using AsbCloudApp.Data;
using AsbCloudApp.Services;
using AsbCloudWebApi.SignalR;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.SignalR;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Threading;
using System.Threading.Tasks;
using AsbCloudApp.Requests;
using AsbCloudWebApi.SignalR.Clients;

namespace AsbCloudWebApi.Controllers;

/// <summary>
/// Отчет (временная диаграмма с сообщениями)
/// </summary>
[Route("api/well/{idWell}/report")]
[ApiController]
public class ReportController : ControllerBase
{
    private readonly IReportService reportService;
    private readonly IWellService wellService;
    private readonly IHubContext<ReportsHub, IReportHubClient> reportsHubContext;

    public ReportController(
        IReportService reportService, 
        IWellService wellService, 
        IHubContext<ReportsHub, 
        IReportHubClient> reportsHubContext)
    {
        this.reportService = reportService;
        this.wellService = wellService;
        this.reportsHubContext = reportsHubContext;
    }

    /// <summary>
    /// Создает отчет по скважине с указанными параметрами
    /// </summary>
    /// <param name="idWell">Id скважины</param>
    /// <param name="request">Параметры запроса</param>
    /// <param name="token">Токен для отмены задачи</param>
    /// <returns>id фоновой задачи формирования отчета</returns>
    [HttpPost]
    [Permission]
    [ProducesResponseType(typeof(int), (int)System.Net.HttpStatusCode.OK)]
    public async Task<IActionResult> CreateReportAsync([Required] int idWell, 
        [FromQuery] ReportParametersRequest request, 
        CancellationToken token)
    {
        var idCompany = User.GetCompanyId();
        var idUser = User.GetUserId();

        if ((idCompany is null) || (idUser is null))
            return Forbid();

        if (!await wellService.IsCompanyInvolvedInWellAsync((int)idCompany, 
                idWell, token).ConfigureAwait(false))
            return Forbid();

        void HandleReportProgressAsync(object progress, string id) =>
            Task.Run(async() =>
            {
                await reportsHubContext.Clients.Group($"Report_{id}")
                    .GetReportProgress(progress, token);
            }, token);

        var id = reportService.EnqueueCreateReportWork(idWell, (int)idUser, request, HandleReportProgressAsync);

        return Ok(id);
    }

    /// <summary>
    /// Возвращает имена всех отчетов по скважине
    /// </summary>
    /// <param name="idWell">id скважины</param>
    /// <param name="token">Токен для отмены задачи</param>
    /// <returns>Список имен существующих отчетов (отчетов)</returns>
    [HttpGet]
    [Permission]
    [ProducesResponseType(typeof(IEnumerable<string>), (int)System.Net.HttpStatusCode.OK)]
    public async Task<IActionResult> GetAllReportsNamesByWellAsync(int idWell, CancellationToken token)
    {
        int? idCompany = User.GetCompanyId();

        if (idCompany is null)
            return Forbid();

        if (!await wellService.IsCompanyInvolvedInWellAsync((int)idCompany,
            idWell, token).ConfigureAwait(false))
            return Forbid();

        var reports = await reportService.GetAllReportsByWellAsync(idWell, token).ConfigureAwait(false);

        return Ok(reports);
    }

    /// <summary>
    /// Возвращает прогнозируемое количество страниц будущего отчета
    /// </summary>
    /// <param name="idWell">Id скважины</param>
    /// <param name="request">Параметры запроса</param>
    /// <param name="token">Токен для отмены задачи</param>
    /// <returns>прогнозируемое кол-во страниц отчета</returns>
    [HttpGet("reportSize")]
    [Permission]
    [ProducesResponseType(typeof(string), (int)System.Net.HttpStatusCode.OK)]
    public async Task<IActionResult> GetReportSizeAsync([Required] int idWell, 
        [FromQuery] ReportParametersRequest request,
        CancellationToken token)
    {
        int? idCompany = User.GetCompanyId();

        if (idCompany is null)
            return Forbid();

        if (!await wellService.IsCompanyInvolvedInWellAsync((int)idCompany, 
                idWell, token).ConfigureAwait(false))
            return Forbid();
    
        int reportSize = reportService.GetReportPagesCount(idWell,
            request.Begin, request.End, request.StepSeconds, request.Format);

        return Ok(reportSize);
    }

    /// <summary>
    /// Возвращает даты самого старого и самого свежего отчетов в БД
    /// </summary>
    /// <param name="idWell">id скважины</param>
    /// <param name="token">Токен для отмены задачи</param>
    /// <returns>Даты самого старого и самого свежего отчетов в БД</returns>
    [HttpGet("datesRange")]
    [Permission]
    [ProducesResponseType(typeof(DatesRangeDto), (int)System.Net.HttpStatusCode.OK)]
    [ProducesResponseType((int)System.Net.HttpStatusCode.NoContent)]
    public async Task<IActionResult> GetReportsDateRangeAsync(int idWell, CancellationToken token)
    {
        int? idCompany = User.GetCompanyId();

        if (idCompany is null)
            return Forbid();

        if (!await wellService.IsCompanyInvolvedInWellAsync((int)idCompany,
            idWell, token).ConfigureAwait(false))
            return Forbid();

        var wellReportsDatesRange = reportService.GetDatesRangeOrDefault(idWell);

        if (wellReportsDatesRange is null)
            return NoContent();

        if (wellReportsDatesRange.From == wellReportsDatesRange.To)
            return NoContent();

        return Ok(wellReportsDatesRange);
    }
}