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/**
* @license
* Copyright 2025 Google LLC
* SPDX-License-Identifier: Apache-2.0
*/
import {
AuthType,
UserTierId,
DEFAULT_GEMINI_FLASH_MODEL,
DEFAULT_GEMINI_MODEL,
isProQuotaExceededError,
isGenericQuotaExceededError,
isApiError,
isStructuredError,
} from '@google/gemini-cli-core';
// Free Tier message functions
const getRateLimitErrorMessageGoogleFree = (
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nPossible quota limitations in place or slow response times detected. Switching to the ${fallbackModel} model for the rest of this session.`;
const getRateLimitErrorMessageGoogleProQuotaFree = (
currentModel: string = DEFAULT_GEMINI_MODEL,
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nYou have reached your daily ${currentModel} quota limit. You will be switched to the ${fallbackModel} model for the rest of this session. To increase your limits, upgrade to a Gemini Code Assist Standard or Enterprise plan with higher limits at https://goo.gle/set-up-gemini-code-assist, or use /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
const getRateLimitErrorMessageGoogleGenericQuotaFree = () =>
`\nYou have reached your daily quota limit. To increase your limits, upgrade to a Gemini Code Assist Standard or Enterprise plan with higher limits at https://goo.gle/set-up-gemini-code-assist, or use /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
// Legacy/Standard Tier message functions
const getRateLimitErrorMessageGooglePaid = (
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nPossible quota limitations in place or slow response times detected. Switching to the ${fallbackModel} model for the rest of this session. We appreciate you for choosing Gemini Code Assist and the Gemini CLI.`;
const getRateLimitErrorMessageGoogleProQuotaPaid = (
currentModel: string = DEFAULT_GEMINI_MODEL,
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nYou have reached your daily ${currentModel} quota limit. You will be switched to the ${fallbackModel} model for the rest of this session. We appreciate you for choosing Gemini Code Assist and the Gemini CLI. To continue accessing the ${currentModel} model today, consider using /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
const getRateLimitErrorMessageGoogleGenericQuotaPaid = (
currentModel: string = DEFAULT_GEMINI_MODEL,
) =>
`\nYou have reached your daily quota limit. We appreciate you for choosing Gemini Code Assist and the Gemini CLI. To continue accessing the ${currentModel} model today, consider using /auth to switch to using a paid API key from AI Studio at https://aistudio.google.com/apikey`;
const RATE_LIMIT_ERROR_MESSAGE_USE_GEMINI =
'\nPlease wait and try again later. To increase your limits, request a quota increase through AI Studio, or switch to another /auth method';
const RATE_LIMIT_ERROR_MESSAGE_VERTEX =
'\nPlease wait and try again later. To increase your limits, request a quota increase through Vertex, or switch to another /auth method';
const getRateLimitErrorMessageDefault = (
fallbackModel: string = DEFAULT_GEMINI_FLASH_MODEL,
) =>
`\nPossible quota limitations in place or slow response times detected. Switching to the ${fallbackModel} model for the rest of this session.`;
function getRateLimitMessage(
authType?: AuthType,
error?: unknown,
userTier?: UserTierId,
currentModel?: string,
fallbackModel?: string,
): string {
switch (authType) {
case AuthType.LOGIN_WITH_GOOGLE: {
// Determine if user is on a paid tier (Legacy or Standard) - default to FREE if not specified
const isPaidTier =
userTier === UserTierId.LEGACY || userTier === UserTierId.STANDARD;
if (isProQuotaExceededError(error)) {
return isPaidTier
? getRateLimitErrorMessageGoogleProQuotaPaid(
currentModel || DEFAULT_GEMINI_MODEL,
fallbackModel,
)
: getRateLimitErrorMessageGoogleProQuotaFree(
currentModel || DEFAULT_GEMINI_MODEL,
fallbackModel,
);
} else if (isGenericQuotaExceededError(error)) {
return isPaidTier
? getRateLimitErrorMessageGoogleGenericQuotaPaid(
currentModel || DEFAULT_GEMINI_MODEL,
)
: getRateLimitErrorMessageGoogleGenericQuotaFree();
} else {
return isPaidTier
? getRateLimitErrorMessageGooglePaid(fallbackModel)
: getRateLimitErrorMessageGoogleFree(fallbackModel);
}
}
case AuthType.USE_GEMINI:
return RATE_LIMIT_ERROR_MESSAGE_USE_GEMINI;
case AuthType.USE_VERTEX_AI:
return RATE_LIMIT_ERROR_MESSAGE_VERTEX;
default:
return getRateLimitErrorMessageDefault(fallbackModel);
}
}
export function parseAndFormatApiError(
error: unknown,
authType?: AuthType,
userTier?: UserTierId,
currentModel?: string,
fallbackModel?: string,
): string {
if (isStructuredError(error)) {
let text = `[API Error: ${error.message}]`;
if (error.status === 429) {
text += getRateLimitMessage(
authType,
error,
userTier,
currentModel,
fallbackModel,
);
}
return text;
}
// The error message might be a string containing a JSON object.
if (typeof error === 'string') {
const jsonStart = error.indexOf('{');
if (jsonStart === -1) {
return `[API Error: ${error}]`; // Not a JSON error, return as is.
}
const jsonString = error.substring(jsonStart);
try {
const parsedError = JSON.parse(jsonString) as unknown;
if (isApiError(parsedError)) {
let finalMessage = parsedError.error.message;
try {
// See if the message is a stringified JSON with another error
const nestedError = JSON.parse(finalMessage) as unknown;
if (isApiError(nestedError)) {
finalMessage = nestedError.error.message;
}
} catch (_e) {
// It's not a nested JSON error, so we just use the message as is.
}
let text = `[API Error: ${finalMessage} (Status: ${parsedError.error.status})]`;
if (parsedError.error.code === 429) {
text += getRateLimitMessage(
authType,
parsedError,
userTier,
currentModel,
fallbackModel,
);
}
return text;
}
} catch (_e) {
// Not a valid JSON, fall through and return the original message.
}
return `[API Error: ${error}]`;
}
return '[API Error: An unknown error occurred.]';
}
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