import Foundation#if canImport(FoundationNetworking)import FoundationNetworking#endif public struct CodexUsageResponse: Decodable, Sendable {    public let planType: PlanType?    public let rateLimit: RateLimitDetails?    public let credits: CreditDetails?    public let individualLimit: SpendControlLimitSnapshot?    /// Model-specific limits (e.g. GPT-5.3-Codex-Spark) that sit alongside the primary/weekly windows.    public let additionalRateLimits: [AdditionalRateLimit]?    let additionalRateLimitsDecodeFailed: Bool     enum CodingKeys: String, CodingKey {        case planType = "plan_type"        case rateLimit = "rate_limit"        case credits        case individualLimit = "individual_limit"        case individualLimitCamel = "individualLimit"        case additionalRateLimits = "additional_rate_limits"    }     public init(from decoder: Decoder) throws {        let container = try decoder.container(keyedBy: CodingKeys.self)        self.planType = try? container.decodeIfPresent(PlanType.self, forKey: .planType)        self.rateLimit = try? container.decodeIfPresent(RateLimitDetails.self, forKey: .rateLimit)        self.credits = try? container.decodeIfPresent(CreditDetails.self, forKey: .credits)        self.individualLimit = (try? container.decodeIfPresent(            SpendControlLimitSnapshot.self,            forKey: .individualLimit))            ?? (try? container.decodeIfPresent(SpendControlLimitSnapshot.self, forKey: .individualLimitCamel))        // Optional and additive: missing/malformed extra limits must never disturb primary/weekly mapping.        // Decode per element so a single malformed entry cannot discard its valid siblings; a non-array        // value (or absent field) leaves `additionalRateLimits` nil and primary/weekly mapping untouched.        let additionalRateLimitsHadValue = Self.hasNonNilValue(container: container, key: .additionalRateLimits)        do {            let decoded = try container.decodeIfPresent(                [LossyAdditionalRateLimit].self,                forKey: .additionalRateLimits)            self.additionalRateLimits = decoded?.compactMap(\.value)            self.additionalRateLimitsDecodeFailed = decoded?.contains(where: \.decodeFailed) == true                || self.additionalRateLimits?.contains(where: \.hasWindowDecodeFailure) == true        } catch {            self.additionalRateLimits = nil            self.additionalRateLimitsDecodeFailed = additionalRateLimitsHadValue        }    }     private static func hasNonNilValue(        container: KeyedDecodingContainer<CodingKeys>,        key: CodingKeys) -> Bool    {        guard container.contains(key) else { return false }        return (try? container.decodeNil(forKey: key)) == false    }     public enum PlanType: Sendable, Decodable, Equatable {        case guest        case free        case go        case plus        case pro        case freeWorkspace        case team        case business        case education        case quorum        case k12        case enterprise        case edu        case unknown(String)         public var rawValue: String {            switch self {            case .guest: "guest"            case .free: "free"            case .go: "go"            case .plus: "plus"            case .pro: "pro"            case .freeWorkspace: "free_workspace"            case .team: "team"            case .business: "business"            case .education: "education"            case .quorum: "quorum"            case .k12: "k12"            case .enterprise: "enterprise"            case .edu: "edu"            case let .unknown(value): value            }        }         public init(from decoder: Decoder) throws {            let container = try decoder.singleValueContainer()            let value = try container.decode(String.self)            switch value {            case "guest": self = .guest            case "free": self = .free            case "go": self = .go            case "plus": self = .plus            case "pro": self = .pro            case "free_workspace": self = .freeWorkspace            case "team": self = .team            case "business": self = .business            case "education": self = .education            case "quorum": self = .quorum            case "k12": self = .k12            case "enterprise": self = .enterprise            case "edu": self = .edu            default:                self = .unknown(value)            }        }    }     public struct RateLimitDetails: Decodable, Sendable {        public let primaryWindow: WindowSnapshot?        public let secondaryWindow: WindowSnapshot?        public let individualLimit: SpendControlLimitSnapshot?        let primaryWindowDecodeFailed: Bool        let secondaryWindowDecodeFailed: Bool         enum CodingKeys: String, CodingKey {            case primaryWindow = "primary_window"            case secondaryWindow = "secondary_window"            case individualLimit = "individual_limit"            case individualLimitCamel = "individualLimit"        }         public init(from decoder: Decoder) throws {            let container = try decoder.container(keyedBy: CodingKeys.self)            let primaryHadValue = Self.hasNonNilValue(container: container, key: .primaryWindow)            do {                self.primaryWindow = try container.decodeIfPresent(WindowSnapshot.self, forKey: .primaryWindow)                self.primaryWindowDecodeFailed = false            } catch {                self.primaryWindow = nil                self.primaryWindowDecodeFailed = primaryHadValue            }             let secondaryHadValue = Self.hasNonNilValue(container: container, key: .secondaryWindow)            do {                self.secondaryWindow = try container.decodeIfPresent(WindowSnapshot.self, forKey: .secondaryWindow)                self.secondaryWindowDecodeFailed = false            } catch {                self.secondaryWindow = nil                self.secondaryWindowDecodeFailed = secondaryHadValue            }            self.individualLimit = (try? container.decodeIfPresent(                SpendControlLimitSnapshot.self,                forKey: .individualLimit))                ?? (try? container.decodeIfPresent(SpendControlLimitSnapshot.self, forKey: .individualLimitCamel))        }         private static func hasNonNilValue(            container: KeyedDecodingContainer<CodingKeys>,            key: CodingKeys) -> Bool        {            guard container.contains(key) else { return false }            return (try? container.decodeNil(forKey: key)) == false        }         var hasWindowDecodeFailure: Bool {            self.primaryWindowDecodeFailed || self.secondaryWindowDecodeFailed        }    }     public struct WindowSnapshot: Decodable, Sendable {        public let usedPercent: Int        public let resetAt: Int        public let limitWindowSeconds: Int         enum CodingKeys: String, CodingKey {            case usedPercent = "used_percent"            case resetAt = "reset_at"            case limitWindowSeconds = "limit_window_seconds"        }    }     /// One entry of `additional_rate_limits`: a named, model-specific limit (e.g. GPT-5.3-Codex-Spark)    /// whose windows reuse the same shape as the primary/weekly `RateLimitDetails`.    public struct AdditionalRateLimit: Decodable, Sendable {        public let limitName: String?        public let meteredFeature: String?        public let rateLimit: RateLimitDetails?        let rateLimitDecodeFailed: Bool         enum CodingKeys: String, CodingKey {            case limitName = "limit_name"            case meteredFeature = "metered_feature"            case rateLimit = "rate_limit"        }         public init(from decoder: Decoder) throws {            let container = try decoder.container(keyedBy: CodingKeys.self)            self.limitName = try? container.decodeIfPresent(String.self, forKey: .limitName)            self.meteredFeature = try? container.decodeIfPresent(String.self, forKey: .meteredFeature)            let rateLimitHadValue = Self.hasNonNilValue(container: container, key: .rateLimit)            do {                self.rateLimit = try container.decodeIfPresent(RateLimitDetails.self, forKey: .rateLimit)                self.rateLimitDecodeFailed = false            } catch {                self.rateLimit = nil                self.rateLimitDecodeFailed = rateLimitHadValue            }        }         private static func hasNonNilValue(            container: KeyedDecodingContainer<CodingKeys>,            key: CodingKeys) -> Bool        {            guard container.contains(key) else { return false }            return (try? container.decodeNil(forKey: key)) == false        }         var hasWindowDecodeFailure: Bool {            self.rateLimitDecodeFailed || self.rateLimit?.hasWindowDecodeFailure == true        }    }     /// Decodes a single `additional_rate_limits` element without ever throwing, so one malformed    /// entry cannot discard its valid siblings during array decoding.    private struct LossyAdditionalRateLimit: Decodable {        let value: AdditionalRateLimit?        let decodeFailed: Bool         init(from decoder: Decoder) throws {            let container = try decoder.singleValueContainer()            self.value = try? container.decode(AdditionalRateLimit.self)            self.decodeFailed = self.value == nil        }    }     public struct SpendControlLimitSnapshot: Decodable, Sendable {        public let limit: Double?        public let used: Double?        public let remainingPercent: Double?        public let resetsAt: Int?         enum CodingKeys: String, CodingKey {            case limit            case used            case remainingPercent            case remainingPercentSnake = "remaining_percent"            case resetsAt            case resetsAtSnake = "resets_at"        }         public init(from decoder: Decoder) throws {            let container = try decoder.container(keyedBy: CodingKeys.self)            self.limit = Self.decodeFlexibleDouble(container, forKey: .limit)            self.used = Self.decodeFlexibleDouble(container, forKey: .used)            self.remainingPercent = Self.decodeFlexibleDouble(container, forKey: .remainingPercent)                ?? Self.decodeFlexibleDouble(container, forKey: .remainingPercentSnake)            self.resetsAt = Self.decodeFlexibleInt(container, forKey: .resetsAt)                ?? Self.decodeFlexibleInt(container, forKey: .resetsAtSnake)        }         private static func decodeFlexibleDouble(            _ container: KeyedDecodingContainer<CodingKeys>,            forKey key: CodingKeys) -> Double?        {            if let value = try? container.decodeIfPresent(Double.self, forKey: key) {                return value            }            if let value = try? container.decodeIfPresent(Int.self, forKey: key) {                return Double(value)            }            if let value = try? container.decodeIfPresent(String.self, forKey: key) {                return Double(value.trimmingCharacters(in: .whitespacesAndNewlines))            }            return nil        }         private static func decodeFlexibleInt(            _ container: KeyedDecodingContainer<CodingKeys>,            forKey key: CodingKeys) -> Int?        {            if let value = try? container.decodeIfPresent(Int.self, forKey: key) {                return value            }            if let value = try? container.decodeIfPresent(Double.self, forKey: key) {                return Int(value)            }            if let value = try? container.decodeIfPresent(String.self, forKey: key) {                return Int(value.trimmingCharacters(in: .whitespacesAndNewlines))            }            return nil        }    }     public struct CreditDetails: Decodable, Sendable {        public let hasCredits: Bool        public let unlimited: Bool        public let balance: Double?         enum CodingKeys: String, CodingKey {            case hasCredits = "has_credits"            case unlimited            case balance        }         public init(from decoder: Decoder) throws {            let container = try decoder.container(keyedBy: CodingKeys.self)            self.hasCredits = (try? container.decode(Bool.self, forKey: .hasCredits)) ?? false            self.unlimited = (try? container.decode(Bool.self, forKey: .unlimited)) ?? false            if let balance = try? container.decode(Double.self, forKey: .balance) {                self.balance = balance            } else if let balance = try? container.decode(String.self, forKey: .balance),                      let value = Double(balance)            {                self.balance = value            } else {                self.balance = nil            }        }    }} public enum CodexOAuthFetchError: LocalizedError, Sendable {    case unauthorized    case invalidResponse    case serverError(Int, String?)    case networkError(Error)     public var errorDescription: String? {        switch self {        case .unauthorized:            return "Codex OAuth token expired or invalid. Run `codex` to re-authenticate."        case .invalidResponse:            return "Invalid response from Codex usage API."        case let .serverError(code, message):            if let message, !message.isEmpty {                return "Codex API error \(code): \(message)"            }            return "Codex API error \(code)."        case let .networkError(error):            return "Network error: \(error.localizedDescription)"        }    }} public enum CodexOAuthUsageFetcher {    private static let defaultChatGPTBaseURL = "https://chatgpt.com/backend-api/"    private static let chatGPTUsagePath = "/wham/usage"    private static let codexUsagePath = "/api/codex/usage"    private static let rateLimitResetCreditsPath = "/wham/rate-limit-reset-credits"     public static func fetchUsage(        accessToken: String,        accountId: String?,        env: [String: String] = ProcessInfo.processInfo.environment) async throws -> CodexUsageResponse    {        try await self.fetchUsage(            accessToken: accessToken,            accountId: accountId,            env: env,            session: CodexAuthenticatedHTTPTransport.current)    }     public static func fetchUsage(        accessToken: String,        accountId: String?,        env: [String: String] = ProcessInfo.processInfo.environment,        session transport: any ProviderHTTPTransport) async throws -> CodexUsageResponse    {        var request = URLRequest(            url: Self.resolveUsageURL(env: env),            cachePolicy: .reloadIgnoringLocalCacheData,            timeoutInterval: 30)        request.httpMethod = "GET"        request.setValue("Bearer \(accessToken)", forHTTPHeaderField: "Authorization")        request.setValue("CodexBar", forHTTPHeaderField: "User-Agent")        request.setValue("application/json", forHTTPHeaderField: "Accept")         if let accountId, !accountId.isEmpty {            request.setValue(accountId, forHTTPHeaderField: "ChatGPT-Account-Id")        }         do {            let response = try await transport.response(for: request)            let data = response.data             switch response.statusCode {            case 200...299:                do {                    return try JSONDecoder().decode(CodexUsageResponse.self, from: data)                } catch {                    throw CodexOAuthFetchError.invalidResponse                }            case 401, 403:                throw CodexOAuthFetchError.unauthorized            default:                let body = String(data: data, encoding: .utf8)                throw CodexOAuthFetchError.serverError(response.statusCode, body)            }        } catch let error as CodexOAuthFetchError {            throw error        } catch is CancellationError {            throw CancellationError()        } catch {            if Task.isCancelled || (error as? URLError)?.code == .cancelled {                throw CancellationError()            }            throw CodexOAuthFetchError.networkError(error)        }    }     public static func fetchRateLimitResetCredits(        accessToken: String,        accountId: String?,        env: [String: String] = ProcessInfo.processInfo.environment,        timeout: TimeInterval = 4) async throws -> CodexRateLimitResetCreditsSnapshot    {        try await self.fetchRateLimitResetCredits(            accessToken: accessToken,            accountId: accountId,            env: env,            timeout: timeout,            session: CodexAuthenticatedHTTPTransport.current)    }     public static func fetchRateLimitResetCredits(        accessToken: String,        accountId: String?,        env: [String: String] = ProcessInfo.processInfo.environment,        timeout: TimeInterval = 4,        session transport: any ProviderHTTPTransport) async throws        -> CodexRateLimitResetCreditsSnapshot    {        var request = URLRequest(            url: Self.resolveRateLimitResetCreditsURL(env: env),            cachePolicy: .reloadIgnoringLocalCacheData,            timeoutInterval: timeout)        request.httpMethod = "GET"        request.setValue("Bearer \(accessToken)", forHTTPHeaderField: "Authorization")        request.setValue("CodexBar", forHTTPHeaderField: "User-Agent")        request.setValue("application/json", forHTTPHeaderField: "Accept")        request.setValue("codex-1", forHTTPHeaderField: "OpenAI-Beta")        request.setValue("Codex Desktop", forHTTPHeaderField: "originator")         if let accountId, !accountId.isEmpty {            request.setValue(accountId, forHTTPHeaderField: "ChatGPT-Account-ID")        }         do {            let response = try await transport.response(for: request)            let data = response.data             switch response.statusCode {            case 200...299:                do {                    let decoder = JSONDecoder()                    decoder.dateDecodingStrategy = .custom(Self.decodeISO8601Date)                    let payload = try decoder.decode(RateLimitResetCreditsResponse.self, from: data)                    guard payload.availableCount >= 0 else {                        throw CodexOAuthFetchError.invalidResponse                    }                    return CodexRateLimitResetCreditsSnapshot(                        credits: payload.credits.map(\.model),                        availableCount: payload.availableCount,                        updatedAt: Date())                } catch {                    throw CodexOAuthFetchError.invalidResponse                }            case 401, 403:                throw CodexOAuthFetchError.unauthorized            default:                let body = String(data: data, encoding: .utf8)                throw CodexOAuthFetchError.serverError(response.statusCode, body)            }        } catch let error as CodexOAuthFetchError {            throw error        } catch is CancellationError {            throw CancellationError()        } catch {            if Task.isCancelled || (error as? URLError)?.code == .cancelled {                throw CancellationError()            }            throw CodexOAuthFetchError.networkError(error)        }    }     private static func resolveUsageURL(env: [String: String]) -> URL {        self.resolveUsageURL(env: env, configContents: nil)    }     private static func resolveUsageURL(env: [String: String], configContents: String?) -> URL {        let baseURL = self.resolveChatGPTBaseURL(env: env, configContents: configContents)        let normalized = self.normalizeChatGPTBaseURL(baseURL)        let path = normalized.contains("/backend-api") ? Self.chatGPTUsagePath : Self.codexUsagePath        let full = normalized + path        return URL(string: full) ?? URL(string: Self.defaultChatGPTBaseURL + Self.chatGPTUsagePath)!    }     private static func resolveRateLimitResetCreditsURL(env: [String: String]) -> URL {        self.resolveRateLimitResetCreditsURL(env: env, configContents: nil)    }     private static func resolveRateLimitResetCreditsURL(env: [String: String], configContents: String?) -> URL {

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