import streamlit as st
import os
import base64
from pathlib import Path
import shutil

def load_aframe_and_extras():
    return """
    <script src="https://aframe.io/releases/1.2.0/aframe.min.js"></script>
    <script src="https://unpkg.com/aframe-event-set-component@5.0.0/dist/aframe-event-set-component.min.js"></script>
    <script>
    AFRAME.registerComponent('draggable', {
      init: function () {
        this.el.setAttribute('class', 'raycastable');
        this.el.setAttribute('cursor-listener', '');
        this.dragHandler = this.dragMove.bind(this);
        this.el.sceneEl.addEventListener('mousemove', this.dragHandler);
        this.el.addEventListener('mousedown', this.onDragStart.bind(this));
        this.el.addEventListener('mouseup', this.onDragEnd.bind(this));
        this.camera = document.querySelector('[camera]');
      },
      remove: function () {
        this.el.removeAttribute('cursor-listener');
        this.el.sceneEl.removeEventListener('mousemove', this.dragHandler);
      },
      onDragStart: function (evt) {
        this.isDragging = true;
        this.el.emit('dragstart');
      },
      onDragEnd: function (evt) {
        this.isDragging = false;
        this.el.emit('dragend');
      },
      dragMove: function (evt) {
        if (!this.isDragging) return;
        var camera = this.camera;
        var vector = new THREE.Vector3(evt.clientX / window.innerWidth * 2 - 1, -(evt.clientY / window.innerHeight) * 2 + 1, 0.5);
        vector.unproject(camera);
        var dir = vector.sub(camera.position).normalize();
        var distance = -camera.position.y / dir.y;
        var pos = camera.position.clone().add(dir.multiplyScalar(distance));
        this.el.setAttribute('position', pos);
      }
    });
    </script>
    """

def create_aframe_entity(file_path, file_type, position):
    if file_type == 'obj':
        return f'<a-entity position="{position}" obj-model="obj: #{Path(file_path).stem}" class="raycastable" draggable></a-entity>'
    elif file_type == 'glb':
        return f'<a-entity position="{position}" gltf-model="#{Path(file_path).stem}" class="raycastable" draggable></a-entity>'
    elif file_type in ['webp', 'png']:
        return f'<a-image position="{position}" src="#{Path(file_path).stem}" width="1" height="1" class="raycastable" draggable></a-image>'
    elif file_type == 'mp4':
        return f'<a-video position="{position}" src="#{Path(file_path).stem}" width="1" height="1" class="raycastable" draggable></a-video>'
    return ''

def encode_file(file_path):
    with open(file_path, "rb") as file:
        return base64.b64encode(file.read()).decode()

def main():
    st.set_page_config(layout="wide")
    
    with st.sidebar:
        st.title("3D File Viewer 🌐")
        
        st.markdown("### 🎨 Create Assets")
        st.markdown("[Open 3D Animation Toolkit](https://huggingface.co/spaces/awacke1/3d_animation_toolkit)", unsafe_allow_html=True)
        
        st.markdown("### 📁 Directory")
        directory = st.text_input("Enter path:", ".", key="directory_input")
        
        st.markdown("### ⬆️ Upload")
        uploaded_files = st.file_uploader("Add files:", accept_multiple_files=True, key="file_uploader")
        
        st.markdown("### ℹ️ Instructions")
        st.write("- Click and drag to move objects")
        st.write("- Use mouse wheel to zoom")
        st.write("- Right-click and drag to rotate")

    if not os.path.isdir(directory):
        st.sidebar.error("Invalid directory path")
        return

    file_types = ['obj', 'glb', 'webp', 'png', 'mp4']
    
    if uploaded_files:
        for uploaded_file in uploaded_files:
            file_extension = Path(uploaded_file.name).suffix.lower()[1:]
            if file_extension in file_types:
                with open(os.path.join(directory, uploaded_file.name), "wb") as f:
                    shutil.copyfileobj(uploaded_file, f)
                st.sidebar.success(f"Uploaded: {uploaded_file.name}")
            else:
                st.sidebar.warning(f"Skipped unsupported file: {uploaded_file.name}")

    files = [f for f in os.listdir(directory) if f.split('.')[-1] in file_types]

    aframe_scene = """
    <a-scene embedded style="height: 600px; width: 100%;">
      <a-entity camera="userHeight: 1.6" position="0 2 2" rotation="-45 0 0" cursor="rayOrigin: mouse" raycaster="objects: .raycastable"></a-entity>
    """

    assets = "<a-assets>"
    entities = ""

    for i, file in enumerate(files):
        file_path = os.path.join(directory, file)
        file_type = file.split('.')[-1]
        encoded_file = encode_file(file_path)
        
        if file_type in ['obj', 'glb']:
            assets += f'<a-asset-item id="{Path(file).stem}" src="data:application/octet-stream;base64,{encoded_file}"></a-asset-item>'
        elif file_type in ['webp', 'png', 'mp4']:
            mime_type = f"image/{file_type}" if file_type in ['webp', 'png'] else "video/mp4"
            assets += f'<{file_type} id="{Path(file).stem}" src="data:{mime_type};base64,{encoded_file}"></{file_type}>'

        position = f"{i} 0 {i}"
        entities += create_aframe_entity(file_path, file_type, position)

    assets += "</a-assets>"
    aframe_scene += assets + entities + "</a-scene>"

    st.components.v1.html(load_aframe_and_extras() + aframe_scene, height=600)

if __name__ == "__main__":
    main()