from fastapi import FastAPI, UploadFile, File, HTTPException
from fastapi.responses import FileResponse, JSONResponse
from fastapi.middleware.cors import CORSMiddleware
import os
import uuid

app = FastAPI()

# Configure CORS
app.add_middleware(
    CORSMiddleware,
    allow_origins=["*"],  # Allows all origins
    allow_credentials=True,
    allow_methods=["*"],  # Allows all methods
    allow_headers=["*"],  # Allows all headers
)

UPLOAD_DIRECTORY = "./uploads"

os.makedirs(UPLOAD_DIRECTORY, exist_ok=True)

@app.post("/upload")
async def upload_mp4(file: UploadFile = File(...)):
    if not file.filename.endswith(".mp4"):
        raise HTTPException(status_code=400, detail="Invalid file type. Only MP4 files are allowed.")

    file_id = str(uuid.uuid4()) + ".mp4"
    file_path = os.path.join(UPLOAD_DIRECTORY, file_id)

    try:
        with open(file_path, "wb") as buffer:
            while True:
                chunk = await file.read(1024 * 1024)  # Read in 1MB chunks
                if not chunk:
                    break
                buffer.write(chunk)
        return JSONResponse(content={"id": file_id, "message": "File uploaded successfully"}, status_code=200)
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to upload file: {str(e)}")

@app.get("/download/{mp4_id}")
async def download_mp4(mp4_id: str):
    file_path = os.path.join(UPLOAD_DIRECTORY, mp4_id)
    if not os.path.exists(file_path):
        raise HTTPException(status_code=404, detail="File not found")
    return FileResponse(file_path, media_type="video/mp4", filename=mp4_id)

@app.delete("/delete/{mp4_id}")
async def delete_mp4(mp4_id: str):
    file_path = os.path.join(UPLOAD_DIRECTORY, mp4_id)
    if not os.path.exists(file_path):
        raise HTTPException(status_code=404, detail="File not found")
    try:
        os.remove(file_path)
        return JSONResponse(content={"message": f"File {mp4_id} deleted successfully"}, status_code=200)
    except Exception as e:
        raise HTTPException(status_code=500, detail=f"Failed to delete file: {str(e)}")