import fs from 'node:fs'
import path from 'node:path'

import { PROJECT_ROOT } from '../../config/runtime.js'

const KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH = path.join(PROJECT_ROOT, 'data', 'kuaishou-cloud-fulfillment.json')

export function getKuaishouCloudFulfillmentFilePath() {
  return KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH
}

export function getKuaishouCloudFulfillmentConfig() {
  return loadKuaishouCloudFulfillmentConfigFromFile()
}

export function saveKuaishouCloudFulfillmentConfig(rawValue) {
  const normalized = normalizeKuaishouCloudFulfillmentConfig(rawValue)
  fs.mkdirSync(path.dirname(KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH), { recursive: true })
  fs.writeFileSync(
    KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH,
    `${JSON.stringify(normalized, null, 2)}\n`,
    'utf8',
  )
  return normalized
}

export function mapKuaishouCloudFulfillmentItemsToBindings(config = {}) {
  const items = Array.isArray(config.items) ? config.items : []

  return items
    .filter((item) => item && item.enabled !== false)
    .map((item) => ({
      provider: String(item.provider || '91kaquan').trim() || '91kaquan',
      platform: String(item.platform || 'kuaishou').trim() || 'kuaishou',
      shopId: String(item.shopId || '').trim(),
      skuCode: String(item.internalSkuCode || '').trim(),
      skuName: String(item.internalSkuName || '').trim(),
      profileKey: 'kuaishou_ct_assisted',
      enabled: item.enabled !== false,
      priority: normalizePriority(item.priority),
      config: {
        flowType: 'kuaishou_cloud_fulfillment',
        configId: String(item.id || '').trim(),
        cloudtentacles: {
          cloudSourceKey: String(item.cloudSourceKey || 'default').trim() || 'default',
          skuId: normalizePositiveInteger(item.cloudSkuId),
          skuName: String(item.cloudSkuName || '').trim(),
          vnKey: '1',
          autoBuyEnabled: item.autoBuyEnabled !== false,
          minAssetReserve: normalizeNonNegativeInteger(item.minAssetReserve, 0),
          autoReturnNumberAfterDispatch: item.autoReturnNumberAfterDispatch === true,
        },
        kuaishouConsume: {
          shopId: String(item.kuaishouConsumeShopId || '').trim(),
          shopName: String(item.kuaishouConsumeShopName || '').trim(),
          autoConsumeAfterDispatch: item.autoConsumeAfterDispatch === true,
        },
        notes: String(item.notes || '').trim(),
      },
      match: {
        externalSkuCode: String(item.externalSkuCode || '').trim(),
        externalItemId: String(item.externalItemId || '').trim(),
        externalSkuName: String(item.externalSkuName || '').trim(),
        config: {
          resolvedSkuName: String(item.resolvedSkuName || item.internalSkuName || '').trim(),
        },
      },
    }))
    .filter((item) => item.skuCode && (item.match.externalSkuCode || item.match.externalItemId || item.match.externalSkuName))
}

function loadKuaishouCloudFulfillmentConfigFromFile() {
  if (!fs.existsSync(KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH)) {
    return normalizeKuaishouCloudFulfillmentConfig({})
  }

  try {
    const rawText = fs.readFileSync(KUAISHOU_CLOUD_FULFILLMENT_FILE_PATH, 'utf8')
    const parsed = JSON.parse(rawText)
    return normalizeKuaishouCloudFulfillmentConfig(parsed)
  } catch {
    return normalizeKuaishouCloudFulfillmentConfig({})
  }
}

function normalizeKuaishouCloudFulfillmentConfig(rawValue) {
  const source = isPlainObject(rawValue) ? rawValue : {}
  return {
    enabled: source.enabled !== false,
    items: Array.isArray(source.items)
      ? source.items.map((item) => normalizeKuaishouCloudFulfillmentItem(item)).filter(Boolean)
      : [],
  }
}

function normalizeKuaishouCloudFulfillmentItem(rawValue) {
  if (!isPlainObject(rawValue)) {
    return null
  }

  const internalSkuCode = String(rawValue.internalSkuCode || '').trim()
  const cloudSkuId = normalizePositiveInteger(rawValue.cloudSkuId)
  const externalSkuCode = String(rawValue.externalSkuCode || '').trim()
  const externalItemId = String(rawValue.externalItemId || '').trim()
  const externalSkuName = String(rawValue.externalSkuName || '').trim()

  if (!internalSkuCode) {
    return null
  }

  if (!cloudSkuId) {
    return null
  }

  if (!externalSkuCode && !externalItemId && !externalSkuName) {
    return null
  }

  return {
    id: String(rawValue.id || internalSkuCode).trim() || internalSkuCode,
    enabled: rawValue.enabled !== false,
    priority: normalizePriority(rawValue.priority),
    provider: String(rawValue.provider || '91kaquan').trim() || '91kaquan',
    platform: String(rawValue.platform || 'kuaishou').trim() || 'kuaishou',
    shopId: String(rawValue.shopId || '').trim(),
    internalSkuCode,
    internalSkuName: String(rawValue.internalSkuName || '').trim() || internalSkuCode,
    externalSkuCode,
    externalItemId,
    externalSkuName,
    resolvedSkuName: String(rawValue.resolvedSkuName || rawValue.internalSkuName || '').trim(),
    cloudSourceKey: String(rawValue.cloudSourceKey || 'default').trim() || 'default',
    cloudSkuId,
    cloudSkuName: String(rawValue.cloudSkuName || '').trim(),
    vnKey: '1',
    autoBuyEnabled: rawValue.autoBuyEnabled !== false,
    minAssetReserve: normalizeNonNegativeInteger(rawValue.minAssetReserve, 0),
    autoReturnNumberAfterDispatch: rawValue.autoReturnNumberAfterDispatch === true,
    autoConsumeAfterDispatch: rawValue.autoConsumeAfterDispatch === true,
    kuaishouConsumeShopId: String(rawValue.kuaishouConsumeShopId || '').trim(),
    kuaishouConsumeShopName: String(rawValue.kuaishouConsumeShopName || '').trim(),
    notes: String(rawValue.notes || '').trim(),
  }
}

function normalizePositiveInteger(value) {
  const parsed = Number(value)
  return Number.isInteger(parsed) && parsed > 0 ? parsed : 0
}

function normalizeNonNegativeInteger(value, fallback) {
  const parsed = Number(value)
  return Number.isInteger(parsed) && parsed >= 0 ? parsed : fallback
}

function normalizePriority(value) {
  const parsed = Number(value)
  if (!Number.isFinite(parsed)) {
    return 100
  }

  return Math.max(1, Math.round(parsed))
}

function isPlainObject(value) {
  return Object.prototype.toString.call(value) === '[object Object]'
}