namespace DevicesRestApi.Controllers;

using Microsoft.AspNetCore.Mvc;
using Microsoft.Extensions.Options;
using DevicesRestApi.Helpers;

[ApiController]
[Route("[controller]")]
public class ClustersController : ControllerBase
{
    private ClusterConfigurationFile? _clusterConfigurationFile;

    private readonly ILogger<ClustersController> _logger;

    private readonly AppSettings _appSettings;

    public ClustersController(
        ILogger<ClustersController> logger,
        IOptions<AppSettings> appSettings
    ) {
        _logger = logger;
        _appSettings = appSettings.Value;
    }

    [HttpGet]
    [Route("~/clusters/{clusterName}/schedules")]
    public IActionResult GetClusterSchedules(string clusterName)
    {
        _clusterConfigurationFile = null;
        try {
            _clusterConfigurationFile = new ClusterConfigurationFile(clusterName, _appSettings);
        }
        catch (ArgumentException e)
        {
            _logger.LogError($"Something went wrong: {e}");
            return new BadRequest(e.Message);
        }
        if (!_clusterConfigurationFile.DirectoryExists())
        {
            _logger.LogError($"Cluster not found: {_clusterConfigurationFile.GetDirectoryPath()}");
            return new NotFound("Cluster not found");
        }

        var filePath = _clusterConfigurationFile.GetFilePath();
        if (!_clusterConfigurationFile.FileExists())
        {
            _logger.LogError($"Configuration file not found: {filePath}");
            return new NotFound("Configuration file not found");
        }

        var schedule = new List<MeasuringEvent>();

        using (StreamReader reader = new StreamReader(filePath))
        {
            string line;
            while ((line = reader.ReadLine()) != null)
            {
                var s = line.Split(',');
                schedule.Add(
                    new MeasuringEvent() {
                        Day = (MeasuringDay)int.Parse(s[0]),
                        Time = s[1]
                    }
                );
            }
        }

        return new Ok(
            new{
                name = clusterName,
                schedule = schedule,
            }
        );
    }

    [HttpPost]
    [Route("~/clusters/{clusterName}/schedules")]
    public IActionResult UpdateClusterSchedules(string clusterName, UpdateScheduleRequest request)
    {
        var message = "Cluster updated";
        _clusterConfigurationFile = null;
        try {
            _clusterConfigurationFile = new ClusterConfigurationFile(clusterName, _appSettings);
        }
        catch (ArgumentException e)
        {
            _logger.LogError($"Something went wrong: {e}");
            return new BadRequest(e.Message);
        }
        if (!_clusterConfigurationFile.FileExists())
        {
            _clusterConfigurationFile.Create();
            message = "Cluster created";
        }
        if (request.Schedule?.Count > 0)
        {
            var filePath = _clusterConfigurationFile.GetFilePath();
            using (StreamWriter writer = new StreamWriter(filePath))
            {
                foreach (
                    var e in request.Schedule.OrderBy(s => s.Day).ThenBy(
                        s => TimeSpan.Parse(s.Time)
                    )
                ) {
                    var time = TimeSpan.Parse(e.Time);
                    writer.WriteLine($"{(int)e.Day},{time.ToString(@"hh\:mm")}");
                    writer.Flush();
                }
            }
        }

        return new Ok(message);
    }
}