ai-scoring-application/app/api/criteria-templates/[id]/route.ts

import { NextRequest, NextResponse } from 'next/server';
import { CriteriaTemplateService, CriteriaItemService } from '@/lib/services/database';

// GET - 獲取特定評分標準模板
export async function GET(
  request: NextRequest,
  { params }: { params: { id: string } }
) {
  try {
    const templateId = parseInt(params.id);
    
    if (isNaN(templateId)) {
      return NextResponse.json(
        { success: false, error: '無效的模板 ID' },
        { status: 400 }
      );
    }

    const template = await CriteriaTemplateService.findWithItems(templateId);
    
    if (!template) {
      return NextResponse.json(
        { success: false, error: '找不到指定的評分標準模板' },
        { status: 404 }
      );
    }

    return NextResponse.json({
      success: true,
      data: template
    });
  } catch (error) {
    console.error('獲取評分標準模板失敗:', error);
    return NextResponse.json(
      { success: false, error: '獲取評分標準模板失敗' },
      { status: 500 }
    );
  }
}

// PUT - 更新評分標準模板
export async function PUT(
  request: NextRequest,
  { params }: { params: { id: string } }
) {
  try {
    const templateId = parseInt(params.id);
    
    if (isNaN(templateId)) {
      return NextResponse.json(
        { success: false, error: '無效的模板 ID' },
        { status: 400 }
      );
    }

    const body = await request.json();
    const { name, description, items } = body;

    if (!name || !items || !Array.isArray(items)) {
      return NextResponse.json(
        { success: false, error: '請提供模板名稱和評分項目' },
        { status: 400 }
      );
    }

    // 驗證權重總和
    const totalWeight = items.reduce((sum: number, item: any) => sum + (item.weight || 0), 0);
    if (Math.abs(totalWeight - 100) > 0.01) {
      return NextResponse.json(
        { success: false, error: '權重總和必須等於 100%' },
        { status: 400 }
      );
    }

    // 驗證所有項目都有名稱
    if (items.some((item: any) => !item.name?.trim())) {
      return NextResponse.json(
        { success: false, error: '所有評分項目都必須有名稱' },
        { status: 400 }
      );
    }

    // 使用事務更新模板和項目
    const { transaction } = await import('@/lib/database');
    
    await transaction(async (connection) => {
      // 更新模板
      await connection.execute(
        'UPDATE criteria_templates SET name = ?, description = ?, total_weight = ?, updated_at = NOW() WHERE id = ?',
        [name, description || '', totalWeight, templateId]
      );
      
      // 刪除舊的評分項目
      await connection.execute(
        'DELETE FROM criteria_items WHERE template_id = ?',
        [templateId]
      );
      
      // 創建新的評分項目
      for (let i = 0; i < items.length; i++) {
        const item = items[i];
        await connection.execute(
          'INSERT INTO criteria_items (template_id, name, description, weight, max_score, sort_order) VALUES (?, ?, ?, ?, ?, ?)',
          [
            templateId,
            item.name,
            item.description || '',
            item.weight,
            item.maxScore || 10,
            i + 1
          ]
        );
      }
    });

    return NextResponse.json({
      success: true,
      message: '評分標準模板更新成功'
    });
  } catch (error) {
    console.error('更新評分標準模板失敗:', error);
    return NextResponse.json(
      { success: false, error: '更新評分標準模板失敗' },
      { status: 500 }
    );
  }
}

// DELETE - 刪除評分標準模板
export async function DELETE(
  request: NextRequest,
  { params }: { params: { id: string } }
) {
  try {
    const templateId = parseInt(params.id);
    
    if (isNaN(templateId)) {
      return NextResponse.json(
        { success: false, error: '無效的模板 ID' },
        { status: 400 }
      );
    }

    // 檢查是否為預設模板
    const template = await CriteriaTemplateService.findById(templateId);
    if (template?.is_default) {
      return NextResponse.json(
        { success: false, error: '無法刪除預設模板' },
        { status: 400 }
      );
    }

    await CriteriaTemplateService.delete(templateId);

    return NextResponse.json({
      success: true,
      message: '評分標準模板刪除成功'
    });
  } catch (error) {
    console.error('刪除評分標準模板失敗:', error);
    return NextResponse.json(
      { success: false, error: '刪除評分標準模板失敗' },
      { status: 500 }
    );
  }
}