//
// Copyright 2026 Novaloop AG
//
// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
// Please see LICENSE files in the repository root for full details.
//

import Foundation

/// Pins HealthChat's server, OIDC and push configuration by overriding `AppSettings` at startup.
///
/// - `accountProviders` / `allowOtherAccountProviders` lock every user to `healthchat.ch` (the server name;
///   `.well-known` delegates to `matrix.healthchat.ch`) and hide the change-server / create-account UI.
/// - `oAuthRedirectURL` uses the app's own URL scheme so the OIDC/MAS callback needs no associated domain.
/// - Legal links point at healthchat.ch. The encryption/verification/backup help links still go to
///   Element's help pages because no HealthChat equivalents exist yet.
struct HealthChatAppSettingsHook: AppSettingsHookProtocol {
    func configure(_ appSettings: AppSettings) -> AppSettings {
        appSettings.override(accountProviders: [.generic("healthchat.ch")],
                             allowOtherAccountProviders: false,
                             hideBrandChrome: false,
                             pushGatewayBaseURL: "https://sygnal.healthchat.ch",
                             oAuthRedirectURL: "ch.healthchat.element:/oauth/callback",
                             // nil keeps the registered client_uri at the bare website URL, as shipped before upstream's `apps/ios` default.
                             oAuthClientURIPath: nil,
                             websiteURL: "https://healthchat.ch",
                             logoURL: "https://app.healthchat.ch/themes/element/img/logos/element-logo.png",
                             copyrightURL: "https://www.healthchat.ch/impressum",
                             acceptableUseURL: "https://www.healthchat.ch/datenschutz",
                             privacyURL: "https://www.healthchat.ch/datenschutz",
                             encryptionURL: nil,
                             deviceVerificationURL: nil,
                             chatBackupDetailsURL: nil,
                             identityPinningViolationDetailsURL: nil,
                             historySharingDetailsURL: nil,
                             elementWebHosts: ["app.healthchat.ch"],
                             accountProvisioningHost: appSettings.accountProvisioningHost,
                             bugReportApplicationID: "healthchat-ios",
                             analyticsTermsURL: "https://www.healthchat.ch/datenschutz",
                             mapTilerConfiguration: Self.mapTilerConfiguration)
        return appSettings
    }
    
    /// No MapTiler account yet: a nil key hides location sharing and shows received locations as a placeholder.
    private static let mapTilerConfiguration = MapTilerConfiguration(baseURL: AppSettings.bundledMapTilerConfiguration.baseURL,
                                                                     apiKey: nil,
                                                                     lightStyleID: AppSettings.bundledMapTilerConfiguration.lightStyleID,
                                                                     darkStyleID: AppSettings.bundledMapTilerConfiguration.darkStyleID)
}