using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Logic.Models;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;

namespace Performance.Services
{
    public static class SeedData
    {
        public static async Task InitializeAsync(
            RoleManager<IdentityRole<Guid>> identity, UserManager<User> userManager)
        {
            await EnsureRolesAsync(identity);
            await EnsureUserAsync(identity);
            await EnsureAdminAsync(identity);
            await EnsureTestAdminAsync(userManager);
        }

        private static async Task EnsureRolesAsync(
            RoleManager<IdentityRole<Guid>> roleManager)
        {
            var alreadyExists = await roleManager
                .RoleExistsAsync(Constants.SuperUser);

            if (alreadyExists) return;

            await roleManager.CreateAsync(
                new IdentityRole<Guid>(Constants.SuperUser));
        }

        private static async Task EnsureUserAsync(
            RoleManager<IdentityRole<Guid>> roleManager)
        {
            var alreadyExists = await roleManager
                .RoleExistsAsync(Constants.User);

            if (alreadyExists) return;

            await roleManager.CreateAsync(
                new IdentityRole<Guid>(Constants.User));
        }

        private static async Task EnsureAdminAsync(
            RoleManager<IdentityRole<Guid>> roleManager)
        {
            var alreadyExists = await roleManager
                .RoleExistsAsync(Constants.AdministratorRole);

            if (alreadyExists) return;

            await roleManager.CreateAsync(
                new IdentityRole<Guid>(Constants.AdministratorRole));
        }

        private static async Task EnsureTestAdminAsync(
            UserManager<User> userManager)
        {
            var testAdmin = await userManager.Users
                .Where(x => x.UserName == "test@example.com")
                .SingleOrDefaultAsync();

            if (testAdmin != null) return;

            testAdmin = new User
            {
                UserName = "test@example.com",
                Email = "test@example.com"
            };
            await userManager.CreateAsync(
                testAdmin, "qwe123asd");
            await userManager.AddToRoleAsync(
                testAdmin, Constants.SuperUser);
        }

    }
}