using System;
using System.Text.Json;
using System.Text.Json.Serialization;

namespace MesaFabApproval.Models;

public record AppSettings(string Company,
                          string DbConnectionString,
                          string JwtAudience,
                          string JwtIssuer,
                          string JwtKey,
                          string MrbAttachmentPath,
                          string PcrbAttachmentPath,
                          bool ShouldSendEmail,
                          string SiteBaseUrl,
                          string WorkingDirectoryName) {

    public override string ToString() {
        string result = JsonSerializer.Serialize(this, AppSettingsSourceGenerationContext.Default.AppSettings);
        return result;
    }

    public static AppSettings Get(IConfigurationRoot configurationRoot) {
        AppSettings? result;
        try {
#pragma warning disable IL3050, IL2026
            result = configurationRoot.Get<AppSettings>() ?? throw new Exception();
#pragma warning restore IL3050, IL2026
        } catch (Exception) {
            List<string> paths = [];
            foreach (IConfigurationProvider configurationProvider in configurationRoot.Providers) {
                if (configurationProvider is not Microsoft.Extensions.Configuration.Json.JsonConfigurationProvider jsonConfigurationProvider)
                    continue;
                if (jsonConfigurationProvider.Source.FileProvider is not Microsoft.Extensions.FileProviders.PhysicalFileProvider physicalFileProvider)
                    continue;
                paths.Add(physicalFileProvider.Root);
            }

            throw new NotSupportedException($"Not found!{Environment.NewLine}{string.Join(Environment.NewLine, paths.Distinct())}");
        }

        return result;
    }

    internal static void SetEnvironmentVariables(WebApplicationBuilder builder) {
        builder.Configuration.AddUserSecrets<Program>();
        AppSettings appSettings = Get(builder.Configuration);
        Environment.SetEnvironmentVariable("FabApprovalDbConnectionString", appSettings.DbConnectionString);
        Environment.SetEnvironmentVariable("FabApprovalJwtAudience", appSettings.JwtAudience);
        Environment.SetEnvironmentVariable("FabApprovalJwtIssuer", appSettings.JwtIssuer);
        Environment.SetEnvironmentVariable("FabApprovalJwtKey", appSettings.JwtKey);
        Environment.SetEnvironmentVariable("FabApprovalMrbAttachmentPath", appSettings.MrbAttachmentPath);
        Environment.SetEnvironmentVariable("FabApprovalPcrbAttachmentPath", appSettings.PcrbAttachmentPath);
        Environment.SetEnvironmentVariable("FabApprovalShouldSendEmail", appSettings.ShouldSendEmail.ToString());
        Environment.SetEnvironmentVariable("NewFabApprovalBaseUrl", appSettings.SiteBaseUrl);
    }

    internal static AppSettings LoadEnvironmentVariables() {
        AppSettings result;
        string dbConnectionString = Environment.GetEnvironmentVariable("FabApprovalDbConnectionString") ??
            throw new ArgumentNullException("FabApprovalDbConnectionString environment variable not found");
        string jwtAudience = Environment.GetEnvironmentVariable("FabApprovalJwtAudience") ??
            throw new ArgumentNullException("FabApprovalJwtAudience environment variable not found");
        string jwtIssuer = Environment.GetEnvironmentVariable("FabApprovalJwtIssuer") ??
            throw new ArgumentNullException("FabApprovalJwtIssuer environment variable not found");
        string jwtKey = Environment.GetEnvironmentVariable("FabApprovalJwtKey") ??
            throw new ArgumentNullException("FabApprovalJwtKey environment variable not found");
        string mrbAttachmentPath = Environment.GetEnvironmentVariable("FabApprovalMrbAttachmentPath") ??
            throw new ArgumentNullException("FabApprovalMrbAttachmentPath environment variable not found");
        string pcrbAttachmentPath = Environment.GetEnvironmentVariable("FabApprovalPcrbAttachmentPath") ??
            throw new ArgumentNullException("FabApprovalPcrbAttachmentPath environment variable not found");
        if (!bool.TryParse(Environment.GetEnvironmentVariable("FabApprovalShouldSendEmail"), out bool shouldSendEmail))
            throw new ArgumentNullException("FabApprovalShouldSendEmail environment variable not found");
        string siteBaseUrl = Environment.GetEnvironmentVariable("NewFabApprovalBaseUrl") ??
            throw new ArgumentNullException("FabApprovalBaseUrl environment variable not found");
        result = new("Infineon Technologies Americas Corp.",
                     DbConnectionString: dbConnectionString,
                     JwtAudience: jwtAudience,
                     JwtIssuer: jwtIssuer,
                     JwtKey: jwtKey,
                     MrbAttachmentPath: mrbAttachmentPath,
                     PcrbAttachmentPath: pcrbAttachmentPath,
                     ShouldSendEmail: shouldSendEmail,
                     SiteBaseUrl: siteBaseUrl,
                     "IFXApps");
        return result;
    }
}

[JsonSourceGenerationOptions(WriteIndented = true)]
[JsonSerializable(typeof(AppSettings))]
internal partial class AppSettingsSourceGenerationContext : JsonSerializerContext {
}