import AppKitimport CodexBarCoreimport Foundationimport SwiftUI struct StepFunProviderImplementation: ProviderImplementation {    let id: UsageProvider = .stepfun     @MainActor    func presentation(context _: ProviderPresentationContext) -> ProviderPresentation {        ProviderPresentation { _ in "web" }    }     @MainActor    func observeSettings(_ settings: SettingsStore) {        _ = settings.stepfunCookieSource        _ = settings.stepfunUsername        _ = settings.stepfunPassword        _ = settings.stepfunToken    }     @MainActor    func isAvailable(context: ProviderAvailabilityContext) -> Bool {        // Available if any auth method is configured        if !context.settings.stepfunUsername.isEmpty, !context.settings.stepfunPassword.isEmpty {            return true        }        if context.settings.stepfunCookieSource == .manual, !context.settings.stepfunToken.isEmpty {            return true        }        if CookieHeaderCache.load(provider: .stepfun) != nil {            return true        }        if StepFunSettingsReader.username(environment: context.environment) != nil,           StepFunSettingsReader.password(environment: context.environment) != nil        {            return true        }        if StepFunSettingsReader.token(environment: context.environment) != nil {            return true        }        return false    }     @MainActor    func settingsSnapshot(context: ProviderSettingsSnapshotContext) -> ProviderSettingsSnapshotContribution? {        .stepfun(context.settings.stepfunSettingsSnapshot(tokenOverride: context.tokenOverride))    }     @MainActor    func tokenAccountsVisibility(context: ProviderSettingsContext, support: TokenAccountSupport) -> Bool {        guard support.requiresManualCookieSource else { return true }        if !context.settings.tokenAccounts(for: context.provider).isEmpty { return true }        return context.settings.stepfunCookieSource == .manual    }     @MainActor    func applyTokenAccountCookieSource(settings: SettingsStore) {        if settings.stepfunCookieSource != .manual {            settings.stepfunCookieSource = .manual        }    }     // MARK: - Settings Pickers     @MainActor    func settingsPickers(context: ProviderSettingsContext) -> [ProviderSettingsPickerDescriptor] {        let cookieBinding = Binding(            get: { context.settings.stepfunCookieSource.rawValue },            set: { raw in                context.settings.stepfunCookieSource = ProviderCookieSource(rawValue: raw) ?? .auto            })        let cookieOptions = ProviderCookieSourceUI.options(            allowsOff: true,            keychainDisabled: context.settings.debugDisableKeychainAccess)         let cookieSubtitle: () -> String? = {            ProviderCookieSourceUI.subtitle(                source: context.settings.stepfunCookieSource,                keychainDisabled: context.settings.debugDisableKeychainAccess,                auto: "Uses username + password to login and obtain an Oasis-Token automatically.",                manual: "Manually paste an Oasis-Token from a browser session.",                off: "StepFun authentication is disabled.")        }         return [            ProviderSettingsPickerDescriptor(                id: "stepfun-cookie-source",                title: "Auth source",                subtitle: "Uses username + password to login and obtain an Oasis-Token automatically.",                dynamicSubtitle: cookieSubtitle,                binding: cookieBinding,                options: cookieOptions,                isVisible: nil,                onChange: nil,                trailingText: {                    ProviderCookieSourceUI.cachedTrailingText(provider: .stepfun)                }),        ]    }     // MARK: - Settings Fields     @MainActor    func settingsFields(context: ProviderSettingsContext) -> [ProviderSettingsFieldDescriptor] {        // Auto mode: show username + password fields        let autoFields: [ProviderSettingsFieldDescriptor] = [            ProviderSettingsFieldDescriptor(                id: "stepfun-username",                title: "Username",                subtitle: "StepFun platform account (phone number or email).",                kind: .plain,                placeholder: "user@example.com",                binding: context.stringBinding(\.stepfunUsername),                actions: [],                isVisible: { context.settings.stepfunCookieSource != .manual },                onActivate: nil),            ProviderSettingsFieldDescriptor(                id: "stepfun-password",                title: "Password",                subtitle: "Your StepFun platform password. Used to login and obtain a session token.",                kind: .secure,                placeholder: "Password",                binding: context.stringBinding(\.stepfunPassword),                actions: [],                isVisible: { context.settings.stepfunCookieSource != .manual },                onActivate: nil),        ]         // Manual mode: show token field        let manualFields: [ProviderSettingsFieldDescriptor] = [            ProviderSettingsFieldDescriptor(                id: "stepfun-token",                title: "Oasis-Token",                subtitle: "Paste the Oasis-Token from a logged-in browser session on platform.stepfun.com.",                kind: .secure,                placeholder: "Oasis-Token=…",                binding: context.stringBinding(\.stepfunToken),                actions: [                    ProviderSettingsActionDescriptor(                        id: "stepfun-open-platform",                        title: "Open StepFun Platform",                        style: .link,                        isVisible: nil,                        perform: {                            if let url = URL(string: "https://platform.stepfun.com/plan-usage") {                                NSWorkspace.shared.open(url)                            }                        }),                ],                isVisible: { context.settings.stepfunCookieSource == .manual },                onActivate: nil),        ]         return autoFields + manualFields    }}