//
//  HIDExample_CoreHID.swift
//  HIDExample_CoreHID
//
//  Modified by Kevin Elliott on 3/7/25.

import Foundation
import CoreHID

let DeviceVendorId: UInt32 = 0x046D // Logitech
//let DeviceProductId: UInt32 = 0xC24A // Gaming Mouse G600
let DeviceProductId: UInt32 = 0xC08B // Gaming Mouse G502

var deviceClient: HIDDeviceClient? = nil

@main struct HIDExample_CoreHID {

    static func main() async throws {
            let deviceManager = HIDDeviceManager()
            let matchingCriteria : HIDDeviceManager.DeviceMatchingCriteria = .init(primaryUsage: HIDUsage(page: 0x01, usage: 0x06) , deviceUsages: nil, vendorID: DeviceVendorId, productID: DeviceProductId)
            let reportId = HIDReportID(rawValue: 0x80)
            
            var deviceRef: HIDDeviceClient.DeviceReference? = nil
            
            for try await notification in await deviceManager.monitorNotifications(matchingCriteria: [matchingCriteria]) {
                switch notification {
                case .deviceMatched(let dr):
                    if deviceRef != nil {continue}
                    deviceRef = dr
                    deviceClient = HIDDeviceClient(deviceReference: deviceRef!)
                    let deviceName = await deviceClient!.product!
                    print("DeviceName: \(deviceName)")
                    

                    #if true
                    let allElements = await deviceClient?.elements
                    let count = allElements!.count
                    print ("Report \(count) <\(String(describing: allElements))>")
                    #endif
                    
                    let elemToMon = await deviceClient?.elements.filter({ ele in
                        return  ele.usage.page == 7 && ele.usage.usage == 225
                    })
                    assert(!(elemToMon!.isEmpty)) // make sure that this is the correct device.
                    
                    do {
                        let report = try await deviceClient!.dispatchGetReportRequest(type: .input, id: HIDReportID(rawValue: 1), timeout: Duration.seconds(4))
                        assert(!report.isEmpty)
                        NSLog("dispatchGetReportRequest succeeded: %@\n", String(describing: report))
                    }
                    catch {
                        NSLog("dispatchGetReportRequest failed: %@\n", String(describing: error))
                    }
                                        
                    do {
                        let request = HIDDeviceClient.RequestElementUpdate(elements: elemToMon!)
                        let results = await deviceClient!.updateElements([request])
                        let rval = try results[request]?.get() // <-----  error is thrown here
                        print ("Report \(String(describing: rval))")
                    }
                    catch {
                        NSLog("RequestElementUpdate failed: %@\n", String(describing: error))
                    }

                default:
                    continue
                    
                }
            }
        print("Finished")
    }
}