/**
 * OmniCard AI (CRMmp) - 名片主潜客详情与跟进备忘业务驱动层
 * 拉线索详情 + 足迹分页，备忘只追加不覆盖
 */

import {
  LeadEntity,
  LeadStatus,
  OwnerPageData,
  OwnerPageQuery,
  RadarTrack,
  CardProfile,
} from '../../common/types.uts';
import {
  fetchOwnerLeadInfo,
  fetchOwnerRadarPage,
  updateOwnerLeadStatus,
} from '../../common/api.uts';
import { httpPost } from '../../common/request.uts';
import { getCurrentLocale, getOmniText } from '../../common/locale.uts';
import { statusLabel } from './useLeads.uts';
import { formatDepth, formatLocation, formatStay } from './useRadar.uts';
import { saveToContacts } from '../../common/vcard-export.uts';

export type LeadDetailCopyKey =
  | 'title'
  | 'score'
  | 'timeline'
  | 'notes'
  | 'notesPlaceholder'
  | 'save'
  | 'saving'
  | 'back'
  | 'empty'
  | 'missingId'
  | 'error'
  | 'loading'
  | 'stay'
  | 'depth'
  | 'aiScript'
  | 'comingSoon'
  | 'uploadHint'
  | 'stageTitle'
  | 'historyTitle'
  | 'stageUpdated'
  | 'copiedToast'
  | 'sourceLabel'
  | 'whatsappAction'
  | 'saveContactAction'
  | 'generateAiAction'
  | 'copyScriptAction'
  | 'applyScriptAction'
  | 'scriptCopiedToast'
  | 'savedContactToast'
  | 'leadTitle'
  | 'aiScriptTitle'
  | 'callFailed'
  | 'noteSavedToast'
  | 'notesRequiredToast';

export type LeadDetailPageOptions = {
  id?: string;
};

export type LoadDetailApi = {
  fetchOwnerLeadInfo?: (id: string | number) => Promise<LeadEntity>;
  fetchOwnerRadarPage?: (
    query: OwnerPageQuery
  ) => Promise<OwnerPageData<RadarTrack>>;
};

export type LoadDetailResult = {
  lead: LeadEntity | null;
  tracks: RadarTrack[];
  empty: boolean;
  errorMessage: string;
};

export type SaveNoteInput = {
  id: string | number;
  notes?: string;
  next: string;
  status?: LeadStatus;
  attachments?: string[];
};

export type SaveNoteApi = {
  httpPost?: (
    url: string,
    data: Record<string, string | number>
  ) => Promise<LeadEntity>;
  updateOwnerLeadStatus?: (
    id: string | number,
    status: LeadStatus
  ) => Promise<LeadEntity>;
};

export type SaveNoteResult = {
  ok: boolean;
  code?: number;
  lead: LeadEntity | null;
  errorMessage: string;
};

export type LeadDetailState = {
  rawId: string;
  leadId: string | number | null;
  lead: LeadEntity | null;
  name: string;
  company: string;
  phone: string;
  email: string;
  source: string;
  status: string;
  intentScore: number;
  existingNotes: string;
  nextNote: string;
  attachments: string[];
  tracks: RadarTrack[];
  loading: boolean;
  saving: boolean;
  empty: boolean;
  missingId: boolean;
  errorMessage: string;
  aiScript: string;
  aiGenerating: boolean;
};

const DEFAULT_PAGE = 1;
const DEFAULT_SIZE = 20;

function isZhLocale(): boolean {
  return getCurrentLocale() === 'zh-CN';
}

/**
 * 页面文案：标题 / 意向 / 轨迹 / 保存走词典，缺 id 与占位走本地词典
 */
export function resolveLeadDetailText(key: LeadDetailCopyKey): string {
  const locale = getCurrentLocale();
  if (key === 'title') {
    return getOmniText(locale, 'crm.follow_up');
  }
  if (key === 'score') {
    return getOmniText(locale, 'radar.lead_score');
  }
  if (key === 'timeline') {
    return getOmniText(locale, 'radar.visitor_trace');
  }
  if (key === 'notes') {
    return getOmniText(locale, 'crm.follow_up');
  }
  if (key === 'save') {
    return getOmniText(locale, 'common.save');
  }
  if (key === 'empty') {
    return getOmniText(locale, 'common.empty');
  }
  if (key === 'error') {
    return getOmniText(locale, 'common.error');
  }
  if (key === 'loading') {
    return getOmniText(locale, 'common.loading');
  }

  const zh = isZhLocale();
  if (key === 'notesPlaceholder') {
    return zh ? '追加一条跟进备忘' : 'Add a follow-up note';
  }
  if (key === 'back') {
    return zh ? '返回列表' : 'Back to list';
  }
  if (key === 'missingId') {
    return zh ? '缺少潜客编号' : 'Lead ID is missing';
  }
  if (key === 'stay') {
    return zh ? '停留' : 'Stay';
  }
  if (key === 'depth') {
    return zh ? '滚动深度' : 'Scroll depth';
  }
  if (key === 'aiScript') {
    return zh
      ? '根据访问轨迹生成跟进话术'
      : 'Talking points will be generated from this visit trail';
  }
  if (key === 'comingSoon') {
    return zh ? '即将提供' : 'Coming soon';
  }
  if (key === 'uploadHint') {
    return zh ? '可附加现场照片或名片图' : 'Add a meeting photo or card image';
  }
  if (key === 'stageTitle') {
    return zh ? '商机阶段' : 'Pipeline Stage';
  }
  if (key === 'historyTitle') {
    return zh ? '历史跟进纪要' : 'Follow-up History';
  }
  if (key === 'stageUpdated') {
    return zh ? '阶段已更新' : 'Stage updated';
  }
  if (key === 'copiedToast') {
    return zh ? '已复制到剪贴板' : 'Copied to clipboard';
  }
  if (key === 'sourceLabel') {
    return zh ? '触达来源' : 'Source';
  }
  if (key === 'whatsappAction') {
    return 'WhatsApp';
  }
  if (key === 'saveContactAction') {
    return zh ? '保存到通讯录' : 'Save Contact';
  }
  if (key === 'generateAiAction') {
    return zh ? '生成跟进话术' : 'Generate Script';
  }
  if (key === 'copyScriptAction') {
    return zh ? '复制话术' : 'Copy Script';
  }
  if (key === 'applyScriptAction') {
    return zh ? '填入备忘' : 'Apply to Note';
  }
  if (key === 'scriptCopiedToast') {
    return zh ? '话术已复制' : 'Script copied';
  }
  if (key === 'savedContactToast') {
    return zh ? '联系人已保存' : 'Contact saved';
  }
  if (key === 'leadTitle') {
    return zh ? '潜客档案' : 'Lead Profile';
  }
  if (key === 'aiScriptTitle') {
    return zh ? '建议跟进话术' : 'Follow-up Suggestion';
  }
  if (key === 'callFailed') {
    return zh ? '无法拨打电话' : 'Unable to place the call';
  }
  if (key === 'noteSavedToast') {
    return zh ? '备忘已保存' : 'Note saved';
  }
  if (key === 'notesRequiredToast') {
    return zh ? '请输入备忘或上传附件' : 'Please enter note or upload attachment';
  }
  if (key === 'saving') {
    return zh ? '保存中' : 'Saving';
  }
  return '';
}

export function statusLabelOf(status: string): string {
  return statusLabel(status);
}

export function formatTrackStay(ms: number | null | undefined): string {
  return formatStay(ms);
}

export function formatTrackDepth(depth: number | null | undefined): string {
  return formatDepth(depth);
}

export function formatTrackPlace(country?: string, city?: string): string {
  return formatLocation(country, city);
}

/**
 * 解析为正整数。非正整数返回 null
 */
export function parseLeadId(
  raw: string | number | null | undefined
): string | number | null {
  if (raw == null) {
    return null;
  }
  if (typeof raw === 'number') {
    if (raw <= 0) {
      return null;
    }
    if (Math.floor(raw) !== raw) {
      return null;
    }
    return raw;
  }
  const text = String(raw).trim();
  if (text === '') {
    return null;
  }
  if (!/^[1-9]\d*$/.test(text)) {
    return null;
  }
  return Number(text);
}

/**
 * 拼接备忘：新内容追加在旧内容后，空输入不覆盖
 */
export function appendNote(
  existing: string | null | undefined,
  next: string | null | undefined
): string {
  const prev = existing != null ? String(existing).trim() : '';
  const extra = next != null ? String(next).trim() : '';
  if (prev === '') {
    return extra;
  }
  if (extra === '') {
    return prev;
  }
  return `${prev}\n${extra}`;
}

/**
 * 清洗手机号并生成 WhatsApp 直达链接 (wa.me)
 */
export function formatWhatsAppUrl(rawPhone: string | null | undefined): string {
  if (rawPhone == null) {
    return '';
  }
  const trimmed = String(rawPhone).trim();
  if (trimmed === '') {
    return '';
  }
  let digits = trimmed.replace(/[^0-9]/g, '');
  if (digits.startsWith('00')) {
    digits = digits.slice(2);
  }
  if (digits === '') {
    return '';
  }
  return `https://wa.me/${digits}`;
}

function toastNone(title: string): void {
  uni.showToast({
    title,
    icon: 'none',
  });
}

/**
 * 打开外链：优先 window.open（H5），否则复制链接（对齐 useLogin openOrCopyAuthUrl）
 */
function openExternalUrl(url: string): boolean {
  const safeUrl = url != null ? url.trim() : '';
  if (safeUrl === '') {
    return false;
  }

  let opened = false;
  try {
    if (typeof window !== 'undefined' && typeof window.open === 'function') {
      window.open(safeUrl, '_blank');
      opened = true;
    }
  } catch (_e) {}

  if (opened) {
    return true;
  }

  try {
    uni.setClipboardData({
      data: safeUrl,
      showToast: true,
    });
    return true;
  } catch (_e) {
    return false;
  }
}

/**
 * 有合法电话号时调 uni.makePhoneCall；无号码 toast comingSoon。
 * 不伪造成功：fail 回调提示 callFailed。
 */
export function callLeadPhone(phone: string | null | undefined): boolean {
  const trimmed = phone != null ? String(phone).trim() : '';
  const digits = trimmed.replace(/[^0-9]/g, '');
  if (trimmed === '' || digits === '') {
    toastNone(resolveLeadDetailText('comingSoon'));
    return false;
  }

  uni.makePhoneCall({
    phoneNumber: trimmed,
    fail: () => {
      toastNone(resolveLeadDetailText('callFailed'));
    },
  });
  return true;
}

/**
 * 有 WhatsApp/电话号码时打开 wa.me；无号码 toast comingSoon，不打开空链接。
 */
export function openLeadWhatsApp(
  phoneOrWhatsApp: string | null | undefined
): boolean {
  const waUrl = formatWhatsAppUrl(phoneOrWhatsApp);
  if (waUrl === '') {
    toastNone(resolveLeadDetailText('comingSoon'));
    return false;
  }
  return openExternalUrl(waUrl);
}

/**
 * 跟进话术生成器 (基于客户姓名、公司、渠道与意向板块)
 */
export function generateAiIcebreaker(
  lead: LeadEntity | null,
  tracks: RadarTrack[],
  locale?: string
): string {
  if (lead == null) {
    return '';
  }
  const currentLoc =
    locale != null && locale !== '' ? locale : getCurrentLocale();
  const isZh = currentLoc === 'zh-CN';
  const name = lead.name.trim();
  const company =
    lead.company != null && lead.company.trim() !== ''
      ? lead.company.trim()
      : '';
  const source =
    lead.source != null ? String(lead.source).toUpperCase() : 'OMNICARD';

  let keyTopic = '';
  if (tracks.length > 0) {
    for (const track of tracks) {
      if (track.viewedBlocks != null && track.viewedBlocks.length > 0) {
        keyTopic = track.viewedBlocks[0];
        break;
      }
    }
  }

  if (isZh) {
    const topicPart = keyTopic !== '' ? `【${keyTopic}】等` : '';
    return `您好 ${name}，看到您此前通过 ${source} 关注了我们的数字名片${topicPart}内容。请问您近期是否有相关的业务合作或定制需求？期待与您交流。`;
  }

  const firstWord = name.split(' ')[0];
  const companyPart = company !== '' ? ` for ${company}` : '';
  return `Hi ${firstWord}, thanks for connecting via ${source} and reviewing our profile. Please let me know if you have any questions or collaboration interests${companyPart}. Look forward to connecting!`;
}

/**
 * 结构化拼接备忘：将附件图片持久化嵌入备忘文本，避免数据丢失
 */
export function appendStructuredNote(
  existing: string | null | undefined,
  next: string | null | undefined,
  attachments?: string[]
): string {
  const prev = existing != null ? String(existing).trim() : '';
  let extra = next != null ? String(next).trim() : '';
  if (attachments != null && attachments.length > 0) {
    const attachList = attachments.filter((url) => url.trim() !== '');
    if (attachList.length > 0) {
      const attachText = attachList.join(' ');
      extra = extra !== '' ? `${extra}\n[${attachText}]` : `[${attachText}]`;
    }
  }
  if (prev === '') {
    return extra;
  }
  if (extra === '') {
    return prev;
  }
  return `${prev}\n${extra}`;
}

export type ParsedNoteResult = {
  cleanText: string;
  imageUrls: string[];
};

/**
 * 结构化解析历史备忘，分离纯文本说明与附件图片 URL 列表
 */
export function parseNoteAttachments(
  rawNote: string | null | undefined
): ParsedNoteResult {
  if (rawNote == null || rawNote.trim() === '') {
    return { cleanText: '', imageUrls: [] };
  }
  const trimmed = rawNote.trim();
  const bracketRegex = /\[(.*?)\]/g;
  const imageUrls: string[] = [];
  let match: RegExpExecArray | null = null;

  while ((match = bracketRegex.exec(trimmed)) !== null) {
    const inside = match[1];
    if (inside.includes('http://') || inside.includes('https://')) {
      const parts = inside.split(/\s+/);
      for (const part of parts) {
        const p = part.trim();
        if (p.startsWith('http://') || p.startsWith('https://')) {
          imageUrls.push(p);
        }
      }
    }
  }

  const cleanText = trimmed.replace(bracketRegex, '').trim();
  return { cleanText, imageUrls };
}

export type DeviceContactDraft = {
  id?: string | number;
  name: string;
  company?: string;
  phone?: string;
  email?: string;
};

/**
 * 保存到手机系统通讯录 (深度复用通用 RFC 6350 / vCard 引擎)
 */
export async function saveContactToDevice(
  lead: DeviceContactDraft | null
): Promise<boolean> {
  if (lead == null) {
    return false;
  }
  const card: CardProfile = {
    id: lead.id,
    name: lead.name,
    company: lead.company != null ? lead.company : '',
    phone: lead.phone != null ? lead.phone : '',
    email: lead.email != null ? lead.email : '',
  };
  return saveToContacts(card);
}

function readErrorMessage(err: unknown): string {
  if (err instanceof Error && err.message !== '') {
    return err.message;
  }
  return resolveLeadDetailText('error');
}

function parseTrackList(
  payload: OwnerPageData<RadarTrack> | null | undefined
): RadarTrack[] {
  if (payload == null || payload.list == null) {
    return [];
  }
  return payload.list;
}

/**
 * 拉取潜客详情与足迹。可注入 fetchOwnerLeadInfo / fetchOwnerRadarPage
 */
export async function loadDetail(
  id: string | number | null | undefined,
  api?: LoadDetailApi
): Promise<LoadDetailResult> {
  const leadId = parseLeadId(id);
  if (leadId == null) {
    return {
      lead: null,
      tracks: [],
      empty: true,
      errorMessage: '',
    };
  }

  const fetchInfo =
    api != null && api.fetchOwnerLeadInfo != null
      ? api.fetchOwnerLeadInfo
      : fetchOwnerLeadInfo;
  const fetchRadar =
    api != null && api.fetchOwnerRadarPage != null
      ? api.fetchOwnerRadarPage
      : fetchOwnerRadarPage;

  try {
    const lead = await fetchInfo(leadId);
    const visitorId = lead.visitorId != null ? String(lead.visitorId) : '';
    const radarQuery: OwnerPageQuery = {
      page: DEFAULT_PAGE,
      size: DEFAULT_SIZE,
      keyWord: visitorId,
      cardId: lead.cardId,
    };
    try {
      const payload = await fetchRadar(radarQuery);
      const tracks = parseTrackList(payload);
      return {
        lead,
        tracks,
        empty: false,
        errorMessage: '',
      };
    } catch (radarErr) {
      return {
        lead,
        tracks: [],
        empty: false,
        errorMessage: readErrorMessage(radarErr),
      };
    }
  } catch (err) {
    return {
      lead: null,
      tracks: [],
      empty: true,
      errorMessage: readErrorMessage(err),
    };
  }
}

/**
 * 更新 notes（支持附件结构化嵌入）：POST /admin/crm/lead/update { id, notes }
 * 仅 Cool-Admin code === 1000（http 层已解包成功）视为保存成功
 */
export async function saveNote(
  input: SaveNoteInput,
  api?: SaveNoteApi
): Promise<SaveNoteResult> {
  const notes = appendStructuredNote(
    input.notes,
    input.next,
    input.attachments
  );
  const post =
    api != null && api.httpPost != null ? api.httpPost : httpPost;
  const payload: Record<string, string | number> = {
    id: input.id,
    notes,
  };
  try {
    const lead = await post<LeadEntity>('/admin/crm/lead/update', payload);
    return {
      ok: true,
      code: 1000,
      lead,
      errorMessage: '',
    };
  } catch (err) {
    return {
      ok: false,
      code: undefined,
      lead: null,
      errorMessage: readErrorMessage(err),
    };
  }
}

export function createLeadDetailState(): LeadDetailState {
  return {
    rawId: '',
    leadId: null,
    lead: null,
    name: '',
    company: '',
    phone: '',
    email: '',
    source: '',
    status: '',
    intentScore: 0,
    existingNotes: '',
    nextNote: '',
    attachments: [],
    tracks: [],
    loading: false,
    saving: false,
    empty: false,
    missingId: false,
    errorMessage: '',
    aiScript: '',
    aiGenerating: false,
  };
}

export function applyLeadDetailOptions(
  state: LeadDetailState,
  options: LeadDetailPageOptions | null
): boolean {
  if (options == null || options.id == null) {
    state.rawId = '';
    state.leadId = null;
    state.missingId = true;
    state.empty = true;
    return false;
  }
  const parsed = parseLeadId(options.id);
  state.rawId = String(options.id).trim();
  state.leadId = parsed;
  state.missingId = parsed == null;
  state.empty = parsed == null;
  return parsed != null;
}

function applyLeadToState(state: LeadDetailState, lead: LeadEntity): void {
  state.lead = lead;
  state.name = lead.name;
  state.company = lead.company != null ? lead.company : '';
  state.phone = lead.phone != null ? lead.phone : '';
  state.email = lead.email != null ? lead.email : '';
  state.source = lead.source != null ? String(lead.source) : '';
  state.status = lead.status;
  state.intentScore = lead.intentScore;
  state.existingNotes = lead.notes != null ? lead.notes : '';
}

export function applyLoadResult(
  state: LeadDetailState,
  result: LoadDetailResult
): void {
  if (result.lead != null) {
    applyLeadToState(state, result.lead);
    state.empty = false;
    state.missingId = false;
  } else {
    state.lead = null;
    state.empty = true;
  }
  state.tracks = result.tracks;
  state.errorMessage = result.errorMessage;
}

export async function refreshLeadDetail(
  state: LeadDetailState,
  api?: LoadDetailApi
): Promise<LoadDetailResult> {
  if (state.missingId || state.leadId == null) {
    const skipped: LoadDetailResult = {
      lead: null,
      tracks: [],
      empty: true,
      errorMessage: '',
    };
    applyLoadResult(state, skipped);
    state.missingId = true;
    return skipped;
  }
  if (state.loading) {
    return {
      lead: state.lead,
      tracks: state.tracks,
      empty: state.empty,
      errorMessage: state.errorMessage,
    };
  }
  state.loading = true;
  state.errorMessage = '';
  const result = await loadDetail(state.leadId, api);
  applyLoadResult(state, result);
  state.loading = false;
  return result;
}

export async function submitLeadNote(
  state: LeadDetailState,
  api?: SaveNoteApi
): Promise<boolean> {
  if (state.leadId == null || state.saving) {
    return false;
  }
  const next = state.nextNote.trim();
  const hasAttachments = state.attachments != null && state.attachments.length > 0;
  if (next === '' && !hasAttachments) {
    return false;
  }
  state.saving = true;
  state.errorMessage = '';
  const result = await saveNote(
    {
      id: state.leadId,
      notes: state.existingNotes,
      next,
      status: state.lead != null ? state.lead.status : undefined,
      attachments: state.attachments,
    },
    api
  );
  // 仅接口 code === 1000 才清空输入并标成已保存
  if (result.ok && result.code === 1000 && result.lead != null) {
    applyLeadToState(state, result.lead);
    state.nextNote = '';
    state.attachments = [];
    state.saving = false;
    return true;
  }
  state.saving = false;
  state.errorMessage = result.errorMessage;
  return false;
}

export async function updateLeadStage(
  state: LeadDetailState,
  newStatus: LeadStatus,
  api?: SaveNoteApi
): Promise<boolean> {
  if (state.leadId == null || state.saving) {
    return false;
  }
  const prevStatus = state.status;
  state.status = newStatus;
  state.saving = true;
  state.errorMessage = '';
  try {
    const updateFn =
      api != null && api.updateOwnerLeadStatus != null
        ? api.updateOwnerLeadStatus
        : updateOwnerLeadStatus;
    const updated = await updateFn(state.leadId, newStatus);
    applyLeadToState(state, updated);
    state.saving = false;
    return true;
  } catch (err) {
    state.status = prevStatus;
    state.saving = false;
    state.errorMessage = readErrorMessage(err);
    return false;
  }
}

export function goBackFromLeadDetail(): void {
  uni.navigateBack({
    delta: 1,
    fail: () => {
      uni.switchTab({
        url: '/pages/owner/leads',
      });
    },
  });
}