import { NextRequest, NextResponse } from 'next/server'
import { cookies } from 'next/headers'
import pool from '@/lib/db'

// GET /api/referral-points - Get current user's referral points and settings
export async function GET(request: NextRequest) {
  try {
    const cookieStore = await cookies()
    const buyerIdCookie = cookieStore.get('buyer_id')?.value

    if (!buyerIdCookie) {
      return NextResponse.json(
        { error: 'Authentication required' },
        { status: 401 }
      )
    }

    const buyer_id = parseInt(buyerIdCookie, 10)

    // Get buyer's referral points
    const [buyerRows] = await pool.execute(
      'SELECT referral_points FROM buyers WHERE id = ?',
      [buyer_id]
    )
    const buyers = buyerRows as any[]
    if (buyers.length === 0) {
      return NextResponse.json(
        { error: 'Buyer not found' },
        { status: 404 }
      )
    }

    const referralPoints = parseFloat(buyers[0].referral_points) || 0

    // Get referral settings
    const [settingsRows] = await pool.execute(
      'SELECT setting_key, setting_value FROM referral_settings'
    )
    const settings = settingsRows as any[]
    
    const pointsToChf = parseFloat(
      settings.find(s => s.setting_key === 'points_to_chf')?.setting_value || '100'
    )
    const pointsPerChf = parseFloat(
      settings.find(s => s.setting_key === 'points_per_chf')?.setting_value || '10'
    )
    const pointsToCryptoChf = parseFloat(
      settings.find(s => s.setting_key === 'points_to_crypto_chf')?.setting_value || '100'
    )
    const minRedemptionPoints = parseFloat(
      settings.find(s => s.setting_key === 'min_redemption_points')?.setting_value || '1000'
    )

    // Calculate maximum discount available
    const maxDiscountChf = referralPoints / pointsToChf

    return NextResponse.json({
      referral_points: referralPoints,
      points_to_chf: pointsToChf,
      points_per_chf: pointsPerChf,
      points_to_crypto_chf: pointsToCryptoChf,
      min_redemption_points: minRedemptionPoints,
      max_discount_chf: maxDiscountChf,
    })
  } catch (error) {
    console.error('Error fetching referral points:', error)
    return NextResponse.json(
      { error: 'Failed to fetch referral points' },
      { status: 500 }
    )
  }
}