using System.Diagnostics.CodeAnalysis;
using System.Text.Json;
using InnovEnergy.App.SinexcelCommunication.DataTypes;
using InnovEnergy.Lib.Devices.Sinexcel_12K_TL.DataType;
using InnovEnergy.Lib.Utils;
using static System.Text.Json.JsonSerializer;


namespace InnovEnergy.App.SinexcelCommunication.SystemConfig;

[SuppressMessage("Trimming", "IL2026:Members annotated with \'RequiresUnreferencedCodeAttribute\' require dynamic access otherwise can break functionality when trimming application code")]
public class Config
{
    private static String DefaultConfigFilePath => Path.Combine(Environment.CurrentDirectory, "config.json");
    private static DateTime DefaultDatetime => new(2025, 01, 01, 09, 00, 00); 
    
    private static readonly JsonSerializerOptions JsonOptions = new() { WriteIndented = true };

    public required DeviceConfig          Devices                                 { get; set; }
    //public required Boolean               DynamicPricingEnabled                   { get; set; }
    //public required DynamicPricingMode    DynamicPricingMode                      { get; set; }
    //public required Decimal               CheapPrice                              { get; set; }
    //public required Decimal               HighPrice                               { get; set; }
    public required Double                MinSoc                                  { get; set; }
    public required Double                GridSetPoint                            { get; set; } 
    public required Double                MaximumDischargingCurrent               { get; set; } 
    public required Double                MaximumChargingCurrent                  { get; set; } 
    public required OperatingPriority     OperatingPriority                       { get; set; } 
    public required Int16                 BatteriesCount                          { get; set; }
    public required Int16                 ClusterNumber                           { get; set; }
    public required Int16                 PvNumber                                { get; set; }
    public required Double                ModbusProtcolNumber                     { get; set; }
    public required DateTime              StartTimeChargeandDischargeDayandTime   { get; set; }
    public required DateTime              StopTimeChargeandDischargeDayandTime    { get; set; }

    public required Single                TimeChargeandDischargePower             { get; set; }
    public required Boolean               ControlPermission                       { get; set; } 


    public required S3Config?             S3                                      { get; set; }

    private static String? LastSavedData                                          { get; set; }
    private static DateTime? LoadedWriteTimeUtc                                    { get; set; }

    public static Config Default => new()
    {
        Devices = new ()
        {
            Serial                 = new() {BaudRate = 115200, Parity = 0, StopBits = 1, DataBits =  8},
            Inverter1              = new() {DeviceState = DeviceState.Measured, Port = "/dev/ttyUSB0", SlaveId = 1},
            Inverter2              = new() {DeviceState = DeviceState.Measured, Port = "/dev/ttyUSB1", SlaveId = 1},
            Inverter3              = new() {DeviceState = DeviceState.Measured, Port = "/dev/ttyUSB3", SlaveId = 1},
            Inverter4              = new() {DeviceState = DeviceState.Measured, Port = "/dev/ttyUSB4", SlaveId = 1},
        },
        //DynamicPricingEnabled                   = false,
        //DynamicPricingMode                      = DynamicPricingMode.Disabled,
        MinSoc                                  = 20,
        GridSetPoint                            = 0,
        MaximumChargingCurrent                  = 180,
        MaximumDischargingCurrent               = 180,  
        OperatingPriority                       = OperatingPriority.LoadPriority,
        BatteriesCount                          = 0,
        ClusterNumber                           = 0,
        PvNumber                                = 0,
        ModbusProtcolNumber                     = 1.2,
        StartTimeChargeandDischargeDayandTime   = DefaultDatetime,
        StopTimeChargeandDischargeDayandTime    = DefaultDatetime,
        TimeChargeandDischargePower             = 3,
        ControlPermission                       = false,

        S3 = new()
        {
            Bucket      = "1-3e5b3069-214a-43ee-8d85-57d72000c19d",
            Region      = "sos-ch-dk-2",
            Provider    = "exo.io",
            Key         = "EXObb5a49acb1061781761895e7",
            Secret      = "sKhln0w8ii3ezZ1SJFF33yeDo8NWR1V4w2H0D4-350I",
            ContentType = "text/plain; charset=utf-8"
        }
    };

    public void Save(String? path = null)
    {
        var configFilePath = path ?? DefaultConfigFilePath;
        
        var currentWriteTime = File.GetLastWriteTimeUtc(configFilePath);
        if (currentWriteTime != LoadedWriteTimeUtc)
            throw new IOException("Config file changed on disk since it was loaded; refusing to overwrite."); // to prevent an overwriting while an external changes happended in the meantime

        try
        {
            var jsonString = Serialize(this, JsonOptions);

            if (LastSavedData == jsonString)
                return;
            
            LastSavedData = jsonString;

            File.WriteAllText(configFilePath, jsonString);
        }
        catch (Exception e)
        {
            $"Failed to write config file {configFilePath}\n{e}".WriteLine();
            throw;
        }
    }
/*
    public static Config Load(String? path = null)
    {
        var configFilePath = path ?? DefaultConfigFilePath;
        try
        {
            var jsonString = File.ReadAllText(configFilePath);
           // LoadedWriteTimeUtc = File.GetLastWriteTimeUtc(configFilePath);

            return Deserialize<Config>(jsonString)!;
        }
        catch (Exception e)
        {
            $"Failed to read config file {configFilePath}, using default config\n{e}".WriteLine();
            return Default;
        }
    }*/

    public static Config Load(string? path = null)
    {
        var configFilePath = path ?? DefaultConfigFilePath; // ✅ handle null first

        try
        {
            // Now safe to call any File/Path API
            var json = File.ReadAllText(configFilePath);

            var cfg = Deserialize<Config>(json, JsonOptions)
                      ?? throw new InvalidOperationException("Config deserialized to null.");

            // Optional: store last write time / last saved json
            LoadedWriteTimeUtc = File.GetLastWriteTimeUtc(configFilePath);
            LastSavedData = Serialize(cfg, JsonOptions); // if you use the save-skip logic

            return cfg;
        }
        catch (Exception e)
        {
            $"Failed to read config file {configFilePath}\n{e}".WriteLine();
            throw;
        }
    }
    
    public static async Task<Config> LoadAsync(String? path = null)
    {
        var configFilePath = path ?? DefaultConfigFilePath;
        try
        {
            var jsonString = await File.ReadAllTextAsync(configFilePath);
            return Deserialize<Config>(jsonString)!;
        }
        catch (Exception e)
        {
            Console.WriteLine($"Couldn't read config file {configFilePath}, using default config");
            e.Message.WriteLine();
            return Default;
        }
    }
}