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

import Foundation

/// Reads profiles straight from the homeserver's profile endpoint, which — unlike the
/// Rust SDK's `getProfile` — includes the extended profile fields (MSC4133).
final class ExtendedProfileService: ExtendedProfileServiceProtocol {
    private let clientProxy: ClientProxyProtocol
    private let urlSession: URLSession
    
    init(clientProxy: ClientProxyProtocol, urlSession: URLSession = .shared) {
        self.clientProxy = clientProxy
        self.urlSession = urlSession
    }
    
    func profile(for userID: String) async -> Result<ExtendedProfile, ExtendedProfileServiceError> {
        guard case let .success(credentials) = clientProxy.homeserverCredentials() else {
            return .failure(.missingCredentials)
        }
        
        let url = credentials.homeserverURL.appending(path: "_matrix/client/v3/profile/\(userID)")
        var request = URLRequest(url: url)
        request.setValue("Bearer \(credentials.accessToken)", forHTTPHeaderField: "Authorization")
        
        let data: Data
        do {
            let (responseData, response) = try await urlSession.data(for: request)
            
            guard let httpResponse = response as? HTTPURLResponse else {
                return .failure(.networkFailure)
            }
            guard httpResponse.statusCode == 200 else {
                MXLog.error("Failed fetching the extended profile for \(userID) with status: \(httpResponse.statusCode)")
                return .failure(.httpStatus(httpResponse.statusCode))
            }
            
            data = responseData
        } catch {
            MXLog.error("Failed fetching the extended profile for \(userID) with error: \(error)")
            return .failure(.networkFailure)
        }
        
        do {
            return try .success(JSONDecoder().decode(ExtendedProfile.self, from: data))
        } catch {
            MXLog.error("Failed decoding the extended profile for \(userID) with error: \(error)")
            return .failure(.decodingFailure)
        }
    }
}