#!/usr/bin/env node
/**
 * Direct goosed page smoke on TKMIND_API_TARGET (default https://127.0.0.1:18006).
 */
import fs from 'node:fs';
import path from 'node:path';
import { Readable } from 'node:stream';
import { fileURLToPath } from 'node:url';
import { Agent, fetch } from 'undici';

import { buildChatSkillPrompt } from '../chat-skills.mjs';

const root = path.join(path.dirname(fileURLToPath(import.meta.url)), '..');

function loadEnvFile(filePath) {
  if (!fs.existsSync(filePath)) return;
  for (const line of fs.readFileSync(filePath, 'utf8').split('\n')) {
    const trimmed = line.trim();
    if (!trimmed || trimmed.startsWith('#')) continue;
    const eq = trimmed.indexOf('=');
    if (eq < 0) continue;
    const key = trimmed.slice(0, eq).trim();
    const value = trimmed.slice(eq + 1).trim();
    if (!process.env[key]) process.env[key] = value;
  }
}

loadEnvFile(path.join(root, '.env'));

const secret = process.env.TKMIND_SERVER__SECRET_KEY ?? 'local-dev-secret';
const base = process.env.TKMIND_API_TARGET ?? 'https://127.0.0.1:18006';
const workingDir = path.resolve(
  process.argv[2] ?? path.join(root, '.release-gate/local/goosed-direct-page'),
);
const targetHtml = process.argv[3] ?? 'public/suzhou-goosed-direct.html';
const provider = process.argv[4] ?? process.env.GOOSED_PAGE_TEST_PROVIDER ?? 'custom_tkmind_relay_deepseek';
const model = process.argv[5] ?? process.env.GOOSED_PAGE_TEST_MODEL ?? 'deepseek-chat';
const timeoutMs = Number(process.env.GOOSED_PAGE_TEST_TIMEOUT_MS ?? 600_000);

const dispatcher = new Agent({ connect: { rejectUnauthorized: false } });

async function apiFetch(pathname, init = {}) {
  const headers = {
    ...(init.headers ?? {}),
    'X-Secret-Key': secret,
  };
  if (init.body && !headers['Content-Type']) {
    headers['Content-Type'] = 'application/json';
  }
  return fetch(`${base}${pathname}`, {
    ...init,
    headers,
    dispatcher,
  });
}

async function apiJson(pathname, body) {
  const response = await apiFetch(pathname, {
    method: 'POST',
    body: JSON.stringify(body),
  });
  const text = await response.text();
  if (!response.ok) throw new Error(`${pathname} ${response.status}: ${text.slice(0, 800)}`);
  if (!text.trim()) return {};
  return JSON.parse(text);
}

function messageVisibleText(message) {
  return (message?.content ?? [])
    .filter((item) => item?.type === 'text')
    .map((item) => String(item.text ?? ''))
    .join('\n')
    .trim();
}

async function executeSessionReply(sessionId, requestId, prompt) {
  const eventsResponse = await apiFetch(`/sessions/${sessionId}/events`, {
    method: 'GET',
    headers: { Accept: 'text/event-stream' },
  });
  if (!eventsResponse.ok || !eventsResponse.body) {
    const text = await eventsResponse.text().catch(() => '');
    throw new Error(text || '无法建立 goosed 事件流');
  }

  const replyResponse = await apiFetch(`/sessions/${sessionId}/reply`, {
    method: 'POST',
    body: JSON.stringify({
      request_id: requestId,
      user_message: {
        role: 'user',
        created: Date.now(),
        content: [{ type: 'text', text: prompt }],
        metadata: { userVisible: true, agentVisible: true, displayText: prompt },
      },
    }),
  });
  if (!replyResponse.ok) {
    const text = await replyResponse.text().catch(() => '');
    throw new Error(text || 'reply 失败');
  }
  replyResponse.body?.cancel?.();

  const reader = Readable.fromWeb(eventsResponse.body);
  const decoder = new TextDecoder();
  let buffer = '';
  let messages = [];
  let finishSeen = false;
  let errorText = '';

  const pushMessage = (list, message) => {
    const index = list.findIndex((item) => item.id === message.id);
    if (index >= 0) {
      const next = [...list];
      next[index] = message;
      return next;
    }
    return [...list, message];
  };

  const deadline = Date.now() + timeoutMs;
  for await (const chunk of reader) {
    if (Date.now() > deadline) throw new Error(`goosed 事件流超时 ${timeoutMs}ms`);
    buffer += decoder.decode(chunk, { stream: true });
    const frames = buffer.split('\n\n');
    buffer = frames.pop() ?? '';
    for (const frame of frames) {
      let data = '';
      for (const line of frame.split('\n')) {
        if (line.startsWith('data:')) data += line.slice(5).trim();
      }
      if (!data) continue;
      let event;
      try {
        event = JSON.parse(data);
      } catch {
        continue;
      }
      const routingId = event.chat_request_id ?? event.request_id;
      if (routingId && routingId !== requestId) continue;

      if (event.type === 'Message' && event.message?.metadata?.userVisible !== false) {
        messages = pushMessage(messages, event.message);
      } else if (event.type === 'UpdateConversation') {
        messages = (event.conversation ?? []).filter((item) => item.metadata?.userVisible !== false);
      } else if (event.type === 'Error') {
        errorText = String(event.error ?? event.message ?? 'goose 执行失败');
        throw new Error(errorText);
      } else if (event.type === 'Finish') {
        finishSeen = true;
        break;
      }
    }
    if (finishSeen) break;
  }

  const assistantTexts = messages
    .filter((item) => item.role === 'assistant')
    .map((item) => messageVisibleText(item))
    .filter(Boolean);
  return {
    finishSeen,
    combined: assistantTexts.join('\n\n').trim(),
    toolCalls: messages.flatMap((item) => (item.content ?? [])
      .filter((part) => part?.type === 'toolRequest' || part?.type === 'toolResponse')
      .map((part) => ({
        role: item.role,
        type: part.type,
        name: part.toolCall?.value?.name ?? part.toolResponse?.value?.name ?? part.name ?? null,
      }))),
  };
}

async function main() {
  fs.mkdirSync(path.join(workingDir, 'public'), { recursive: true });
  console.log(`goosed base: ${base}`);
  console.log(`working_dir: ${workingDir}`);
  console.log(`target: ${targetHtml}`);
  console.log(`provider: ${provider} / ${model}`);

  const start = await apiJson('/agent/start', { working_dir: workingDir });
  const sessionId = start.id;
  console.log(`session: ${sessionId}`);

  await apiJson('/agent/update_provider', {
    session_id: sessionId,
    provider,
    model,
  });

  const skillPrefix = buildChatSkillPrompt('generate-page', 'static-page-publish');
  const userText = `${skillPrefix}请帮我做一个全新的苏州一日游攻略页面，保存为 ${targetHtml}，不要修改或复用已有页面，做完直接给我链接。`;
  const requestId = crypto.randomUUID();

  const reply = await executeSessionReply(sessionId, requestId, userText);
  const htmlPath = path.join(workingDir, targetHtml);
  const htmlExists = fs.existsSync(htmlPath);
  const htmlSize = htmlExists ? fs.statSync(htmlPath).size : 0;

  console.log('\n=== result ===');
  console.log(`finish_seen: ${reply.finishSeen}`);
  console.log(`html_exists: ${htmlExists}`);
  console.log(`html_bytes: ${htmlSize}`);
  console.log(`tool_calls: ${reply.toolCalls.length}`);
  for (const call of reply.toolCalls.slice(-12)) {
    console.log(`  - ${call.role} ${call.type} ${call.name ?? ''}`);
  }
  if (reply.combined) {
    console.log('\n--- assistant excerpt ---');
    console.log(reply.combined.slice(-1500));
  }

  if (!htmlExists || htmlSize <= 0) {
    console.error('\nFAIL: goosed did not materialize target HTML in working_dir');
    process.exit(1);
  }
  const html = fs.readFileSync(htmlPath, 'utf8');
  if (!/苏州/u.test(html)) {
    console.error('\nFAIL: generated HTML missing expected keyword 苏州');
    process.exit(1);
  }
  console.log('\nPASS: goosed wrote deliverable HTML on 18006');
}

main().catch((error) => {
  console.error(error instanceof Error ? error.stack ?? error.message : error);
  process.exit(1);
});