app.py

import gradio as gr
from groq import Groq
import os
from PIL import Image, ImageDraw, ImageFont
from datetime import datetime
import json
import tempfile
from typing import List, Dict, Tuple, Optional
from dataclasses import dataclass

@dataclass
class Question:
    question: str
    options: List[str]
    correct_answer: int

@dataclass
class QuizFeedback:
    is_correct: bool
    selected: Optional[str]
    correct_answer: str

class QuizGenerator:
    def __init__(self, api_key: str):
        self.client = Groq(api_key=api_key)
    
    def generate_questions(self, text: str, num_questions: int) -> List[Question]:
        prompt = self._create_prompt(text, num_questions)
        
        try:
            response = self.client.chat.completions.create(
                messages=[
                    {
                        "role": "system",
                        "content": "You are a quiz generator. Create clear questions with concise answer options."
                    },
                    {
                        "role": "user",
                        "content": prompt
                    }
                ],
                model="llama-3.2-3b-preview",
                temperature=0.3,
                max_tokens=2048
            )
            
            questions = self._parse_response(response.choices[0].message.content)
            return self._validate_questions(questions, num_questions)
            
        except Exception as e:
            raise QuizGenerationError(f"Failed to generate questions: {str(e)}")
    
    def _create_prompt(self, text: str, num_questions: int) -> str:
        return f"""Create exactly {num_questions} multiple choice questions based on this text:
        {text}
        
        For each question:
        1. Create a clear, concise question
        2. Provide exactly 4 options
        3. Mark the correct answer with the index (0-3)
        4. Ensure options are concise and clear
        
        Return ONLY a JSON array with this EXACT format - no other text:
        [
            {{
                "question": "Question text here?",
                "options": [
                    "Brief option 1",
                    "Brief option 2",
                    "Brief option 3",
                    "Brief option 4"
                ],
                "correct_answer": 0
            }}
        ]
        Keep all options concise (10 words or less each).
        """
    
    def _parse_response(self, response_text: str) -> List[Dict]:
        response_text = response_text.replace("```json", "").replace("```", "").strip()
        start_idx = response_text.find("[")
        end_idx = response_text.rfind("]")
        
        if start_idx == -1 or end_idx == -1:
            raise ValueError("No valid JSON array found in response")
            
        response_text = response_text[start_idx:end_idx + 1]
        return json.loads(response_text)
    
    def _validate_questions(self, questions: List[Dict], num_questions: int) -> List[Question]:
        validated = []
        for q in questions:
            if not self._is_valid_question(q):
                continue
            validated.append(Question(
                question=q["question"].strip(),
                options=[opt.strip()[:100] for opt in q["options"]],
                correct_answer=int(q["correct_answer"]) % 4
            ))
        
        if not validated:
            raise ValueError("No valid questions after validation")
            
        return validated[:num_questions]
    
    def _is_valid_question(self, question: Dict) -> bool:
        return (
            all(key in question for key in ["question", "options", "correct_answer"]) and
            isinstance(question["options"], list) and
            len(question["options"]) == 4 and
            all(isinstance(opt, str) for opt in question["options"])
        )

class CertificateGenerator:
    def __init__(self):
        self.certificate_size = (1200, 800)
        self.border_color = '#4682B4'
        self.background_color = '#F0F8FF'
        
    def generate(
        self,
        name: str,
        score: float,
        course_name: str,
        company_logo: Optional[str] = None,
        participant_photo: Optional[str] = None
    ) -> str:
        certificate = self._create_base_certificate()
        draw = ImageDraw.Draw(certificate)
        
        fonts = self._load_fonts()
        self._add_borders(draw)
        self._add_content(draw, fonts, name, score, course_name)
        self._add_images(certificate, company_logo, participant_photo)
        
        return self._save_certificate(certificate)
    
    def _create_base_certificate(self) -> Image.Image:
        return Image.new('RGB', self.certificate_size, self.background_color)
    
    def _load_fonts(self) -> Dict[str, ImageFont.FreeTypeFont]:
        try:
            return {
                'title': ImageFont.truetype("arial.ttf", 60),
                'text': ImageFont.truetype("arial.ttf", 40),
                'subtitle': ImageFont.truetype("arial.ttf", 30)
            }
        except Exception as e:
            print(f"Font loading error: {e}. Using default font.")
            default = ImageFont.load_default()
            return {'title': default, 'text': default, 'subtitle': default}
    
    def _add_borders(self, draw: ImageDraw.Draw):
        # Main borders
        draw.rectangle([20, 20, 1180, 780], outline=self.border_color, width=3)
        draw.rectangle([40, 40, 1160, 760], outline=self.border_color, width=1)
        
        # Decorative corners
        self._add_decorative_corners(draw)
    
    def _add_decorative_corners(self, draw: ImageDraw.Draw):
        corner_size = 20
        corners = [
            # Top-left
            [(20, 40), (20 + corner_size, 40)],
            [(40, 20), (40, 20 + corner_size)],
            # Top-right
            [(1180 - corner_size, 40), (1180, 40)],
            [(1160, 20), (1160, 20 + corner_size)],
            # Bottom-left
            [(20, 760), (20 + corner_size, 760)],
            [(40, 780 - corner_size), (40, 780)],
            # Bottom-right
            [(1180 - corner_size, 760), (1180, 760)],
            [(1160, 780 - corner_size), (1160, 780)]
        ]
        
        for corner in corners:
            draw.line(corner, fill=self.border_color, width=2)
    
    def _add_content(
        self,
        draw: ImageDraw.Draw,
        fonts: Dict[str, ImageFont.FreeTypeFont],
        name: str,
        score: float,
        course_name: str
    ):
        # Title and headers
        draw.text((600, 100), "CertifyMe AI", font=fonts['title'], fill=self.border_color, anchor="mm")
        draw.text((600, 160), "Certificate of Achievement", font=fonts['subtitle'], fill=self.border_color, anchor="mm")
        
        # Main content
        content = [
            (300, "This is to certify that", 'black'),
            (380, name.strip() or "Participant", self.border_color),
            (460, "has successfully completed", 'black'),
            (540, course_name.strip() or "Assessment", self.border_color),
            (620, f"with a score of {score:.1f}%", 'black'),
            (700, datetime.now().strftime("%B %d, %Y"), 'black')
        ]
        
        for y, text, color in content:
            draw.text((600, y), text, font=fonts['text'], fill=color, anchor="mm")
    
    def _add_images(
        self,
        certificate: Image.Image,
        company_logo: Optional[str],
        participant_photo: Optional[str]
    ):
        if company_logo:
            self._add_image(certificate, company_logo, (50, 50))
        if participant_photo:
            self._add_image(certificate, participant_photo, (1000, 50))
    
    def _add_image(self, certificate: Image.Image, image_path: str, position: Tuple[int, int]):
        try:
            img = Image.open(image_path)
            img.thumbnail((150, 150))
            certificate.paste(img, position)
        except Exception as e:
            print(f"Error adding image: {e}")
    
    def _save_certificate(self, certificate: Image.Image) -> str:
        temp_file = tempfile.NamedTemporaryFile(delete=False, suffix='.png')
        certificate.save(temp_file.name, 'PNG', quality=95)
        return temp_file.name

class QuizApp:
    def __init__(self, api_key: str):
        self.quiz_generator = QuizGenerator(api_key)
        self.certificate_generator = CertificateGenerator()
        self.current_questions: List[Question] = []
    
    def generate_questions(self, text: str, num_questions: int) -> Tuple[bool, List[Question]]:
        try:
            self.current_questions = self.quiz_generator.generate_questions(text, num_questions)
            return True, self.current_questions
        except Exception as e:
            print(f"Error generating questions: {e}")
            return False, []
    
    def calculate_score(self, answers: List[Optional[str]]) -> Tuple[float, bool, List[QuizFeedback]]:
        if not answers or not self.current_questions:
            return 0, False, []
        
        feedback = []
        correct = 0
        
        for question, answer in zip(self.current_questions, answers):
            if answer is None:
                feedback.append(QuizFeedback(False, None, question.options[question.correct_answer]))
                continue
                
            try:
                selected_index = question.options.index(answer)
                is_correct = selected_index == question.correct_answer
                if is_correct:
                    correct += 1
                feedback.append(QuizFeedback(
                    is_correct,
                    answer,
                    question.options[question.correct_answer]
                ))
            except ValueError:
                feedback.append(QuizFeedback(False, answer, question.options[question.correct_answer]))
        
        score = (correct / len(self.current_questions)) * 100
        return score, score >= 80, feedback

def create_quiz_interface():
    if not os.getenv("GROQ_API_KEY"):
        raise EnvironmentError("Please set your GROQ_API_KEY environment variable")
        
    quiz_app = QuizApp(os.getenv("GROQ_API_KEY"))
    
    with gr.Blocks(title="CertifyMe AI", theme=gr.themes.Soft()) as demo:
        # State management
        current_questions = gr.State([])
        
        # UI Components layout
        gr.Markdown("""
        # 🎓 CertifyMe AI
        ### Transform Your Knowledge into Recognized Achievements
        """)
        
        with gr.Tabs() as tabs:
            # Profile Setup Tab
            with gr.Tab("📋 Step 1: Profile Setup"):
                with gr.Row():
                    name = gr.Textbox(label="Full Name", placeholder="Enter your full name")
                    email = gr.Textbox(label="Email", placeholder="Enter your email")
                
                text_input = gr.Textbox(
                    label="Learning Content",
                    placeholder="Enter the text content you want to be assessed on",
                    lines=10
                )
                
                num_questions = gr.Slider(
                    minimum=1,
                    maximum=5,
                    value=3,
                    step=1,
                    label="Number of Questions"
                )
                
                with gr.Row():
                    company_logo = gr.Image(label="Company Logo (Optional)", type="filepath")
                    participant_photo = gr.Image(label="Your Photo (Optional)", type="filepath")
                
                generate_btn = gr.Button("Generate Assessment", variant="primary", size="lg")
            
            # Assessment Tab
            with gr.Tab("📝 Step 2: Take Assessment"):
                feedback_box = gr.Markdown("")
                question_box = gr.Markdown("")
                answers = [
                    gr.Radio(choices=[], label=f"Question {i+1}", visible=False)
                    for i in range(5)
                ]
                submit_btn = gr.Button("Submit Assessment", variant="primary", size="lg")
            
            # Certification Tab
            with gr.Tab("🎓 Step 3: Get Certified"):
                score_display = gr.Number(label="Your Score")
                result_message = gr.Markdown("")
                course_name = gr.Textbox(
                    label="Certification Title",
                    value="Professional Assessment Certification"
                )
                certificate_display = gr.Image(label="Your Certificate")
        
        # Event handlers
        generate_btn.click(
            fn=quiz_app.update_questions,
            inputs=[text_input, num_questions],
            outputs=[
                question_box,
                feedback_box,
                *answers,
                current_questions,
                tabs
            ]
        )
        
        submit_btn.click(
            fn=quiz_app.submit_quiz,
            inputs=[*answers, current_questions],
            outputs=[
                feedback_box,
                *answers,
                score_display,
                result_message,
                tabs
            ]
        )
        
        score_display.change(
            fn=quiz_app.certificate_generator.generate,
            inputs=[score_display, name, course_name, company_logo, participant_photo],
            outputs=certificate_display
        )
    
    return demo

if __name__ == "__main__":
    demo = create_quiz_interface()
    demo.launch()