pdf/gateway/app/routers/documents.py

from typing import List
from fastapi import APIRouter, HTTPException, status, File, UploadFile
from pydantic import BaseModel

from app.services import engine
from app.services.store import document_store

router = APIRouter(prefix="/documents", tags=["documents"])

class DocumentInfoResponse(BaseModel):
    id: str
    filename: str
    sizeBytes: int
    totalPages: int
    uploadedAt: str
    status: str

@router.post("", response_model=DocumentInfoResponse, status_code=status.HTTP_201_CREATED)
async def upload_document(file: UploadFile = File(...), password: str = "") -> DocumentInfoResponse:
    if not engine.is_available():
        raise HTTPException(
            status_code=status.HTTP_501_NOT_IMPLEMENTED,
            detail="Engine bridge (bindings/python) not yet available."
        )
    
    bytes_data = await file.read()
    try:
        pdfengine = engine.require()
        doc = pdfengine.PdfDocument.load_from_memory(bytes_data, password)
        info = document_store.add_document(file.filename, bytes_data, doc)
        return DocumentInfoResponse(
            id=info["id"],
            filename=info["filename"],
            sizeBytes=info["sizeBytes"],
            totalPages=info["totalPages"],
            uploadedAt=info["uploadedAt"],
            status=info["status"]
        )
    except ValueError as e:
        detail = str(e)
        if "Password required" in detail:
            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Password required")
        elif "Invalid password" in detail:
            raise HTTPException(status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid password")
        else:
            raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=detail)
    except Exception as e:
        raise HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail=f"Failed to load PDF: {str(e)}")

@router.get("", response_model=List[DocumentInfoResponse])
def list_documents() -> List[DocumentInfoResponse]:
    if not engine.is_available():
        raise HTTPException(
            status_code=status.HTTP_501_NOT_IMPLEMENTED,
            detail="Engine bridge (bindings/python) not yet available."
        )
    
    docs = document_store.list_documents()
    return [
        DocumentInfoResponse(
            id=d["id"],
            filename=d["filename"],
            sizeBytes=d["sizeBytes"],
            totalPages=d["totalPages"],
            uploadedAt=d["uploadedAt"],
            status=d["status"]
        )
        for d in docs
    ]

@router.get("/{document_id}", response_model=DocumentInfoResponse)
def get_document(document_id: str) -> DocumentInfoResponse:
    if not engine.is_available():
        raise HTTPException(
            status_code=status.HTTP_501_NOT_IMPLEMENTED,
            detail="Engine bridge (bindings/python) not yet available."
        )
    
    d = document_store.get_document(document_id)
    if not d:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Document not found")
    
    return DocumentInfoResponse(
        id=d["id"],
        filename=d["filename"],
        sizeBytes=d["sizeBytes"],
        totalPages=d["totalPages"],
        uploadedAt=d["uploadedAt"],
        status=d["status"]
    )

@router.delete("/{document_id}")
def delete_document(document_id: str):
    if not engine.is_available():
        raise HTTPException(
            status_code=status.HTTP_501_NOT_IMPLEMENTED,
            detail="Engine bridge (bindings/python) not yet available."
        )
    
    deleted = document_store.delete_document(document_id)
    if not deleted:
        raise HTTPException(status_code=status.HTTP_404_NOT_FOUND, detail="Document not found")
    
    return {"success": True}