import gradio as gr
from groq import Groq
import os
from PIL import Image, ImageDraw, ImageFont
from datetime import datetime
import json
import tempfile

# Initialize Groq client
client = Groq(
    api_key=os.getenv("GROQ_API_KEY")
)

class QuizApp:
    def __init__(self):
        self.current_questions = []
    
    def generate_questions(self, text, num_questions):
        prompt = 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
            }}
        ]
        """
        
        try:
            response = 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
            )
            
            response_text = response.choices[0].message.content.strip()
            response_text = response_text.replace("```json", "").replace("```", "").strip()
            response_text = response_text[response_text.find("["):response_text.rfind("]")+1]
            
            questions = json.loads(response_text)
            validated_questions = []
            
            for q in questions:
                if not all(key in q for key in ["question", "options", "correct_answer"]):
                    continue
                
                clean_options = [opt.strip()[:100] for opt in q["options"] if isinstance(opt, str)]
                if len(clean_options) != 4:
                    continue
                
                clean_q = {
                    "question": q["question"].strip(),
                    "options": clean_options,
                    "correct_answer": int(q["correct_answer"]) % 4
                }
                validated_questions.append(clean_q)
            
            self.current_questions = validated_questions[:num_questions]
            return True, self.current_questions
            
        except Exception as e:
            print(f"Error in question generation: {str(e)}")
            return False, []

    def calculate_score(self, answers):
        if not answers or not self.current_questions:
            return 0, []
        
        total = len(self.current_questions)
        correct = 0
        results = []  # Store whether each answer was correct
        
        for i, (q, a) in enumerate(zip(self.current_questions, answers)):
            try:
                if a is not None:
                    selected_index = q["options"].index(a)
                    is_correct = selected_index == q["correct_answer"]
                    if is_correct:
                        correct += 1
                    results.append({
                        "question_index": i,
                        "selected_index": selected_index,
                        "correct_index": q["correct_answer"],
                        "is_correct": is_correct
                    })
                else:
                    results.append({
                        "question_index": i,
                        "selected_index": None,
                        "correct_index": q["correct_answer"],
                        "is_correct": False
                    })
            except (ValueError, TypeError) as e:
                print(f"Error processing answer {i}: {e}")
                results.append({
                    "question_index": i,
                    "selected_index": None,
                    "correct_index": q["correct_answer"],
                    "is_correct": False
                })
        
        return (correct / total) * 100, results

def create_quiz_interface():
    quiz_app = QuizApp()
    
    with gr.Blocks(title="CertifyMe AI", theme=gr.themes.Soft()) as demo:
        current_questions = gr.State([])
        
        # Header
        gr.Markdown("""
        # 🎓 CertifyMe AI
        ### Transform Your Knowledge into Recognized Achievements
        """)
        
        # Tabs
        with gr.Tabs() as tabs:
            # Step 1: Profile Setup (remains largely the same)
            with gr.Tab("📋 Step 1: Profile Setup") as tab1:
                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")
            
            # Step 2: Take Assessment
            with gr.Tab("📝 Step 2: Take Assessment") as tab2:
                assessment_status = gr.Markdown("")
                with gr.Group() as question_group:
                    questions = []
                    for i in range(5):
                        with gr.Group(visible=False) as qgroup:
                            question_md = gr.Markdown("", elem_id=f"question_{i}")
                            radio = gr.Radio(
                                choices=[],
                                label="Select your answer:",
                                interactive=True,
                                elem_id=f"answer_{i}"
                            )
                            result_md = gr.Markdown("", elem_id=f"result_{i}")
                            questions.append({"group": qgroup, "md": question_md, "radio": radio, "result": result_md})
                
                submit_btn = gr.Button("Submit Assessment", variant="primary", size="lg")
                result_modal = gr.Markdown("")
            
            # Step 3: Get Certified
            with gr.Tab("🎓 Step 3: Get Certified") as tab3:
                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")

        def update_questions(text, num_questions):
            if not text.strip():
                return [
                    gr.update(visible=False) for _ in range(5)
                ], "⚠️ Please enter some text content to generate questions.", [], 0
            
            success, generated_questions = quiz_app.generate_questions(text, num_questions)
            
            if not success or not generated_questions:
                return [
                    gr.update(visible=False) for _ in range(5)
                ], "❌ Failed to generate questions. Please try again.", [], 0
            
            updates = []
            for i in range(5):
                if i < len(generated_questions):
                    q = generated_questions[i]
                    updates.append(gr.update(
                        visible=True,
                        value={
                            "md": f"### Question {i+1}\n{q['question']}",
                            "radio": gr.update(choices=q["options"], value=None),
                            "result": ""
                        }
                    ))
                else:
                    updates.append(gr.update(visible=False))
            
            return updates, "", generated_questions, 1

        def submit_quiz(answers, questions):
            if not all(a is not None for a in answers[:len(questions)]):
                return (
                    gr.update(value="⚠️ Please answer all questions before submitting."),
                    score_display.value,
                    0
                )
            
            score, results = quiz_app.calculate_score(answers)
            
            # Update result display for each question
            updates = []
            for i, result in enumerate(results):
                if result["is_correct"]:
                    status = "✅ Correct!"
                    color = "green"
                else:
                    status = f"❌ Incorrect. Correct answer: {questions[i]['options'][result['correct_index']]}"
                    color = "red"
                
                updates.append(gr.update(
                    visible=True,
                    value=f'<div style="color: {color};">{status}</div>'
                ))
            
            # Add result message
            if score >= 80:
                message = f"""
                ## 🎉 Congratulations!
                You passed the assessment with a score of {score:.1f}%
                Your certificate has been generated.
                """
            else:
                message = f"""
                ## Try Again
                Your score: {score:.1f}%
                You need 80% or higher to pass and receive a certificate.
                """
            
            return updates, message, score, 2

        # Event handlers
        generate_btn.click(
            fn=update_questions,
            inputs=[text_input, num_questions],
            outputs=[
                *[q["group"] for q in questions],
                assessment_status,
                current_questions,
                gr.State(1)
            ]
        ).then(
            fn=lambda x: gr.update(selected=x),
            inputs=[gr.State(1)],
            outputs=tabs
        )
        
        submit_btn.click(
            fn=submit_quiz,
            inputs=[
                *[q["radio"] for q in questions],
                current_questions
            ],
            outputs=[
                *[q["result"] for q in questions],
                result_modal,
                score_display,
                gr.State(2)
            ]
        ).then(
            fn=lambda x: gr.update(selected=x),
            inputs=[gr.State(2)],
            outputs=tabs
        )
        
        def generate_certificate(score, name, course_name, company_logo=None, participant_photo=None):
            """
            Generate a certificate with custom styling and optional logo/photo
            
            Args:
                score (float): Assessment score (0-100)
                name (str): Participant's name
                course_name (str): Name of the course/assessment
                company_logo (str, optional): Path to company logo image
                participant_photo (str, optional): Path to participant's photo
            
            Returns:
                str: Path to generated certificate image file
            """
            try:
                # Create certificate with a light blue background
                certificate = Image.new('RGB', (1200, 800), '#F0F8FF')
                draw = ImageDraw.Draw(certificate)
                
                # Try to load fonts, fallback to default if necessary
                try:
                    title_font = ImageFont.truetype("arial.ttf", 60)
                    text_font = ImageFont.truetype("arial.ttf", 40)
                    subtitle_font = ImageFont.truetype("arial.ttf", 30)
                except Exception as e:
                    print(f"Font loading error: {e}. Using default font.")
                    title_font = ImageFont.load_default()
                    text_font = ImageFont.load_default()
                    subtitle_font = ImageFont.load_default()
                
                # Add decorative border
                border_color = '#4682B4'  # Steel blue
                draw.rectangle([20, 20, 1180, 780], outline=border_color, width=3)
                
                # Add inner border
                draw.rectangle([40, 40, 1160, 760], outline=border_color, width=1)
                
                # Add certificate content
                # Title
                draw.text(
                    (600, 100),
                    "CertifyMe AI",
                    font=title_font,
                    fill='#4682B4',
                    anchor="mm"
                )
                
                # Subtitle
                draw.text(
                    (600, 160),
                    "Certificate of Achievement",
                    font=subtitle_font,
                    fill='#4682B4',
                    anchor="mm"
                )
                
                # Main content
                draw.text(
                    (600, 300),
                    "This is to certify that",
                    font=text_font,
                    fill='black',
                    anchor="mm"
                )
                
                # Participant name
                name = name.strip() if name else "Participant"
                draw.text(
                    (600, 380),
                    name,
                    font=text_font,
                    fill='#4682B4',
                    anchor="mm"
                )
                
                # Completion text
                draw.text(
                    (600, 460),
                    "has successfully completed",
                    font=text_font,
                    fill='black',
                    anchor="mm"
                )
                
                # Course name
                course_name = course_name.strip() if course_name else "Assessment"
                draw.text(
                    (600, 540),
                    course_name,
                    font=text_font,
                    fill='#4682B4',
                    anchor="mm"
                )
                
                # Score
                draw.text(
                    (600, 620),
                    f"with a score of {score:.1f}%",
                    font=text_font,
                    fill='black',
                    anchor="mm"
                )
                
                # Date
                current_date = datetime.now().strftime("%B %d, %Y")
                draw.text(
                    (600, 700),
                    current_date,
                    font=text_font,
                    fill='black',
                    anchor="mm"
                )
                
                # Add logo if provided
                if company_logo is not None:
                    try:
                        logo = Image.open(company_logo)
                        # Maintain aspect ratio
                        logo.thumbnail((150, 150))
                        # Calculate position to place logo
                        logo_x = 50
                        logo_y = 50
                        certificate.paste(logo, (logo_x, logo_y))
                    except Exception as e:
                        print(f"Error adding logo: {e}")
                
                # Add photo if provided
                if participant_photo is not None:
                    try:
                        photo = Image.open(participant_photo)
                        # Maintain aspect ratio
                        photo.thumbnail((150, 150))
                        # Calculate position to place photo
                        photo_x = 1000
                        photo_y = 50
                        certificate.paste(photo, (photo_x, photo_y))
                    except Exception as e:
                        print(f"Error adding photo: {e}")
                
                # Add decorative corners
                corner_size = 20
                corner_color = '#4682B4'
                
                # Top-left corner
                draw.line([(20, 40), (20 + corner_size, 40)], fill=corner_color, width=2)
                draw.line([(40, 20), (40, 20 + corner_size)], fill=corner_color, width=2)
                
                # Top-right corner
                draw.line([(1180 - corner_size, 40), (1180, 40)], fill=corner_color, width=2)
                draw.line([(1160, 20), (1160, 20 + corner_size)], fill=corner_color, width=2)
                
                # Bottom-left corner
                draw.line([(20, 760), (20 + corner_size, 760)], fill=corner_color, width=2)
                draw.line([(40, 780 - corner_size), (40, 780)], fill=corner_color, width=2)
                
                # Bottom-right corner
                draw.line([(1180 - corner_size, 760), (1180, 760)], fill=corner_color, width=2)
                draw.line([(1160, 780 - corner_size), (1160, 780)], fill=corner_color, width=2)
                
                # Save certificate
                temp_file = tempfile.NamedTemporaryFile(delete=False, suffix='.png')
                certificate.save(temp_file.name, 'PNG', quality=95)
                return temp_file.name
                
            except Exception as e:
                print(f"Error generating certificate: {e}")
                return None
    
        
        score_display.change(
            fn=generate_certificate,
            inputs=[score_display, name, course_name, company_logo, participant_photo],
            outputs=certificate_display
        )
    
    return demo

if __name__ == "__main__":
    if not os.getenv("GROQ_API_KEY"):
        print("Please set your GROQ_API_KEY environment variable")
        exit(1)
    
    demo = create_quiz_interface()
    demo.launch()