using Newtonsoft.Json;
using System.Net.Http.Headers;

namespace AiQ_GUI
{
    public enum LEDPOWER
    {
        LOW,
        MID,
        HIGH,
        SAFE,
        OFF
    }

    public class FlexiAPI
    {
        // GET API from camera
        public static async Task<string> APIHTTPRequest(string EndPoint, string IPAddress, int? Timeout = 2)
        {
            try
            {
                string URL = $"http://{IPAddress}{EndPoint}";
                return await Network.SendHttpRequest(URL, HttpMethod.Get, Timeout);
            }
            catch (Exception ex)
            {
                return $"Error during GET request: {ex.Message}";
            }
        }

        // For 'update-config' sending a change to the AiQ
        // TODO - Not many of the references check the output is positive. Need them all to check.
        public static async Task<string> HTTP_Update(string ID, string IPAddress, string[,] jsonArrayData)
        {
            try
            {
                string JSONdata = BuildJsonUpdate(jsonArrayData, ID);
                string url = $"http://{IPAddress}/api/update-config";
                return await Network.SendHttpRequest(url, HttpMethod.Post, 2, JSONdata);
            }
            catch (Exception ex)
            {
                return $"Error in HTTP_Update: {ex.Message}";
            }
        }

        // For 'fetch-config' getting info from AiQ
        public static async Task<string> HTTP_Fetch(string ID, string IPAddress, int? Timeout = 2)
        {
            try
            {
                string JSONdata = "{ \"id\":\"" + ID + "\" }";
                string url = $"http://{IPAddress}/api/fetch-config";
                return await Network.SendHttpRequest(url, HttpMethod.Get, Timeout, JSONdata);
            }
            catch (Exception ex)
            {
                return $"Error in HTTP_Fetch: {ex.Message}";
            }
        }

        // For sending VISCA directly to the camera module
        // Be aware this does bypass Flexi's watchdog so settings like zoom, focus, SIG wont keep forever
        public static async Task<string> APIHTTPVISCA(string IPAddress, string VISCA, bool IR)
        {
            string suffix = $"-camera-control?commandHex={VISCA}";

            if (IR) // Add on which camera to control
                suffix = "/Infrared" + suffix;
            else
                suffix = "/Colour" + suffix;

            return await APIHTTPRequest(suffix, IPAddress);
        }

        // Sets the LED level into the camera
        public static async Task<string> APIHTTPLED(string IPAddress, LEDPOWER LEVEL)
        {
            // Always Infrared as LED's are controlled from infrared page
            // Level can be word eg. SAFE or hex eg. 0x0E
            string suffix = $"/Infrared/led-controls?power={LEVEL}";
            return await APIHTTPRequest(suffix, IPAddress);
        }

        public static async Task<string> SendBlobFileUpload(string url, string filePath, string fileName)
        {
            try
            {
                Network.Client.DefaultRequestHeaders.ExpectContinue = false;
                MultipartFormDataContent content;

                byte[] fileBytes = await File.ReadAllBytesAsync(filePath).ConfigureAwait(false);
                MemoryStream ms = new(fileBytes);
                StreamContent streamContent = new(ms);
                streamContent.Headers.ContentType = new MediaTypeHeaderValue("application/octet-stream");

                content = new MultipartFormDataContent { { streamContent, "upload", fileName } };

                using HttpResponseMessage response = await Network.Client.PostAsync(url, content);
                string responseBody = await response.Content.ReadAsStringAsync();

                if (!response.IsSuccessStatusCode)
                    return $"Server returned {(int)response.StatusCode}: {response.ReasonPhrase}. Details: {responseBody}";

                return responseBody;
            }
            catch (TaskCanceledException)
            {
                return $"Timeout uploading to {url}.";
            }
            catch (HttpRequestException ex)
            {
                return $"HTTP error uploading to {url}: {ex.Message}";
            }
            catch (Exception ex)
            {
                return $"Unexpected error uploading to {url}: {ex.Message} {(ex.InnerException?.Message ?? "")}";
            }
        }

        public static async Task<Versions> GetVersions(string IPAddress)
        {
            string JSON = await APIHTTPRequest("/api/versions", IPAddress); // Version API request

            if (JSON == null || JSON.Contains("Error") || JSON.Contains("Timeout"))
                return null;

            Logging.LogMessage("Received versions JSON: " + JSON);

            try
            {
                return JsonConvert.DeserializeObject<Versions>(JSON);
            }
            catch
            {
                MainForm.Instance.AddToActionsList("Cannot deserialise Versions JSON" + Environment.NewLine + JSON);
                return null; // If it fails to parse the JSON
            }
        }

        public static async Task<Diags> GetDiagnostics(string IPAddress)
        {
            string JSON = await APIHTTPRequest("/api/diagnostics", IPAddress, 20); // Version API request

            if (JSON == null || JSON.Contains("Error") || JSON.Contains("Timeout"))
            {
                MainForm.Instance.AddToActionsList("Error talking to Flexi, are you sure this is an AiQ?" + Environment.NewLine + JSON);
                return null;
            }

            Logging.LogMessage("Received diagnostics JSON: " + JSON);

            try
            {
                return JsonConvert.DeserializeObject<Diags>(JSON);
            }
            catch
            {
                MainForm.Instance.AddToActionsList("Cannot deserialise Diagnostics JSON" + Environment.NewLine + JSON);
                return null; // If it fails to parse the JSON
            }
        }

        public static async Task<bool> SetZoomLockOn(string IP)
        {
            // Set Zoomlock on and if it fails ask user to set it manually
            if (!(await APIHTTPRequest("/api/zoomLock?enable=true", IP)).Contains("Zoom lock enabled.")
                && !await MainForm.Instance.DisplayQuestion("Could not set zoomlock on" + Environment.NewLine + "Set Zoomlock to on then click YES. Click NO to restart."))
            {
                return false;
            }

            return true;
        }

        public static async Task<bool> ZoomModules(string VISCAInput, string IPAddress)
        {
            // Populate the VISCA command with the four zoom characters
            string VISCA = $"810104470{VISCAInput[0]}0{VISCAInput[1]}0{VISCAInput[2]}0{VISCAInput[3]}FF";

            Task<string> TS1 = APIHTTPVISCA(IPAddress, VISCA, true);
            Task<string> TS2 = APIHTTPVISCA(IPAddress, VISCA, false);
            await Task.WhenAll(TS1, TS2);

            const string ExpReply = "9041FF9051FF";
            if (TS1.Result == ExpReply && TS1.Result == ExpReply)
                return true;

            return false;
        }

        // Processes the network config from the camera and returns a string indicating the status
        public static async Task<string> ProcessNetworkConfig(string IPAddress)
        {
            try
            {
                string JSON = await HTTP_Fetch("GLOBAL--NetworkConfig", IPAddress, 10);
                NetworkConfig NC = JsonConvert.DeserializeObject<NetworkConfig>(JSON);

                if (Convert.ToBoolean(NC.propDHCP.Value) == false)
                    return "Set to DHCP";
                else
                    return "Set to 211";
            }
            catch (Exception ex)
            {
                MainForm.Instance.AddToActionsList($"Error in getting network config from camera: {ex.Message}");
                return null; // Return empty string if there is an error
            }
        }

        // Knowing the format this builds the message to send to AiQ
        private static string BuildJsonUpdate(string[,] jsonData, string id)
        {
            if (jsonData == null || jsonData.GetLength(1) != 2)
                throw new ArgumentException("Input data must be a non-null 2D array with two columns.");

            int rows = jsonData.GetLength(0);
            List<object> fields = [];

            for (int i = 0; i < rows; i++) // Puts each part of the array into correct format
            {
                fields.Add(new
                {
                    property = jsonData[i, 0],
                    value = jsonData[i, 1]
                });
            }

            var updateObject = new // Correct naming and format so it is JSON ready
            {
                id,
                fields
            };

            return JsonConvert.SerializeObject(updateObject, Formatting.None); // Uses no white space
        }

        // Change network settings to 192.168.1.211 and wait 5 seconds to see if it takes effect
        public static async Task<bool> ChangeNetwork211(string IPAddress)
        {
            // Update GLOBAL--NetworkConfig with fixed IP and turn off DHCP
            string[,] TEST_JSON = { { "propDHCP", "false" }, { "propHost", "192.168.1.211" }, { "propNetmask", "255.255.255.0" }, { "propGateway", "192.168.1.1" } };
            await HTTP_Update("GLOBAL--NetworkConfig", IPAddress, TEST_JSON);

            await Task.Delay(5000); // Wait for 5 seconds to allow the camera to restart
            IList<string> FoundCams = await Network.SearchForCams(); // Have to check via broadcast becuase Ping sometimes fails across subnets

            return FoundCams.Contains("192.168.1.211");
        }

        // Change network settings to DHCP and restart camera for it to take effect
        public async static Task ChangeNetworkToDHCP(string IPAddress)
        {
            string[,] TEST_JSON = { { "propDHCP", "true" } }; // Update GLOBAL--NetworkConfig with fixed IP and turn off DHCP
            await HTTP_Update("GLOBAL--NetworkConfig", IPAddress, TEST_JSON);
            // TODO - Check if this worked, if not return false
        }
    }

    //Items recieved in Versions API
    public class Versions
    {
        public string version { get; set; } = string.Empty;
        public string revision { get; set; } = string.Empty;
        public string buildtime { get; set; } = string.Empty;
        public string appname { get; set; } = string.Empty;
        public string MAC { get; set; } = string.Empty;
        public int timeStamp { get; set; }
        public string UUID { get; set; } = string.Empty;
        public string proquint { get; set; } = string.Empty;

        [JsonProperty("Serial No.")]
        public string Serial { get; set; } = string.Empty;

        [JsonProperty("Model No.")]
        public string Model { get; set; } = string.Empty;
    }

    // Items returned in the diagnostics api
    public class Diags
    {
        [JsonProperty("version")]
        public string FlexiVersion { get; set; } = string.Empty;

        [JsonProperty("revision")]
        public string FlexiRevision { get; set; } = string.Empty;
        public string serialNumber { get; set; } = string.Empty;
        public string modelNumber { get; set; } = string.Empty;
        public string MAC { get; set; } = string.Empty;
        public long timeStamp { get; set; }
        public Licenses licenses { get; set; } = new Licenses();

        [JsonProperty("internalTemperature")]
        public double IntTemperature { get; set; }

        [JsonProperty("cpuUsage")]
        public double CPUusage { get; set; }
        public List<int> trim { get; set; } = [];
        public bool zoomLock { get; set; }
        public Module IRmodule { get; set; } = new Module();
        public Module OVmodule { get; set; } = new Module();

        [JsonProperty("ledChannelVoltages")]
        public List<double> LedVoltage { get; set; } = [];

        [JsonProperty("ledChannelCurrents")]
        public List<double> LedCurrent { get; set; } = [];
    }

    public class Module
    {
        public int zoom { get; set; }
        public int expMode { get; set; }
        public string firmwareVer { get; set; } = string.Empty;
    }

    public class Trim
    {
        public int infraredX { get; set; }
        public int infraredY { get; set; }
        public int colourX { get; set; }
        public int colourY { get; set; }
    }

    public class NetworkConfig
    {
        public Property propDHCP { get; set; } = new Property();
    }

    public class Property
    {
        public string Value { get; set; } = string.Empty;
    }
}