// server/api/members/dues-status.get.ts
export default defineEventHandler(async (event) => {
  try {
    const { getMembers } = await import('~/server/utils/nocodb');

    // Get all members
    const allMembers = await getMembers();
    
    if (!allMembers?.list) {
      return {
        success: true,
        data: {
          overdue: [],
          upcoming: []
        }
      };
    }

    const today = new Date();
    const thirtyDaysFromNow = new Date();
    thirtyDaysFromNow.setDate(today.getDate() + 30);

    const overdueMembers: any[] = [];
    const upcomingMembers: any[] = [];
    const severelyOverdueMembers: any[] = [];

    for (const member of allMembers.list) {
      // Check for severely overdue members (more than 1 year past due date)
      let isSeverelyOverdue = false;
      
      if (member.current_year_dues_paid === 'true' && member.membership_date_paid) {
        // If dues are marked as paid, check if it's been more than 1 year since payment
        const lastPaidDate = new Date(member.membership_date_paid);
        const oneYearFromPayment = new Date(lastPaidDate);
        oneYearFromPayment.setFullYear(oneYearFromPayment.getFullYear() + 1);
        
        if (today > oneYearFromPayment) {
          isSeverelyOverdue = true;
        }
      } else if (member.current_year_dues_paid !== 'true') {
        // If dues are not paid, check payment due date or member since date
        let dueDate: Date;
        
        if (member.payment_due_date) {
          dueDate = new Date(member.payment_due_date);
        } else if (member.member_since) {
          // Fallback: 1 year from member since date
          dueDate = new Date(member.member_since);
          dueDate.setFullYear(dueDate.getFullYear() + 1);
        } else {
          // Skip if we can't determine due date
          continue;
        }
        
        // Check if more than 1 year overdue
        const oneYearOverdue = new Date(dueDate);
        oneYearOverdue.setFullYear(oneYearOverdue.getFullYear() + 1);
        
        if (today > oneYearOverdue) {
          isSeverelyOverdue = true;
        }
      }

      if (isSeverelyOverdue) {
        severelyOverdueMembers.push(member);
        continue; // Don't add to other lists
      }

      // Skip if dues are already paid (and not severely overdue)
      if (member.current_year_dues_paid === 'true') {
        continue;
      }

      // Check if member has a payment due date
      if (member.payment_due_date) {
        const dueDate = new Date(member.payment_due_date);
        
        if (dueDate < today) {
          // Overdue (but not severely overdue)
          overdueMembers.push(member);
        } else if (dueDate <= thirtyDaysFromNow) {
          // Due within 30 days
          upcomingMembers.push(member);
        }
      }
    }

    // Sort by due date (most overdue/earliest due first)
    overdueMembers.sort((a, b) => {
      const dateA = new Date(a.payment_due_date);
      const dateB = new Date(b.payment_due_date);
      return dateA.getTime() - dateB.getTime();
    });

    upcomingMembers.sort((a, b) => {
      const dateA = new Date(a.payment_due_date);
      const dateB = new Date(b.payment_due_date);
      return dateA.getTime() - dateB.getTime();
    });

    return {
      success: true,
      data: {
        overdue: overdueMembers,
        upcoming: upcomingMembers
      }
    };

  } catch (error: any) {
    console.error('[API] Error fetching dues status:', error);
    
    throw createError({
      statusCode: error.statusCode || 500,
      statusMessage: error.message || 'Failed to fetch dues status'
    });
  }
});