from fastapi import APIRouter, Depends, status
from sqlalchemy.ext.asyncio import AsyncSession

from app.auth.service import get_current_user
from app.database.session import get_db
from app.messages.schemas import MessageCreateRequest, MessageForwardRequest, MessageRead, MessageStatusUpdateRequest, MessageUpdateRequest
from app.messages.service import (
    create_chat_message,
    delete_message,
    delete_message_for_all,
    forward_message,
    get_messages,
    search_messages,
    update_message,
)
from app.realtime.schemas import MessageStatusPayload
from app.realtime.service import realtime_gateway
from app.users.models import User

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


@router.post("", response_model=MessageRead, status_code=status.HTTP_201_CREATED)
async def create_message(
    payload: MessageCreateRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
) -> MessageRead:
    message = await create_chat_message(db, sender_id=current_user.id, payload=payload)
    await realtime_gateway.publish_message_created(
        message=message,
        sender_id=current_user.id,
        client_message_id=payload.client_message_id,
    )
    return message


@router.get("/search", response_model=list[MessageRead])
async def search_messages_endpoint(
    query: str,
    chat_id: int | None = None,
    limit: int = 50,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
) -> list[MessageRead]:
    return await search_messages(db, user_id=current_user.id, query=query, chat_id=chat_id, limit=limit)


@router.get("/{chat_id}", response_model=list[MessageRead])
async def list_messages(
    chat_id: int,
    limit: int = 50,
    before_id: int | None = None,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
) -> list[MessageRead]:
    return await get_messages(db, chat_id=chat_id, user_id=current_user.id, limit=limit, before_id=before_id)


@router.put("/{message_id}", response_model=MessageRead)
async def edit_message(
    message_id: int,
    payload: MessageUpdateRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
) -> MessageRead:
    return await update_message(db, message_id=message_id, user_id=current_user.id, payload=payload)


@router.delete("/{message_id}", status_code=status.HTTP_204_NO_CONTENT)
async def remove_message(
    message_id: int,
    for_all: bool = False,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
) -> None:
    if for_all:
        await delete_message_for_all(db, message_id=message_id, user_id=current_user.id)
        return
    await delete_message(db, message_id=message_id, user_id=current_user.id)


@router.post("/status")
async def update_status(
    payload: MessageStatusUpdateRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
) -> dict[str, int]:
    return await realtime_gateway.handle_message_status(
        db,
        user_id=current_user.id,
        payload=MessageStatusPayload(chat_id=payload.chat_id, message_id=payload.message_id),
        event=payload.status,
    )


@router.post("/{message_id}/forward", response_model=MessageRead, status_code=status.HTTP_201_CREATED)
async def forward_message_endpoint(
    message_id: int,
    payload: MessageForwardRequest,
    db: AsyncSession = Depends(get_db),
    current_user: User = Depends(get_current_user),
) -> MessageRead:
    message = await forward_message(db, source_message_id=message_id, sender_id=current_user.id, payload=payload)
    await realtime_gateway.publish_message_created(message=message, sender_id=current_user.id)
    return message