🤖 ChatAI

A lightning-fast, cost-effective AI chat platform with multiple models and intelligent conversation management.

Database Model

🚀 Key Features

• Multiple AI Models: Choose from GPT-4o, Deepseek Chat, Qwen Coder, Google Gemini, and more
• Smart Conversations: Persistent chat history with intelligent conversation management
• Lightning Fast: Optimized for speed with real-time streaming responses
• Beautiful Interface: Clean, modern design built with React and TypeScript
• Secure Authentication: OTP-based login system for enhanced security

🛠️ Tech Stack

Frontend

• React 18 with TypeScript
• Tailwind CSS for styling
• Vite for blazing-fast development

Backend

• Node.js with Express
• TypeScript for type safety
• Prisma ORM with PostgreSQL
• JWT Authentication
• OpenRouter API for AI model access

🎯 Core Functionality

Intelligent Chat Management

• Create and manage multiple conversations
• Automatic conversation titling based on first message
• Delete conversations with proper data cleanup
• Seamless conversation switching

Multi-Model Support

• GPT-4o: OpenAI's flagship model
• Deepseek Chat: Advanced reasoning capabilities
• Qwen Coder: Specialized for coding tasks
• Google Gemini 2.0: Latest Google AI technology
• GPT-OSS: Cost-effective alternative

📦 Getting Started

Prerequisites

• Node.js 18+
• PostgreSQL database
• OpenRouter API key

Installation

1. Clone the repository

   git clone https://github.com/sdass1918/ChatAI-Project.git
   cd ChatAI-Project

2. Setup Backend

   cd Backend
   npm install
   # Configure your environment variables
   npx prisma migrate dev
   npm run dev

3. Setup Frontend

   cd frontend
   npm install
   # Configure your environment variables
   npm run dev

4. Environment Variables

   # Backend (.env)
   DATABASE_URL="your_postgresql_url"
   JWT_SECRET="your_jwt_secret"
   OPENROUTER_API_KEY="your_openrouter_key"
   
   # Frontend (.env)
   VITE_BACKEND_URL="http://localhost:3000"

🎨 Screenshots

🔧 API Endpoints

Authentication

• POST /auth/initiate_signin - Start OTP login process
• POST /auth/signin - Complete login with OTP

Conversations

• GET /ai/conversations - List all conversations
• POST /ai/conversations - Create new conversation
• GET /ai/conversations/:id - Get conversation with messages
• DELETE /ai/conversations/:id - Delete conversation

Chat

• POST /ai/chat - Send message and get AI response (streaming)

📱 Usage

1. Sign In: Enter your email to receive an OTP
2. Verify: Enter the OTP to access your dashboard
3. New Chat: Click "New Chat" to start a conversation
4. Choose Model: Select from available AI models
5. Chat: Send messages and receive real-time AI responses
6. Manage: Switch between conversations or delete old ones