import {
  GUIDE_BANK_CARDS_KEY,
  GUIDE_ONBOARDING_KEY,
  GUIDE_SELECTED_BANK_KEY,
  GUIDE_SELECTED_BRANCH_KEY,
  bankBranches,
  initialBankCards,
  initialOnboarding
} from '../constants/mock'

function formatNow() {
  const now = new Date()
  const pad = (value) => String(value).padStart(2, '0')
  return `${now.getFullYear()}-${pad(now.getMonth() + 1)}-${pad(now.getDate())} ${pad(now.getHours())}:${pad(now.getMinutes())}:${pad(now.getSeconds())}`
}

function maskCard(cardNumber) {
  const digits = String(cardNumber || '').replace(/\D/g, '')
  return `****${digits.slice(-4)}`
}

function readOnboarding() {
  const stored = uni.getStorageSync(GUIDE_ONBOARDING_KEY)
  if (stored && stored.status) {
    return stored
  }
  uni.setStorageSync(GUIDE_ONBOARDING_KEY, { ...initialOnboarding })
  return { ...initialOnboarding }
}

function writeOnboarding(data) {
  uni.setStorageSync(GUIDE_ONBOARDING_KEY, data)
}

function readBankCards() {
  const stored = uni.getStorageSync(GUIDE_BANK_CARDS_KEY)
  if (Array.isArray(stored) && stored.length) {
    return stored
  }
  uni.setStorageSync(GUIDE_BANK_CARDS_KEY, initialBankCards)
  return initialBankCards.slice()
}

function writeBankCards(cards) {
  uni.setStorageSync(GUIDE_BANK_CARDS_KEY, cards)
}

export function getOnboardingStatus() {
  return Promise.resolve(readOnboarding())
}

export function submitOnboarding(payload) {
  const next = {
    status: 'pending',
    reason: '',
    submittedAt: formatNow(),
    payload: payload || {}
  }
  writeOnboarding(next)
  return Promise.resolve(next)
}

export function refreshOnboardingStatus() {
  const current = readOnboarding()
  if (current.status === 'pending') {
    const next = {
      ...current,
      status: 'approved',
      reason: '',
      reviewedAt: formatNow()
    }
    writeOnboarding(next)
    return Promise.resolve(next)
  }
  return Promise.resolve(current)
}

export function getBankCards() {
  return Promise.resolve(readBankCards())
}

export function addBankCard(payload) {
  const cards = readBankCards()
  const created = {
    id: `card_${Date.now()}`,
    bankName: payload.bankName,
    branchName: payload.branchName,
    cardMasked: maskCard(payload.cardNumber),
    status: 'pending',
    reason: ''
  }
  writeBankCards([created, ...cards])
  return Promise.resolve(created)
}

export function searchBankBranches(keyword = '') {
  const query = String(keyword || '').trim()
  const items = bankBranches.filter((item) => {
    if (!query) {
      return true
    }
    return item.bankName.indexOf(query) >= 0 || item.branchName.indexOf(query) >= 0
  })
  return Promise.resolve(items)
}

export function saveSelectedBankId(id) {
  uni.setStorageSync(GUIDE_SELECTED_BANK_KEY, id)
}

export function consumeSelectedBankId() {
  const value = uni.getStorageSync(GUIDE_SELECTED_BANK_KEY)
  if (value) {
    uni.removeStorageSync(GUIDE_SELECTED_BANK_KEY)
  }
  return value || ''
}

export function saveSelectedBranch(branch) {
  uni.setStorageSync(GUIDE_SELECTED_BRANCH_KEY, JSON.stringify(branch))
}

export function consumeSelectedBranch() {
  const stored = uni.getStorageSync(GUIDE_SELECTED_BRANCH_KEY)
  if (!stored) {
    return null
  }
  uni.removeStorageSync(GUIDE_SELECTED_BRANCH_KEY)
  if (typeof stored === 'object') {
    return stored
  }
  try {
    return JSON.parse(stored)
  } catch (error) {
    return {
      branchName: stored,
      bankName: stored,
      branchCode: ''
    }
  }
}