using System;
using System.Windows;
using CommunityToolkit.Mvvm.ComponentModel;
using CommunityToolkit.Mvvm.Input;
using Dione.Data;
using Dione.Models;
using Microsoft.Win32;

namespace Dione.ViewModels
{
    public class SettingsViewModel : ObservableObject
    {
        // ── API ──────────────────────────────────────────────────────────────────

        private string _selectedEndpointPreset = "Custom";
        public string SelectedEndpointPreset
        {
            get => _selectedEndpointPreset;
            set { if (SetProperty(ref _selectedEndpointPreset, value) && value != "Custom") ApplyPreset(value); }
        }
        public string[] EndpointPresets { get; } = { "Custom", "OpenAI", "Anthropic", "Google AI", "Azure OpenAI", "LM Studio (Local)", "Ollama (Local)" };

        private string _apiEndpoint = "http://127.0.0.1:1234/v1/chat/completions";
        public string ApiEndpoint { get => _apiEndpoint; set => SetProperty(ref _apiEndpoint, value); }

        private string _modelName = "";
        public string ModelName { get => _modelName; set => SetProperty(ref _modelName, value); }

        private string _apiKey = "";
        public string ApiKey { get => _apiKey; set => SetProperty(ref _apiKey, value); }

        private double _temperature = 0.7;
        public double Temperature { get => _temperature; set => SetProperty(ref _temperature, value); }

        private int _maxTokens = 2048;
        public int MaxTokens { get => _maxTokens; set => SetProperty(ref _maxTokens, value); }

        // ── Prompt ───────────────────────────────────────────────────────────────

        private string _systemPrompt = "";
        public string SystemPrompt { get => _systemPrompt; set => SetProperty(ref _systemPrompt, value); }

        private string _userPrompt = "";
        public string UserPrompt { get => _userPrompt; set => SetProperty(ref _userPrompt, value); }

        // ── Output ───────────────────────────────────────────────────────────────

        private string _outputDirectory = "";
        public string OutputDirectory { get => _outputDirectory; set => SetProperty(ref _outputDirectory, value); }

        private string _outputFilePrefix = "batch";
        public string OutputFilePrefix { get => _outputFilePrefix; set => SetProperty(ref _outputFilePrefix, value); }

        private int _maxFileSizeMb = 250;
        public int MaxFileSizeMb { get => _maxFileSizeMb; set => SetProperty(ref _maxFileSizeMb, value); }

        // ── Timeout ──────────────────────────────────────────────────────────────

        private int _apiTimeoutSeconds = 120;
        public int ApiTimeoutSeconds { get => _apiTimeoutSeconds; set => SetProperty(ref _apiTimeoutSeconds, value); }

        private double _timeoutPerTokenRatio = 0.5;
        public double TimeoutPerTokenRatio { get => _timeoutPerTokenRatio; set => SetProperty(ref _timeoutPerTokenRatio, value); }

        // ── Verifica qualita ─────────────────────────────────────────────────────

        private bool _enableQualityVerification = false;
        public bool EnableQualityVerification { get => _enableQualityVerification; set => SetProperty(ref _enableQualityVerification, value); }

        private bool _useSameModelForVerification = true;
        public bool UseSameModelForVerification { get => _useSameModelForVerification; set => SetProperty(ref _useSameModelForVerification, value); }

        private string _verificationApiEndpoint = "";
        public string VerificationApiEndpoint { get => _verificationApiEndpoint; set => SetProperty(ref _verificationApiEndpoint, value); }

        private string _verificationModelName = "";
        public string VerificationModelName { get => _verificationModelName; set => SetProperty(ref _verificationModelName, value); }

        private string _verificationApiKey = "";
        public string VerificationApiKey { get => _verificationApiKey; set => SetProperty(ref _verificationApiKey, value); }

        private double _revenuePerHighQualityRecord = 0.005;
        public double RevenuePerHighQualityRecord { get => _revenuePerHighQualityRecord; set => SetProperty(ref _revenuePerHighQualityRecord, value); }

        // ── Costi ────────────────────────────────────────────────────────────────

        private double _electricityCostPerKwh = 0.25;
        public double ElectricityCostPerKwh { get => _electricityCostPerKwh; set => SetProperty(ref _electricityCostPerKwh, value); }

        private double _systemPowerWatt = 350;
        public double SystemPowerWatt { get => _systemPowerWatt; set => SetProperty(ref _systemPowerWatt, value); }

        private string _apiCostType = "Free";
        public string ApiCostType { get => _apiCostType; set => SetProperty(ref _apiCostType, value); }
        public string[] ApiCostTypes { get; } = { "Free", "PerCall", "PerBlock" };

        private double _apiCostPerCall = 0;
        public double ApiCostPerCall { get => _apiCostPerCall; set => SetProperty(ref _apiCostPerCall, value); }

        private double _apiCostPerBlock = 0;
        public double ApiCostPerBlock { get => _apiCostPerBlock; set => SetProperty(ref _apiCostPerBlock, value); }

        private int _apiBlockSize = 1000;
        public int ApiBlockSize { get => _apiBlockSize; set => SetProperty(ref _apiBlockSize, value); }

        // ── Status ───────────────────────────────────────────────────────────────

        private string _statusMessage = "";
        public string StatusMessage { get => _statusMessage; set => SetProperty(ref _statusMessage, value); }

        // ── Commands ─────────────────────────────────────────────────────────────

        public RelayCommand SaveCommand { get; }
        public RelayCommand BrowseOutputDirectoryCommand { get; }
        public RelayCommand ResetTelemetryCommand { get; }
        public RelayCommand ResetDatabaseCommand { get; }
        public RelayCommand InsertDefaultBettingPromptCommand { get; }

        // ── Constructor ──────────────────────────────────────────────────────────

        public SettingsViewModel()
        {
            SaveCommand                     = new RelayCommand(Save);
            BrowseOutputDirectoryCommand    = new RelayCommand(BrowseOutputDirectory);
            ResetTelemetryCommand           = new RelayCommand(ResetTelemetry);
            ResetDatabaseCommand            = new RelayCommand(ResetDatabase);
            InsertDefaultBettingPromptCommand = new RelayCommand(InsertDefaultBettingPrompt);

            Load();
        }

        // ── Private methods ──────────────────────────────────────────────────────

        public void Load()
        {
            try
            {
                var s = SynthDataDbContext.LoadSettings();
                ApiEndpoint                 = s.ApiEndpoint;
                ModelName                   = s.ModelName;
                ApiKey                      = s.ApiKey;
                Temperature                 = s.Temperature;
                MaxTokens                   = s.MaxTokens;
                SystemPrompt                = s.SystemPrompt;
                UserPrompt                  = s.UserPrompt;
                OutputDirectory             = s.OutputDirectory;
                OutputFilePrefix            = s.OutputFilePrefix;
                MaxFileSizeMb               = s.MaxFileSizeMb;
                ApiTimeoutSeconds           = s.ApiTimeoutSeconds;
                TimeoutPerTokenRatio        = s.TimeoutPerTokenRatio;
                EnableQualityVerification   = s.EnableQualityVerification;
                UseSameModelForVerification = s.UseSameModelForVerification;
                VerificationApiEndpoint     = s.VerificationApiEndpoint;
                VerificationModelName       = s.VerificationModelName;
                VerificationApiKey          = s.VerificationApiKey;
                RevenuePerHighQualityRecord = s.RevenuePerHighQualityRecord;
                ElectricityCostPerKwh       = s.ElectricityCostPerKwh;
                SystemPowerWatt             = s.SystemPowerWatt;
                ApiCostType                 = s.ApiCostType;
                ApiCostPerCall              = s.ApiCostPerCall;
                ApiCostPerBlock             = s.ApiCostPerBlock;
                ApiBlockSize                = s.ApiBlockSize;

                StatusMessage = "Impostazioni caricate.";
            }
            catch (Exception ex)
            {
                StatusMessage = "Errore caricamento: " + ex.Message;
            }
        }

        private void Save()
        {
            if (string.IsNullOrWhiteSpace(OutputDirectory))
            {
                StatusMessage = "Seleziona una cartella di output.";
                return;
            }
            try
            {
                SynthDataDbContext.SaveSettings(new AppSettings
                {
                    ApiEndpoint                 = ApiEndpoint,
                    ModelName                   = ModelName,
                    ApiKey                      = ApiKey,
                    Temperature                 = Temperature,
                    MaxTokens                   = MaxTokens,
                    SystemPrompt                = SystemPrompt,
                    UserPrompt                  = UserPrompt,
                    OutputDirectory             = OutputDirectory,
                    OutputFilePrefix            = OutputFilePrefix,
                    MaxFileSizeMb               = MaxFileSizeMb,
                    ApiTimeoutSeconds           = ApiTimeoutSeconds,
                    TimeoutPerTokenRatio        = TimeoutPerTokenRatio,
                    EnableQualityVerification   = EnableQualityVerification,
                    UseSameModelForVerification = UseSameModelForVerification,
                    VerificationApiEndpoint     = VerificationApiEndpoint,
                    VerificationModelName       = VerificationModelName,
                    VerificationApiKey          = VerificationApiKey,
                    RevenuePerHighQualityRecord = RevenuePerHighQualityRecord,
                    ElectricityCostPerKwh       = ElectricityCostPerKwh,
                    SystemPowerWatt             = SystemPowerWatt,
                    ApiCostType                 = ApiCostType,
                    ApiCostPerCall              = ApiCostPerCall,
                    ApiCostPerBlock             = ApiCostPerBlock,
                    ApiBlockSize                = ApiBlockSize,
                });
                StatusMessage = "Impostazioni salvate.";
            }
            catch (Exception ex)
            {
                StatusMessage = "Errore salvataggio: " + ex.Message;
            }
        }

        private void BrowseOutputDirectory()
        {
            var dlg = new System.Windows.Forms.FolderBrowserDialog
            {
                Description = "Seleziona la cartella di output",
                SelectedPath = OutputDirectory
            };
            if (dlg.ShowDialog() == System.Windows.Forms.DialogResult.OK)
                OutputDirectory = dlg.SelectedPath;
        }

        private void ResetTelemetry()
        {
            if (MessageBox.Show("Eliminare TUTTA la telemetria?", "Conferma", MessageBoxButton.YesNo, MessageBoxImage.Warning) != MessageBoxResult.Yes)
                return;
            try { SynthDataDbContext.DeleteAllTelemetry(); StatusMessage = "Telemetria eliminata."; }
            catch (Exception ex) { StatusMessage = "Errore: " + ex.Message; }
        }

        private void ResetDatabase()
        {
            if (MessageBox.Show("Resettare COMPLETAMENTE il database? Tutte le impostazioni e la telemetria verranno cancellate.",
                "Conferma Reset", MessageBoxButton.YesNo, MessageBoxImage.Stop) != MessageBoxResult.Yes)
                return;
            try { SynthDataDbContext.ResetDatabase(); Load(); StatusMessage = "Database resettato."; }
            catch (Exception ex) { StatusMessage = "Errore: " + ex.Message; }
        }

        private void InsertDefaultBettingPrompt()
        {
            SystemPrompt =
                "Sei il nodo validatore di una blockchain per una piattaforma di scommesse decentralizzata. " +
                "Il tuo compito e generare transazioni fittizie ma realistiche in formato JSON puro. " +
                "Non includere testo introduttivo o conclusivo, restituisci solo un array di oggetti JSON.\n\n" +
                "Regole per la generazione dei dati:\n" +
                "- Ogni transazione deve avere un tx_hash esadecimale casuale di 64 caratteri e un timestamp ISO 8601.\n" +
                "- bet_type puo essere solo 'singola' o 'multipla'.\n" +
                "- Genera un bankroll_at_time casuale tra 100 e 5000.\n" +
                "- Logica dello Stake: Se 'singola', stake_amount deve essere intero e multiplo di 5. " +
                "Se 'multipla', genera confidence_level tra 0.0 e 1.0. Se confidenza tra 0.9 e 1.0, " +
                "stake_amount fino al 10% del bankroll. Altrimenti sotto l'1%.\n" +
                "- Includi smart_contract_log che spiega come lo smart contract ha processato i fondi.";

            UserPrompt = "Genera un blocco di 5 nuove transazioni sequenziali rispettando rigorosamente le regole di business.";

            StatusMessage = "Prompt blockchain betting inseriti. Ricorda di salvare.";
        }

        private void ApplyPreset(string preset)
        {
            switch (preset)
            {
                case "OpenAI":
                    ApiEndpoint = "https://api.openai.com/v1/chat/completions";
                    ModelName   = "gpt-4o";
                    StatusMessage = "Preset OpenAI applicato. Inserisci la API Key.";
                    break;
                case "Anthropic":
                    ApiEndpoint = "https://api.anthropic.com/v1/messages";
                    ModelName   = "claude-3-5-sonnet-20241022";
                    StatusMessage = "Preset Anthropic applicato. Inserisci la API Key.";
                    break;
                case "Google AI":
                    ApiEndpoint = "https://generativelanguage.googleapis.com/v1beta/openai/chat/completions";
                    ModelName   = "gemini-2.0-flash-exp";
                    StatusMessage = "Preset Google AI applicato. Inserisci la API Key.";
                    break;
                case "Azure OpenAI":
                    ApiEndpoint = "https://<resource>.openai.azure.com/openai/deployments/<deployment>/chat/completions?api-version=2024-02-15-preview";
                    ModelName   = "gpt-4";
                    StatusMessage = "Sostituisci <resource> e <deployment>.";
                    break;
                case "LM Studio (Local)":
                    ApiEndpoint = "http://127.0.0.1:1234/v1/chat/completions";
                    ModelName   = "";
                    ApiKey      = "";
                    StatusMessage = "Preset LM Studio applicato.";
                    break;
                case "Ollama (Local)":
                    ApiEndpoint = "http://127.0.0.1:11434/v1/chat/completions";
                    ModelName   = "llama3.3";
                    ApiKey      = "";
                    StatusMessage = "Preset Ollama applicato.";
                    break;
            }
        }
    }
}