# routes/upload.py

from fastapi import APIRouter, Request, UploadFile, File, HTTPException
from fastapi.responses import HTMLResponse, RedirectResponse
from pathlib import Path
import api_client
import config

router = APIRouter()


@router.get("/", response_class=RedirectResponse)
async def root():
    """Redirige / vers /upload"""
    return RedirectResponse(url="/upload")


@router.get("/upload", response_class=HTMLResponse)
async def index(request: Request):
    """
    ✅ CORRECTION BUG 2 : si la requête vient de HTMX (header HX-Request),
    on retourne uniquement le partial upload_form.html (sans navbar, sans layout).
    Si c'est une navigation directe dans le navigateur, on retourne index.html complet.
    """
    is_htmx = request.headers.get("HX-Request") == "true"
    if is_htmx:
        return request.app.state.templates.TemplateResponse(
            "partials/upload_form.html",
            {"request": request},
        )
    return request.app.state.templates.TemplateResponse(
        "index.html",
        {"request": request, "active_tab": "upload"},
    )


@router.get("/health-check", response_class=HTMLResponse)
async def health_check(request: Request):
    try:
        data = await api_client.check_health()
        return request.app.state.templates.TemplateResponse(
            "partials/health_status.html",
            {"request": request, "ok": True, "entwine_available": data.get("entwine_available", False), "disk_free_gb": data.get("disk_free_gb", "?")},
        )
    except Exception as e:
        return request.app.state.templates.TemplateResponse(
            "partials/health_status.html",
            {"request": request, "ok": False, "error": str(e)},
        )


@router.post("/upload", response_class=HTMLResponse)
async def upload(request: Request, file: UploadFile = File(...)):
    suffix = Path(file.filename).suffix.lower()
    if suffix not in config.SUPPORTED_EXTENSIONS:
        return request.app.state.templates.TemplateResponse(
            "partials/upload_result.html",
            {"request": request, "error": f"Format non supporté : {suffix}. Formats acceptés : {', '.join(config.SUPPORTED_EXTENSIONS)}", "result": None},
        )
    try:
        data = await api_client.upload_file(file.filename, await file.read())
        return request.app.state.templates.TemplateResponse(
            "partials/upload_result.html",
            {"request": request, "result": data, "error": None},
        )
    except Exception as e:
        return request.app.state.templates.TemplateResponse(
            "partials/upload_result.html",
            {"request": request, "error": str(e), "result": None},
        )