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

namespace SeaHaven.Services.Implementation
{
    public class DropdownOptionsService : IDropdownOptionsService
    {
        private readonly IDropdownOptionsDataService _dataService;

        public DropdownOptionsService(IDropdownOptionsDataService dataService)
        {
            _dataService = dataService;
        }

        public async Task<IEnumerable<DropdownOptionDTO>> GetAllAsync(string? category, CancellationToken cancellationToken)
        {
            var data = await _dataService.GetAllActiveAsync(category, cancellationToken);
            return data.Select(MapToDTO);
        }

        public async Task<IEnumerable<DropdownOptionDTO>> GetByCategoryAsync(string category, string? parent, CancellationToken cancellationToken)
        {
            var data = await _dataService.GetByCategoryAsync(category, parent, cancellationToken);
            return data.Select(MapToDTO);
        }

        public async Task<DropdownOptionDTO> CreateAsync(DropdownOptionDTO option, CancellationToken cancellationToken)
        {
            if (string.IsNullOrWhiteSpace(option.Category) || string.IsNullOrWhiteSpace(option.Value))
                throw new InvalidOperationException("Category and Value are required");

            if (await _dataService.ExistsAsync(option.Category, option.Value, option.ParentValue, cancellationToken))
                throw new InvalidOperationException("This option already exists");

            var entity = new DropdownOption
            {
                Id = 0,
                Category = option.Category,
                Value = option.Value,
                ParentValue = option.ParentValue,
                SortOrder = option.SortOrder,
                IsActive = true
            };

            var created = await _dataService.AddAsync(entity, cancellationToken);
            return MapToDTO(created);
        }

        public async Task<DropdownOptionDTO> UpdateAsync(int id, DropdownOptionDTO option, CancellationToken cancellationToken)
        {
            var item = await _dataService.GetByIdAsync(id, cancellationToken);
            if (item == null)
                throw new KeyNotFoundException("Option not found");

            item.Value = option.Value;
            item.ParentValue = option.ParentValue;
            item.SortOrder = option.SortOrder;
            item.IsActive = option.IsActive;

            await _dataService.UpdateAsync(item, cancellationToken);
            return MapToDTO(item);
        }

        public async Task DeleteAsync(int id, CancellationToken cancellationToken)
        {
            var item = await _dataService.GetByIdAsync(id, cancellationToken);
            if (item == null)
                throw new KeyNotFoundException("Option not found");

            await _dataService.RemoveAsync(item, cancellationToken);
        }

        private static DropdownOptionDTO MapToDTO(DropdownOption option)
        {
            return new DropdownOptionDTO
            {
                Id = option.Id,
                Category = option.Category,
                Value = option.Value,
                ParentValue = option.ParentValue,
                SortOrder = option.SortOrder,
                IsActive = option.IsActive
            };
        }
    }
}