ])
  await customExpect.toBeSelected(locate.graphNode(page).last())
})

test('Accepting any written input', async ({ page }) => {
  await actions.goToGraph(page)
  await locate.addNewNodeButton(page).click()
  const nodeCount = await locate.graphNode(page).count()
  await locate.componentBrowserInput(page).locator('input').fill('re')
  await page.keyboard.press(ACCEPT_SUGGESTION_SHORTCUT)
  await expect(locate.componentBrowser(page)).not.toBeVisible()
  await expect(locate.graphNode(page)).toHaveCount(nodeCount + 1)
  await expect(locate.graphNode(page).last().locator('.WidgetToken')).toHaveText('re')
})

test('Filling input with suggestions', async ({ page }) => {
  await actions.goToGraph(page)
  await locate.addNewNodeButton(page).click()

  // Entering module
  await locate.componentBrowserEntryByLabel(page, 'Standard.Base.Data').click()
  await customExpect.toExist(locate.componentBrowser(page))
  await expect(locate.componentBrowserInput(page).locator('input')).toHaveValue(
    'Standard.Base.Data.',
  )

  // Applying suggestion
  page.keyboard.press('Tab')
  await customExpect.toExist(locate.componentBrowser(page))
  await expect(locate.componentBrowserInput(page).locator('input')).toHaveValue(
    'Standard.Base.Data.read ',
  )
})

test('Filtering list', async ({ page }) => {
  await actions.goToGraph(page)
  await locate.addNewNodeButton(page).click()
  await locate.componentBrowserInput(page).locator('input').fill('re_te')
  const segments = locate.componentBrowserEntry(page).locator('.component-label-segment')
  await expect(segments).toHaveText(['Data.', 're', 'ad', '_te', 'xt'])
  const highlighted = locate.componentBrowserEntry(page).locator('.component-label-segment.match')
  await expect(highlighted).toHaveText(['re', '_te'])
})