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

router = APIRouter()


@router.get("/viewer/list", response_class=HTMLResponse)
async def viewer_list(request: Request):
    """
    Liste les nuages de points — retourne uniquement le contenu intérieur
    (cloud_list_body.html) pour injection dans #cloud-list-body.
    La card enveloppe et le bouton Actualiser vivent dans index.html, pas ici.
    """
    pointclouds = []

    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():
                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": {},
                        "created": item.stat().st_ctime,
                    })

    return request.app.state.templates.TemplateResponse(
        "partials/cloud_list_body.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},
    )