import test from 'node:test'
import assert from 'node:assert/strict'
import { readFile } from 'node:fs/promises'

const source = await readFile(new URL('../utils/picking-state.js', import.meta.url), 'utf8')
const state = await import(`data:text/javascript;base64,${Buffer.from(source).toString('base64')}`)

const items = [{ id: 1 }, { id: 2 }, { id: 3 }]

test('createItemStates initializes every item as pending', () => {
  assert.deepEqual(state.createItemStates(items), {
    1: state.ITEM_STATUS.PENDING,
    2: state.ITEM_STATUS.PENDING,
    3: state.ITEM_STATUS.PENDING,
  })
})

test('getPickSummary disables submit before any effective pick', () => {
  const summary = state.getPickSummary(items, {
    1: state.ITEM_STATUS.SKIPPED,
    2: state.ITEM_STATUS.PENDING,
    3: state.ITEM_STATUS.PENDING,
  })

  assert.equal(summary.canSubmit, false)
  assert.equal(summary.buttonText, '提交拣货完成')
  assert.equal(summary.progress, 33)
})

test('getPickSummary enables early submit after a picked item', () => {
  const summary = state.getPickSummary(items, {
    1: state.ITEM_STATUS.PICKED,
    2: state.ITEM_STATUS.PENDING,
    3: state.ITEM_STATUS.PENDING,
  })

  assert.equal(summary.canSubmit, true)
  assert.equal(summary.buttonText, '提交拣货完成')
  assert.deepEqual(
    { picked: summary.picked, partial: summary.partial, skipped: summary.skipped, pending: summary.pending },
    { picked: 1, partial: 0, skipped: 0, pending: 2 },
  )
})

test('getPickSummary enables submit when every item is processed', () => {
  const summary = state.getPickSummary(items, {
    1: state.ITEM_STATUS.SKIPPED,
    2: state.ITEM_STATUS.SKIPPED,
    3: state.ITEM_STATUS.SKIPPED,
  })

  assert.equal(summary.canSubmit, true)
  assert.equal(summary.buttonText, '提交拣货完成')
  assert.equal(summary.progress, 100)
})

test('submitStates turns only pending items into skipped', () => {
  assert.deepEqual(state.submitStates(items, {
    1: state.ITEM_STATUS.PICKED,
    2: state.ITEM_STATUS.PARTIAL,
    3: state.ITEM_STATUS.PENDING,
  }), {
    states: {
      1: state.ITEM_STATUS.PICKED,
      2: state.ITEM_STATUS.PARTIAL,
      3: state.ITEM_STATUS.SKIPPED,
    },
    autoSkippedIds: [3],
  })
})

test('classifyScan distinguishes pending, repeated, and unknown carton codes', () => {
  const scanItems = [{ id: 1, boxCodes: ['BOX-001'] }, { id: 2, boxCodes: ['BOX-002', 'BOX-003'] }]

  assert.deepEqual(state.classifyScan(scanItems, {
    1: state.ITEM_STATUS.PICKED,
    2: state.ITEM_STATUS.PENDING,
  }, 'BOX-002'), {
    type: 'pending',
    item: scanItems[1],
  })
  assert.deepEqual(state.classifyScan(scanItems, {
    1: state.ITEM_STATUS.PARTIAL,
    2: state.ITEM_STATUS.PENDING,
  }, 'BOX-001', { 'BOX-001': 1 }), {
    type: 'processed',
    item: scanItems[0],
    status: state.ITEM_STATUS.PARTIAL,
  })
  assert.deepEqual(state.classifyScan(scanItems, {}, 'NO-SUCH-BOX'), {
    type: 'unknown',
    item: null,
  })
})