1use std::fmt;
  2use std::sync::Arc;
  3
  4use anyhow::Result;
  5use client::Client;
  6use cloud_api_types::websocket_protocol::MessageToClient;
  7use cloud_llm_client::Plan;
  8use gpui::{App, AppContext as _, Context, Entity, EventEmitter, Global, ReadGlobal as _};
  9use smol::lock::{RwLock, RwLockUpgradableReadGuard, RwLockWriteGuard};
 10use thiserror::Error;
 11
 12#[derive(Error, Debug)]
 13pub struct PaymentRequiredError;
 14
 15impl fmt::Display for PaymentRequiredError {
 16    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 17        write!(
 18            f,
 19            "Payment required to use this language model. Please upgrade your account."
 20        )
 21    }
 22}
 23
 24#[derive(Error, Debug)]
 25pub struct ModelRequestLimitReachedError {
 26    pub plan: Plan,
 27}
 28
 29impl fmt::Display for ModelRequestLimitReachedError {
 30    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 31        let message = match self.plan {
 32            Plan::ZedFree => "Model request limit reached. Upgrade to Zed Pro for more requests.",
 33            Plan::ZedPro => {
 34                "Model request limit reached. Upgrade to usage-based billing for more requests."
 35            }
 36            Plan::ZedProTrial => {
 37                "Model request limit reached. Upgrade to Zed Pro for more requests."
 38            }
 39        };
 40
 41        write!(f, "{message}")
 42    }
 43}
 44
 45#[derive(Error, Debug)]
 46pub struct ToolUseLimitReachedError;
 47
 48impl fmt::Display for ToolUseLimitReachedError {
 49    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
 50        write!(
 51            f,
 52            "Consecutive tool use limit reached. Enable Burn Mode for unlimited tool use."
 53        )
 54    }
 55}
 56
 57#[derive(Clone, Default)]
 58pub struct LlmApiToken(Arc<RwLock<Option<String>>>);
 59
 60impl LlmApiToken {
 61    pub async fn acquire(&self, client: &Arc<Client>) -> Result<String> {
 62        let lock = self.0.upgradable_read().await;
 63        if let Some(token) = lock.as_ref() {
 64            Ok(token.to_string())
 65        } else {
 66            Self::fetch(RwLockUpgradableReadGuard::upgrade(lock).await, client).await
 67        }
 68    }
 69
 70    pub async fn refresh(&self, client: &Arc<Client>) -> Result<String> {
 71        Self::fetch(self.0.write().await, client).await
 72    }
 73
 74    async fn fetch(
 75        mut lock: RwLockWriteGuard<'_, Option<String>>,
 76        client: &Arc<Client>,
 77    ) -> Result<String> {
 78        let system_id = client
 79            .telemetry()
 80            .system_id()
 81            .map(|system_id| system_id.to_string());
 82
 83        let response = client.cloud_client().create_llm_token(system_id).await?;
 84        *lock = Some(response.token.0.clone());
 85        Ok(response.token.0)
 86    }
 87}
 88
 89struct GlobalRefreshLlmTokenListener(Entity<RefreshLlmTokenListener>);
 90
 91impl Global for GlobalRefreshLlmTokenListener {}
 92
 93pub struct RefreshLlmTokenEvent;
 94
 95pub struct RefreshLlmTokenListener;
 96
 97impl EventEmitter<RefreshLlmTokenEvent> for RefreshLlmTokenListener {}
 98
 99impl RefreshLlmTokenListener {
100    pub fn register(client: Arc<Client>, cx: &mut App) {
101        let listener = cx.new(|cx| RefreshLlmTokenListener::new(client, cx));
102        cx.set_global(GlobalRefreshLlmTokenListener(listener));
103    }
104
105    pub fn global(cx: &App) -> Entity<Self> {
106        GlobalRefreshLlmTokenListener::global(cx).0.clone()
107    }
108
109    fn new(client: Arc<Client>, cx: &mut Context<Self>) -> Self {
110        client.add_message_to_client_handler({
111            let this = cx.entity();
112            move |message, cx| {
113                Self::handle_refresh_llm_token(this.clone(), message, cx);
114            }
115        });
116
117        Self
118    }
119
120    fn handle_refresh_llm_token(this: Entity<Self>, message: &MessageToClient, cx: &mut App) {
121        match message {
122            MessageToClient::UserUpdated => {
123                this.update(cx, |_this, cx| cx.emit(RefreshLlmTokenEvent));
124            }
125        }
126    }
127}