#!/usr/bin/env node
/**
 * 阶段三：把用户确认过的正文原样提交到公众号草稿箱。
 *
 * 这里刻意不做任何 HTML 转换——content 就是预览页显示的那一份，由 news-engine 的
 * 块渲染器产出。任何在这里的二次加工都会破坏「预览即草稿」。
 *
 * stdin  { userId, title, author?, digest, content, contentSourceUrl, thumb: { url?, localPath? } }
 * stdout { ok, draftMediaId }
 */
import fs from 'node:fs';
import process from 'node:process';
import {
  addWechatDraftArticle,
  uploadWechatPermanentThumb,
} from '../wechat-news-morning-draft.mjs';
import {
  createLightContext,
  loadPushEnvironment,
  readStdinPayload,
  runScript,
} from './news-item-wechat-context.mjs';

const PLACEHOLDER_SVG = '<svg xmlns="http://www.w3.org/2000/svg" width="900" height="900">'
  + '<rect width="900" height="900" fill="#1a1a2e"/>'
  + '<text x="50%" y="50%" fill="#fff" font-size="42" text-anchor="middle" dominant-baseline="middle">TKMind</text>'
  + '</svg>';

async function loadThumbBuffer(thumb) {
  const sharp = (await import('sharp')).default;
  let raw = null;
  const localPath = String(thumb?.localPath ?? '').trim();
  const url = String(thumb?.url ?? '').trim();
  if (localPath && fs.existsSync(localPath)) {
    raw = fs.readFileSync(localPath);
  } else if (/^https?:\/\//i.test(url)) {
    const response = await fetch(url, { signal: AbortSignal.timeout(20_000) });
    if (response.ok) raw = Buffer.from(await response.arrayBuffer());
  }
  if (!raw) return sharp(Buffer.from(PLACEHOLDER_SVG)).png().toBuffer();
  return sharp(raw).resize(900, 900, { fit: 'cover' }).png().toBuffer();
}

async function main() {
  const env = loadPushEnvironment(process.env);
  const payload = readStdinPayload();
  const userId = String(payload.userId ?? '').trim();
  const title = String(payload.title ?? '').trim();
  const content = String(payload.content ?? '').trim();
  if (!userId) throw new Error('缺少 userId');
  if (!title) throw new Error('缺少草稿标题');
  if (!content) throw new Error('缺少草稿正文');

  const context = createLightContext(env);
  try {
    const { credentials, accessToken } = await context.resolveWechat(userId);
    const { wechatFetch } = context;
    const thumbMediaId = await uploadWechatPermanentThumb(
      accessToken,
      await loadThumbBuffer(payload.thumb),
      { wechatFetch },
    );
    const draft = await addWechatDraftArticle(accessToken, {
      title: title.slice(0, 64),
      author: String(payload.author ?? '').trim() || credentials.author || 'TKMind',
      digest: String(payload.digest ?? '').slice(0, 120),
      content,
      content_source_url: String(payload.contentSourceUrl ?? '').trim() || undefined,
      thumb_media_id: thumbMediaId,
      need_open_comment: 0,
      only_fans_can_comment: 0,
    }, { wechatFetch });
    return { draftMediaId: draft.draftMediaId, thumbMediaId };
  } finally {
    await context.close();
  }
}

runScript(main);