/**
 * 演示数据播种脚本 —— 供管理端界面、Windows 客户端联调与集成测试使用。
 *
 * 与 smoke.mjs 不同：本脚本**保留**数据并把三类资产都置为 published，
 * 使 GET /api/catalog/export 能返回可用于客户端联调的完整目录。
 *
 * 用法：
 *   API_BASE=http://127.0.0.1:3000 node test/seed.mjs
 *
 * 幂等：重复执行只会追加新记录，不会破坏既有数据。
 */

import { readFileSync } from 'node:fs';
import { dirname, join } from 'node:path';
import { fileURLToPath } from 'node:url';

const here = dirname(fileURLToPath(import.meta.url));
const API = process.env.API_BASE ?? 'http://127.0.0.1:3000';

const SOURCE = {
  sourceType: 'original',
  sourceName: 'OpenDance 官方示例库',
  sourceUrl: 'https://example.com/opendance/samples',
  license: 'CC-BY-4.0',
  author: 'OpenDance Studio',
};

async function request(method, path, { json, form } = {}) {
  const init = { method };
  if (json !== undefined) {
    init.headers = { 'Content-Type': 'application/json' };
    init.body = JSON.stringify(json);
  }
  if (form !== undefined) init.body = form;
  const res = await fetch(`${API}${path}`, init);
  const text = await res.text();
  let body = null;
  try {
    body = text ? JSON.parse(text) : null;
  } catch {
    body = text;
  }
  return { status: res.status, body };
}

function fileForm(fields, filename, content, mime = 'application/octet-stream') {
  const form = new FormData();
  for (const [key, value] of Object.entries(fields)) form.append(key, String(value));
  form.append('file', new Blob([content], { type: mime }), filename);
  return form;
}

function buildGlb(json) {
  const jsonBuf = Buffer.from(JSON.stringify(json), 'utf8');
  const padded = Buffer.concat([jsonBuf, Buffer.alloc((4 - (jsonBuf.length % 4)) % 4, 0x20)]);
  const header = Buffer.alloc(12);
  header.write('glTF', 0, 'ascii');
  header.writeUInt32LE(2, 4);
  header.writeUInt32LE(12 + 8 + padded.length, 8);
  const chunk = Buffer.alloc(8);
  chunk.writeUInt32LE(padded.length, 0);
  chunk.writeUInt32LE(0x4e4f534a, 4);
  return Buffer.concat([header, chunk, padded]);
}

async function publish(targetType, id, reviewer = 'seed') {
  const submit = await request('POST', `/api/reviews/${targetType}/${id}/submit`, { json: { reviewer } });
  if (submit.status === 409) return submit; // 已处于目标状态
  const approve = await request('POST', `/api/reviews/${targetType}/${id}/approve`, {
    json: { reviewer, comment: '演示数据自动发布' },
  });
  return approve;
}

async function main() {
  console.log(`\n== 播种演示数据 @ ${API} ==\n`);

  const health = await request('GET', '/health');
  if (health.status !== 200) {
    console.error('服务端不可达，先启动：cd web-server && npm run start:prod');
    process.exit(1);
  }
  console.log(`服务端正常，数据库 ${health.body.database.server}`);

  // ---------- 曲目 ----------
  const song = await request('POST', '/api/songs', {
    json: {
      title: '示例曲目 · 小星星（Demo）',
      artist: 'OpenDance 示例',
      album: '客户端联调样例',
      language: 'instrumental',
      durationMs: 96000,
      bpm: 100,
      difficulty: 2,
      tags: ['示例', '联调', '儿童'],
      ...SOURCE,
    },
  });
  if (song.status !== 201) {
    console.error('创建曲目失败：', song.status, song.body);
    process.exit(1);
  }
  const songId = song.body.id;
  console.log(`  曲目 #${songId} ${song.body.title}`);

  await publish('song', songId);

  // ---------- 动作（BVH + 预处理） ----------
  const bvh = readFileSync(join(here, 'fixtures', 'sample.bvh'));
  const motion = await request('POST', '/api/motions', {
    form: fileForm(
      { name: '示例动作 · 挥手深蹲（Demo）', songId, fps: 30, ...SOURCE },
      'sample.bvh',
      bvh,
      'text/plain',
    ),
  });
  if (motion.status !== 201) {
    console.error('上传动作失败：', motion.status, motion.body);
    process.exit(1);
  }
  const motionId = motion.body.id;
  console.log(`  动作 #${motionId} ${motion.body.name}`);

  const pre = await request('POST', `/api/motions/${motionId}/preprocess`);
  if (pre.status !== 200) {
    console.error('预处理失败：', pre.status, pre.body);
    process.exit(1);
  }
  console.log(`    预处理完成：${pre.body.keypointFrames} 帧 × 33 点，fps=${pre.body.fps}`);
  await publish('motion', motionId);

  // ---------- 模型（VRM 优先） ----------
  const vrm = buildGlb({
    asset: { version: '2.0', generator: 'OpenDance seed' },
    extensions: { VRMC_vrm: { specVersion: '1.0' } },
    meshes: [],
    nodes: [],
    scenes: [{ nodes: [] }],
    scene: 0,
  });
  const model = await request('POST', '/api/models', {
    form: fileForm(
      { name: '示例模型 · VRM 1.0 占位（Demo）', isPrimary: true, ...SOURCE },
      'demo-avatar.vrm',
      vrm,
      'model/gltf-binary',
    ),
  });
  if (model.status !== 201) {
    console.error('上传模型失败：', model.status, model.body);
    process.exit(1);
  }
  const modelId = model.body.id;
  console.log(`  模型 #${modelId} ${model.body.name}（vrmVersion=${model.body.vrmVersion}）`);
  await publish('model', modelId);

  // ---------- 校验目录导出 ----------
  const bundle = await request('GET', '/api/catalog/export');
  const summary = {
    songs: bundle.body.songs.length,
    motions: bundle.body.motions.length,
    models: bundle.body.models.length,
    defaultModelId: bundle.body.defaultModelId,
  };
  console.log('\n已发布目录：', JSON.stringify(summary));

  const scorable = bundle.body.motions.filter((m) => m.preprocessState === 'done');
  if (scorable.length === 0) {
    console.error('目录中没有可评分动作，客户端集成测试将被跳过');
    process.exit(1);
  }

  console.log('\n完成。Windows 客户端现在可联调：');
  console.log(`  可评分动作：${scorable.map((m) => `#${m.id}(${m.keypointFrames} 帧)`).join(', ')}`);
  console.log(`  默认模型：#${bundle.body.defaultModelId}`);
  console.log('');
}

main().catch((err) => {
  console.error('播种失败：', err);
  process.exit(1);
});