/**
 * 状态同步脚本：将现有数据从旧字段同步到 genStage
 * 使用 stage-manager 的安全函数
 * Run: npx ts-node prisma/sync-genstage.ts
 */

import { PrismaClient } from '@prisma/client';
import {
  BookGenStage,
  ChapterGenStage,
  bookStageIndex,
  chapterStageIndex,
  safeTransitionChapter,
  safeTransitionBook,
  checkAndRegressBook,
  tryAdvanceBook,
} from '../src/modules/book-generator/stage-manager';

const prisma = new PrismaClient();

async function syncChapter(chapter: any): Promise<void> {
  const chapterAny = chapter as any;
  let targetStage: ChapterGenStage;

  // 根据旧字段计算新的 genStage
  if (chapterAny.videoStatus === 'completed') {
    targetStage = 'video_completed';
  } else if (chapterAny.videoStatus === 'generating') {
    targetStage = 'video_generating';
  } else if (chapterAny.audioStatus === 'completed') {
    targetStage = 'audio_completed';
  } else if (chapterAny.audioStatus === 'generating') {
    targetStage = 'audio_generating';
  } else if (chapterAny.contentStatus === 'completed') {
    targetStage = 'content_completed';
  } else if (chapterAny.contentStatus === 'generating') {
    targetStage = 'content_generating';
  } else if (chapterAny.status === 'completed') {
    // 只有章级别的 status
    targetStage = 'content_completed';
  } else if (chapterAny.status === 'failed' || chapterAny.contentStatus === 'failed' || chapterAny.audioStatus === 'failed' || chapterAny.videoStatus === 'failed') {
    targetStage = 'failed';
  } else {
    targetStage = 'idle';
  }

  const currentStage = chapterAny.genStage as ChapterGenStage;

  // 如果相同则跳过
  if (currentStage === targetStage) {
    console.log(`  Chapter ${chapter.id}: 无需更新 (${currentStage})`);
    return;
  }

  // 比较阶段索引决定用哪个函数
  const currentIdx = chapterStageIndex(currentStage);
  const targetIdx = chapterStageIndex(targetStage);

  try {
    if (targetIdx > currentIdx) {
      // 前进用 safeTransitionChapter（内部已处理乐观锁）
      await safeTransitionChapter(chapter.id, currentStage, targetStage);
    } else {
      // 回退/同级也用 safeTransitionChapter（重新生成场景）
      await safeTransitionChapter(chapter.id, currentStage, targetStage);
    }
    console.log(`  Chapter ${chapter.id}: ${currentStage} → ${targetStage}`);
  } catch (error: any) {
    // 并发冲突：跳过此记录
    console.log(`  Chapter ${chapter.id}: 跳过 (${error.message})`);
  }
}

async function syncBook(book: any): Promise<void> {
  let targetStage: BookGenStage;

  switch (book.status) {
    case 'draft':
      targetStage = 'draft';
      break;
    case 'planning':
      targetStage = 'outline_completed';
      break;
    case 'generating':
      targetStage = inferBookGenStage(book);
      break;
    case 'completed':
      targetStage = inferBookGenStage(book);
      break;
    case 'failed':
    case 'interrupted':
      targetStage = 'failed';
      break;
    default:
      targetStage = 'draft';
  }

  const currentStage = (book.genStage || 'draft') as BookGenStage;

  if (currentStage === targetStage) {
    console.log(`  Book ${book.id}: 无需更新 (${currentStage})`);
    return;
  }

  try {
    await safeTransitionBook(book.id, currentStage, targetStage);
    console.log(`  Book ${book.id}: ${currentStage} → ${targetStage}`);
  } catch (error: any) {
    console.log(`  Book ${book.id}: 跳过 (${error.message})`);
  }
}

function inferBookGenStage(book: any): BookGenStage {
  // 根据 chapters 状态推断
  const chapters = book.chapters || [];
  const hasVideo = chapters.some((c: any) => c.genStage === 'video_completed' || c.videoStatus === 'completed');
  if (hasVideo) return 'video_completed';

  const hasAudio = chapters.some((c: any) => c.genStage === 'audio_completed' || c.audioStatus === 'completed');
  if (hasAudio) return 'audio_completed';

  const hasContent = chapters.some((c: any) => c.genStage === 'content_completed' || c.contentStatus === 'completed');
  if (hasContent) return 'content_generating';

  return 'content_generating';
}

async function main() {
  console.log('开始状态同步...\n');

  // 同步 BookChapter
  console.log('=== 同步 BookChapter ===');
  const chapters = await prisma.bookChapter.findMany();
  for (const chapter of chapters) {
    await syncChapter(chapter);
  }
  console.log(`BookChapter 同步完成: ${chapters.length} 条\n`);

  // 同步 Book
  console.log('=== 同步 Book ===');
  const books = await prisma.book.findMany({ include: { chapters: true } });
  for (const book of books) {
    await syncBook(book);
  }
  console.log(`Book 同步完成: ${books.length} 条\n`);

  // 执行 Book 联动回退检查
  console.log('=== 检查 Book 联动回退 ===');
  for (const book of books) {
    await checkAndRegressBook(book.id);
  }

  console.log('✅ 状态同步完成!');
}

main()
  .catch(console.error)
  .finally(() => prisma.$disconnect());