import streamlit as st
import ast
import base64
import streamlit.components.v1 as components
from transformers import pipeline
from gtts import gTTS
import qrcode
from io import BytesIO

st.set_page_config(page_title="AR/VR Code Visualizer", layout="wide")
st.title("👓 AR/VR Code Visualizer with Interaction, Narration, and AR View")

@st.cache_resource
def load_model():
    return pipeline("summarization", model="philschmid/bart-large-cnn-samsum")

summarizer = load_model()

st.subheader("📝 Write or Paste Your Python Code")
code = st.text_area("Enter your Python code here", height=300)

if code.strip():
    st.code(code, language="python")

    # AST parsing to get function call relationships
    tree = ast.parse(code)

    class FunctionCallVisitor(ast.NodeVisitor):
        def __init__(self):
            self.calls = {}

        def visit_FunctionDef(self, node):
            caller = node.name
            self.calls[caller] = []
            for child in ast.walk(node):
                if isinstance(child, ast.Call) and isinstance(child.func, ast.Name):
                    self.calls[caller].append(child.func.id)
            self.generic_visit(node)

    visitor = FunctionCallVisitor()
    visitor.visit(tree)
    call_graph = visitor.calls

    st.subheader("📊 Function Calls")
    for fn, callees in call_graph.items():
        st.write(f"🔹 `{fn}` calls: {', '.join(callees) if callees else 'None'}")

    # AI summary
    prompt = f"Explain this call graph structure: {call_graph}"
    summary = summarizer(prompt, max_length=60, min_length=15, do_sample=False)
    summary_text = summary[0]['summary_text']
    st.success(summary_text)

    # Voice narration
    st.subheader("🔊 Voice Narration")
    tts = gTTS(text=summary_text)
    tts.save("summary.mp3")
    st.audio("summary.mp3", format="audio/mp3")

    # A-Frame 3D HTML generator
    def generate_aframe(call_graph):
        function_data = {
            "functions": [],
            "relationships": []
        }

        function_positions = {}
        spacing = 3
        for i, fn in enumerate(call_graph):
            x = i * spacing
            function_positions[fn] = (x, 1, -3)
            function_data["functions"].append({"name": fn, "position": [x, 1, -3]})

        for caller, callees in call_graph.items():
            for callee in callees:
                if callee in function_positions:
                    x1, y1, z1 = function_positions[caller]
                    x2, y2, z2 = function_positions[callee]
                    function_data["relationships"].append({"start": [x1, y1, z1], "end": [x2, y2, z2]})

        js = f"""
        <script>
        const functionData = {str(function_data).replace("'", '"')};

        function say(text) {{
            const utter = new SpeechSynthesisUtterance(text);
            speechSynthesis.speak(utter);
        }}

        document.addEventListener('DOMContentLoaded', () => {{
            functionData.functions.forEach(function(fn) {{
                const box = document.createElement('a-box');
                box.setAttribute('position', fn.position.join(' '));
                box.setAttribute('depth', '0.5');
                box.setAttribute('height', '0.5');
                box.setAttribute('width', '2');
                box.setAttribute('color', '#FFC65D');
                box.setAttribute('class', 'clickable');
                box.setAttribute('event-set__enter', '_event: mouseenter; color: #00CED1');
                box.setAttribute('event-set__leave', '_event: mouseleave; color: #FFC65D');
                box.setAttribute('onclick', 'say(\"' + fn.name + '\")');
                document.querySelector('a-scene').appendChild(box);

                const text = document.createElement('a-text');
                text.setAttribute('value', fn.name);
                text.setAttribute('position', `${{fn.position[0]}} ${{fn.position[1] + 1}} ${{fn.position[2]}}`);
                text.setAttribute('align', 'center');
                text.setAttribute('color', '#000');
                document.querySelector('a-scene').appendChild(text);
            }});

            functionData.relationships.forEach(function(rel) {{
                const el = document.createElement('a-entity');
                el.setAttribute('line', `start: ${{rel.start.join(' ')}}; end: ${{rel.end.join(' ')}}; color: red`);
                document.querySelector('a-scene').appendChild(el);
            }});
        }});
        </script>
        """

        html = f"""
        <!DOCTYPE html>
        <html>
        <head>
            <meta charset="utf-8">
            <script src="https://aframe.io/releases/1.3.0/aframe.min.js"></script>
            <script src="https://cdn.jsdelivr.net/gh/donmccurdy/aframe-extras@6.1.1/dist/aframe-extras.min.js"></script>
            <script src="https://unpkg.com/aframe-screenshot-component@3.3.0/dist/aframe-screenshot-component.min.js"></script>
            {js}
        </head>
        <body>
            <a-scene screenshot>
                <a-entity position="0 1.6 3">
                    <a-camera wasd-controls-enabled="true" look-controls-enabled="true"></a-camera>
                </a-entity>
                <a-light type="ambient" color="#FFF"></a-light>
                <a-plane rotation="-90 0 0" width="40" height="40" color="#7BC8A4"></a-plane>
            </a-scene>
        </body>
        </html>
        """
        return html

    aframe_html = generate_aframe(call_graph)
    b64 = base64.b64encode(aframe_html.encode()).decode()
    data_url = f"data:text/html;base64,{b64}"

    st.subheader("🌐 Interactive 3D Function Visualizer")
    components.iframe(data_url, height=600)

    # QR Code
    st.subheader("📱 AR View on Mobile")
    qr = qrcode.QRCode(version=1, box_size=10, border=5)
    space_url = "https://huggingface.co/spaces/your-username/your-space-name"  # Replace this
    qr.add_data(space_url)
    qr.make(fit=True)

    img = qr.make_image(fill_color="black", back_color="white")
    img_byte_arr = BytesIO()
    img.save(img_byte_arr, format='PNG')
    img_bytes = img_byte_arr.getvalue()
    st.image(img_bytes, caption="Scan to view in AR on mobile")

else:
    st.info("Write some Python code above to visualize, narrate, and explore it in 3D/AR.")