import Foundation
import SaplingCore

public final class EmbeddedGitProvider: GitProvider {
    public let displayName = "Embedded Git"

    public init() {}

    public func initRepository(at path: URL) async throws -> GitRepository {
        throw GitProviderError.notImplemented("Embedded Git init is reserved for the future iOS provider.")
    }

    public func clone(remoteURL: URL, to destinationURL: URL) async throws -> GitRepository {
        throw GitProviderError.notImplemented("Embedded Git clone is reserved for the future iOS provider.")
    }

    public func repository(at path: URL) -> any Repository {
        EmbeddedRepository(rootURL: path)
    }
}

private struct EmbeddedRepository: Repository {
    let rootURL: URL

    func status() async throws -> [GitFileStatus] { throw unsupported() }
    func add(paths: [String]) async throws { throw unsupported() }
    func commit(message: String) async throws -> GitCommit { throw unsupported() }
    func push(remote: String?, branch: String?) async throws { throw unsupported() }
    func pull(remote: String?, branch: String?) async throws { throw unsupported() }
    func createBranch(named name: String) async throws -> GitBranch { throw unsupported() }
    func switchBranch(named name: String) async throws -> GitBranch { throw unsupported() }
    func merge(branch name: String) async throws { throw unsupported() }
    func addSubmodule(remoteURL: URL, path: String) async throws -> Subproject { throw unsupported() }
    func removeSubmodule(path: String) async throws { throw unsupported() }
    func updateSubmodules(initSubmodules: Bool, recursive: Bool) async throws { throw unsupported() }
    func syncSubmodules(recursive: Bool) async throws { throw unsupported() }

    private func unsupported() -> GitProviderError {
        .notImplemented("Embedded Git repository operations are intentionally stubbed for iOS.")
    }
}