import { afterEach, describe, expect, it } from 'vitest'
import { act } from 'react'
import { byId, setup } from './harness'
import type { Harness } from './harness'

let h: Harness
afterEach(() => h?.cleanup())

const q = (sel: string) => h.shadow.querySelector<HTMLElement>(sel)!
const qa = (sel: string) => [...h.shadow.querySelectorAll<HTMLElement>(sel)]
const kids = (id: string) => h.cms.graph.children(id).map((e) => e.to)
const setInput = async (el: HTMLInputElement, v: string) => {
  const set = Object.getOwnPropertyDescriptor(HTMLInputElement.prototype, 'value')!.set!
  await act(async () => {
    set.call(el, v)
    el.dispatchEvent(new Event('input', { bubbles: true }))
  })
  await h.settle()
}

describe('node search (existing nodes, type filter)', () => {
  it('lists nodes and filters by type and text', async () => {
    h = await setup()
    await h.settle()
    const all = await h.editor.ctrl.api.searchNodes({})
    expect(all.total).toBeGreaterThan(5)
    expect(all.items.map((n) => n.id)).toContain('orphan1')
    const texts = await h.editor.ctrl.api.searchNodes({ type: 'text' })
    expect(texts.items.length).toBeGreaterThan(0)
    expect(texts.items.every((n) => n.dataType === 'text')).toBe(true)
    const q1 = await h.editor.ctrl.api.searchNodes({ q: 'sparrow' })
    expect(q1.items.map((n) => n.id).sort()).toEqual(['orphan1', 'orphan2'])
    const both = await h.editor.ctrl.api.searchNodes({ type: 'button', q: 'sparrow' })
    expect(both.items.map((n) => n.id)).toEqual(['orphan2'])
  })

  it('the panel shows a Nodes section with a type filter; linking adds a shared block', async () => {
    h = await setup()
    await h.settle()
    await h.press('Panel')
    await h.settle()
    await h.settle()
    expect(q('[aria-label="Search nodes"]')).not.toBeNull()
    expect(q('[aria-label="Filter by type"]')).not.toBeNull()
    const rows = () => qa('.cms-noderow')
    expect(rows().length).toBeGreaterThan(0)
    await setInput(q('[aria-label="Search nodes"]') as HTMLInputElement, 'sparrow')
    await new Promise((r) => setTimeout(r, 400)) // search debounce (bare: act() holds component timers)
    await h.settle()
    expect(qa('.cms-noderow').map((r) => r.getAttribute('title'))).toEqual([expect.stringContaining('orphan1'), expect.stringContaining('orphan2')])
    // filter to buttons: only orphan2 stays
    const sel = q('[aria-label="Filter by type"]') as HTMLSelectElement
    await act(async () => {
      sel.value = 'button'
      sel.dispatchEvent(new Event('change', { bubbles: true }))
    })
    await new Promise((r) => setTimeout(r, 400)) // debounce again (bare: act() holds component timers)
    await h.settle()
    expect(qa('.cms-noderow').map((r) => r.getAttribute('title'))).toEqual([expect.stringContaining('orphan2')])
    // link it after the selected block: select t2 (child of s2), link lands in s2
    await act(async () => void byId('t2').dispatchEvent(new MouseEvent('click', { bubbles: true, cancelable: true, composed: true })))
    await h.settle()
    const before = kids('s2')
    await act(async () => void qa('.cms-noderow button')[0].click())
    await h.settle()
    await h.settle()
    expect(kids('s2')).toHaveLength(before.length + 1)
    expect(h.cms.graph.node('orphan2')).toBeDefined() // shared: the node itself survives
  })
})

describe('slots / dropzones (x-graph.connections)', () => {
  it('section exposes its sidebar slot; plain children still win when they accept the type', async () => {
    h = await setup()
    await h.settle()
    await h.editor.ctrl.fillHandles()
    const slots = h.editor.ctrl.slotsFor('s1')
    expect(slots.map((s) => s.name)).toEqual(['sidebar'])
    expect(slots[0].def.to).toEqual(['text', 'button', 'footer'])
    expect(h.editor.ctrl.acceptsInSlot('s1', 'sidebar', 'footer')).toBe(true)
    expect(h.editor.ctrl.acceptsInSlot('s1', 'sidebar', 'section')).toBe(false)
    expect(h.editor.ctrl.acceptsInSlot('s1', 'nope', 'text')).toBe(false)
    // footer fits no plain-children rule, so drops resolve to the slot
    expect(h.editor.ctrl.handleForDrop('s1', 'footer')).toBe('sidebar')
    // heading fits plain children: no slot needed
    expect(h.editor.ctrl.handleForDrop('s1', 'heading')).toBeUndefined()
  })

  it('inserting into a slot lands the block there and the outline shows it grouped', async () => {
    h = await setup()
    await h.settle()
    const res = await h.editor.ctrl.insertIntoSlot('s1', 'sidebar', 'footer', 0)
    expect(res).not.toBeNull()
    await h.settle()
    await h.editor.ctrl.fillHandles()
    await h.settle()
    expect(h.editor.ctrl.handleOf(res!.results[0].node!)).toBe('sidebar')
    expect(h.editor.ctrl.slotChildren('s1', 'sidebar').map((b) => b.id)).toEqual([res!.results[0].node!])
    await h.press('Panel')
    await h.settle()
    const heads = qa('.cms-oslot__head').map((x) => x.textContent)
    expect(heads.some((t) => t!.includes('sidebar'))).toBe(true)
  })

  it('linking an existing node into a slot shares it (no copy)', async () => {
    h = await setup()
    await h.settle()
    const res = await h.editor.ctrl.linkExisting('s1', 'orphan1', { handle: 'sidebar' })
    expect(res).not.toBeNull()
    expect(kids('s1')).toContain('orphan1')
    await h.editor.ctrl.fillHandles()
    expect(h.editor.ctrl.handleOf('orphan1')).toBe('sidebar')
    // still reachable as its own node (shared, not copied)
    expect(h.cms.graph.node('orphan1').data.body).toContain('sparrows')
  })

  it('outline drops commit through the same engine: reorder, insert, link', async () => {
    h = await setup()
    await h.settle()
    const line = { x: 0, y: 0, w: 0, h: 0 }
    // reorder b1 before h1 within s1
    await h.editor.ctrl.dropBlock('b1', { parentId: 's1', index: 0, line })
    expect(kids('s1')).toEqual(['b1', 'h1', 't1'])
    // insert a new heading at index 1
    await h.editor.ctrl.dropNew({ parentId: 's1', index: 1, line }, { type: 'heading' })
    expect(kids('s1')).toHaveLength(4)
    expect(h.cms.graph.node(kids('s1')[1]).dataType).toBe('heading')
    // link the orphan into the sidebar slot
    await h.editor.ctrl.dropExisting({ parentId: 's1', handle: 'sidebar', index: 0, line }, 'orphan2')
    await h.editor.ctrl.fillHandles()
    expect(h.editor.ctrl.handleOf('orphan2')).toBe('sidebar')
  })

  it('the slot add button opens an insert picker limited to the slot types', async () => {
    h = await setup()
    await h.settle()
    await h.press('Panel')
    await h.settle()
    await h.settle()
    const add = qa('[aria-label="Add to sidebar"]')
    expect(add.length).toBeGreaterThan(0)
    await act(async () => void add[0].click())
    await h.settle()
    await h.settle()
    const tiles = qa('.cms-dialog .cms-tile').map((x) => x.getAttribute('data-type'))
    expect(tiles.sort()).toEqual(['button', 'footer', 'text'])
    await act(async () => void q('.cms-dialog .cms-tile[data-type="footer"]').click())
    await h.settle()
    await h.editor.ctrl.fillHandles()
    const footers = h.editor.ctrl.slotChildren('s1', 'sidebar')
    expect(footers).toHaveLength(1)
    expect(h.cms.graph.node(footers[0].id).dataType).toBe('footer')
  })
})