import { test } from 'node:test'
import assert from 'node:assert/strict'
import { createMockFacade } from '../src/facade/mockFacade'

test('facade exposes a stable initial document projection', () => {
  const facade = createMockFacade()
  const state = facade.getState()
  assert.equal(state.apiVersion, '0.1')
  assert.equal(state.document.id, 'doc-pump-housing')
  assert.equal(state.document.tree.find((item) => item.id === 'body')?.type, 'body')
  assert.equal(facade.gui.workbench.getActive(), 'Part Design')
})

test('workbench and selection changes are event driven', () => {
  const facade = createMockFacade()
  const events: string[] = []
  const unsubscribe = facade.subscribe((event) => events.push(event.type))
  facade.gui.workbench.setActive('Sketcher')
  facade.selection.select('sketch')
  unsubscribe()
  assert.equal(facade.getState().activeWorkbench, 'Sketcher')
  assert.equal(facade.selection.getObjectId(), 'sketch')
  assert.ok(events.includes('state.changed'))
  assert.ok(events.includes('notice'))
})

test('commands and tasks preserve apply/cancel lifecycle', () => {
  const facade = createMockFacade()
  facade.gui.command.execute({ commandId: 'create-sketch' })
  assert.equal(facade.task.getActive()?.status, 'preview')
  facade.task.update({ support: 'XY_Plane' })
  assert.equal(facade.task.getActive()?.draft.support, 'XY_Plane')
  facade.task.cancel()
  assert.equal(facade.task.getActive()?.status, 'cancelled')
})

test('disabled commands return a reason instead of mutating the document', () => {
  const facade = createMockFacade()
  const before = facade.getState().document.version
  const state = facade.gui.command.getState('pad')
  assert.equal(state.status, 'enabled')
  facade.selection.clear()
  facade.gui.workbench.setActive('Sketcher')
  const disabled = facade.gui.command.getState('pad')
  assert.equal(disabled.status, 'disabled')
  assert.match(disabled.reason || '', /Part Design|compatible object/)
  facade.gui.command.execute({ commandId: 'pad' })
  assert.equal(facade.getState().diagnostics.at(-1)?.code, 'COMMAND_DISABLED')
  assert.equal(facade.getState().document.version, before)
})

test('command events carry a document-scoped request context', () => {
  const facade = createMockFacade()
  const events: string[] = []
  let requestId = ''
  facade.subscribe((event) => { events.push(event.type); if (event.type === 'command.started') requestId = event.context.requestId })
  facade.gui.command.execute({ commandId: 'create-sketch' })
  assert.ok(events.includes('command.started'))
  assert.ok(events.includes('command.completed'))
  assert.match(requestId, /^req-/)
})

test('document mutations use the facade history boundary', () => {
  const facade = createMockFacade()
  facade.gui.command.execute({ commandId: 'new-document' })
  assert.equal(facade.app.document.getActive().label, 'Untitled document')
  assert.equal(facade.history.canUndo(), true)
  facade.history.undo()
  assert.equal(facade.app.document.getActive().label, 'Pump Housing')
  assert.equal(facade.history.canRedo(), true)
  facade.history.redo()
  assert.equal(facade.app.document.getActive().label, 'Untitled document')
})