using Microsoft.AspNetCore.Mvc;
using PartSource.Data.Dtos;
using PartSource.Data.Models;
using PartSource.Data.Nexpart;
using PartSource.Services;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Part = PartSource.Data.Models.Part;

namespace PartSource.Api.Controllers
{
    [Route("v2/[controller]")]
    [ApiController]
    [ApiExplorerSettings(GroupName = "v1")]
    public class PartsController : BaseNexpartController
    {
        private readonly NexpartService _nexpartService;
        private readonly PartService _partService;
        private readonly VehicleService _vehicleService;
        private readonly FitmentService _fitmentService;

        public PartsController(NexpartService nexpartService, PartService partService, VehicleService vehicleService, FitmentService fitmentService)
        {
            _nexpartService = nexpartService;
            _partService = partService;
            _vehicleService = vehicleService;
            _fitmentService = fitmentService;
        }

        [HttpGet]
        [Route("fitment")]
        [Route("fitmentnote")]
        public async Task<ActionResult> GetFitment([FromQuery] string sku, [FromQuery] int vehicleId)
        {
            VehicleFitmentDto vehicleFitment = await _fitmentService.GetFitmentNotes(sku, vehicleId);

            if (vehicleFitment == null)
            {
                return NotFound();
            }

            try
            {
                string[] segments = vehicleFitment.NoteText.Split(']');
                vehicleFitment.PartDescription = segments[0].TrimStart('[');
                vehicleFitment.DriveTypes = GetDriveTypesFromNote(vehicleFitment.NoteText);
                vehicleFitment.Notes = segments[1].Split(';')
                    .Select(n => n.Trim())
                    .ToList();
            }

            catch
            {
                throw new InvalidOperationException($"The note_text field provided by WHI for {vehicleFitment.LineCode} {vehicleFitment.PartNumber} was in an invalid format.");
            }

            SmartPageDataSearch smartPageDataSearch = new SmartPageDataSearch
            {
                Items = new[]
                {
                    new Item { PartNumber = vehicleFitment.PartNumber, MfrCode = vehicleFitment.LineCode }
                }
            };

            SmartPageDataSearchResponse smartPageResponse = await _nexpartService.SendRequest<SmartPageDataSearch, SmartPageDataSearchResponse>(smartPageDataSearch);
            if (smartPageResponse.ResponseBody?.Item != null)
            {
                PartType[] partTypes = smartPageResponse.ResponseBody.Item.Select(i => new PartType
                {
                    Id = i.Part.PartType.Id
                })
                .ToArray();

                ApplicationSearch applicationSearch = new ApplicationSearch
                {
                    VehicleIdentifier = new VehicleIdentifier
                    {
                        BaseVehicleId = vehicleFitment.BaseVehicleId,
                        EngineConfigId = vehicleFitment.EngineConfigId
                    },
                    MfrCode = new[] { vehicleFitment.LineCode },
                    PartType = partTypes,
                    GroupBy = "MFR",
                    QuestionOption = "QUESTION_OTHERWISE_APP"
                };

                ApplicationSearchResponse response = await _nexpartService.SendRequest<ApplicationSearch, ApplicationSearchResponse>(applicationSearch);
                if (response.ResponseBody != null && response.ResponseBody is Questions)
                {
                    Question driveTypeQuestion = ((Questions)response.ResponseBody).Question
                        .Where(q => q.Attribute == "DRIVE_TYPE")
                        .FirstOrDefault();

                    if (driveTypeQuestion != null)
                    {
                        foreach (Answer answer in driveTypeQuestion.Answer)
                        {
                            applicationSearch.Criterion = new[]
                            {
                                new Criterion { Attribute = "DRIVE_TYPE", Id = answer.Id}
                            };

                            ApplicationSearchResponse driveTypeResponse = await _nexpartService.SendRequest<ApplicationSearch, ApplicationSearchResponse>(applicationSearch);
                            if (driveTypeResponse.ResponseBody != null && ((Apps)driveTypeResponse.ResponseBody).App.Where(a => a.Part == vehicleFitment.PartNumber).Any())
                            {
                                vehicleFitment.DriveTypes.Add(answer.Value);
                            }
                        }
                    }
                }
            }

            return Ok(vehicleFitment);
        }

        [HttpGet]
        [Route("positions")]
        public async Task<ActionResult> GetPositions([FromQuery] string sku, [FromQuery] int vehicleId)
        {
            Part part = await _partService.GetPartBySku(sku);
            Vehicle vehicle = await _vehicleService.GetVehicleById(vehicleId);

            if (part == null)
            {
                return BadRequest(new
                {
                    Message = $"No part data is available for SKU {sku}. Confirm it is available in the database maintained by Sound Press.",
                    Reason = $"{nameof(_partService.GetPartBySku)} returned null"
                });
            }

            if (vehicle == null)
            {
                return BadRequest(new
                {
                    Message = $"No vehicle data is available for vehicle ID {vehicleId}. Confirm it is available in the database maintained by Sound Press.",
                    Reason = $"{nameof(_vehicleService.GetVehicleById)} returned null"
                });
            }

            IList<DcfMapping> mappings = await _partService.GetDcfMapping(part.LineCode);
            Item[] items = mappings.Select(m => new Item
            {
                PartNumber = part.PartNumber,
                MfrCode = m.WhiCode
            })
            .ToArray();

            SmartPageDataSearch smartPageDataSearch = new SmartPageDataSearch
            {
                Items = items
            };

            SmartPageDataSearchResponse smartPageResponse = await _nexpartService.SendRequest<SmartPageDataSearch, SmartPageDataSearchResponse>(smartPageDataSearch);
            if (smartPageResponse.ResponseBody?.Item == null)
            {
                return NotFound(new
                {
                    Message = $"No WHI data is available for SKU {sku}",
                    Reason = $"{nameof(SmartPageDataSearch)} returned null"
                });
            }

            PartType[] partTypes = smartPageResponse.ResponseBody.Item.Select(i => new PartType
            {
                Id = i.Part.PartType.Id
            })
            .ToArray();

            ApplicationSearch applicationSearch = new ApplicationSearch
            {
                VehicleIdentifier = new VehicleIdentifier
                {
                    BaseVehicleId = vehicle.BaseVehicleId
                },
                MfrCode = mappings.Select(m => m.WhiCode).ToArray(),
                PartType = new[] { new PartType { Id = smartPageResponse.ResponseBody.Item[0].Part.PartType.Id } },
                Criterion = new[]
                {
                    new Criterion
                    {
                        Attribute = "REGION",
                        Id = 2
                    }
                },
                GroupBy = "PARTTYPE"
            };

            ApplicationSearchResponse response = await _nexpartService.SendRequest<ApplicationSearch, ApplicationSearchResponse>(applicationSearch);

            if (response.ResponseBody == null)
            {
                return NotFound(new
                {
                    Message = $"No WHI data is available for SKU {sku}",
                    Reason = $"{nameof(ApplicationSearch)} returned null"
                });
            }

            IList<string> positions = new List<string>();
            foreach (App app in ((Apps)response.ResponseBody)?.App)
            {
                if (!string.IsNullOrEmpty(app.Position) && app.Part == part.PartNumber)
                {
                    positions.Add(app.Position);
                }
            }

            return Ok(new
            {
                VehicleId = vehicleId,
                Sku = sku,
                Positions = positions.Distinct()
            });
        }

        private IList<string> GetDriveTypesFromNote(string fitmentNote)
        {
            fitmentNote = fitmentNote.ToUpperInvariant();
            IList<string> driveTypes = new List<string>();

            if (fitmentNote.Contains("FWD"))
            {
                driveTypes.Add("FWD");
            }

            if (fitmentNote.Contains("RWD"))
            {
                driveTypes.Add("RWD");
            }

            if (fitmentNote.Contains("AWD"))
            {
                driveTypes.Add("AWD");
            }

            if (fitmentNote.Contains("4WD"))
            {
                driveTypes.Add("4WD");
            }

            return driveTypes;
        }

    }
}