using Hutopy.Infrastructure.Identity;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Identity;
using Microsoft.EntityFrameworkCore;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.Extensions.Logging;

namespace Hutopy.Infrastructure.Data;

public static class InitializerExtensions
{
    public static async Task InitialiseApplicationDatabaseAsync(this WebApplication app)
    {
        using var scope = app.Services.CreateScope();

        var initializer = scope.ServiceProvider.GetRequiredService<ApplicationDbContextInitializer>();

        await initializer.InitialiseAsync();

        await initializer.SeedAsync();
    }
}

public class ApplicationDbContextInitializer(
    ILogger<ApplicationDbContextInitializer> logger,
    ApplicationDbContext context,
    RoleManager<ApplicationRole> roleManager)
{
    public async Task InitialiseAsync()
    {
        try
        {
            await context.Database.MigrateAsync();
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "An error occurred while initialising the database.");
            throw;
        }
    }

    public async Task SeedAsync()
    {
        try
        {
            await TrySeedAsync();
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "An error occurred while seeding the database.");
            throw;
        }
    }

    private async Task TrySeedAsync()
    {
        var administratorRole = new ApplicationRole(KnownRoles.Administrator);
        if (roleManager.Roles.All(r => r.Name != administratorRole.Name))
        {
            await roleManager.CreateAsync(administratorRole);
        }

        var roleCreator = new ApplicationRole(KnownRoles.Creator);
        if (roleManager.Roles.All(r => r.Name != roleCreator.Name))
        {
            await roleManager.CreateAsync(roleCreator);
        }
    }
}