1st page implemented

app/page.tsx

@@ -3,6 +3,10 @@
 import { useState } from "react"
 import { UploadSection } from "@/components/upload-section"
 import VideoPlayerSection from "@/components/video-player-section"
+import { ProjectSelectionSection } from "@/components/project-selection-section"
+import { type SessionContext, emptySessionContext } from "@/lib/api"
+import { Button } from "@/components/ui/button"
+import { ArrowLeft, MapPin, Package, FolderKanban } from "lucide-react"
 
 export type DetectionType = "pothole-detection" | "sign-board-detection"
 
@@ -67,11 +71,14 @@ export type DetectionData = {
 }
 
 export default function DetectionPage() {
+  const [session, setSession] = useState<SessionContext>(emptySessionContext)
   const [detectionData, setDetectionData] = useState<DetectionData | null>(null)
   const [videoId, setVideoId] = useState<string | null>(null)
   const [videoFile, setVideoFile] = useState<File | null>(null)
   const [detectionType, setDetectionType] = useState<DetectionType>("pothole-detection")
 
+  const isSessionComplete = session.projectId && session.packageId && session.locationId
+
   const getTitle = () => {
     return detectionType === "pothole-detection"
       ? "Pothole Detection System"
@@ -84,28 +91,79 @@ export default function DetectionPage() {
       : "Upload a video to detect and identify signboards with AI-powered analysis"
   }
 
+  const handleSelectionComplete = (newSession: SessionContext) => {
+    setSession(newSession)
+  }
+
+  const handleBackToSelection = () => {
+    setSession(emptySessionContext)
+    setDetectionData(null)
+    setVideoId(null)
+    setVideoFile(null)
+  }
+
   return (
     <div className="min-h-screen bg-gradient-to-b from-background to-muted/20">
       <div className="container mx-auto px-4 py-8 max-w-7xl">
         {/* Header */}
         <div className="mb-8 animate-in fade-in slide-in-from-top duration-700">
           <h1 className="text-4xl font-bold mb-2 text-balance bg-gradient-to-r from-foreground to-foreground/70 bg-clip-text text-transparent">
-            {getTitle()}
+            {isSessionComplete ? getTitle() : "VisionRoad Detection System"}
           </h1>
-          <p className="text-muted-foreground">{getDescription()}</p>
+          <p className="text-muted-foreground">
+            {isSessionComplete ? getDescription() : "Select your project location to begin AI-powered road analysis"}
+          </p>
         </div>
 
-        {/* Upload Section */}
-        <div className="animate-in fade-in slide-in-from-bottom duration-700 delay-100">
-          <UploadSection
-            onDetectionComplete={(data, vId, file) => {
-              setDetectionData(data)
-              setVideoId(vId)
-              setVideoFile(file)
-            }}
-            onDetectionTypeChange={setDetectionType}
-          />
-        </div>
+        {/* Session Info Bar */}
+        {isSessionComplete && (
+          <div className="mb-6 animate-in fade-in slide-in-from-top duration-500">
+            <div className="flex items-center justify-between p-4 rounded-lg bg-gradient-to-r from-primary/10 via-primary/5 to-transparent border border-primary/20">
+              <div className="flex items-center gap-6 text-sm">
+                <div className="flex items-center gap-2">
+                  <FolderKanban className="h-4 w-4 text-primary" />
+                  <span className="text-muted-foreground">Project:</span>
+                  <span className="font-medium">{session.projectName}</span>
+                </div>
+                <div className="flex items-center gap-2">
+                  <Package className="h-4 w-4 text-primary" />
+                  <span className="text-muted-foreground">Package:</span>
+                  <span className="font-medium">{session.packageName}</span>
+                </div>
+                <div className="flex items-center gap-2">
+                  <MapPin className="h-4 w-4 text-primary" />
+                  <span className="text-muted-foreground">Location:</span>
+                  <span className="font-medium">{session.locationName}</span>
+                </div>
+              </div>
+              <Button variant="ghost" size="sm" onClick={handleBackToSelection}>
+                <ArrowLeft className="h-4 w-4 mr-2" />
+                Change Selection
+              </Button>
+            </div>
+          </div>
+        )}
+
+        {/* Project Selection Section - Show when session is not complete */}
+        {!isSessionComplete && (
+          <div className="animate-in fade-in slide-in-from-bottom duration-700 delay-100">
+            <ProjectSelectionSection onSelectionComplete={handleSelectionComplete} />
+          </div>
+        )}
+
+        {/* Upload Section - Show after session is complete */}
+        {isSessionComplete && (
+          <div className="animate-in fade-in slide-in-from-bottom duration-700 delay-100">
+            <UploadSection
+              onDetectionComplete={(data, vId, file) => {
+                setDetectionData(data)
+                setVideoId(vId)
+                setVideoFile(file)
+              }}
+              onDetectionTypeChange={setDetectionType}
+            />
+          </div>
+        )}
 
         {/* Video Player Section */}
         {detectionData && videoId && videoFile && (

components/project-selection-section.tsx

@@ -0,0 +1,312 @@
+"use client"
+
+import { useState, useEffect } from "react"
+import { Card, CardContent, CardDescription, CardHeader, CardTitle } from "@/components/ui/card"
+import { Button } from "@/components/ui/button"
+import { Label } from "@/components/ui/label"
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "@/components/ui/select"
+import { Loader2, MapPin, Package, FolderKanban, ArrowRight, AlertCircle } from "lucide-react"
+import {
+    fetchProjects,
+    fetchPackagesByProject,
+    fetchLocationsByPackage,
+    type Project,
+    type Package as PackageType,
+    type Location,
+    type SessionContext
+} from "@/lib/api"
+
+type ProjectSelectionSectionProps = {
+    onSelectionComplete: (session: SessionContext) => void
+}
+
+export function ProjectSelectionSection({ onSelectionComplete }: ProjectSelectionSectionProps) {
+    // Data states
+    const [projects, setProjects] = useState<Project[]>([])
+    const [packages, setPackages] = useState<PackageType[]>([])
+    const [locations, setLocations] = useState<Location[]>([])
+
+    // Selection states
+    const [selectedProject, setSelectedProject] = useState<Project | null>(null)
+    const [selectedPackage, setSelectedPackage] = useState<PackageType | null>(null)
+    const [selectedLocation, setSelectedLocation] = useState<Location | null>(null)
+
+    // Loading states
+    const [loadingProjects, setLoadingProjects] = useState(true)
+    const [loadingPackages, setLoadingPackages] = useState(false)
+    const [loadingLocations, setLoadingLocations] = useState(false)
+
+    // Error state
+    const [error, setError] = useState<string | null>(null)
+
+    // Load projects on mount
+    useEffect(() => {
+        const loadProjects = async () => {
+            try {
+                setLoadingProjects(true)
+                setError(null)
+                const data = await fetchProjects()
+                setProjects(data)
+            } catch (err) {
+                console.error("Failed to load projects:", err)
+                setError("Failed to load projects. Please check if the backend is running.")
+            } finally {
+                setLoadingProjects(false)
+            }
+        }
+        loadProjects()
+    }, [])
+
+    // Load packages when project changes
+    useEffect(() => {
+        if (!selectedProject) {
+            setPackages([])
+            setSelectedPackage(null)
+            return
+        }
+
+        const loadPackages = async () => {
+            try {
+                setLoadingPackages(true)
+                setError(null)
+                setSelectedPackage(null)
+                setSelectedLocation(null)
+                setLocations([])
+                const data = await fetchPackagesByProject(selectedProject.id)
+                setPackages(data)
+            } catch (err) {
+                console.error("Failed to load packages:", err)
+                setError("Failed to load packages for the selected project.")
+            } finally {
+                setLoadingPackages(false)
+            }
+        }
+        loadPackages()
+    }, [selectedProject])
+
+    // Load locations when package changes
+    useEffect(() => {
+        if (!selectedPackage) {
+            setLocations([])
+            setSelectedLocation(null)
+            return
+        }
+
+        const loadLocations = async () => {
+            try {
+                setLoadingLocations(true)
+                setError(null)
+                setSelectedLocation(null)
+                const data = await fetchLocationsByPackage(selectedPackage.id)
+                setLocations(data)
+            } catch (err) {
+                console.error("Failed to load locations:", err)
+                setError("Failed to load locations for the selected package.")
+            } finally {
+                setLoadingLocations(false)
+            }
+        }
+        loadLocations()
+    }, [selectedPackage])
+
+    const handleProjectChange = (projectId: string) => {
+        const project = projects.find(p => p.id === projectId) || null
+        setSelectedProject(project)
+    }
+
+    const handlePackageChange = (packageId: string) => {
+        const pkg = packages.find(p => p.id === packageId) || null
+        setSelectedPackage(pkg)
+    }
+
+    const handleLocationChange = (locationId: string) => {
+        const location = locations.find(l => l.id === locationId) || null
+        setSelectedLocation(location)
+    }
+
+    const handleProceed = () => {
+        if (selectedProject && selectedPackage && selectedLocation) {
+            onSelectionComplete({
+                projectId: selectedProject.id,
+                projectName: selectedProject.name,
+                packageId: selectedPackage.id,
+                packageName: selectedPackage.name,
+                locationId: selectedLocation.id,
+                locationName: selectedLocation.segment_name
+            })
+        }
+    }
+
+    const isComplete = selectedProject && selectedPackage && selectedLocation
+
+    return (
+        <Card className="transition-all hover:shadow-lg border-0 bg-gradient-to-br from-card via-card to-muted/30">
+            <CardHeader className="pb-4">
+                <div className="flex items-center gap-3">
+                    <div className="p-2 rounded-lg bg-gradient-to-br from-primary/20 to-primary/5">
+                        <FolderKanban className="h-6 w-6 text-primary" />
+                    </div>
+                    <div>
+                        <CardTitle className="text-xl">Select Project Location</CardTitle>
+                        <CardDescription className="mt-1">
+                            Choose your project, package, and location to begin video analysis
+                        </CardDescription>
+                    </div>
+                </div>
+            </CardHeader>
+            <CardContent className="space-y-6">
+                {/* Error Display */}
+                {error && (
+                    <div className="flex items-start gap-2 p-3 rounded-lg bg-destructive/10 text-destructive animate-in fade-in slide-in-from-top duration-300">
+                        <AlertCircle className="h-5 w-5 mt-0.5 flex-shrink-0" />
+                        <p className="text-sm">{error}</p>
+                    </div>
+                )}
+
+                <div className="grid grid-cols-1 md:grid-cols-3 gap-6">
+                    {/* Project Dropdown */}
+                    <div className="space-y-2">
+                        <Label htmlFor="project" className="flex items-center gap-2 text-sm font-medium">
+                            <FolderKanban className="h-4 w-4 text-muted-foreground" />
+                            Project
+                        </Label>
+                        <Select
+                            value={selectedProject?.id || ""}
+                            onValueChange={handleProjectChange}
+                            disabled={loadingProjects}
+                        >
+                            <SelectTrigger id="project" className="h-11">
+                                {loadingProjects ? (
+                                    <div className="flex items-center gap-2">
+                                        <Loader2 className="h-4 w-4 animate-spin" />
+                                        <span>Loading...</span>
+                                    </div>
+                                ) : (
+                                    <SelectValue placeholder="Select a project" />
+                                )}
+                            </SelectTrigger>
+                            <SelectContent>
+                                {projects.map((project) => (
+                                    <SelectItem key={project.id} value={project.id}>
+                                        <div className="flex flex-col">
+                                            <span className="font-medium">{project.name}</span>
+                                            {project.corridor_name && (
+                                                <span className="text-xs text-muted-foreground">{project.corridor_name}</span>
+                                            )}
+                                        </div>
+                                    </SelectItem>
+                                ))}
+                            </SelectContent>
+                        </Select>
+                        {selectedProject?.state && (
+                            <p className="text-xs text-muted-foreground">
+                                State: {selectedProject.state}
+                            </p>
+                        )}
+                    </div>
+
+                    {/* Package Dropdown */}
+                    <div className="space-y-2">
+                        <Label htmlFor="package" className="flex items-center gap-2 text-sm font-medium">
+                            <Package className="h-4 w-4 text-muted-foreground" />
+                            Package
+                        </Label>
+                        <Select
+                            value={selectedPackage?.id || ""}
+                            onValueChange={handlePackageChange}
+                            disabled={!selectedProject || loadingPackages}
+                        >
+                            <SelectTrigger id="package" className="h-11">
+                                {loadingPackages ? (
+                                    <div className="flex items-center gap-2">
+                                        <Loader2 className="h-4 w-4 animate-spin" />
+                                        <span>Loading...</span>
+                                    </div>
+                                ) : (
+                                    <SelectValue placeholder={selectedProject ? "Select a package" : "Select project first"} />
+                                )}
+                            </SelectTrigger>
+                            <SelectContent>
+                                {packages.map((pkg) => (
+                                    <SelectItem key={pkg.id} value={pkg.id}>
+                                        <div className="flex flex-col">
+                                            <span className="font-medium">{pkg.name}</span>
+                                            {pkg.region && (
+                                                <span className="text-xs text-muted-foreground">{pkg.region}</span>
+                                            )}
+                                        </div>
+                                    </SelectItem>
+                                ))}
+                            </SelectContent>
+                        </Select>
+                    </div>
+
+                    {/* Location Dropdown */}
+                    <div className="space-y-2">
+                        <Label htmlFor="location" className="flex items-center gap-2 text-sm font-medium">
+                            <MapPin className="h-4 w-4 text-muted-foreground" />
+                            Location
+                        </Label>
+                        <Select
+                            value={selectedLocation?.id || ""}
+                            onValueChange={handleLocationChange}
+                            disabled={!selectedPackage || loadingLocations}
+                        >
+                            <SelectTrigger id="location" className="h-11">
+                                {loadingLocations ? (
+                                    <div className="flex items-center gap-2">
+                                        <Loader2 className="h-4 w-4 animate-spin" />
+                                        <span>Loading...</span>
+                                    </div>
+                                ) : (
+                                    <SelectValue placeholder={selectedPackage ? "Select a location" : "Select package first"} />
+                                )}
+                            </SelectTrigger>
+                            <SelectContent>
+                                {locations.map((location) => (
+                                    <SelectItem key={location.id} value={location.id}>
+                                        <div className="flex flex-col">
+                                            <span className="font-medium">{location.segment_name}</span>
+                                            {location.chainage_start_km !== null && location.chainage_end_km !== null && (
+                                                <span className="text-xs text-muted-foreground">
+                                                    KM {location.chainage_start_km} - {location.chainage_end_km}
+                                                </span>
+                                            )}
+                                        </div>
+                                    </SelectItem>
+                                ))}
+                            </SelectContent>
+                        </Select>
+                    </div>
+                </div>
+
+                {/* Selected Summary */}
+                {isComplete && (
+                    <div className="p-4 rounded-lg bg-primary/5 border border-primary/20 animate-in fade-in slide-in-from-bottom duration-300">
+                        <p className="text-sm text-muted-foreground mb-1">Selected:</p>
+                        <p className="font-medium">
+                            {selectedProject?.name} → {selectedPackage?.name} → {selectedLocation?.segment_name}
+                        </p>
+                    </div>
+                )}
+
+                {/* Proceed Button */}
+                <Button
+                    onClick={handleProceed}
+                    disabled={!isComplete}
+                    className="w-full h-12 text-base font-semibold transition-all"
+                    size="lg"
+                >
+                    {isComplete ? (
+                        <>
+                            Proceed to Upload
+                            <ArrowRight className="ml-2 h-5 w-5" />
+                        </>
+                    ) : (
+                        "Complete all selections to proceed"
+                    )}
+                </Button>
+            </CardContent>
+        </Card>
+    )
+}

lib/api.ts

@@ -0,0 +1,103 @@
+/**
+ * API Service Layer for VisionRoad Frontend
+ * Provides typed functions for interacting with the backend API
+ */
+
+const API_URL = process.env.NEXT_PUBLIC_API_URL || "http://127.0.0.1:8000/api/v1"
+
+// Type definitions
+export interface Project {
+    id: string
+    name: string
+    state: string | null
+    corridor_name: string | null
+    start_lat: number | null
+    start_lng: number | null
+    end_lat: number | null
+    end_lng: number | null
+    created_at: string
+    updated_at: string
+}
+
+export interface Package {
+    id: string
+    project_id: string
+    name: string
+    region: string | null
+    created_at: string
+    updated_at: string
+}
+
+export interface Location {
+    id: string
+    package_id: string
+    segment_name: string
+    chainage_start_km: number | null
+    chainage_end_km: number | null
+    start_lat: number
+    start_lng: number
+    end_lat: number
+    end_lng: number
+    created_at: string
+    updated_at: string
+}
+
+// Helper function for API requests
+async function apiRequest<T>(endpoint: string): Promise<T> {
+    const response = await fetch(`${API_URL}${endpoint}`, {
+        headers: {
+            "Content-Type": "application/json",
+            "ngrok-skip-browser-warning": "true"
+        }
+    })
+
+    if (!response.ok) {
+        throw new Error(`API Error: ${response.status} ${response.statusText}`)
+    }
+
+    return response.json()
+}
+
+// API Functions
+
+/**
+ * Fetch all projects
+ */
+export async function fetchProjects(): Promise<Project[]> {
+    return apiRequest<Project[]>("/projects/")
+}
+
+/**
+ * Fetch packages filtered by project ID
+ */
+export async function fetchPackagesByProject(projectId: string): Promise<Package[]> {
+    return apiRequest<Package[]>(`/packages/?project_id=${projectId}`)
+}
+
+/**
+ * Fetch locations filtered by package ID
+ */
+export async function fetchLocationsByPackage(packageId: string): Promise<Location[]> {
+    return apiRequest<Location[]>(`/locations/?package_id=${packageId}`)
+}
+
+/**
+ * Session context type for storing user selections
+ */
+export interface SessionContext {
+    projectId: string | null
+    projectName: string | null
+    packageId: string | null
+    packageName: string | null
+    locationId: string | null
+    locationName: string | null
+}
+
+export const emptySessionContext: SessionContext = {
+    projectId: null,
+    projectName: null,
+    packageId: null,
+    packageName: null,
+    locationId: null,
+    locationName: null
+}

package-lock.json

@@ -2480,6 +2480,7 @@
       "integrity": "sha512-MWtvHrGZLFttgeEj28VXHxpmwYbor/ATPYbBfSFZEIRK0ecCFLl2Qo55z52Hss+UV9CRN7trSeq1zbgx7YDWWg==",
       "devOptional": true,
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "csstype": "^3.2.2"
       }
@@ -2490,6 +2491,7 @@
       "integrity": "sha512-jp2L/eY6fn+KgVVQAOqYItbF0VY/YApe5Mz2F0aykSO8gx31bYCZyvSeYxCHKvzHG5eZjc+zyaS5BrBWya2+kQ==",
       "devOptional": true,
       "license": "MIT",
+      "peer": true,
       "peerDependencies": {
         "@types/react": "^19.2.0"
       }
@@ -2591,6 +2593,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "baseline-browser-mapping": "^2.9.0",
         "caniuse-lite": "^1.0.30001759",
@@ -2853,7 +2856,8 @@
       "version": "8.5.1",
       "resolved": "https://registry.npmjs.org/embla-carousel/-/embla-carousel-8.5.1.tgz",
       "integrity": "sha512-JUb5+FOHobSiWQ2EJNaueCNT/cQU9L6XWBbWmorWPQT9bkbk+fhsuLr8wWrzXKagO3oWszBO7MSx+GfaRk4E6A==",
-      "license": "MIT"
+      "license": "MIT",
+      "peer": true
     },
     "node_modules/embla-carousel-react": {
       "version": "8.5.1",
@@ -3300,6 +3304,7 @@
       "resolved": "https://registry.npmjs.org/next/-/next-16.0.10.tgz",
       "integrity": "sha512-RtWh5PUgI+vxlV3HdR+IfWA1UUHu0+Ram/JBO4vWB54cVPentCD0e+lxyAYEsDTqGGMg7qpjhKh6dc6aW7W/sA==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "@next/env": "16.0.10",
         "@swc/helpers": "0.5.15",
@@ -3425,6 +3430,7 @@
         }
       ],
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "nanoid": "^3.3.11",
         "picocolors": "^1.1.1",
@@ -3462,6 +3468,7 @@
       "resolved": "https://registry.npmjs.org/react/-/react-19.2.0.tgz",
       "integrity": "sha512-tmbWg6W31tQLeB5cdIBOicJDJRR2KzXsV7uSK9iNfLWQ5bIZfxuPEHp7M8wiHyHnn0DD1i7w3Zmin0FtkrwoCQ==",
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=0.10.0"
       }
@@ -3492,6 +3499,7 @@
       "resolved": "https://registry.npmjs.org/react-dom/-/react-dom-19.2.0.tgz",
       "integrity": "sha512-UlbRu4cAiGaIewkPyiRGJk0imDN2T3JjieT6spoL2UeSf5od4n5LB/mQ4ejmxhCFT1tYe8IvaFulzynWovsEFQ==",
       "license": "MIT",
+      "peer": true,
       "dependencies": {
         "scheduler": "^0.27.0"
       },
@@ -3504,6 +3512,7 @@
       "resolved": "https://registry.npmjs.org/react-hook-form/-/react-hook-form-7.68.0.tgz",
       "integrity": "sha512-oNN3fjrZ/Xo40SWlHf1yCjlMK417JxoSJVUXQjGdvdRCU07NTFei1i1f8ApUAts+IVh14e4EdakeLEA+BEAs/Q==",
       "license": "MIT",
+      "peer": true,
       "engines": {
         "node": ">=18.0.0"
       },
@@ -3789,7 +3798,8 @@
       "version": "4.1.18",
       "resolved": "https://registry.npmjs.org/tailwindcss/-/tailwindcss-4.1.18.tgz",
       "integrity": "sha512-4+Z+0yiYyEtUVCScyfHCxOYP06L5Ne+JiHhY2IjR2KWMIWhJOYZKLSGZaP5HkZ8+bY0cxfzwDE5uOmzFXyIwxw==",
-      "license": "MIT"
+      "license": "MIT",
+      "peer": true
     },
     "node_modules/tailwindcss-animate": {
       "version": "1.0.7",