using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace BirdyFlash.Lib {
    public class DeviceFinder {
        public delegate void OnPortDataUpdated(object sender, EventArgs e);
        public event OnPortDataUpdated PortDataUpdated;

        public List<string> registeredPorts;
        Dictionary<string, CommPortInfo> enabledPorts;

        public DeviceFinder() {
            this.registeredPorts = new List<string>();
            this.enabledPorts = new Dictionary<string, CommPortInfo>();
            //
            string[] portsToReRegister = Properties.Settings.Default.registeredPorts.Split('\n');
            foreach (string registerPort in portsToReRegister)
                if (registerPort.Contains("://"))
                    this.RegisterNewPort(registerPort);

            string[] enabledPortsLoaded = Properties.Settings.Default.enabledPorts.Split('\n');
            List<string> ports = System.IO.Ports.SerialPort.GetPortNames().ToList().Select(s => s.ToLower()).ToList();
            foreach (string enablePort in enabledPortsLoaded)
                if (enablePort.Contains("://") && !(enablePort.StartsWith("serial://") && ports.IndexOf(new Uri(enablePort).Host) == -1))
                    this.EnablePort(enablePort);

            /*foreach (string enablePort in enabledPortsLoaded)
                if (enablePort.Contains("://"))
                    Console.WriteLine("{0} {1} {2}", enablePort, enablePort.StartsWith("serial://"), ports.IndexOf(new Uri(enablePort).Host));*/
        }

        private static DeviceFinder _instance;
        public static DeviceFinder instance {
            get {
                if (_instance == null)
                    _instance = new DeviceFinder();
                return _instance;
            }
        }
        public void ScanPagers() {
            Task.WaitAll(
                this.enabledPorts.Keys.ToList()
                .Select(portName => {
                    return Task.Run(() => TryDetectPager(portName));
                })
                .ToArray()
            );
            this.PortDataUpdated(this, new EventArgs());
        }
        public List<CommPortInfo> GetAvailablePagers() {
            /*foreach(var commPortInfo in this.ports.Values)
                Console.WriteLine("{0} {1} {2} {3} {4}", commPortInfo.port.ToString(), commPortInfo.unkown, commPortInfo.success, commPortInfo.deviceInfo.model, commPortInfo.deviceInfo.deviceSerial);*/
            return this.enabledPorts.Values.ToList().Where(x => x.success).ToList();
        }
        private async Task<bool> TryDetectPager(string portName) {
            if (!this.enabledPorts.ContainsKey(portName))
                return false;
            CommPortInfo commPortInfo = this.enabledPorts[portName];
            commPortInfo.success = false;
            commPortInfo.unkown = true;
            this.enabledPorts[portName] = commPortInfo;
            //
            using (var comm = new BirdyComm()) {
                comm.SetPort(commPortInfo.port);
                //if (comm.commPort is CommPortSerial) ((CommPortSerial)comm.commPort).ResetReOpen();
                DeviceInfo deviceInfo;
                try {
                    deviceInfo = await comm.TryGetDeviceInfo();
                } catch (TimeoutException te) {
                    Console.WriteLine(te.Message);
                    try {
                        deviceInfo = await comm.TryGetDeviceInfo();
                    } catch (TimeoutException te2) {
                        Console.WriteLine(te2.Message);
                        try {
                            deviceInfo = await comm.TryGetDeviceInfo();
                        } catch (TimeoutException te3) {
                            Console.WriteLine(te3.Message);
                            await comm.ForceGotoProg();
                            try {
                                deviceInfo = await comm.TryGetDeviceInfo();
                            } catch (TimeoutException te4) {
                                Console.WriteLine(te4.Message);
                                try {
                                    deviceInfo = await comm.TryGetDeviceInfo();
                                } catch (TimeoutException te5) {
                                    return false;
                                }
                            }
                        }
                    }
                }
                if (deviceInfo.deviceSerial != null) {
                    var data = await comm.TryGetDeviceInfo();
                    Console.WriteLine(deviceInfo.deviceSerial);
                    /*this.Invoke(new Action(() => {
                        txtLog.AppendText(string.Format("{0} type {1} serial {2}\n", portName, data.model, data.deviceSerial));
                    }));*/
                    commPortInfo.deviceInfo = deviceInfo;
                    commPortInfo.success = true;
                    commPortInfo.unkown = false;
                    this.enabledPorts[portName] = commPortInfo;
                    return true;
                } else {
                    /*this.Invoke(new Action(() => {
                        txtLog.AppendText(string.Format("{0} timeout\n", portName));
                    }));*/
                    commPortInfo.success = false;
                    commPortInfo.unkown = false;
                    this.enabledPorts[portName] = commPortInfo;
                    return false;
                }
            }
            return false;
        }

        internal void SetPortOption(string port, string option) {
            var portURI = new Uri(port);
            string strippedURI = portURI.Scheme + "://" + portURI.Host + "/";
            if (this.enabledPorts.ContainsKey(port))
                this.enabledPorts.Remove(port);
            Properties.Settings.Default.enabledPorts = string.Join("\n", this.enabledPorts.Keys);
            Properties.Settings.Default.Save();
            if (this.PortDataUpdated != null) this.PortDataUpdated(this, new EventArgs());
        }

        public void RescanLocalSerialPorts() {
            List<string> ports = System.IO.Ports.SerialPort.GetPortNames().ToList().Select(s => s.ToLower()).ToList();
            foreach (string portName in this.registeredPorts.ToList())
                if (new Uri(portName).Scheme == "serial" && ports.IndexOf(portName.Substring(9)) == -1) {
                    this.registeredPorts.Remove(portName);
                    if (this.enabledPorts.ContainsKey(portName))
                        this.enabledPorts.Remove(portName);
                }
            foreach (string portName in ports)
                if (this.registeredPorts.Where(x => x.StartsWith("serial://" + portName + "/")).Count() == 0)
                    this.registeredPorts.Add("serial://" + portName);
            if (this.PortDataUpdated != null) this.PortDataUpdated(this, new EventArgs());
        }

        public void RegisterNewPort(string port) {
            if (registeredPorts.Contains(port)) return;
            registeredPorts.Add(port);
            Properties.Settings.Default.registeredPorts = string.Join("\n", this.registeredPorts);
            Properties.Settings.Default.Save();
            if (this.PortDataUpdated != null) this.PortDataUpdated(this, new EventArgs());
        }
        public void EnablePort(string port) {
            if (!this.enabledPorts.ContainsKey(port))
                this.enabledPorts.Add(port, new CommPortInfo {
                    unkown = true,
                    port = CommPort.From(port),
                });
            Properties.Settings.Default.enabledPorts = string.Join("\n", this.enabledPorts.Keys);
            Properties.Settings.Default.Save();
            if (this.PortDataUpdated != null) this.PortDataUpdated(this, new EventArgs());
        }
        public void DisablePort(string port) {
            if (this.enabledPorts.ContainsKey(port))
                this.enabledPorts.Remove(port);
            Properties.Settings.Default.enabledPorts = string.Join("\n", this.enabledPorts.Keys);
            Properties.Settings.Default.Save();
            if (this.PortDataUpdated != null) this.PortDataUpdated(this, new EventArgs());
        }
        public bool IsPortEnabled(string port) {
            return this.enabledPorts.ContainsKey(port);
        }
    }
}