import AppKit
import Common

struct ListMonitorsCommand: Command {
    let args: ListMonitorsCmdArgs
    /*conforms*/ let shouldResetClosedWindowsCache = false

    func run(_ env: CmdEnv, _ io: CmdIo) -> BinaryExitCode {
        let focus = focus
        var result = sortedMonitorInfos
        if let focused = args.focused {
            result = result.filter { (monitor) in (monitor.activeWorkspace == focus.workspace) == focused }
        }
        if let mouse = args.mouse {
            let mouseWorkspace = mouseLocation.monitorApproximation.activeWorkspace
            result = result.filter { (monitor) in (monitor.activeWorkspace == mouseWorkspace) == mouse }
        }

        lazy var list = result.map(AeroObj.monitor)
        return switch true {
            case args.outputOnlyCount:
                .succ(io.out("\(result.count)"))
            case args.json:
                switch list.formatToJson(args.format, ignoreRightPaddingVar: args._format.isEmpty) {
                    case .success(let json): .succ(io.out(json))
                    case .failure(let msg): .fail(io.err(msg))
                }
            default:
                switch list.format(args.format) {
                    case .success(let lines): .succ(io.out(lines))
                    case .failure(let msg): .fail(io.err(msg.map(\.description).joinErrors()))
                }
        }
    }
}