using System;
using System.Collections.Generic;
using System.Linq;
using FinlyticAssets.Entities;
using FinlyticCore.Dtos.Assets;

namespace FinlyticAssets.Util;

public static class AssetMapper
{
    public static AssetDto ToDto(this AssetEntity entity)
    {
        var dtoTags = entity.Tags.Select(t => new TagDto 
        { 
            Id = t.Id, 
            Name = t.Name, 
            Type = t.Type 
        }).ToList();

        var dynamicLogoUrl = $"/api/v1/logo/{entity.Isin}";

        return entity switch
        {
            StockEntity stock => new StockDto
            {
                Isin = stock.Isin,
                Name = stock.Name,
                Type = stock.Type,
                InstrumentCategory = stock.InstrumentCategory,
                HasCfd = stock.HasCfd,
                ImageId = dynamicLogoUrl,
                LastUpdatedAt = stock.LastUpdatedAt,
                Tags = dtoTags,
                DerivativeProductCategories = stock.DerivativeProductCategories
            },
            EtfEntity etf => new EtfDto
            {
                Isin = etf.Isin,
                Name = etf.Name,
                Type = etf.Type,
                InstrumentCategory = etf.InstrumentCategory,
                HasCfd = etf.HasCfd,
                ImageId = dynamicLogoUrl,
                LastUpdatedAt = etf.LastUpdatedAt,
                Tags = dtoTags,
                DerivativeProductCategories = etf.DerivativeProductCategories,
                EtfDescription = etf.EtfDescription,
                MappedEtfIndexName = etf.MappedEtfIndexName,
                Subtitle = etf.Subtitle,
                SearchSubtitle = etf.SearchSubtitle
            },
            SyntheticEntity synth => new SyntheticDto
            {
                Isin = synth.Isin,
                Name = synth.Name,
                Type = synth.Type,
                InstrumentCategory = synth.InstrumentCategory,
                HasCfd = synth.HasCfd,
                ImageId = dynamicLogoUrl,
                LastUpdatedAt = synth.LastUpdatedAt,
                Tags = dtoTags,
                DerivativeProductCategories = synth.DerivativeProductCategories
            },
            _ => new StockDto
            {
                Isin = entity.Isin,
                Name = entity.Name,
                Type = entity.Type,
                InstrumentCategory = entity.InstrumentCategory,
                HasCfd = entity.HasCfd,
                ImageId = dynamicLogoUrl,
                LastUpdatedAt = entity.LastUpdatedAt,
                Tags = dtoTags
            }
        };
    }

    public static DerivativeDto ToDto(this DerivativeEntity deriv)
    {
        return new DerivativeDto
        {
            Isin = deriv.Isin,
            Name = deriv.Name,
            Type = "derivative",
            InstrumentCategory = "derivative",
            HasCfd = false,
            ImageId = $"/api/v1/logo/{deriv.UnderlyingIsin}",
            LastUpdatedAt = deriv.LastUpdatedAt,
            Tags = new List<TagDto>(),
            DerivativeProductCategories = deriv.DerivativeProductCategories,
            UnderlyingIsin = deriv.UnderlyingIsin,
            OptionType = deriv.OptionType.ToString(),
            ProductCategoryName = deriv.ProductCategoryName,
            NextGenProductCategoryName = deriv.NextGenProductCategoryName,
            Strike = deriv.Strike,
            Barrier = deriv.Barrier,
            Leverage = deriv.Leverage,
            Size = deriv.Size,
            Factor = deriv.Factor,
            Delta = deriv.Delta,
            Currency = deriv.Currency,
            Expiry = deriv.Expiry,
            Issuer = deriv.Issuer,
            IssuerDisplayName = deriv.IssuerDisplayName,
            IssuerImageId = null
        };
    }
    
    public static List<AssetDto> ToDtoList(this IEnumerable<AssetEntity> entities)
    {
        return entities.Select(e => e.ToDto()).ToList();
    }

    public static List<DerivativeDto> ToDtoList(this IEnumerable<DerivativeEntity> derivatives)
    {
        return derivatives.Select(d => d.ToDto()).ToList();
    }
}