import test from 'node:test'
import assert from 'node:assert/strict'
import { readFileSync } from 'node:fs'
import vm from 'node:vm'
import { parse, compileScript, compileTemplate } from 'vue/compiler-sfc'

const filename = 'src/components/ReturnBoxMergeWork.vue'
const source = readFileSync(new URL('../' + filename, import.meta.url), 'utf8')
const { descriptor } = parse(source)
test('box merge component compiles both its script and template', () => {
  compileScript(descriptor, { id: 'box-merge' })
  assert.deepEqual(compileTemplate({ source: descriptor.template.content, filename, id: 'box-merge' }).errors, [])
})
function instance() {
  const boxes = [{cartonMark:'A',customerId:'C1',items:[{skuCode:'SKU1',quantity:2},{skuCode:'SKU2',quantity:3}]},{cartonMark:'B',customerId:'C1',items:[{skuCode:'SKU1',quantity:2}]}]
  const component = vm.runInNewContext(descriptor.script.content.replace(/^import .*$/gm, '').replace('export default', 'component ='), { ScanTargetInput: {}, ReturnLabelConfirmation: {}, component: null, scanReturnCarton: async mark => boxes.find(box => box.cartonMark === mark) })
  const work = { ...component.data(), plan: {customerId:'C1',sources:[{cartonMark:'A',items:[{skuCode:'SKU1',quantity:2},{skuCode:'SKU2',quantity:3}]},{cartonMark:'B',items:[{skuCode:'SKU1',quantity:2}]}]}, $emit(){} }
  for (const [name, method] of Object.entries(component.methods)) work[name] = method.bind(work)
  work.save = () => {}
  return {work,component}
}
test('new plan requires scanning each source and preserves locked SKU quantities', async () => {
  const {work,component}=instance(); work.choose('NEW')
  assert.equal(work.sources.length,0)
  assert.equal(work.active,'source')
  await work.acceptScan('A'); await work.acceptScan('B')
  work.setDeduction('A','SKU1',1); work.setDeduction('A','SKU2',2); work.setDeduction('B','SKU1',2)
  work.dimensions={length:10,width:20,height:30,weight:1}
  assert.equal(work.sources.length,2)
  assert.equal(work.plannedItems().reduce((sum,item)=>sum+item.quantity,0),7)
  assert.equal(component.computed.canComplete.call(work),true)
})

test('planned source carton marks are visible before scanning', () => {
  const {work, component} = instance()
  work.plan = { sourceCartonMarks: ['A', 'B'], sources: [] }
  assert.deepEqual(component.computed.plannedSourceRows.call(work).map(box => box.cartonMark), ['A', 'B'])
})
test('existing box uses another box as target and never removes target inventory', async () => {
  const {work,component}=instance(); work.choose('EXISTING'); await work.scanSource('A'); await work.scanTarget('B')
  assert.equal(work.target.cartonMark,'B'); assert.equal(work.sources.length,1)
  work.setDeduction('A','SKU1',1)
  assert.equal(work.plannedItems().length,2)
  assert.equal(work.target.items[0].quantity,2)
  assert.equal(component.computed.canComplete.call(work),true)
  work.choose('NEW'); assert.equal(work.target,null); assert.equal(work.sources.length,0)
  assert.equal(work.plannedItems().length,0)
})

test('existing source can be replaced before merging, echoing the mark and clearing old deductions and target', async () => {
  const {work,component}=instance()
  work.plan=null
  work.choose('EXISTING'); await work.scanSource('A'); await work.scanTarget('B')
  work.setDeduction('A','SKU1',1)
  assert.equal(work.sourceCode,'A')
  work.sourceCode='B'
  assert.equal(component.computed.canComplete.call(work),false)
  await work.scanSource('B')
  assert.equal(work.sources.length,1)
  assert.equal(work.sources[0].cartonMark,'B')
  assert.equal(work.sourceCode,'B')
  assert.equal(work.target,null)
  assert.equal(work.targetCode,'')
  assert.equal(work.plannedItems().length,0)
  await work.scanTarget('A'); work.setDeduction('B','SKU1',1)
  assert.equal(component.computed.canComplete.call(work),true)
})

test('BOX plan requires every source and accumulates multiple scanned sources', async () => {
  const {work,component}=instance()
  work.plan.mode='BOX'
  work.plan.sources.push({cartonMark:'C',items:[{skuCode:'SKU1',quantity:4}]})
  work.choose('EXISTING'); await work.scanSource('A'); await work.scanTarget('B')
  assert.equal(component.computed.canComplete.call(work),false)
  await work.scanSource('C')
  assert.equal(work.sources.length,2)
  assert.equal(component.computed.canComplete.call(work),true)
  assert.equal(work.plannedItems().reduce((sum,item)=>sum+item.quantity,0),9)
})

test('a directly scanned box survives switching between existing and new targets', async () => {
  const {work}=instance()
  const box=work.plan.sources[0];work.plan=null;work.initialSource=box
  work.choose('EXISTING')
  assert.equal(work.sources[0].cartonMark,'A');assert.equal(work.sourceCode,'A')
  work.choose('NEW')
  assert.equal(work.sources[0].items.length,2)
  work.choose('EXISTING')
  assert.equal(work.sourceCode,'A');assert.equal(work.active,'target')
})