using Data.SeaHavenIndustries;
using SeaHaven.DataServices.Interfaces;
using SeaHaven.Services.DTOs;
using SeaHaven.Services.Interfaces;

namespace SeaHaven.Services.Implementation
{
    public class QuotesService : IQuotesService
    {
        private readonly IQuotesDataService _quotesData;
        private readonly IWorkOrderDataService _workOrderData;

        public QuotesService(IQuotesDataService quotesData, IWorkOrderDataService workOrderData)
        {
            _quotesData = quotesData;
            _workOrderData = workOrderData;
        }

        public async Task CreateQuoteAsync(CreateQuoteInput input, CancellationToken cancellationToken)
        {
            var rnd = new Random();
            var id = rnd.Next(1, 99999);

            var quote = new Quotes
            {
                QuotId = id.ToString(),
                ContactId = input.ContactId,
                PO = input.PO,
                TT = input.TT,
                ProjectName = input.ProjectName,
                Date = input.Date,
                WorkorderId = input.WorkorderId,
                SiteName = input.SiteName,
                SiteId = input.SiteId,
                BillingAddress = input.BillingAddress,
                LineItems = new List<QuotesLineItems>()
            };

            if (input.LineItems != null && input.LineItems.Any())
            {
                foreach (var li in input.LineItems)
                {
                    quote.LineItems.Add(new QuotesLineItems
                    {
                        LineitemNumber = li.LineitemNumber,
                        Lineitem = li.Lineitem,
                        Descriptions = li.Descriptions
                    });
                }
            }

            await _quotesData.AddAsync(quote);
        }

        public async Task<bool> UpdateQuoteAsync(UpdateQuoteInput input, CancellationToken cancellationToken)
        {
            var quote = await _quotesData.GetByIdAsync(input.Id);
            if (quote == null)
                return false;

            quote.QuotId = input.QuotId;
            quote.ContactId = input.ContactId;
            quote.PO = input.PO;
            quote.TT = input.TT;
            quote.ProjectName = input.ProjectName;
            quote.Date = input.Date;
            quote.WorkorderId = input.WorkorderId;
            quote.SiteName = input.SiteName;
            quote.SiteId = input.SiteId;
            quote.BillingAddress = input.BillingAddress;

            await _quotesData.DeleteLineItemsByQuoteIdAsync(input.Id, cancellationToken);

            quote.LineItems ??= new List<QuotesLineItems>();

            if (input.LineItems != null && input.LineItems.Any())
            {
                foreach (var li in input.LineItems)
                {
                    quote.LineItems.Add(new QuotesLineItems
                    {
                        LineitemNumber = li.LineitemNumber,
                        Lineitem = li.Lineitem,
                        Descriptions = li.Descriptions
                    });
                }
            }

            await _quotesData.UpdateAsync(quote);
            return true;
        }

        public async Task<bool> DeleteQuoteAsync(int id, CancellationToken cancellationToken)
        {
            var quote = await _quotesData.GetByIdAsync(id);
            if (quote == null)
                return false;

            await _quotesData.DeleteLineItemsByQuoteIdAsync(id, cancellationToken);
            await _quotesData.DeleteAsync(id);
            return true;
        }

        public async Task<PagedQuotesResult> GetQuotesPagedAsync(int page, int pageSize, string search, CancellationToken cancellationToken)
        {
            var (items, totalCount) = await _quotesData.GetQuotesPagedAsync(page, pageSize, search, cancellationToken);

            return new PagedQuotesResult
            {
                Items = items.Select(item => new QuoteListItemDTO
                {
                    Id = item.Id,
                    QuoteId = item.QuoteId,
                    WorkOrder = item.WorkOrder,
                    ProjectName = item.ProjectName,
                    TotalAmount = FormatAmount(item.TotalAmount),
                    SiteName = item.SiteName,
                    SiteId = item.SiteId,
                    PO = item.PO,
                    TT = item.TT,
                    BillingAddress = item.BillingAddress,
                    Status = item.Status,
                    ContactId = item.ContactId,
                    Date = item.Date,
                    Lineitems = item.Lineitems.Select(MapLineItem).ToList()
                }).ToList(),
                TotalCount = totalCount
            };
        }

        public async Task<IReadOnlyList<WorkOrderQuoteDetailDTO>> GetWorkOrderQuoteDetailsAsync(
            int woId, CancellationToken cancellationToken)
        {
            var items = await _quotesData.GetWorkOrderQuoteDetailsAsync(woId, cancellationToken);
            return items.Select(item => new WorkOrderQuoteDetailDTO
            {
                Id = item.Id,
                PO = item.PO,
                TT = item.TT,
                Title = item.Title,
                Name = item.Name
            }).ToList();
        }

        public async Task<QuoteDetailDTO?> GetQuoteDetailsByIdAsync(
            int id, CancellationToken cancellationToken)
        {
            var item = await _quotesData.GetQuoteDetailsByIdAsync(id, cancellationToken);
            return item == null ? null : new QuoteDetailDTO
            {
                Id = item.Id,
                QuotId = item.QuotId,
                Date = item.Date,
                Name = item.Name,
                PO = item.PO,
                TT = item.TT,
                SiteName = item.SiteName,
                ProjectName = item.ProjectName,
                SiteId = item.SiteId,
                BillingAddress = item.BillingAddress,
                ShippingAddress = item.ShippingAddress,
                TotalAmount = FormatAmount(item.TotalAmount),
                Lineitems = item.Lineitems.Select(MapLineItem).ToList()
            };
        }

        public async Task<QuoteReportingData> GetReportingAsync(CancellationToken cancellationToken)
        {
            return new QuoteReportingData
            {
                TotalCreatedWorkOrder = await _workOrderData.CountAsync(),
                TotalCompleted = await _workOrderData.CountByStatusAsync("Done"),
                TotalSev1 = await _workOrderData.CountByPriorityAsync("Sev 1"),
                TotalSev2 = await _workOrderData.CountByPriorityAsync("Sev 2"),
                TotalSev3 = await _workOrderData.CountByPriorityAsync("Sev 3"),
                TotalSev4 = await _workOrderData.CountByPriorityAsync("Sev 4"),
                TotalSev5 = await _workOrderData.CountByPriorityAsync("Sev 5")
            };
        }

        private static QuoteLineItemDTO MapLineItem(
            SeaHaven.DataServices.Models.QuoteLineItemReadModel item) => new()
            {
                Descriptions = item.Descriptions,
                Lineitem = item.Lineitem,
                LineitemNumber = item.LineitemNumber
            };

        private static string FormatAmount(decimal amount) => $"${amount}";
    }
}