aether-wisp 0.7.8

use super::session::builtin_commands;
use super::{App, ExitState, ForegroundOperation, Overlay, Route};
use crate::command::{AgentCommand, Command, GitReviewCommand, TerminalCommand};
use crate::screens::artifact_review::ArtifactReviewScreen;
use crate::surfaces::modal::ElicitationModal;
use crate::surfaces::picker::CommandEntry;
use crate::surfaces::session_picker::SessionPicker;
use acp_utils::client::AcpEvent;
use acp_utils::conversation::TurnFinished;
use acp_utils::notifications::McpNotification;
use agent_client_protocol::schema::v2::{self as acp, CreateElicitationRequest, ElicitationMode, SessionId, SessionUpdate};
use utils::artifact_review::ArtifactReviewElicitationMeta;

impl App {
    #[allow(clippy::too_many_lines)]
    pub fn on_acp_event(&mut self, event: AcpEvent) {
        let current = self.is_current(&event);
        if current
            && let Some(TurnFinished { stop_reason }) = self.conversation.apply_event(&event)
            && stop_reason != Some(acp::StopReason::Cancelled)
        {
            self.queue(Command::Terminal(TerminalCommand::RingBell));
        }
        match event {
            AcpEvent::SessionUpdate(notification) if current => self.on_session_update(&notification.update),
            AcpEvent::ContextCleared(_) if current => self.foreground.drop_prepared_prompt(),
            AcpEvent::ElicitationRequest { params, responder } => {
                let params = *params;
                self.close_elicitation_owner();
                if let Some(meta) = artifact_review_meta(&params) {
                    self.open_route(Route::ArtifactReview(Box::new(ArtifactReviewScreen::new(meta, responder))));
                    return;
                }
                // The settings overlay answers its own elicitations in place so
                // an OAuth prompt does not tear down the pane that started it.
                if let Some(Overlay::Settings(overlay)) = self.overlay.as_mut() {
                    overlay.on_elicitation_request(
                        params,
                        responder,
                        self.browser_opener.clone(),
                        self.clipboard_writer.clone(),
                    );
                    return;
                }
                if let Some(modal) = ElicitationModal::with_url_handlers(
                    params,
                    responder,
                    self.browser_opener.clone(),
                    self.clipboard_writer.clone(),
                ) {
                    self.open_overlay(Overlay::Elicitation(modal));
                }
            }
            AcpEvent::McpNotification(notification) => self.on_mcp_notification(&notification),
            AcpEvent::GitDiffEvent(params) => {
                self.queue(Command::GitReview(GitReviewCommand::Forward(params.event)));
            }
            AcpEvent::AuthMethodsUpdated(params) => {
                self.session.set_auth_methods(&params.auth_methods);
                if let Some(Overlay::Settings(overlay)) = self.overlay.as_mut() {
                    overlay.update_auth_methods(&params.auth_methods);
                }
            }
            AcpEvent::ConnectionClosed => self.on_connection_closed(),
            AcpEvent::SessionUpdate(_) | AcpEvent::ContextCleared(_) | AcpEvent::SubAgentProgress(_) => {}
        }
    }

    /// Reports why a workspace move could not proceed and leaves move mode.
    pub(super) fn abandon_workspace_move(&mut self, message: &str) {
        self.notify(message);
        self.foreground = ForegroundOperation::Idle;
    }

    pub(super) fn open_session_picker(&mut self, sessions: Vec<acp::SessionInfo>) {
        let current_id = self.session.session_id().clone();
        let others = sessions.into_iter().filter(|session| session.session_id != current_id).collect();
        let picker = SessionPicker::new(others, self.session.capabilities().session_preview);
        if let Some(id) = picker.initial_preview_request() {
            self.queue(Command::Agent(AgentCommand::SessionPreview { session_id: id }));
        }
        self.open_overlay(Overlay::Sessions(picker));
    }

    pub(super) fn on_resumed_session(&mut self, session_id: &SessionId, response: acp::ResumeSessionResponse) {
        match &self.foreground {
            ForegroundOperation::ResumingSession { session_id: expected, cwd }
            | ForegroundOperation::LoadingWorkspaceSession { session_id: expected, cwd }
                if expected == session_id =>
            {
                if self.session.working_dir() != cwd {
                    let cwd = cwd.clone();
                    self.session.set_working_dir(cwd.clone());
                    self.resolve_workspace(cwd);
                }
            }
            _ => return,
        }
        self.session.update_config_options(response.config_options);
        if matches!(self.foreground, ForegroundOperation::LoadingWorkspaceSession { .. }) {
            self.notify(&format!("Moved to {}", self.session.working_dir().display()));
        }
        self.return_to_conversation();
        self.foreground = ForegroundOperation::Idle;
    }

    pub(super) fn on_new_session(&mut self, session_id: SessionId, config_options: Vec<acp::SessionConfigOption>) {
        if !matches!(self.foreground, ForegroundOperation::CreatingSession { .. })
            && !self.can_start_foreground_operation()
        {
            return;
        }
        let previous_selections = match std::mem::take(&mut self.foreground) {
            ForegroundOperation::CreatingSession { previous_selections } => previous_selections,
            _ => Vec::new(),
        };
        self.close_elicitation_owner();
        self.return_to_conversation();
        self.session.set_session(session_id, config_options);
        self.restore_config_selections(&previous_selections);
    }

    /// Server notifications feed the status summary in the status line and settings overlay.
    fn on_mcp_notification(&mut self, notification: &McpNotification) {
        let McpNotification::ServerStatus { servers } = notification;
        self.session.update_server_statuses(servers);
        let servers = servers.clone();
        if let Some(Overlay::Settings(overlay)) = self.overlay.as_mut() {
            overlay.update_server_statuses(servers);
        }
    }

    /// The connection is gone, but a remote agent may still be running.
    /// Release local interactions and overlays, then ask the event loop to exit.
    fn on_connection_closed(&mut self) {
        self.close_elicitation_owner();
        self.return_to_conversation();
        self.foreground = ForegroundOperation::Idle;
        self.commands.retain(|command| !matches!(command, Command::Terminal(TerminalCommand::RingBell)));
        self.exit_state = ExitState::ConnectionLost;
    }

    /// Answers any elicitation the current route or overlay is holding, leaving the
    /// settings overlay itself open so its pane survives.
    fn close_elicitation_owner(&mut self) {
        match self.overlay.as_mut() {
            Some(Overlay::Settings(overlay)) => overlay.cancel_pending_elicitation(),
            Some(Overlay::Elicitation(_)) => self.close_overlay(),
            _ => {}
        }
    }

    /// Whether an event concerns the session on screen. A session being created has no id yet, so every
    /// event is taken to be for it.
    fn is_current(&self, event: &AcpEvent) -> bool {
        event.session_id().is_none_or(|session_id| session_id == self.session.session_id())
            || matches!(self.foreground, ForegroundOperation::CreatingSession { .. })
    }

    fn on_session_update(&mut self, update: &SessionUpdate) {
        match update {
            SessionUpdate::AvailableCommandsUpdate(update) => {
                let agent_commands: Vec<_> = update
                    .available_commands
                    .iter()
                    .map(|command| CommandEntry {
                        name: command.name.clone(),
                        description: command.description.clone(),
                        has_input: command.input.is_some(),
                        hint: match &command.input {
                            Some(acp::AvailableCommandInput::Text(input)) => Some(input.hint.clone()),
                            _ => None,
                        },
                        builtin: false,
                    })
                    .collect();
                let mut all = builtin_commands(self.session.capabilities());
                all.extend(agent_commands);
                self.available_commands = all;
            }
            SessionUpdate::ConfigOptionUpdate(update) => {
                self.session.update_config_options(update.config_options.clone());
                if let Some(Overlay::Settings(overlay)) = self.overlay.as_mut() {
                    overlay.update_config_options(self.session.config_options());
                }
            }
            _ => {}
        }
    }
}

pub(super) fn artifact_review_meta(params: &CreateElicitationRequest) -> Option<ArtifactReviewElicitationMeta> {
    if !matches!(params.mode, ElicitationMode::Form(_)) {
        return None;
    }
    ArtifactReviewElicitationMeta::parse(params.meta.as_ref())
}