/**
 * Shared pricing utilities for converting backend Plan data to PricingPlan format
 * Used by both marketing pricing page and app's plans page
 */

import { PricingPlan } from '../components/ui/pricing-table';

export interface Plan {
  id: number;
  name: string;
  slug?: string;
  price: number | string;
  original_price?: number | string;
  annual_discount_percent?: number;
  is_featured?: boolean;
  max_sites?: number;
  max_users?: number;
  max_keywords?: number;
  max_ahrefs_queries?: number;
  included_credits?: number;
}

export const formatNumber = (num: number | undefined | null): string => {
  if (!num || num === 0) return '0';
  if (num >= 1000000) return `${(num / 1000).toFixed(0)}M`;
  if (num >= 1000) return `${(num / 1000).toFixed(0)}K`;
  return num.toString();
};

export const convertToPricingPlan = (plan: Plan): PricingPlan => {
  const monthlyPrice = typeof plan.price === 'number' ? plan.price : parseFloat(String(plan.price || 0));
  const features: string[] = [];
  
  // Dynamic counts - shown with numbers from backend
  if (plan.max_keywords) {
    features.push(`**${formatNumber(plan.max_keywords)} Keywords**`);
  }
  if (plan.max_sites) {
    features.push(`${plan.max_sites === 999999 ? 'Unlimited' : formatNumber(plan.max_sites)} Site${plan.max_sites > 1 && plan.max_sites !== 999999 ? 's' : ''}`);
  }
  if (plan.max_users) {
    features.push(`${formatNumber(plan.max_users)} Team User${plan.max_users > 1 ? 's' : ''}`);
  }
  
  // Features - shown with checkmarks only (no counts)
  features.push('AI Keyword Clustering');
  features.push('AI Content Ideas');
  features.push('AI Image Generation');
  features.push('Internal Linking');
  features.push('SEO Optimization');
  features.push('WordPress Publishing');
  features.push('Pre-Researched High-Opportunity Keywords');
  
  // Priority Support - only for Scale plan (excluded for others)
  const planName = plan.name.toLowerCase();
  if (planName.includes('scale')) {
    features.push('Priority Support');
  } else {
    features.push('!Priority Support');
  }
  
  // Custom descriptions based on plan name
  let description = `Perfect for ${plan.name.toLowerCase()} needs`;
  if (plan.name.toLowerCase().includes('free')) {
    description = 'Explore core features risk free';
  } else if (plan.name.toLowerCase().includes('starter')) {
    description = 'Launch SEO workflows for small teams';
  } else if (plan.name.toLowerCase().includes('growth')) {
    description = 'Scale content production with confidence';
  } else if (plan.name.toLowerCase().includes('scale')) {
    description = 'Enterprise power for high volume growth';
  }
  
  return {
    id: plan.id,
    slug: plan.slug,
    name: plan.name,
    monthlyPrice: monthlyPrice,
    price: monthlyPrice,
    originalPrice: plan.original_price ? (typeof plan.original_price === 'number' ? plan.original_price : parseFloat(String(plan.original_price))) : undefined,
    annualDiscountPercent: plan.annual_discount_percent || 15,
    period: '/month',
    description: description,
    features,
    buttonText: monthlyPrice === 0 ? 'Free Trial' : 'Choose Plan',
    highlighted: plan.is_featured || false,
  };
};