Feat: Complete CBT PDF upload, AI parsing, and MinIO storage integration

src/app/admin/layout.tsx

@@ -1,7 +1,7 @@
 "use client"
 
 import { ReactNode } from "react"
-import { LayoutDashboard, Users, Database, Terminal, Settings } from "lucide-react"
+import { LayoutDashboard, Users, Database, Terminal, Settings, FileText } from "lucide-react"
 import Link from "next/link"
 import { usePathname } from "next/navigation"
 import { Logo } from "@/components/Logo"
@@ -19,6 +19,7 @@ export default function AdminLayout({ children }: { children: ReactNode }) {
         </div>
         <nav className="flex-1 px-4 space-y-1.5 mt-6">
           <NavItem href="/admin" icon={<LayoutDashboard size={18} />} label="Command Center" active={pathname === "/admin"} />
+          <NavItem href="/admin/tests" icon={<FileText size={18} />} label="Tests & DPPs" active={pathname.startsWith("/admin/tests")} />
           <NavItem href="/admin/questions" icon={<Database size={18} />} label="Question Bank" active={pathname.startsWith("/admin/questions")} />
           <NavItem href="/admin/agents" icon={<Terminal size={18} />} label="AI Agents" active={pathname.startsWith("/admin/agents")} />
           <NavItem href="/admin/students" icon={<Users size={18} />} label="Students" active={pathname.startsWith("/admin/students")} />

src/app/admin/tests/page.tsx

@@ -0,0 +1,213 @@
+"use client"
+
+import { useState, useEffect, useRef } from "react"
+import { Card, CardContent, CardHeader, CardTitle, CardDescription } from "@/components/ui/card"
+import { Button } from "@/components/ui/button"
+import { Badge } from "@/components/ui/badge"
+import { Switch } from "@/components/ui/switch"
+import { Input } from "@/components/ui/input"
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
+import { Loader2, Upload, FileText, Clock, CalendarIcon } from "lucide-react"
+import { format } from "date-fns"
+
+import { useActiveUser } from "@/hooks/useActiveUser"
+
+export default function AdminTestsPage() {
+  const [tests, setTests] = useState<any[]>([])
+  const [loading, setLoading] = useState(true)
+  const [uploading, setUploading] = useState(false)
+  const { userId } = useActiveUser()
+  const fileInputRef = useRef<HTMLInputElement>(null)
+
+  // Upload Form State
+  const [title, setTitle] = useState("")
+  const [examPattern, setExamPattern] = useState("JEE_Main")
+  const [timeLimit, setTimeLimit] = useState("180")
+  const [scheduledDate, setScheduledDate] = useState("")
+
+  const fetchTests = async () => {
+    try {
+      const res = await fetch("http://localhost:8000/api/admin/tests")
+      if (res.ok) {
+        const data = await res.json()
+        setTests(data)
+      }
+    } catch (e) {
+      console.error(e)
+    } finally {
+      setLoading(false)
+    }
+  }
+
+  useEffect(() => {
+    fetchTests()
+  }, [])
+
+  const handleToggle = async (testId: string) => {
+    try {
+      const res = await fetch(`http://localhost:8000/api/admin/tests/${testId}/toggle`, {
+        method: "PUT"
+      })
+      if (res.ok) {
+        fetchTests()
+      }
+    } catch (e) {
+      console.error(e)
+    }
+  }
+
+  const handleUpload = async (e: React.FormEvent) => {
+    e.preventDefault()
+    if (!fileInputRef.current?.files?.[0]) return
+    if (!userId) return
+
+    setUploading(true)
+    const formData = new FormData()
+    formData.append("file", fileInputRef.current.files[0])
+    formData.append("title", title)
+    formData.append("exam_pattern", examPattern)
+    formData.append("time_limit", timeLimit)
+    formData.append("admin_id", userId)
+    if (scheduledDate) {
+      formData.append("scheduled_date", new Date(scheduledDate).toISOString())
+    }
+
+    try {
+      const res = await fetch("http://localhost:8000/api/admin/tests/upload", {
+        method: "POST",
+        body: formData
+      })
+      
+      if (res.ok) {
+        alert("Test uploaded and sent to AI for processing!")
+        setTitle("")
+        if (fileInputRef.current) fileInputRef.current.value = ""
+        fetchTests()
+      } else {
+        alert("Upload failed")
+      }
+    } catch (error) {
+      console.error(error)
+      alert("Upload failed")
+    } finally {
+      setUploading(false)
+    }
+  }
+
+  return (
+    <div className="space-y-6">
+      <div>
+        <h1 className="text-3xl font-bold tracking-tight">Tests & DPPs</h1>
+        <p className="text-muted-foreground mt-2">Manage CBT examinations and daily practice sheets</p>
+      </div>
+
+      <div className="grid grid-cols-1 lg:grid-cols-3 gap-6">
+        
+        {/* Upload Form */}
+        <Card className="lg:col-span-1 border-muted bg-card shadow-sm">
+          <CardHeader>
+            <CardTitle className="flex items-center gap-2">
+              <Upload className="w-5 h-5 text-primary" />
+              Upload New Test
+            </CardTitle>
+            <CardDescription>Upload a PDF containing questions. AI will automatically extract and format them.</CardDescription>
+          </CardHeader>
+          <CardContent>
+            <form onSubmit={handleUpload} className="space-y-4">
+              <div className="space-y-2">
+                <label className="text-sm font-medium">Test Title</label>
+                <Input required value={title} onChange={e => setTitle(e.target.value)} placeholder="e.g. JEE Main Mock Test 1" />
+              </div>
+              
+              <div className="space-y-2">
+                <label className="text-sm font-medium">Exam Pattern</label>
+                <Select value={examPattern} onValueChange={setExamPattern}>
+                  <SelectTrigger><SelectValue placeholder="Select Exam" /></SelectTrigger>
+                  <SelectContent>
+                    <SelectItem value="JEE_Main">JEE Main</SelectItem>
+                    <SelectItem value="JEE_Advanced">JEE Advanced</SelectItem>
+                    <SelectItem value="NEET">NEET</SelectItem>
+                  </SelectContent>
+                </Select>
+              </div>
+
+              <div className="space-y-2">
+                <label className="text-sm font-medium">Time Limit (mins)</label>
+                <Input required type="number" value={timeLimit} onChange={e => setTimeLimit(e.target.value)} />
+              </div>
+
+              <div className="space-y-2">
+                <label className="text-sm font-medium">Scheduled Date (Optional)</label>
+                <Input type="datetime-local" value={scheduledDate} onChange={e => setScheduledDate(e.target.value)} />
+              </div>
+
+              <div className="space-y-2">
+                <label className="text-sm font-medium">Test PDF File</label>
+                <Input required type="file" accept=".pdf" ref={fileInputRef} className="cursor-pointer" />
+                <p className="text-xs text-muted-foreground mt-1">Make sure it contains clear questions and options.</p>
+              </div>
+
+              <Button type="submit" className="w-full" disabled={uploading}>
+                {uploading ? <Loader2 className="w-4 h-4 mr-2 animate-spin" /> : <Upload className="w-4 h-4 mr-2" />}
+                {uploading ? "Processing PDF via AI..." : "Upload & Parse"}
+              </Button>
+            </form>
+          </CardContent>
+        </Card>
+
+        {/* Existing Tests List */}
+        <Card className="lg:col-span-2 border-muted bg-card shadow-sm">
+          <CardHeader>
+            <CardTitle className="flex items-center gap-2">
+              <FileText className="w-5 h-5 text-primary" />
+              Test Repository
+            </CardTitle>
+            <CardDescription>Manage visibility and schedule for parsed tests.</CardDescription>
+          </CardHeader>
+          <CardContent>
+            {loading ? (
+              <div className="flex justify-center p-8"><Loader2 className="w-8 h-8 animate-spin text-muted-foreground" /></div>
+            ) : tests.length === 0 ? (
+              <div className="text-center p-8 text-muted-foreground border border-dashed rounded-lg">
+                No tests uploaded yet.
+              </div>
+            ) : (
+              <div className="space-y-4">
+                {tests.map(test => (
+                  <div key={test.id} className="flex items-center justify-between p-4 border rounded-lg bg-background">
+                    <div className="space-y-1">
+                      <div className="flex items-center gap-2">
+                        <h3 className="font-semibold">{test.title}</h3>
+                        <Badge variant="outline">{test.exam_pattern.replace("_", " ")}</Badge>
+                        <Badge variant={test.is_active ? "default" : "secondary"}>
+                          {test.is_active ? "Active" : "Inactive / Processing"}
+                        </Badge>
+                      </div>
+                      <div className="flex items-center gap-4 text-sm text-muted-foreground">
+                        <div className="flex items-center gap-1">
+                          <Clock className="w-3 h-3" />
+                          {test.total_time} mins
+                        </div>
+                        {test.scheduled_date && (
+                          <div className="flex items-center gap-1">
+                            <CalendarIcon className="w-3 h-3" />
+                            {format(new Date(test.scheduled_date), "PP p")}
+                          </div>
+                        )}
+                      </div>
+                    </div>
+                    <div className="flex items-center gap-3">
+                      <span className="text-sm font-medium">{test.is_active ? "Published" : "Hidden"}</span>
+                      <Switch checked={test.is_active} onCheckedChange={() => handleToggle(test.id)} />
+                    </div>
+                  </div>
+                ))}
+              </div>
+            )}
+          </CardContent>
+        </Card>
+
+      </div>
+    </div>
+  )
+}

src/app/dashboard/cbt/page.tsx

@@ -15,6 +15,7 @@ interface TestData {
   exam_pattern: string;
   total_time: number;
   difficulty: string;
+  scheduled_date?: string;
 }
 
 export default function CBTPage() {
@@ -116,6 +117,11 @@ export default function CBTPage() {
               const isAttempted = !!attempt;
               const isLocked = !hasAccessTo("weekly-test-series");
               
+              // Date logic
+              const now = new Date();
+              const scheduledTime = exam.scheduled_date ? new Date(exam.scheduled_date) : now;
+              const isUpcoming = scheduledTime > now;
+              
               return (
               <Card key={exam.id} className={`hover:border-[#00F0FF]/50 hover:shadow-[0_0_15px_-5px_#00F0FF] transition-all group ${isAttempted ? 'border-primary/20' : ''} ${isLocked ? 'opacity-80' : ''}`}>
                 <CardContent className="p-6">
@@ -123,7 +129,11 @@ export default function CBTPage() {
                     <Badge variant="outline" className="bg-[#00F0FF]/10 text-[#00F0FF] border-[#00F0FF]/20">
                       {exam.type} Test
                     </Badge>
-                    {isLocked ? (
+                    {isUpcoming ? (
+                      <Badge variant="secondary" className="bg-yellow-500/10 text-yellow-500 border-yellow-500/20">
+                        Upcoming
+                      </Badge>
+                    ) : isLocked ? (
                       <Badge variant="outline" className="bg-red-500/10 text-red-500 border-red-500/20 flex items-center gap-1">
                         <Lock size={12} /> Premium
                       </Badge>
@@ -137,10 +147,17 @@ export default function CBTPage() {
                     {exam.title}
                   </h3>
                   <div className="text-sm text-muted-foreground space-y-1 mb-6">
-                    <div className="font-medium text-foreground">Available Now</div>
+                    <div className="font-medium text-foreground">
+                      {isUpcoming ? `Available on ${formatDate(exam.scheduled_date!)}` : 'Available Now'}
+                    </div>
                     <div>{exam.total_time} Min • {exam.difficulty} Difficulty</div>
                   </div>
-                  {isLocked ? (
+                  
+                  {isUpcoming ? (
+                    <Button disabled className="w-full gap-2 rounded-xl bg-secondary text-muted-foreground font-bold">
+                      <Clock size={16} /> Starts Soon
+                    </Button>
+                  ) : isLocked ? (
                     <Button 
                       onClick={() => setShowUpgradeModal(true)}
                       className="w-full gap-2 rounded-xl bg-secondary text-muted-foreground border border-dashed border-border hover:border-[#00F0FF]/50 hover:text-foreground font-bold"