/**
 * 删除重复的项目
 * 用途：查找并删除标题相同的重复项目，保留最新的一个
 * 
 * 使用方法：
 * 1. 在 Parse Dashboard 的 Cloud Code 页面运行此脚本
 * 2. 或者通过 API 调用：POST /parse/functions/removeDuplicateProjects
 */

Parse.Cloud.define('removeDuplicateProjects', async (request) => {
  const { title, dryRun = true } = request.params;
  
  console.log('🔍 开始查找重复项目...');
  console.log('查询条件:', { title, dryRun: dryRun ? '预览模式' : '执行删除' });
  
  try {
    const query = new Parse.Query('Project');
    
    // 如果提供了 title，只查找该标题的项目
    if (title) {
      query.equalTo('title', title);
    }
    
    query.notEqualTo('isDeleted', true);
    query.ascending('createdAt'); // 按创建时间升序，保留最新的
    query.limit(1000);
    
    const projects = await query.find({ useMasterKey: true });
    console.log(`📊 找到 ${projects.length} 个项目`);
    
    // 按标题分组
    const projectsByTitle = new Map();
    projects.forEach(project => {
      const projectTitle = project.get('title') || '无标题';
      if (!projectsByTitle.has(projectTitle)) {
        projectsByTitle.set(projectTitle, []);
      }
      projectsByTitle.get(projectTitle).push(project);
    });
    
    // 查找重复的项目
    const duplicates = [];
    const summary = [];
    
    for (const [projectTitle, projectList] of projectsByTitle.entries()) {
      if (projectList.length > 1) {
        console.log(`\n⚠️ 发现重复项目: "${projectTitle}" (${projectList.length} 个)`);
        
        // 按创建时间排序，保留最新的
        projectList.sort((a, b) => {
          const aTime = a.get('createdAt') || a.createdAt;
          const bTime = b.get('createdAt') || b.createdAt;
          return bTime.getTime() - aTime.getTime();
        });
        
        // 第一个是最新的，保留
        const keepProject = projectList[0];
        const deleteProjects = projectList.slice(1);
        
        console.log(`  ✅ 保留: ${keepProject.id} (创建于: ${keepProject.get('createdAt')})`);
        
        deleteProjects.forEach(project => {
          console.log(`  ❌ 删除: ${project.id} (创建于: ${project.get('createdAt')})`);
          duplicates.push({
            id: project.id,
            title: projectTitle,
            createdAt: project.get('createdAt'),
            currentStage: project.get('currentStage'),
            status: project.get('status')
          });
          
          if (!dryRun) {
            // 标记为已删除
            project.set('isDeleted', true);
            project.set('deletedAt', new Date());
            project.set('deleteReason', '重复项目（自动清理）');
          }
        });
        
        summary.push({
          title: projectTitle,
          total: projectList.length,
          kept: 1,
          deleted: deleteProjects.length,
          keptProjectId: keepProject.id
        });
      }
    }
    
    // 执行删除
    if (!dryRun && duplicates.length > 0) {
      const projectsToDelete = duplicates.map(d => {
        const project = new Parse.Object('Project');
        project.id = d.id;
        project.set('isDeleted', true);
        project.set('deletedAt', new Date());
        project.set('deleteReason', '重复项目（自动清理）');
        return project;
      });
      
      await Parse.Object.saveAll(projectsToDelete, { useMasterKey: true });
      console.log(`\n✅ 已删除 ${duplicates.length} 个重复项目`);
    }
    
    return {
      success: true,
      dryRun,
      summary: {
        totalProjects: projects.length,
        duplicatesFound: duplicates.length,
        titlesWithDuplicates: summary.length
      },
      details: summary,
      duplicates: duplicates.map(d => ({
        id: d.id,
        title: d.title,
        createdAt: d.createdAt,
        stage: d.currentStage,
        status: d.status
      }))
    };
    
  } catch (error) {
    console.error('❌ 删除重复项目失败:', error);
    throw new Parse.Error(Parse.Error.INTERNAL_SERVER_ERROR, `删除失败: ${error.message}`);
  }
});

/**
 * 删除指定的单个项目（用于手动删除）
 */
Parse.Cloud.define('deleteProjectById', async (request) => {
  const { projectId, reason = '手动删除' } = request.params;
  
  if (!projectId) {
    throw new Parse.Error(Parse.Error.INVALID_QUERY, '缺少 projectId 参数');
  }
  
  try {
    const query = new Parse.Query('Project');
    const project = await query.get(projectId, { useMasterKey: true });
    
    if (!project) {
      throw new Parse.Error(Parse.Error.OBJECT_NOT_FOUND, '项目不存在');
    }
    
    const projectTitle = project.get('title');
    console.log(`🗑️ 删除项目: ${projectTitle} (${projectId})`);
    
    // 软删除
    project.set('isDeleted', true);
    project.set('deletedAt', new Date());
    project.set('deleteReason', reason);
    
    await project.save(null, { useMasterKey: true });
    
    return {
      success: true,
      message: `项目 "${projectTitle}" 已删除`,
      projectId: projectId,
      title: projectTitle
    };
    
  } catch (error) {
    console.error('❌ 删除项目失败:', error);
    throw new Parse.Error(Parse.Error.INTERNAL_SERVER_ERROR, `删除失败: ${error.message}`);
  }
});

/**
 * 查找指定标题的所有项目（用于预览）
 */
Parse.Cloud.define('findProjectsByTitle', async (request) => {
  const { title } = request.params;
  
  if (!title) {
    throw new Parse.Error(Parse.Error.INVALID_QUERY, '缺少 title 参数');
  }
  
  try {
    const query = new Parse.Query('Project');
    query.equalTo('title', title);
    query.notEqualTo('isDeleted', true);
    query.ascending('createdAt');
    query.limit(100);
    
    const projects = await query.find({ useMasterKey: true });
    
    return {
      success: true,
      total: projects.length,
      projects: projects.map(p => ({
        id: p.id,
        title: p.get('title'),
        createdAt: p.get('createdAt'),
        currentStage: p.get('currentStage'),
        status: p.get('status'),
        assignee: p.get('assignee')?.get('name') || '未分配'
      }))
    };
    
  } catch (error) {
    console.error('❌ 查找项目失败:', error);
    throw new Parse.Error(Parse.Error.INTERNAL_SERVER_ERROR, `查找失败: ${error.message}`);
  }
});