use room::ws_context::WsUserContext;
use uuid::Uuid;

use crate::error::AppTransportError;
use crate::event::reaction;
use crate::handler::session::TransportSession;
use crate::handler::types::WsOutEvent;

pub(crate) async fn reaction_add(
    session: &TransportSession,
    room: models::RoomId,
    message: Uuid,
    emoji: String,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    let ctx = WsUserContext::new(session.user.user_id);
    let rxs = session
        .service
        .room
        .message_reaction_add(message, emoji, &ctx)
        .await
        .map_err(|e| {
            tracing::warn!(error = %e, "message_reaction_add failed");
            AppTransportError::Internal
        })?;
    Ok(Some(build_reaction_batch(room, message, rxs.reactions)))
}

pub(crate) async fn reaction_remove(
    session: &TransportSession,
    room: models::RoomId,
    message: Uuid,
    emoji: String,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    let ctx = WsUserContext::new(session.user.user_id);
    let rxs = session
        .service
        .room
        .message_reaction_remove(message, emoji, &ctx)
        .await
        .map_err(|e| {
            tracing::warn!(error = %e, "message_reaction_remove failed");
            AppTransportError::Internal
        })?;
    Ok(Some(build_reaction_batch(room, message, rxs.reactions)))
}

fn build_reaction_batch(
    room: models::RoomId,
    message: Uuid,
    reactions: Vec<room::ReactionGroupResponse>,
) -> WsOutEvent {
    WsOutEvent::ReactionBatchUpdated {
        room_id: room,
        data: reaction::ReactionBatchUpdatedService {
            room,
            message,
            reactions: reactions
                .into_iter()
                .map(|g| reaction::ReactionGroup {
                    emoji: g.emoji,
                    count: g.count as i64,
                    reacted_by_me: g.reacted_by_me,
                    users: g
                        .users
                        .iter()
                        .filter_map(|u| u.parse::<Uuid>().ok())
                        .collect(),
                })
                .collect(),
        },
    }
}

pub(crate) async fn thread_create(
    session: &TransportSession,
    room: models::RoomId,
    parent: i64,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    let ctx = WsUserContext::new(session.user.user_id);
    session
        .service
        .room
        .room_thread_create(
            room,
            room::RoomThreadCreateRequest { parent_seq: parent },
            &ctx,
        )
        .await
        .map_err(|e| {
            tracing::warn!(error = %e, "room_thread_create failed");
            AppTransportError::Internal
        })?;
    Ok(None)
}

pub(crate) async fn thread_resolve(
    thread_id: models::RoomThreadId,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    tracing::info!(%thread_id, "Thread resolved");
    Ok(None)
}

pub(crate) async fn thread_archive(
    thread_id: models::RoomThreadId,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    tracing::info!(%thread_id, "Thread archived");
    Ok(None)
}

pub(crate) async fn pin_add(
    session: &TransportSession,
    message: Uuid,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    let ctx = WsUserContext::new(session.user.user_id);
    session
        .service
        .room
        .room_pin_add(message, &ctx)
        .await
        .map_err(|e| {
            tracing::warn!(error = %e, "room_pin_add failed");
            AppTransportError::Internal
        })?;
    Ok(None)
}

pub(crate) async fn pin_remove(
    session: &TransportSession,
    message: Uuid,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    let ctx = WsUserContext::new(session.user.user_id);
    session
        .service
        .room
        .room_pin_remove(message, &ctx)
        .await
        .map_err(|e| {
            tracing::warn!(error = %e, "room_pin_remove failed");
            AppTransportError::Internal
        })?;
    Ok(None)
}

pub(crate) async fn draft_save(
    session: &TransportSession,
    room: models::RoomId,
    content: String,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    let ctx = WsUserContext::new(session.user.user_id);
    let draft = session
        .service
        .room
        .draft_save(room, content, &ctx)
        .await
        .map_err(|e| {
            tracing::warn!(error = %e, "draft_save failed");
            AppTransportError::Internal
        })?;
    Ok(Some(WsOutEvent::DraftSaved {
        room_id: room,
        data: crate::event::draft::DraftSavedService {
            user_id: session.user.user_id,
            room: draft.room_id,
            content: draft.content,
            saved_at: draft.saved_at,
        },
    }))
}

pub(crate) async fn draft_clear(
    session: &TransportSession,
    room: models::RoomId,
) -> Result<Option<WsOutEvent>, AppTransportError> {
    let ctx = WsUserContext::new(session.user.user_id);
    session
        .service
        .room
        .draft_clear(room, &ctx)
        .await
        .map_err(|e| {
            tracing::warn!(error = %e, "draft_clear failed");
            AppTransportError::Internal
        })?;
    Ok(Some(WsOutEvent::DraftCleared {
        room_id: room,
        data: crate::event::draft::DraftClearedService {
            user_id: session.user.user_id,
            room,
            cleared_at: chrono::Utc::now(),
        },
    }))
}