//-----------------------------------------------------------------------
// <copyright file="RootController.cs" company="aliasvault">
// Copyright (c) aliasvault. All rights reserved.
// Licensed under the AGPLv3 license. See LICENSE.md file in the project root for full license information.
// </copyright>
//-----------------------------------------------------------------------

namespace AliasVault.Api.Controllers;

using AliasServerDb;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;

/// <summary>
/// Root controller that contains health check endpoints.
/// </summary>
[ApiController]
[Route("/")]
public class RootController(IAliasServerDbContextFactory dbContextFactory) : ControllerBase
{
    /// <summary>
    /// Root endpoint that returns a 200 OK if the database connection is successful
    /// and the DB migrations are up-to-date.
    /// </summary>
    /// <returns>Http 200 if database connection is successful.</returns>
    [HttpGet]
    [ProducesResponseType<int>(StatusCodes.Status200OK)]
    [ProducesResponseType<int>(StatusCodes.Status500InternalServerError)]
    public async Task<IActionResult> Get()
    {
        await using var context = await dbContextFactory.CreateDbContextAsync();

        try
        {
            var appliedMigrations = await context.Database.GetAppliedMigrationsAsync();
            var allMigrations = context.Database.GetMigrations();

            if (allMigrations.Except(appliedMigrations).Any())
            {
                // There are pending migrations
                return StatusCode(500, "There are pending migrations. Please run 'dotnet ef database update' to apply them.");
            }

            // Database is up-to-date
            return Ok("OK");
        }
        catch
        {
            return StatusCode(500, "Internal server error");
        }
    }
}