// Example: Asking about course schedules
const query = "What is the schedule for CSE 301 classes this semester?";
const response = await bupBuddy.ask(query);
// Response: "CSE 301 classes are held on Sunday and Tuesday from 2:00 PM to 3:30 PM in Room 405..."

// client/src/services/aiService.js
import { GoogleGenerativeAI } from '@google/generative-ai';

class AIService {
    constructor() {
        this.genAI = new GoogleGenerativeAI(import.meta.env.VITE_GEMINI_API_KEY);
        this.model = this.genAI.getGenerativeModel({ 
            model: "gemini-pro",
            safetySettings: [
                {
                    category: "HARM_CATEGORY_HARASSMENT",
                    threshold: "BLOCK_MEDIUM_AND_ABOVE"
                }
            ],
            generationConfig: {
                temperature: 0.7,
                topK: 40,
                topP: 0.95,
                maxOutputTokens: 1024,
            }
        });
        
        this.conversationHistory = new Map();
    }

    async getResponse(userId, message, context = {}) {
        try {
            // Get conversation history
            const history = this.conversationHistory.get(userId) || [];
            
            // Prepare prompt with context
            const prompt = this.formatPrompt(message, context, history);
            
            // Get AI response
            const result = await this.model.generateContent(prompt);
            const response = await result.response;
            const text = response.text();
            
            // Update conversation history
            history.push({ role: 'user', content: message });
            history.push({ role: 'assistant', content: text });
            
            // Keep last 10 messages
            if (history.length > 20) {
                history.splice(0, 4);
            }
            
            this.conversationHistory.set(userId, history);
            
            return {
                success: true,
                message: text,
                timestamp: new Date().toISOString(),
                sources: this.extractSources(text)
            };
        } catch (error) {
            console.error('AI Service Error:', error);
            return {
                success: false,
                message: "I apologize, but I'm having trouble processing your request. Please try again.",
                error: error.message
            };
        }
    }

    formatPrompt(userMessage, context, history) {
        const systemPrompt = `You are BUPBuddy, an AI assistant for Bangladesh University of Professionals.
        Context: ${JSON.stringify(context)}
        Current Date: ${new Date().toDateString()}
        
        Guidelines:
        1. Provide accurate information about BUP
        2. If unsure, say so and suggest contacting relevant department
        3. Be concise but thorough
        4. Support both English and বাংলা
        5. Maintain helpful, professional tone
        
        Previous conversation: ${JSON.stringify(history.slice(-4))}
        
        User: ${userMessage}`;
        
        return systemPrompt;
    }
}

export default new AIService();

// client/src/contexts/ThemeContext.jsx
import React, { createContext, useState, useEffect } from 'react';

export const ThemeContext = createContext();

export const ThemeProvider = ({ children }) => {
    const [theme, setTheme] = useState(() => {
        const savedTheme = localStorage.getItem('bupbuddy-theme');
        return savedTheme || (window.matchMedia('(prefers-color-scheme: dark)').matches ? 'dark' : 'light');
    });

    useEffect(() => {
        localStorage.setItem('bupbuddy-theme', theme);
        
        if (theme === 'dark') {
            document.documentElement.classList.add('dark');
            document.documentElement.style.setProperty('--primary-color', '#4e89ae');
            document.documentElement.style.setProperty('--background-color', '#1a1a1a');
            document.documentElement.style.setProperty('--text-color', '#ffffff');
        } else {
            document.documentElement.classList.remove('dark');
            document.documentElement.style.setProperty('--primary-color', '#4e89ae');
            document.documentElement.style.setProperty('--background-color', '#ffffff');
            document.documentElement.style.setProperty('--text-color', '#333333');
        }
    }, [theme]);

    const toggleTheme = () => {
        setTheme(prev => prev === 'light' ? 'dark' : 'light');
    };

    return (
        <ThemeContext.Provider value={{ theme, toggleTheme }}>
            {children}
        </ThemeContext.Provider>
    );
};