from fastapi import APIRouter, Request
from fastapi.responses import HTMLResponse
import config
import api_client
from pathlib import Path
import shutil
import os
from datetime import datetime

router = APIRouter()


@router.get("/viewer/list", response_class=HTMLResponse)
async def viewer_list(request: Request):
    """Liste les nuages de points disponibles - Endpoint autonome frontend"""
    pointclouds = []
    
    # Récupérer la liste des nuages directement depuis le système de fichiers
    ept_dir = Path(config.EPT_DIR)
    if ept_dir.exists():
        for item in sorted(ept_dir.iterdir(), key=lambda x: x.stat().st_ctime, reverse=True):
            if item.is_dir():
                # Lire le manifeste
                manifest_path = item / "manifest.json"
                manifest = {}
                if manifest_path.exists():
                    try:
                        manifest = {"ept_dir": item.name}
                    except:
                        pass
                
                # Calculer la taille et le nombre de fichiers
                total_size = 0
                file_count = 0
                for f in item.rglob("*"):
                    if f.is_file():
                        total_size += f.stat().st_size
                        file_count += 1
                
                if file_count > 0:
                    pointclouds.append({
                        "id": item.name,
                        "size_mb": round(total_size / (1024 * 1024), 2),
                        "file_count": file_count,
                        "manifest": manifest,
                        "created": item.stat().st_ctime,
                    })
    
    return request.app.state.templates.TemplateResponse(
        "partials/cloud_list.html",
        {"request": request, "pointclouds": pointclouds},
    )


@router.get("/viewer/{pc_id}", response_class=HTMLResponse)
async def viewer(request: Request, pc_id: str):
    embed_url = f"{config.POTREE_URL}/viewer-embed/{pc_id}"
    return request.app.state.templates.TemplateResponse(
        "partials/viewer.html",
        {"request": request, "pc_id": pc_id, "embed_url": embed_url},
    )