using DigitalData.Core.Abstraction.Application.DTO;
using EnvelopeGenerator.Application.Common.Dto.EnvelopeReceiverReadOnly;
using EnvelopeGenerator.Application.Common.Interfaces.Services;
using EnvelopeGenerator.Domain.Constants;
using EnvelopeGenerator.GeneratorAPI.Extensions;
using Microsoft.AspNetCore.Authorization;
using Microsoft.AspNetCore.Mvc;
using Newtonsoft.Json;

namespace EnvelopeGenerator.GeneratorAPI.Controllers;

/// <summary>
/// Manages read-only envelope sharing flows.
/// </summary>
[Route("api/[controller]")]
[ApiController]
public class ReadOnlyController : ControllerBase
{
    private readonly ILogger<ReadOnlyController> _logger;
    private readonly IEnvelopeReceiverReadOnlyService _readOnlyService;
    private readonly IEnvelopeMailService _mailService;
    private readonly IEnvelopeHistoryService _historyService;

    /// <summary>
    /// Initializes a new instance of the <see cref="ReadOnlyController"/> class.
    /// </summary>
    public ReadOnlyController(ILogger<ReadOnlyController> logger, IEnvelopeReceiverReadOnlyService readOnlyService, IEnvelopeMailService mailService, IEnvelopeHistoryService historyService)
    {
        _logger = logger;
        _readOnlyService = readOnlyService;
        _mailService = mailService;
        _historyService = historyService;
    }

    /// <summary>
    /// Creates a new read-only receiver for the current envelope.
    /// </summary>
    /// <param name="createDto">Creation payload.</param>
    [HttpPost]
    [Authorize(Roles = ReceiverRole.FullyAuth)]
    public async Task<IActionResult> CreateAsync([FromBody] EnvelopeReceiverReadOnlyCreateDto createDto)
    {
        var authReceiverMail = User.GetAuthReceiverMail();
        if (authReceiverMail is null)
        {
            _logger.LogError("EmailAddress claim is not found in envelope-receiver-read-only creation process. Create DTO is:\n {dto}", JsonConvert.SerializeObject(createDto));
            return Unauthorized();
        }

        var envelopeId = User.GetAuthEnvelopeId();
        if (envelopeId is null)
        {
            _logger.LogError("Envelope Id claim is not found in envelope-receiver-read-only creation process. Create DTO is:\n {dto}", JsonConvert.SerializeObject(createDto));
            return Unauthorized();
        }

        createDto.AddedWho = authReceiverMail;
        createDto.EnvelopeId = envelopeId;

        var creationRes = await _readOnlyService.CreateAsync(createDto: createDto);

        if (creationRes.IsFailed)
        {
            _logger.LogNotice(creationRes);
            return StatusCode(StatusCodes.Status500InternalServerError);
        }

        var readRes = await _readOnlyService.ReadByIdAsync(creationRes.Data.Id);
        if (readRes.IsFailed)
        {
            _logger.LogNotice(creationRes);
            return StatusCode(StatusCodes.Status500InternalServerError);
        }

        var newReadOnly = readRes.Data;

        return await _mailService.SendAsync(newReadOnly).ThenAsync<int, IActionResult>(SuccessAsync: async _ =>
        {
            var histRes = await _historyService.RecordAsync((int)createDto.EnvelopeId, createDto.AddedWho, EnvelopeStatus.EnvelopeShared);
            if (histRes.IsFailed)
            {
                _logger.LogError("Although the envelope was sent as read-only, the EnvelopeShared history could not be saved. Create DTO:\n{createDto}", JsonConvert.SerializeObject(createDto));
                _logger.LogNotice(histRes.Notices);
            }

            return Ok();
        },

        Fail: (msg, ntc) =>
        {
            _logger.LogNotice(ntc);
            return StatusCode(StatusCodes.Status500InternalServerError);
        });
    }
}