from fastapi import APIRouter, Depends, File, Form, HTTPException, UploadFile
from pydantic import BaseModel

from app.dependencies import get_document_service
from app.document_service import (
    DocumentNotFoundError,
    DocumentService,
    FileTooLargeError,
    UnsupportedFileTypeError,
)

router = APIRouter()


class SaveDocumentRequest(BaseModel):
    content: str
    contentType: str


@router.get("/api/documents")
def list_documents(path: str = "", service: DocumentService = Depends(get_document_service)):
    return service.list_documents(path)


@router.get("/api/documents/{key:path}")
def get_document(key: str, service: DocumentService = Depends(get_document_service)):
    try:
        return service.get_document(key)
    except DocumentNotFoundError:
        raise HTTPException(status_code=404, detail="Document not found")


@router.put("/api/documents/{key:path}")
def save_document(
    key: str, body: SaveDocumentRequest, service: DocumentService = Depends(get_document_service)
):
    return service.save_document(key, body.content.encode("utf-8"), body.contentType)


@router.delete("/api/documents/{key:path}", status_code=204)
def delete_document(key: str, service: DocumentService = Depends(get_document_service)):
    service.delete_document(key)
    return None


@router.post("/api/upload", status_code=201)
async def upload_document(
    file: UploadFile = File(...),
    path: str = Form(...),
    service: DocumentService = Depends(get_document_service),
):
    data = await file.read()
    key = f"{path.rstrip('/')}/{file.filename}" if path else file.filename
    content_type = file.content_type or "application/octet-stream"
    try:
        return service.upload_document(key, data, content_type)
    except (UnsupportedFileTypeError, FileTooLargeError) as exc:
        raise HTTPException(status_code=400, detail=str(exc))