import { axiosInstance } from '@/api/rbac'
import { assertBusinessOk, omsUrl, unwrapData } from '@/api/oms/common'

/** 与桌面版 emailAuto.py 一致：阿里企业邮等 */
export type BatchEmailServerType = 'qiye' | 'qiye_ssl' | 'aliyun' | 'aliyun_ssl' | 'mxhichina'

/** 与后端 BatchEmailSmtpHelper.SecretMask 一致，用于线上已保存密码占位 */
export const SMTP_SECRET_MASK = '******'

export function isSmtpSecretMask(value?: string | null): boolean {
  return String(value ?? '').trim() === SMTP_SECRET_MASK
}

export interface BatchEmailTemplate {
  name: string
  subject: string
  content: string
}

export interface BatchEmailAccount {
  smtpUsername: string
  smtpPassword: string
  serverType: BatchEmailServerType
  fromName?: string
}

export interface BatchEmailSendOneBody {
  smtpUsername: string
  smtpPassword: string
  serverType?: BatchEmailServerType
  to: string
  subject: string
  body: string
  bodyType?: 'plain' | 'html'
  fromName?: string
}

function pickStr(row: Record<string, unknown>, ...keys: string[]) {
  for (const key of keys) {
    const val = row[key]
    if (val != null && String(val).trim() !== '') return String(val).trim()
  }
  return ''
}

function normalizeTemplate(raw: unknown): BatchEmailTemplate | null {
  if (raw == null || typeof raw !== 'object') return null
  const row = raw as Record<string, unknown>
  const name = pickStr(row, 'name', 'Name')
  if (!name) return null
  return {
    name,
    subject: pickStr(row, 'subject', 'Subject') || name,
    content: pickStr(row, 'content', 'Content'),
  }
}

function normalizeAccount(raw: unknown): BatchEmailAccount | null {
  if (raw == null || typeof raw !== 'object') return null
  const row = raw as Record<string, unknown>
  const smtpUsername = pickStr(row, 'smtpUsername', 'SmtpUsername')
  if (!smtpUsername) return null
  const serverType = (pickStr(row, 'serverType', 'ServerType') || 'qiye') as BatchEmailServerType
  return {
    smtpUsername,
    smtpPassword: pickStr(row, 'smtpPassword', 'SmtpPassword'),
    serverType,
    fromName: pickStr(row, 'fromName', 'FromName') || undefined,
  }
}

export interface BatchEmailSendRecord {
  id: number
  toEmail: string
  subject: string
  content: string
  sendTime: string
  sender: string
}

function normalizeRecord(raw: unknown): BatchEmailSendRecord | null {
  if (raw == null || typeof raw !== 'object') return null
  const row = raw as Record<string, unknown>
  const id = Number(row.id ?? row.Id)
  if (!Number.isFinite(id)) return null
  return {
    id,
    toEmail: pickStr(row, 'toEmail', 'ToEmail'),
    subject: pickStr(row, 'subject', 'Subject'),
    content: pickStr(row, 'content', 'Content'),
    sendTime: pickStr(row, 'sendTime', 'SendTime'),
    sender: pickStr(row, 'sender', 'Sender'),
  }
}

function unwrapPageResult(resBody: unknown): { items: unknown[]; total: number } {
  assertBusinessOk(resBody)
  const root = (resBody as Record<string, unknown>) ?? {}
  const inner = (root.data ?? root.Data ?? root) as Record<string, unknown>
  const items = inner.items ?? inner.Items ?? inner.list ?? inner.List ?? []
  const total = Number(inner.total ?? inner.Total ?? inner.totalCount ?? inner.TotalCount ?? 0)
  return {
    items: Array.isArray(items) ? items : [],
    total: Number.isFinite(total) ? total : 0,
  }
}

function unwrapList(resBody: unknown): unknown[] {
  assertBusinessOk(resBody)
  const root = (resBody as Record<string, unknown>) ?? {}
  const inner = root.data ?? root.Data ?? root
  if (Array.isArray(inner)) return inner
  return unwrapPageResult(resBody).items
}

/** GET /system/batch-email/account */
export async function getBatchEmailAccount(): Promise<BatchEmailAccount | null> {
  const res = await axiosInstance.get(omsUrl('/system/batch-email/account'))
  const raw = unwrapData<Record<string, unknown> | null>(res.data)
  return raw ? normalizeAccount(raw) : null
}

/** GET /system/batch-email/templates/list */
export async function listBatchEmailTemplates(): Promise<BatchEmailTemplate[]> {
  const res = await axiosInstance.get(omsUrl('/system/batch-email/templates/list'))
  return unwrapList(res.data)
    .map(normalizeTemplate)
    .filter((item): item is BatchEmailTemplate => item != null)
}

/** POST /system/batch-email/templates/save */
export async function saveBatchEmailTemplate(body: {
  name: string
  subject: string
  content: string
}) {
  const res = await axiosInstance.post(omsUrl('/system/batch-email/templates/save'), body)
  assertBusinessOk(res.data)
}

/** POST /system/batch-email/templates/delete */
export async function deleteBatchEmailTemplate(body: { name: string }) {
  const res = await axiosInstance.post(omsUrl('/system/batch-email/templates/delete'), body)
  assertBusinessOk(res.data)
}

/** POST /system/batch-email/account/save */
export async function saveBatchEmailAccount(body: BatchEmailAccount) {
  const res = await axiosInstance.post(omsUrl('/system/batch-email/account/save'), body)
  assertBusinessOk(res.data)
}

/** POST /system/batch-email/test-connection — 验证 SMTP 账号 */
export async function testBatchEmailConnection(body: {
  smtpUsername: string
  smtpPassword: string
  serverType?: BatchEmailServerType
  fromName?: string
}) {
  const res = await axiosInstance.post(omsUrl('/system/batch-email/test-connection'), body)
  assertBusinessOk(res.data)
}

/** POST /system/batch-email/send-one — 发送单封（批量时由前端循环调用，便于逐条写日志） */
export async function sendBatchEmailOne(body: BatchEmailSendOneBody) {
  const res = await axiosInstance.post(omsUrl('/system/batch-email/send-one'), body)
  assertBusinessOk(res.data)
}

/** GET /system/batch-email/records/list */
export async function listBatchEmailRecords(params?: { page?: number; pageSize?: number }) {
  const res = await axiosInstance.get(omsUrl('/system/batch-email/records/list'), { params })
  const page = unwrapPageResult(res.data)
  return {
    items: page.items
      .map(normalizeRecord)
      .filter((item): item is BatchEmailSendRecord => item != null),
    total: page.total,
  }
}