using Google.Protobuf;
using Microsoft.Extensions.Options;
using WebmrAPI.Configuration;
using WebmrAPI.Utils;
using WebmrAPI.Utils.Sequences;
using WinIPC.Models;
using WinIPC.Services;
using WinIPC.Utils;

namespace WebmrAPI.Services
{
    public sealed class IPCClientService : IPCBaseClientService
    {
        public IPCClientService(ILogger<IPCClientService> logger, IOptions<AppSettings> appConfigOptions)
            : base(logger, appConfigOptions?.Value?.IPCServiceOptions.BasePipeName ?? throw new ArgumentNullException(nameof(appConfigOptions)))
        { }

        public async Task<IEnumerable<WindowInfo>> GetWindowInfos(int sessionId, IEnumerable<IntPtr>? hwnds = null)
        {
            var req = new WindowsRequest();

            if (hwnds != null)
            {
                foreach (var hwnd in hwnds)
                {
                    req.Hwnds.Add((int)hwnd);
                }
            }

            var resp = await SendRequest(sessionId, CommandType.GetWindowsInfo, req).GetResponseAsync();

            if (resp != null && resp.Success)
            {
                return PayloadHandler.ExtractPayload<WindowsResponse>(resp).Data;
            }

            // TODO log Error

            return new List<WindowInfo>();
        }

        public async Task<byte[]> GetScreenshot(int sessionId, IntPtr hwnd = 0, int x = 0, int y = 0, int width = 0, int height = 0)
        {
            var req = new ScreenshotRequest()
            {
                Hwnd = (int)hwnd,
                CropPosition = new() { X = x, Y = y },
                CropSize = new() { Width = width, Height = height }
            };

            var resp = await SendRequest(sessionId, CommandType.GetScreenshot, req).GetResponseAsync();

            if (resp != null && resp.Success)
            {
                return PayloadHandler.ExtractPayload<ScreenshotResponse>(resp).Data.ToByteArray();
            }

            // TODO log Error

            return Array.Empty<byte>();
        }

        public async Task<int> GetPixelColor(int sessionId, IntPtr hwnd = 0, int x = 0, int y = 0)
        {
            var req = new PixelRequest()
            {
                Hwnd = (int)hwnd,
                PixelPosition = new() { X = x, Y = y }
            };

            var resp = await SendRequest(sessionId, CommandType.GetPixelColor, req).GetResponseAsync();

            if (resp != null && resp.Success)
            {
                return (int)PayloadHandler.ExtractPayload<PixelResponse>(resp).RgbColor;
            }

            // TODO log Error

            return -1;
        }

        private IEnumerable<InputAction> GetMouseMovingPath(ISequenceGenerator<Point> pGen, DelayGenerator dGen, ref int nActions)
        {
            List<InputAction> actions = new();

            foreach (var p in pGen)
            {
                var input = new MouseMoveInput() { Position = new() { X = p.X, Y = p.Y } };

                actions.Add(new InputAction()
                {
                    Type = InputType.MouseMoveTo,
                    DelayMs = (uint)dGen.Next().Value,
                    Payload = ByteString.CopyFrom(PayloadHandler.Serialize(input))
                });
                ++nActions;
            }

            return actions;
        }

        private IEnumerable<InputAction> GetMouseScrollSequence(ScrollAmountGenerator sGen, DelayGenerator dGen, ref int nActions)
        {
            List<InputAction> actions = new();

            foreach (var s in sGen)
            {
                var input = new ScrollInput() { Offset = s };

                actions.Add(new InputAction()
                {
                    Type = InputType.MouseScroll,
                    DelayMs = (uint)dGen.Next().Value,
                    Payload = ByteString.CopyFrom(PayloadHandler.Serialize(input))
                });
                ++nActions;
            }

            return actions;
        }

        private async Task<int> SendInputActions(int sessionId, IntPtr hwnd, IEnumerable<InputAction> actions, int nActions)
        {
            var resp = await SendRequest(sessionId, CommandType.InputAction, new InputRequest() { Hwnd = (int)hwnd, Actions = { actions } }).GetResponseAsync();

            if (resp != null && resp.Success)
            {
                return nActions - PayloadHandler.ExtractPayload<InputResponse>(resp).Count;
            }

            // TODO log Error

            return -nActions;
        }

        public Task<int> MouseMove(int sessionId, ISequenceGenerator<Point> pGen, DelayGenerator dGen, IntPtr hwnd = 0)
        {
            int nActions = 0;
            return SendInputActions(sessionId, hwnd, GetMouseMovingPath(pGen, dGen, ref nActions), nActions);
        }

        public Task<int> HoldDownAndMouseMove(int sessionId, ISequenceGenerator<Point> pGen, DelayGenerator dGen, Key key, IntPtr hwnd = 0)
        {
            return HoldDownAndMouseMove(sessionId, pGen, dGen, new KeyShortcut(key), hwnd);
        }

        public Task<int> HoldDownAndMouseMove(int sessionId, ISequenceGenerator<Point> pGen, DelayGenerator dGen, KeyShortcut sc, IntPtr hwnd = 0)
        {
            IEnumerable<InputAction> holdDown = sc.GetHoldDownActions(), holdUp = sc.GetHoldUpActions();
            int nActions = holdDown.Count() + holdUp.Count();

            return SendInputActions(sessionId, hwnd, holdDown.Concat(GetMouseMovingPath(pGen, dGen, ref nActions)).Concat(holdUp), nActions);
        }

        public Task<int> MouseMoveAndPress(int sessionId, ISequenceGenerator<Point> pGen, DelayGenerator dGen, Key key, IntPtr hwnd = 0)
        {
            return MouseMoveAndPress(sessionId, pGen, dGen, new KeyShortcut(key), hwnd);
        }

        public Task<int> MouseMoveAndPress(int sessionId, ISequenceGenerator<Point> pGen, DelayGenerator dGen, KeyShortcut sc, IntPtr hwnd = 0)
        {
            return MouseMoveAndPress(sessionId, pGen, dGen, new KeyShortcutSequence(sc), hwnd);
        }

        public Task<int> MouseMoveAndPress(int sessionId, ISequenceGenerator<Point> pGen, DelayGenerator dGen, KeyShortcutSequence seq, IntPtr hwnd = 0)
        {
            IEnumerable<InputAction> press = seq.GetInputActions();
            int nActions = press.Count();

            return SendInputActions(sessionId, hwnd, GetMouseMovingPath(pGen, dGen, ref nActions).Concat(press), nActions);
        }

        public Task<int> MouseScroll(int sessionId, ScrollAmountGenerator sGen, DelayGenerator dGen, IntPtr hwnd = 0)
        {
            int nActions = 0;
            return SendInputActions(sessionId, hwnd, GetMouseScrollSequence(sGen, dGen, ref nActions), nActions);
        }

        public Task<int> HoldDownAndMouseScroll(int sessionId, ScrollAmountGenerator sGen, DelayGenerator dGen, Key key, IntPtr hwnd = 0)
        {
            return HoldDownAndMouseScroll(sessionId, sGen, dGen, new KeyShortcut(key), hwnd);
        }

        public Task<int> HoldDownAndMouseScroll(int sessionId, ScrollAmountGenerator sGen, DelayGenerator dGen, KeyShortcut sc, IntPtr hwnd = 0)
        {
            IEnumerable<InputAction> holdDown = sc.GetHoldDownActions(), holdUp = sc.GetHoldUpActions();
            int nActions = holdDown.Count() + holdUp.Count();

            return SendInputActions(sessionId, hwnd, holdDown.Concat(GetMouseScrollSequence(sGen, dGen, ref nActions)).Concat(holdUp), nActions);
        }

        public Task<int> HoldDown(int sessionId, Key key, IntPtr hwnd = 0)
        {
            return HoldDown(sessionId, new KeyShortcut(key), hwnd);
        }

        public Task<int> HoldUp(int sessionId, Key key, IntPtr hwnd = 0)
        {
            return HoldUp(sessionId, new KeyShortcut(key), hwnd);
        }

        public Task<int> HoldDown(int sessionId, KeyShortcut sc, IntPtr hwnd = 0)
        {
            IEnumerable<InputAction> holdDown = sc.GetHoldDownActions();
            return SendInputActions(sessionId, hwnd, holdDown, holdDown.Count());
        }

        public Task<int> HoldUp(int sessionId, KeyShortcut sc, IntPtr hwnd = 0)
        {
            IEnumerable<InputAction> holdUp = sc.GetHoldUpActions();
            return SendInputActions(sessionId, hwnd, holdUp, holdUp.Count());
        }

        public Task<int> Press(int sessionId, Key key, IntPtr hwnd = 0)
        {
            return Press(sessionId, new KeyShortcut(key), hwnd);
        }

        public Task<int> Press(int sessionId, KeyShortcut sc, IntPtr hwnd = 0)
        {
            return Press(sessionId, new KeyShortcutSequence(sc), hwnd);
        }

        public Task<int> Press(int sessionId, KeyShortcutSequence seq, IntPtr hwnd = 0)
        {
            IEnumerable<InputAction> press = seq.GetInputActions();
            return SendInputActions(sessionId, hwnd, press, press.Count());
        }
    }
}