const { request, downloadFile, buildResultView } = require('../../utils/request');

const RESULT_PREVIEW_LIMIT = 240;

function safeParseResult(raw) {
  if (raw === null || raw === undefined) return null;
  if (typeof raw === 'string') {
    try {
      return JSON.parse(raw);
    } catch (e) {
      return null;
    }
  }
  return raw;
}

function pickList(obj) {
  if (!obj || typeof obj !== 'object') return null;
  const keys = ['list', 'items', 'records', 'rows', 'data', 'result'];
  for (let i = 0; i < keys.length; i += 1) {
    const value = obj[keys[i]];
    if (Array.isArray(value)) return value;
  }
  return null;
}

function toArray(parsed) {
  if (!parsed || typeof parsed !== 'object') return [];
  if (Array.isArray(parsed)) return parsed;
  const list = pickList(parsed);
  if (list) return list;
  return [parsed];
}

function isTaskLike(item) {
  if (!item || typeof item !== 'object') return false;
  return item.id !== undefined || item.task_id !== undefined || item.title || item.content || item.robot_id !== undefined;
}

function buildTaskCards(parsed) {
  const list = toArray(parsed).filter(isTaskLike).slice(0, 6);
  return list.map(item => {
    const title = item.title || item.name || item.subject || item.task_name || '';
    const content = item.content || item.description || item.desc || item.detail || '';
    return {
      id: item.id || item.task_id || item.taskId || '',
      title: title || (item.id || item.task_id ? `任务 ${item.id || item.task_id}` : '任务'),
      status: item.status,
      priority: item.priority,
      robotId: item.robot_id || item.robotId,
      contentPreview: content ? String(content).slice(0, 80) : ''
    };
  });
}

function buildResultState(text) {
  const content = text || '';
  return { resultHasMore: content.length > RESULT_PREVIEW_LIMIT, resultExpanded: false };
}

Page({
  data: {
    id: '',
    title: '',
    robot_id: '',
    content: '',
    status: '',
    priority: '',
    keyword: '',
    page: 1,
    page_size: 10,
    convId: '',
    result: '',
    resultCards: [],
    resultExpanded: false,
    resultHasMore: false,
    taskCards: []
  },
  onInput(e) {
    const key = e.currentTarget.dataset.key;
    this.setData({ [key]: e.detail.value });
  },
  toggleResult() {
    this.setData({ resultExpanded: !this.data.resultExpanded });
  },
  setResult(result) {
    const view = buildResultView(result);
    const parsed = safeParseResult(result);
    const taskCards = buildTaskCards(parsed);
    const state = buildResultState(view.text);
    this.setData({ result: view.text, resultCards: view.cards, taskCards, ...state });
  },
  async list() {
    const qs = [];
    qs.push(`page=${encodeURIComponent(this.data.page)}`);
    qs.push(`page_size=${encodeURIComponent(this.data.page_size)}`);
    if (this.data.robot_id) qs.push(`robot_id=${encodeURIComponent(this.data.robot_id)}`);
    if (this.data.status) qs.push(`status=${encodeURIComponent(this.data.status)}`);
    if (this.data.keyword) qs.push(`keyword=${encodeURIComponent(this.data.keyword)}`);
    const result = await request({ url: `/api/prompt/tasks?${qs.join('&')}` });
    this.setResult(result);
  },
  async detail() {
    const result = await request({ url: `/api/prompt/tasks/${encodeURIComponent(this.data.id)}?with_conversations=true` });
    this.setResult(result);
  },
  async create() {
    const payload = this.buildPayload();
    const result = await request({ url: '/api/prompt/tasks', method: 'POST', data: payload });
    this.setResult(result);
  },
  async update() {
    const payload = this.buildPayload();
    const result = await request({ url: `/api/prompt/tasks/${encodeURIComponent(this.data.id)}`, method: 'PUT', data: payload });
    this.setResult(result);
  },
  async remove() {
    const result = await request({ url: `/api/prompt/tasks/${encodeURIComponent(this.data.id)}`, method: 'DELETE' });
    this.setResult(result);
  },
  async updateStatus() {
    const result = await request({
      url: `/api/prompt/tasks/${encodeURIComponent(this.data.id)}/status`,
      method: 'PUT',
      data: { status: Number(this.data.status) }
    });
    this.setResult(result);
  },
  async clearConversations() {
    const result = await request({ url: `/api/prompt/tasks/${encodeURIComponent(this.data.id)}/conversations`, method: 'DELETE' });
    this.setResult(result);
  },
  async deleteConversation() {
    const result = await request({ url: `/api/prompt/conversations/${encodeURIComponent(this.data.convId)}`, method: 'DELETE' });
    this.setResult(result);
  },
  async download() {
    try {
      const tempPath = await downloadFile({ url: `/api/prompt/tasks/${encodeURIComponent(this.data.id)}/download` });
      this.setResult(`下载成功: ${tempPath}`);
    } catch (e) {
      this.setResult('下载失败');
    }
  },
  buildPayload() {
    return {
      title: this.data.title,
      robot_id: this.data.robot_id ? Number(this.data.robot_id) : undefined,
      content: this.data.content,
      status: this.data.status ? Number(this.data.status) : undefined,
      priority: this.data.priority ? Number(this.data.priority) : undefined
    };
  }
});