using System;
using System.IO;
using Электронная_Фармация.Properties;

namespace Электронная_Фармация.Classes
{
    /// <summary>
    /// Shared application paths and API settings.
    /// </summary>
    public static class AppConfig
    {
        public const string DefaultApiBaseUrl = "https://24pharmdata.ru";
        private const string LegacyApiBaseUrl = "http://195.34.241.84:9988";
        private const string ApiBaseUrlEnvVar = "ELF_API_BASE_URL";

        /// <summary>
        /// Replaces known dead API URLs in saved user settings.
        /// </summary>
        public static void MigrateLegacySettings()
        {
            var current = Settings.Default.ApiBaseUrl;
            if (string.IsNullOrWhiteSpace(current))
            {
                return;
            }

            var normalized = NormalizeApiBaseUrl(current);
            if (string.Equals(normalized, LegacyApiBaseUrl, StringComparison.OrdinalIgnoreCase) ||
                string.Equals(normalized, "http://195.34.241.84:9988", StringComparison.OrdinalIgnoreCase))
            {
                Settings.Default.ApiBaseUrl = DefaultApiBaseUrl;
                Settings.Default.stringToken = string.Empty;
                Settings.Default.Save();
                AppDebugLog.Info("AppConfig", $"ApiBaseUrl мигрирован: {LegacyApiBaseUrl} -> {DefaultApiBaseUrl}");
            }
        }

        public static string ApiBaseUrl
        {
            get
            {
                var fromSettings = Settings.Default.ApiBaseUrl;
                if (!string.IsNullOrWhiteSpace(fromSettings))
                {
                    return NormalizeApiBaseUrl(fromSettings);
                }

                var fromEnv = Environment.GetEnvironmentVariable(ApiBaseUrlEnvVar);
                if (!string.IsNullOrWhiteSpace(fromEnv))
                {
                    return NormalizeApiBaseUrl(fromEnv);
                }

                return DefaultApiBaseUrl;
            }
        }

        public static string NormalizeApiBaseUrl(string url)
        {
            if (string.IsNullOrWhiteSpace(url))
            {
                return DefaultApiBaseUrl;
            }

            url = url.Trim().TrimEnd('/');
            if (!url.StartsWith("http://", StringComparison.OrdinalIgnoreCase) &&
                !url.StartsWith("https://", StringComparison.OrdinalIgnoreCase))
            {
                url = "http://" + url;
            }

            return url;
        }

        public static string SqliteDbPath
        {
            get
            {
                var baseDir = AppDomain.CurrentDomain.BaseDirectory;
                var root = Path.Combine(baseDir, "efClient.db");
                var data = Path.Combine(baseDir, "Data", "efClient.db");
                if (File.Exists(root))
                {
                    return root;
                }

                if (File.Exists(data))
                {
                    return data;
                }

                return root;
            }
        }

        public static string SqliteConnectionString
        {
            get { return $"Data Source={SqliteDbPath};Version=3;New=False;"; }
        }

        public static string LocationId
        {
            get { return Settings.Default.LocationId ?? string.Empty; }
        }

        public static void SetLocationId(string locationId)
        {
            Settings.Default.LocationId = (locationId ?? string.Empty).Trim();
            Settings.Default.Save();
        }

        public static string InvoiceExportPath
        {
            get { return Settings.Default.InvoiceExportPath ?? string.Empty; }
        }

        public static void SetInvoiceExportPath(string path)
        {
            Settings.Default.InvoiceExportPath = (path ?? string.Empty).Trim();
            Settings.Default.Save();
        }
    }
}