from fastapi import FastAPI, HTTPException, Query
from fastapi.responses import FileResponse
from pathlib import Path
from typing import List
import os

app = FastAPI()
FILES_ROOT = Path("/var/www/lasereverything.net.db/files").resolve()

@app.get("/list-files")
def list_files(
    path: str = "",
    offset: int = 0,
    limit: int = 50
):
    base_path = (FILES_ROOT / path).resolve()

    if not base_path.is_dir() or not str(base_path).startswith(str(FILES_ROOT)):
        raise HTTPException(status_code=400, detail="Invalid path")

    entries = []
    for item in base_path.iterdir():
        if item.is_dir():
            entries.append(f"{item.name}/")
        else:
            entries.append(item.name)

    entries.sort()
    paginated = entries[offset:offset + limit]

    return {
        "total": len(entries),
        "items": paginated
    }

@app.get("/download/{file_path:path}")
def download_file(file_path: str):
    full_path = (FILES_ROOT / file_path).resolve()

    if not full_path.is_file() or not str(full_path).startswith(str(FILES_ROOT)):
        raise HTTPException(status_code=404, detail="File not found")

    return FileResponse(full_path, filename=full_path.name)