import Foundation

@MainActor
enum CLIInstaller {
    static func installedLocation() -> String? {
        self.installedLocation(
            searchPaths: CommandResolver.preferredPaths(),
            fileManager: .default)
    }

    static func installedLocation(
        searchPaths: [String],
        fileManager: FileManager) -> String?
    {
        for basePath in searchPaths {
            let candidate = URL(fileURLWithPath: basePath).appendingPathComponent("clawdbot").path
            var isDirectory: ObjCBool = false

            guard fileManager.fileExists(atPath: candidate, isDirectory: &isDirectory),
                  !isDirectory.boolValue
            else {
                continue
            }

            guard fileManager.isExecutableFile(atPath: candidate) else { continue }

            return candidate
        }

        return nil
    }

    static func isInstalled() -> Bool {
        self.installedLocation() != nil
    }

    static func install(statusHandler: @escaping @Sendable (String) async -> Void) async {
        let expected = GatewayEnvironment.expectedGatewayVersion()
        await GatewayEnvironment.installGlobal(version: expected) { message in
            Task { @MainActor in await statusHandler(message) }
        }
    }
}