import logging

from fastapi import APIRouter, File, Form, UploadFile
from fastapi.responses import JSONResponse

from app.services import database, minio

router = APIRouter(tags=["upload"])
logger = logging.getLogger(__name__)

MAX_FILE_SIZE = 10 * 1024 * 1024  # 10 MB


@router.post("/transactions/upload")
async def upload_transaction(
    file: UploadFile = File(...),
    original_filename: str | None = Form(None),
    user_note: str | None = Form(None),
):
    # Read file content
    content = await file.read()

    if len(content) == 0:
        return JSONResponse(
            status_code=422,
            content={"success": False, "error": "Missing required field: file"},
        )

    if len(content) > MAX_FILE_SIZE:
        return JSONResponse(
            status_code=413,
            content={"success": False, "error": "File size exceeds 10MB limit"},
        )

    filename = original_filename or file.filename or "upload.jpg"

    # Upload to MinIO
    try:
        object_key = minio.upload_image(content, filename)
    except Exception:
        logger.exception("Failed to upload image to storage")
        return JSONResponse(
            status_code=503,
            content={"success": False, "error": "Storage service unavailable"},
        )

    # Insert metadata into PostgreSQL
    try:
        result = database.insert_transaction(
            image_object_key=object_key,
            original_filename=filename,
            user_note=user_note if user_note else None,
        )
    except Exception:
        logger.exception("Failed to save transaction metadata")
        return JSONResponse(
            status_code=500,
            content={"success": False, "error": "Failed to save transaction metadata"},
        )

    return {"success": True, "data": result}