/**
 * GET /api/tasks - List all available tasks with user completion status
 */

import { NextRequest, NextResponse } from 'next/server';
import { requireAuth } from '@/app/lib/auth';
import { getActiveTasks, getUserCompletedTasks } from '@/app/lib/db/store';
import { TasksResponse, ApiResponse } from '@/app/lib/types';

export async function GET(request: NextRequest) {
  try {
    // Authenticate user
    const user = requireAuth(request);

    // Get all active tasks
    const available = getActiveTasks();

    // Get user's completed tasks
    const completed = getUserCompletedTasks(user.id);

    const response: TasksResponse = {
      available,
      completed
    };

    return NextResponse.json<ApiResponse<TasksResponse>>(
      {
        success: true,
        data: response
      },
      { status: 200 }
    );
  } catch (error) {
    if (error instanceof Error && error.message === 'Unauthorized') {
      return NextResponse.json<ApiResponse>(
        {
          success: false,
          error: 'Unauthorized'
        },
        { status: 401 }
      );
    }

    console.error('Get tasks error:', error);
    return NextResponse.json<ApiResponse>(
      {
        success: false,
        error: 'Internal server error'
      },
      { status: 500 }
    );
  }
}