using Microsoft.AspNetCore.Mvc;
using TileServer.Application.Sync;
using TileServer.Domain.Exceptions;

namespace TileServer.Api.Controllers;

[ApiController]
[Route("api/v1/sync")]
public sealed class SyncController(IMapSyncService sync, ILogger<SyncController> logger) : ControllerBase
{
    [HttpGet("status")]
    [ProducesResponseType(typeof(SyncJobStatus), StatusCodes.Status200OK)]
    public IActionResult Status() => Ok(sync.GetStatus());

    [HttpPost]
    [ProducesResponseType(StatusCodes.Status202Accepted)]
    [ProducesResponseType(StatusCodes.Status409Conflict)]
    public IActionResult RunAll()
        => Start(() => sync.RunAllAsync(CancellationToken.None), "Synchronization started for all extracts.");

    [HttpPost("{extractId}")]
    [ProducesResponseType(StatusCodes.Status202Accepted)]
    [ProducesResponseType(StatusCodes.Status409Conflict)]
    public IActionResult RunOne(string extractId)
        => Start(() => sync.RunOneAsync(extractId, CancellationToken.None), $"Synchronization started for '{extractId}'.");

    private IActionResult Start(Func<Task> work, string message)
    {
        if (sync.GetStatus().IsRunning)
        {
            return Conflict(new { message = "A synchronization job is already running." });
        }

        _ = RunInBackground(work);
        return Accepted(new { message });
    }

    private async Task RunInBackground(Func<Task> work)
    {
        try
        {
            await work().ConfigureAwait(false);
        }
        catch (ResourceConflictException)
        {
            logger.LogInformation("Sync request ignored because another job is running.");
        }
        catch (Exception ex)
        {
            logger.LogError(ex, "Background synchronization failed.");
        }
    }
}