feat: Ultimate plan switcher in settings

frontend/src/app/terminal/settings/page.tsx

@@ -22,12 +22,93 @@ import {
   TrendingUp,
   X,
   Settings,
+  ArrowUp,
+  ArrowDown,
+  Sparkles,
+  Clock,
+  Target,
+  BarChart3,
+  MessageSquare,
+  Database,
 } from 'lucide-react'
 import Link from 'next/link'
 import clsx from 'clsx'
 
 type SettingsTab = 'profile' | 'notifications' | 'billing' | 'security'
 
+// Plan definitions
+const PLANS = [
+  {
+    id: 'scout',
+    name: 'Scout',
+    icon: Zap,
+    price: 0,
+    period: 'forever',
+    description: 'Perfect for getting started',
+    color: 'white',
+    features: [
+      { icon: Target, text: '5 Watchlist Domains' },
+      { icon: Clock, text: 'Daily Checks' },
+      { icon: Bell, text: '2 Sniper Alerts' },
+      { icon: BarChart3, text: 'Basic Market Data' },
+    ],
+    limits: {
+      domains: 5,
+      alerts: 2,
+      listings: 0,
+      portfolio: 0,
+    }
+  },
+  {
+    id: 'trader',
+    name: 'Trader',
+    icon: TrendingUp,
+    price: 9,
+    period: '/month',
+    description: 'For serious domain investors',
+    color: 'accent',
+    badge: 'Popular',
+    features: [
+      { icon: Target, text: '50 Watchlist Domains' },
+      { icon: Clock, text: 'Hourly Checks' },
+      { icon: Bell, text: '10 Sniper Alerts' },
+      { icon: Sparkles, text: 'Domain Valuation' },
+      { icon: Database, text: '25 Portfolio Domains' },
+      { icon: MessageSquare, text: '5 Marketplace Listings' },
+    ],
+    limits: {
+      domains: 50,
+      alerts: 10,
+      listings: 5,
+      portfolio: 25,
+    }
+  },
+  {
+    id: 'tycoon',
+    name: 'Tycoon',
+    icon: Crown,
+    price: 29,
+    period: '/month',
+    description: 'Maximum power & control',
+    color: 'amber',
+    badge: 'Full Power',
+    features: [
+      { icon: Target, text: '500 Watchlist Domains' },
+      { icon: Clock, text: '10-Minute Checks' },
+      { icon: Bell, text: '50 Sniper Alerts' },
+      { icon: Sparkles, text: 'Full SEO Metrics' },
+      { icon: Database, text: 'Unlimited Portfolio' },
+      { icon: MessageSquare, text: '50 Featured Listings' },
+    ],
+    limits: {
+      domains: 500,
+      alerts: 50,
+      listings: 50,
+      portfolio: -1,
+    }
+  },
+]
+
 export default function SettingsPage() {
   const router = useRouter()
   const { user, isAuthenticated, isLoading, checkAuth, subscription } = useStore()
@@ -52,6 +133,7 @@ export default function SettingsPage() {
   const [priceAlerts, setPriceAlerts] = useState<PriceAlert[]>([])
   const [loadingAlerts, setLoadingAlerts] = useState(false)
   const [deletingAlertId, setDeletingAlertId] = useState<number | null>(null)
+  const [changingPlan, setChangingPlan] = useState<string | null>(null)
 
   useEffect(() => {
     checkAuth()
@@ -153,6 +235,52 @@ export default function SettingsPage() {
     }
   }
 
+  const handlePlanChange = async (planId: string) => {
+    setChangingPlan(planId)
+    setError(null)
+    
+    try {
+      if (planId === 'scout') {
+        // Downgrade to free - cancel subscription
+        await api.cancelSubscription()
+        setSuccess('Downgraded to Scout. Your premium features will remain active until the end of your billing period.')
+        await checkAuth()
+      } else {
+        // Upgrade to paid plan
+        const successUrl = `${window.location.origin}/terminal/settings?upgraded=${planId}`
+        const cancelUrl = `${window.location.origin}/terminal/settings?cancelled=true`
+        const { checkout_url } = await api.createCheckoutSession(planId, successUrl, cancelUrl)
+        window.location.href = checkout_url
+      }
+    } catch (err) {
+      setError(err instanceof Error ? err.message : 'Failed to change plan')
+    } finally {
+      setChangingPlan(null)
+    }
+  }
+
+  // Handle URL params for upgrade success/cancel
+  useEffect(() => {
+    const params = new URLSearchParams(window.location.search)
+    const upgraded = params.get('upgraded')
+    const cancelled = params.get('cancelled')
+    
+    if (upgraded) {
+      setSuccess(`🎉 Welcome to ${upgraded.charAt(0).toUpperCase() + upgraded.slice(1)}! Your account has been upgraded.`)
+      setActiveTab('billing')
+      // Clean URL
+      window.history.replaceState({}, '', '/terminal/settings')
+      // Refresh subscription data
+      checkAuth()
+    }
+    
+    if (cancelled) {
+      setError('Checkout was cancelled. No changes were made.')
+      setActiveTab('billing')
+      window.history.replaceState({}, '', '/terminal/settings')
+    }
+  }, [])
+
   if (isLoading) {
     return (
       <div className="min-h-screen flex items-center justify-center bg-[#020202]">
@@ -429,85 +557,208 @@ export default function SettingsPage() {
             {/* Billing Tab */}
             {activeTab === 'billing' && (
               <div className="space-y-6">
+                {/* Plan Switcher */}
                 <div className="border border-white/[0.08] bg-white/[0.01] p-6">
-                  <h2 className="text-sm font-mono text-white/40 tracking-wide mb-6">Current Plan</h2>
-                  
-                  <div className="p-5 bg-accent/5 border border-accent/20 mb-6">
-                    <div className="flex items-center justify-between mb-4">
-                      <div className="flex items-center gap-3">
-                        {tierName === 'Tycoon' ? <Crown className="w-6 h-6 text-accent" /> : 
-                         tierName === 'Trader' ? <TrendingUp className="w-6 h-6 text-accent" /> : 
-                         <Zap className="w-6 h-6 text-accent" />}
-                        <div>
-                          <p className="text-lg font-display text-white">{tierName}</p>
-                          <p className="text-xs text-white/40">
-                            {tierName === 'Scout' ? 'Free forever' : tierName === 'Trader' ? '$9/month' : '$29/month'}
-                          </p>
-                        </div>
-                      </div>
-                      <span className={clsx(
-                        "px-2 py-1 text-[10px] font-mono",
-                        isProOrHigher ? "bg-accent/10 text-accent" : "bg-white/5 text-white/40"
-                      )}>
-                        {isProOrHigher ? 'Active' : 'Free'}
-                      </span>
-                    </div>
-                    
-                    {/* Plan Stats */}
-                    <div className="grid grid-cols-3 gap-4 p-4 bg-black/30 mb-4">
-                      <div className="text-center">
-                        <p className="text-xl font-display text-white">{subscription?.domain_limit || 5}</p>
-                        <p className="text-[10px] text-white/40 font-mono">Domains</p>
-                      </div>
-                      <div className="text-center border-x border-white/10">
-                        <p className="text-xl font-display text-white">
-                          {subscription?.check_frequency === 'realtime' ? '10m' : 
-                           subscription?.check_frequency === 'hourly' ? '1h' : '24h'}
-                        </p>
-                        <p className="text-[10px] text-white/40 font-mono">Interval</p>
-                      </div>
-                      <div className="text-center">
-                        <p className="text-xl font-display text-white">
-                          {subscription?.portfolio_limit === -1 ? '∞' : subscription?.portfolio_limit || 0}
-                        </p>
-                        <p className="text-[10px] text-white/40 font-mono">Portfolio</p>
-                      </div>
-                    </div>
-                    
-                    {isProOrHigher ? (
+                  <div className="flex items-center justify-between mb-6">
+                    <h2 className="text-sm font-mono text-white/40 tracking-wide">Choose Your Plan</h2>
+                    {isProOrHigher && (
                       <button
                         onClick={handleOpenBillingPortal}
-                        className="w-full flex items-center justify-center gap-2 py-3 bg-black/50 text-white text-sm font-medium border border-white/10 hover:border-white/20 transition-all"
+                        className="flex items-center gap-2 px-3 py-1.5 text-[10px] font-mono text-white/50 border border-white/10 hover:border-white/20 hover:text-white transition-all"
                       >
-                        <ExternalLink className="w-4 h-4" />
-                        Manage Subscription
+                        <ExternalLink className="w-3 h-3" />
+                        Manage Billing
                       </button>
-                    ) : (
-                      <Link
-                        href="/pricing"
-                        className="w-full flex items-center justify-center gap-2 py-3 bg-accent text-black text-sm font-semibold hover:bg-white transition-all"
-                      >
-                        <Zap className="w-4 h-4" />
-                        Upgrade Plan
-                      </Link>
                     )}
                   </div>
-
-                  {/* Plan Features */}
-                  <h3 className="text-xs font-mono text-white/40 mb-3">Includes</h3>
-                  <ul className="grid grid-cols-2 gap-2">
-                    {[
-                      `${subscription?.domain_limit || 5} Watchlist Domains`,
-                      `${subscription?.check_frequency === 'realtime' ? '10-minute' : subscription?.check_frequency === 'hourly' ? 'Hourly' : 'Daily'} Scans`,
-                      'Email Alerts',
-                      'TLD Price Data',
-                    ].map((feature) => (
-                      <li key={feature} className="flex items-center gap-2 text-xs">
-                        <Check className="w-3 h-3 text-accent" />
-                        <span className="text-white/60">{feature}</span>
-                      </li>
-                    ))}
-                  </ul>
+                  
+                  {/* Plan Cards */}
+                  <div className="grid grid-cols-1 lg:grid-cols-3 gap-4">
+                    {PLANS.map((plan) => {
+                      const isCurrent = tierName.toLowerCase() === plan.id
+                      const isUpgrade = 
+                        (tierName === 'Scout' && (plan.id === 'trader' || plan.id === 'tycoon')) ||
+                        (tierName === 'Trader' && plan.id === 'tycoon')
+                      const isDowngrade = 
+                        (tierName === 'Tycoon' && (plan.id === 'trader' || plan.id === 'scout')) ||
+                        (tierName === 'Trader' && plan.id === 'scout')
+                      
+                      return (
+                        <div
+                          key={plan.id}
+                          className={clsx(
+                            "relative p-5 border transition-all",
+                            isCurrent
+                              ? "border-accent bg-accent/5"
+                              : "border-white/[0.08] bg-white/[0.01] hover:border-white/20"
+                          )}
+                        >
+                          {/* Badge */}
+                          {plan.badge && (
+                            <div className={clsx(
+                              "absolute -top-2.5 left-4 px-2 py-0.5 text-[9px] font-mono uppercase tracking-wider",
+                              plan.id === 'trader' ? "bg-accent text-black" : "bg-amber-500 text-black"
+                            )}>
+                              {plan.badge}
+                            </div>
+                          )}
+                          
+                          {/* Current Badge */}
+                          {isCurrent && (
+                            <div className="absolute -top-2.5 right-4 px-2 py-0.5 text-[9px] font-mono uppercase tracking-wider bg-white text-black">
+                              Current
+                            </div>
+                          )}
+                          
+                          {/* Header */}
+                          <div className="flex items-center gap-3 mb-4 mt-2">
+                            <div className={clsx(
+                              "w-10 h-10 flex items-center justify-center border",
+                              plan.id === 'tycoon' ? "border-amber-500/30 bg-amber-500/10" :
+                              plan.id === 'trader' ? "border-accent/30 bg-accent/10" :
+                              "border-white/10 bg-white/5"
+                            )}>
+                              <plan.icon className={clsx(
+                                "w-5 h-5",
+                                plan.id === 'tycoon' ? "text-amber-400" :
+                                plan.id === 'trader' ? "text-accent" :
+                                "text-white/60"
+                              )} />
+                            </div>
+                            <div>
+                              <h3 className="text-lg font-display text-white">{plan.name}</h3>
+                              <p className="text-[10px] text-white/40">{plan.description}</p>
+                            </div>
+                          </div>
+                          
+                          {/* Price */}
+                          <div className="flex items-baseline gap-1 mb-5">
+                            {plan.price === 0 ? (
+                              <span className="text-3xl font-mono text-white">Free</span>
+                            ) : (
+                              <>
+                                <span className="text-3xl font-mono text-white">${plan.price}</span>
+                                <span className="text-sm text-white/40">{plan.period}</span>
+                              </>
+                            )}
+                          </div>
+                          
+                          {/* Features */}
+                          <ul className="space-y-2 mb-5">
+                            {plan.features.map((feature, idx) => (
+                              <li key={idx} className="flex items-center gap-2">
+                                <feature.icon className="w-3.5 h-3.5 text-accent shrink-0" />
+                                <span className="text-xs text-white/70">{feature.text}</span>
+                              </li>
+                            ))}
+                          </ul>
+                          
+                          {/* Action Button */}
+                          {isCurrent ? (
+                            <div className="w-full py-3 text-center text-sm font-mono text-accent border border-accent/30 bg-accent/5">
+                              <Check className="w-4 h-4 inline mr-2" />
+                              Active Plan
+                            </div>
+                          ) : isUpgrade ? (
+                            <button
+                              onClick={() => handlePlanChange(plan.id)}
+                              disabled={changingPlan === plan.id}
+                              className="w-full flex items-center justify-center gap-2 py-3 bg-accent text-black text-sm font-semibold hover:bg-white disabled:opacity-50 transition-all"
+                            >
+                              {changingPlan === plan.id ? (
+                                <Loader2 className="w-4 h-4 animate-spin" />
+                              ) : (
+                                <>
+                                  <ArrowUp className="w-4 h-4" />
+                                  Upgrade to {plan.name}
+                                </>
+                              )}
+                            </button>
+                          ) : isDowngrade ? (
+                            <button
+                              onClick={() => handlePlanChange(plan.id)}
+                              disabled={changingPlan === plan.id}
+                              className="w-full flex items-center justify-center gap-2 py-3 text-white/60 text-sm font-medium border border-white/10 hover:border-white/30 hover:text-white disabled:opacity-50 transition-all"
+                            >
+                              {changingPlan === plan.id ? (
+                                <Loader2 className="w-4 h-4 animate-spin" />
+                              ) : (
+                                <>
+                                  <ArrowDown className="w-4 h-4" />
+                                  Downgrade
+                                </>
+                              )}
+                            </button>
+                          ) : null}
+                        </div>
+                      )
+                    })}
+                  </div>
+                </div>
+                
+                {/* Usage Stats */}
+                <div className="border border-white/[0.08] bg-white/[0.01] p-6">
+                  <h2 className="text-sm font-mono text-white/40 tracking-wide mb-4">Current Usage</h2>
+                  
+                  <div className="grid grid-cols-2 lg:grid-cols-4 gap-4">
+                    <div className="p-4 bg-white/[0.02] border border-white/[0.06]">
+                      <div className="flex items-center justify-between mb-2">
+                        <span className="text-[10px] font-mono text-white/40">Watchlist</span>
+                        <Target className="w-3.5 h-3.5 text-accent" />
+                      </div>
+                      <p className="text-xl font-mono text-white">
+                        {subscription?.domains_used || 0}
+                        <span className="text-white/30">/{subscription?.domain_limit || 5}</span>
+                      </p>
+                      <div className="mt-2 h-1 bg-white/10 overflow-hidden">
+                        <div 
+                          className="h-full bg-accent transition-all"
+                          style={{ width: `${Math.min(100, ((subscription?.domains_used || 0) / (subscription?.domain_limit || 5)) * 100)}%` }}
+                        />
+                      </div>
+                    </div>
+                    
+                    <div className="p-4 bg-white/[0.02] border border-white/[0.06]">
+                      <div className="flex items-center justify-between mb-2">
+                        <span className="text-[10px] font-mono text-white/40">Check Speed</span>
+                        <Clock className="w-3.5 h-3.5 text-accent" />
+                      </div>
+                      <p className="text-xl font-mono text-white">
+                        {subscription?.check_frequency === 'realtime' ? '10m' : 
+                         subscription?.check_frequency === 'hourly' ? '1h' : '24h'}
+                      </p>
+                      <p className="text-[10px] text-white/30 mt-1">Interval</p>
+                    </div>
+                    
+                    <div className="p-4 bg-white/[0.02] border border-white/[0.06]">
+                      <div className="flex items-center justify-between mb-2">
+                        <span className="text-[10px] font-mono text-white/40">Portfolio</span>
+                        <Database className="w-3.5 h-3.5 text-accent" />
+                      </div>
+                      <p className="text-xl font-mono text-white">
+                        {subscription?.portfolio_limit === -1 ? '∞' : subscription?.portfolio_limit || 0}
+                      </p>
+                      <p className="text-[10px] text-white/30 mt-1">Slots</p>
+                    </div>
+                    
+                    <div className="p-4 bg-white/[0.02] border border-white/[0.06]">
+                      <div className="flex items-center justify-between mb-2">
+                        <span className="text-[10px] font-mono text-white/40">Status</span>
+                        <Shield className="w-3.5 h-3.5 text-accent" />
+                      </div>
+                      <p className="text-xl font-mono text-accent capitalize">
+                        {subscription?.status || 'active'}
+                      </p>
+                      <p className="text-[10px] text-white/30 mt-1">Subscription</p>
+                    </div>
+                  </div>
+                </div>
+                
+                {/* Help Text */}
+                <div className="text-center py-4">
+                  <p className="text-xs text-white/30">
+                    Need help? <Link href="/contact" className="text-accent hover:underline">Contact support</Link>
+                  </p>
                 </div>
               </div>
             )}