using EVCB_OCPP.Domain;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace EVCB_OCPP.WSServer.Helper;

public static class AddPortalDbContext
{
    public const string CommandTimeoutKey = "CommandTimeout";
    public static IServiceCollection AddMainDbContext(this IServiceCollection services, IConfiguration configuration)
    { 
        const string DbUserIdKey = "MainDbUserIdKey";
        const string DbPassKey = "MainDbPass";
        const string DbConnectionStringKey = "MainDBContext";

        AddPortalDbContextInternal<MainDBContext>(services,configuration, DbUserIdKey, DbPassKey, DbConnectionStringKey, logToConsole: false);
        return services;
    }

    public static IServiceCollection AddMeterValueDbContext(this IServiceCollection services, IConfiguration configuration)
    {
        const string DbUserIdKey = "MeterValueDbUserId";
        const string DbPassKey = "MeterValueDbPass";
        const string DbConnectionStringKey = "MeterValueDBContext";

        AddPortalDbContextInternal<MeterValueDBContext>(services, configuration, DbUserIdKey, DbPassKey, DbConnectionStringKey, logToConsole: false);
        return services;
    }

    public static IServiceCollection AddConnectionLogDbContext(this IServiceCollection services, IConfiguration configuration)
    {
        const string DbUserIdKey = "ConnectionLogDbUserId";
        const string DbPassKey = "ConnectionLogDbPass";
        const string DbConnectionStringKey = "ConnectionLogDBContext";

        AddPortalDbContextInternal<ConnectionLogDBContext>(services, configuration, DbUserIdKey, DbPassKey, DbConnectionStringKey);
        return services;
    }

    private static void AddPortalDbContextInternal<T>(
        IServiceCollection services, IConfiguration configuration,
        string UserIdKey,string DbPassKey, string ConnectionStringKey,bool logToConsole = false) where T : DbContext
    {

        var commandTimeout = int.TryParse(configuration[CommandTimeoutKey], out var temp) ? temp : 180;
        string mainDbUserId = string.IsNullOrEmpty(configuration[UserIdKey]) ? string.Empty : $"user id={configuration[UserIdKey]};";
        string mainDbUserPass = string.IsNullOrEmpty(configuration[DbPassKey]) ? string.Empty : $"password={configuration[DbPassKey]};";

        services.AddPooledDbContextFactory<T>((serviceProvider, options) => {
            var cString = configuration.GetConnectionString(ConnectionStringKey);
            cString = $"{cString}{mainDbUserId}{mainDbUserPass}";
            options.UseSqlServer(cString, dbOptions =>
            {
                dbOptions.CommandTimeout(commandTimeout);
            });
            if(logToConsole)
            {
                options.LogTo(Console.WriteLine);
            }
        });
    }
}